SERVICE MANUAL. Mini Hi-Fi System MODEL: MCT806 (MCT806, MCS1306F/W) CAUTION BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

Transcription

1 Internal Use Only Website SERVICE MANUAL Mini Hi-Fi System MODEL: MCT806 (MCT806, MCS1306F/W) SERVICE MANUAL MODEL: MCT806 (MCT806, MCS1306F/W) CAUTION BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. P/ : AFN JUNE, 2011

2 CONTENTS SECTION 1...GENERAL SECTION 2...CABINET & MAIN CHASSIS SECTION 3...ELECTRICAL SECTION 4...REPLACEMENT PARTS LIST 1-1

3 SECTION 1 SUMMARY CONTENTS SERVICING PRECAUTIONS ESD PRECAUTIONS SERVICE INFORMATION FOR EEPROM PROGRAM DOWNLOAD GUIDE SPECIFICATIONS

4 SERVICING PRECAUTIONS TES REGARDING HANDLING OF THE PICK-UP 1. Notes for transport and storage 1) The pick-up should always be left in its conductive bag until immediately prior to use. 2) The pick-up should never be subjected to external pressure or impact. Storage in conductive bag Drop impact 2. Repair notes 1) The pick-up incorporates a strong magnet, and so should never be brought close to magnetic materials. 2) The pick-up should always be handled correctly and carefully, taking care to avoid external pressure and impact. If it is subjected to strong pressure or impact, the result may be an operational malfunction and/or damage to the printed-circuit board. 3) Each and every pick-up is already individually adjusted to a high degree of precision, and for that reason the adjustment point and installation screws should absolutely never be touched. 4) Laser beams may damage the eyes! Absolutely never permit laser beams to enter the eyes! Also NEVER switch ON the power to the laser output part (lens, etc.) of the pick-up if it is damaged. NEVER look directly at the laser beam, and don t allow contact with fingers or other exposed skin. 5) Cleaning the lens surface If there is dust on the lens surface, the dust should be cleaned away by using an air bush (such as used for camera lens). The lens is held by a delicate spring. When cleaning the lens surface, therefore, a cotton swab should be used, taking care not to distort lens. Magnet Pressure Pressure How to hold the pick-up Cotton swab Conductive Sheet 6) Never attempt to disassemble the pick-up. Spring has excess pressure. If the lens is extremely dirty, apply isopropyl alcohol to the cotton swab. (Do not use any other liquid cleaners, because they will damage the lens.) Take care not to use too much of this alcohol on the swab, and do not allow the alcohol to get inside the pick-up. 1-3

5 TES REGARDING COMPACT DISC PLAYER REPAIRS 1. Preparations 1) Compact disc players incorporate a great many ICs as well as the pick-up (laser diode). These components are sensitive to, and easily affected by, static electricity. If such static electricity is high voltage, components can be damaged, and for that reason components should be handled with care. 2) The pick-up is composed of many optical components and other high-precision components. Care must be taken, therefore, to avoid repair or storage where the temperature or humidity is high, where strong magnetism is present, or where there is excessive dust. 2. Notes for repair 1) Before replacing a component part, first disconnect the power supply lead wire from the unit 2) All equipment, measuring instruments and tools must be grounded. 3) The workbench should be covered with a conductive sheet and grounded. When removing the laser pick-up from its conductive bag, do not place the pick-up on the bag. (This is because there is the possibility of damage by static electricity.) 4) To prevent AC leakage, the metal part of the soldering iron should be grounded. 5) Workers should be grounded by an armband (1 MΩ) 6) Care should be taken not to permit the laser pick-up to come in contact with clothing, in order to prevent static electricity changes in the clothing to escape from the armband. 7) The laser beam from the pick-up should NEVER be directly facing the eyes or bare skin. Armband Resistor (1 MΩ) Conductive Sheet Resistor (1 MΩ) 1-4

6 Electrostatically Sensitive Devices (ESD) Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components commonly are called Electrostatically Sensitive Devices (ESD). Examples of typical ESD devices are integrated circuits and some field-effect transistors and semiconductor chip components. The following techniques should be used to help reduce the incidence of component damage caused by static electricity. 1. Immediately before handling any semiconductor component or semiconductor-equipped assembly, drain off any electrostatic charge on your body by touching a known earth ground. Alternatively, obtain and wear a commercially available discharging wrist strap device, which should be removed for potential shock reasons prior to applying power to the unit under test. 2. After removing an electrical assembly equipped with ESD devices, place the assembly on a conductive surface such as aluminum foil, to prevent electrostatic charge buildup or exposure of the assembly. 3. Use only a grounded-tip soldering iron to solder or unsolder ESD devices. 4. Use only an anti-static solder removal device. Some solder removal devices not classified as "anti-static" can generate electrical charges sufficient to damage ESD devices. 5. Do not use freon-propelled chemicals. These can generate electrical charges sufficient to damage ESD devices. 6. Do not remove a replacement ESD device from its protective package until immediately before you are ready to install it. (Most replacement ESD devices are packaged with leads electrically shorted together by conductive foam, aluminum foil or comparable conductive materials). 7. Immediately before removing the protective material from the leads of a replacement ESD device, touch the protective material to the chassis or circuit assembly into which the device will by installed. CAUTION : BE SURE POWER IS APPLIED TO THE CHASSIS OR CIRCUIT, AND OBSERVE ALL OTHER SAFETY PRECAUTIONS. 8. Minimize bodily motions when handing unpackaged replacement ESD devices. (Otherwise harmless motion such as the brushing together of your clothes fabric or the lifting of your foot from a carpeted floor can generate static electricity sufficient to damage an ESD device). CAUTION. GRAPHIC SYMBOLS ESD PRECAUTIONS THE LIGHTNING FLASH WITH APROWHEAD SYMBOL. WITHIN AN EQUILATERAL TRIANGLE, IS INTENDED TO ALERT THE SERVICE PERSONNEL TO THE PRESENCE OF UNINSULATED DANGEROUS VOLTAGE THAT MAY BE OF SUFFICIENT MAGNITUDE TO CONSTITUTE A RISK OF ELECTRIC SHOCK. THE EXCLAMATION POINT WITHIN AN EQUILATERAL TRIANGLE IS INTENDED TO ALERT THE SERVICE PERSONNEL TO THE PRESENCE OF IMPORTANT SAFETY INFORMATION IN SERVICE LITERATURE. 1-5

7 SERVICE INFORMATION FOR EEPROM POWER ON FLD no disc status Remote control + Front STOP push same timing during 5s DETECT NEW EEPROM (OPTION EDIT SCREEN) FLD OP-0. Move to appropriate position and make changes with remote control. (,, /, REPEAT ) Press STOP key NAME OP0 OP1 OP2 OP3 OP4 OP5 OP6 OP7 OP8 OP9 HEX B0 09 FLD write ok Remote control + Front STOP push same timing FLD E2P CLR Completed 1-6

8 1. AUDIO PROGRAM PROGRAM DOWNLOAD GUIDE Download program file name must be MCT806_YYMMDDX.HEX If security program (Water Wall) is activated on your PC, you must save the file to the usb storage device and disable the security software, then download the file to your set. Caution: When downloading the file, you should neither unplug the usb device, change to the other function, nor power off the device. Usb device must be unplugged when the downloading process is completed. ON VFD DISPLAY SCREEN USB READ FIRMWARE WRITE UPDATED POWER OFF AUTOMATICALLY Insert usb device at usb function When completed, remove usb device. 1-7

9 2. CD PROGRAM Download program file name must be HD003_DATE_00.BIN If security program (Water Wall) is activated on your PC, you must save the file to the usb storage device and disable the security software, then download the file to your set. Caution: When downloading the file, you should neither unplug the usb device, change to the other function, nor power off the device. Usb device must be unplugged when the downloading process is completed. ON VFD DISPLAY SCREEN USB READ FIRMWARE FINISH UPDATED POWER OFF AUTOMATICALLY Insert usb device at usb function When completed, remove usb device. 1-8

10 3. BEAT BOX PROGRAM Download program file name must be BEAT_BIN_DATE_00.BIN If security program (Water Wall) is activated on your PC, you must save the file to the usb storage device and disable the security software, then download the file to your set. Caution: When downloading the file, you should neither unplug the usb device, change to the other function, nor power off the device. Usb device must be unplugged when the downloading process is completed. ON VFD DISPLAY SCREEN USB READ FIRMWARE FINISH UPDATED POWER OFF AUTOMATICALLY Insert usb device at usb function When completed, remove usb device. 1-9

11 SPECIFICATIONS GENERAL Power requirements Refer to main label Power consumption Refer to main label Dimensions (W x H x D) 285 x 390 x 380 mm without foot Net Weight (Approx.) 7 kg Operating temperature 5 C to 35 C (41 F to 95 F) Operating humidity 5 % to 90 % Bus Power Supply USB DC 5 V 500 ma ipod DC 5 V 1 A INPUTS/ OUTPUTS ANALOG AUDIO IN 1.2 Vrms (1 khz), 600 Ω, RCA jack (L, R) x 1 PORT. IN 0.5 Vrms (3.5 mm stereo jack) ANALOG AUDIO OUT 800 mvrms (1 khz), 600 Ω, RCA jack (L, R) x 1 TUNER FM Tuning Range AM Tuning Range 87.5 to MHz or to MHz 522 to khz, 520 to khz or 522 to khz AMPLIFI ER Stereo mode 270 W W (4 Ω at 1 khz) Surround mode Front 270 W W (4 Ω at 1 khz, THD 10 %) Subwoofer 270 W (4 Ω at 60 Hz, THD 10 %) CD Frequency Response Signal-to-noise ratio Dynamic range SPEAKERS Front speaker Type Impedance Rated Input Power Max. Input power Net Dimensions (W x H x D) Net Weight Passive subwoofer Type Impedance Rated Input Power Max. Input power Net Dimensions (W x H x D) Net Weight 40 to Hz 75 db 80 db 2 Way 2 speaker 4 Ω 270 W 540 W 263 x 465 x 360 mm 7.9 kg 1 Way 1 speaker 4 Ω 270 W 540 W 350 x 456 x 357 mm 9.4 kg Design and specifications are subject to change without notice. 1-10

12 SECTION 2 CABINET & MAIN CHASSIS CONTENTS DISASSEMBLY AND ASSEMBLY FOR MECHANISM DECK (CDM-H1803) ORDER OF DISASSEMBLY FOR MECHANISM DECK ORDER OF ASSEMBLY FOR MECHANISM DECK EXPLODED VIEWS CABINET AND MAIN FRAME SECTION (MCT806) MECHANISM DECK SECTION (CDM-H1803) PACKING ACCESSORY SECTION SPEAKER SECTION

13 DISASSEMBLY AND ASSEMBLY FOR MECHANISM DECK (CDM-H1803) 1. ORDER OF DISASSEMBLY FOR MECHANISM DECK 1) Disassemble the Cover Guide Disc. Figure 1 2) Disassemble the Loading FFC from the Main PCB Assy. Turn the Gear in OPEN direction as shown in Figure 2 to take out the Tray Loading Assy in 3 direction Figure 2 1 3) Pull up the Holder 1 to completely disassemble the Tray Loading Assy from the Base Main Assy. 2 Figure 3 2-2

14 ORDER OF DISASSEMBLY FOR MECHANISM DECK 1 4) Loosen the screw to pull up and disassemble the Tray Disc. 2 Figure 4 5) Loosen the screw to pull up and disassemble the Gear Tray CAM. Figure 5 6) Disassemble the Gear Tray, Tray Motor Assy and Loading PCB Assy from the Tray Loading. Figure 6 2-3

15 ORDER OF DISASSEMBLY FOR MECHANISM DECK Figure 7 7) Disassemble the Harness Cable from the Base Main. Disassemble the Base Sled Assy from the Base Main by referring to Figure Figure 9 9) Push the Guide UD in direction 1 to disassemble it from the Base Main. Figure 8 8) Disassemble each gear part, Clamp Disc, Clamp Magnet and Cover Plate from the Base Main. Disassemble the Loading Motor Assy by being careful of the hook on the surface of the Base Main. 2-4

16 ORDER OF DISASSEMBLY FOR MECHANISM DECK 10) Use a solder to remove the Motor Jump Wire from the Main PCB Assy and then disassemble the FFC Cable. Loosen the screw to disassemble the Main PCB Assy Figure

17 2. ORDER OF ASSEMBLY FOR MECHANISM DECK 1) Assemble the Loading Motor Assy to the Base Main. (When assembling the Motor Assy, use the hook on the surface of the Base Main to preassemble, and then tighten the screws.) Figure 1 2) Set the Guide UD on the Base Main. After setting the part, push it in direction Figure 2 2-6

18 ORDER OF ASSEMBLY FOR MECHANISM DECK 1 2 3) Set the Gear Loading 1 and Gear Pulley 2 on the Base Main. Hang the belt between the Gear Pulley and Motor Pulley. Assemble the Clamp Disc, Clamp Magnet and Cover Plate to the Base Main. Figure 3 4) After setting the Gear Main 2, Gear Pu Up 3 and Gear Pu Down 4 on the Base Main, tighten the screws. After assembling the Gear Main, align the location as shown in Figure Figure 4 2-7

19 ORDER OF ASSEMBLY FOR MECHANISM DECK Figure 5 Figure 6 5) After setting the Main PCB Assy on the Base Main, tighten the screw. (Set the part accurately on the hook) Solder the Motor Jump Wire on the PCB set on the Base Main. 6) Set the Base Sled Assy on the Base Main. (When setting the part, assemble with the CAM part of the Guide UD inserted in two locations of the Boss of Frame UD) Align the FFC to the Guide and connect the Harness Cable. 2-8

20 ORDER OF ASSEMBLY FOR MECHANISM DECK 1 2 Figure 7 Figure 8 7) After setting the Gear Tray, Tray Motor Assy and Loading PCB Assy on the Tray Loading, tighten the screw. 8) Assemble the Gear Tray CAM on the Tray Loading and set the Tray Disc. (When assembling, check the location of the Gear Tray CAM and Tray Disc as shown in the Figure) 2-9

21 ORDER OF ASSEMBLY FOR MECHANISM DECK Figure 9 Figure 10 9) Assemble the Tray Loading Assy on the Base Main Assy as shown in the Figure. After assembling, insert the Loading FFC to the 5 Pin Wafer of Main PCB Assy. 10) After setting the Cover Guide Disc, tighten the screw. 2-10

22 EXPLODED VIEWS 1. CABINET AND MAIN FRAME SECTION (MCT806) TES) THE EXCLAMATION POINT WITHIN AN EQUILATERAL TRIANGLE IS INTENDED TO ALERT THE SERVICE PERSONNEL TO THE PRESENCE OF IMPORTANT SAFETY INFORMATION IN SERVICE LITERATURE A49 CABLE1 H A CABLE CABLE7 VFD E VOLUME J A42 ipod F 463 I 464 A26 C D A47 SMPS A B 255B A C A44 I C A45 USB CABLE2 G G D A46 H MAIN F B J CN102 E A 271 CN

23 2. MECHANISM DECK SECTION (CDM-H1803) MEMO A A A A B B A

24 3. PACKING ACCESSORY SECTION 801 Owner s Manual 900 Remote Control 824 AM Loop Antenna 910 Cover 825 FM Wire Antenna 803 Packing 804 Bag 802 Box 2-15

25 4. SPEAKER SECTION 4-1. FRONT SPEAKER (MCS1306F) A60L A60R 2-16

26 4-2. PASSIVE SUBWOOFER (MCS1306W) A

27 MEMO 2-18

28 SECTION 3 ELECTRICAL CONTENTS TRAINING MASTER SOUND FROM SPEAKERS SOUND IN AUX FUNCTION SOUND IN PORT. IN FUNCTION SOUND IN IPOD FUNCTION SOUND IN AM/FM FUNCTION SOUND IN CD FUNCTION SOUND IN USB FUNCTION POWER ONE POINT REPAIR GUIDE POWER BOOTING WHEN POWER ON THE SET VFD IS T DISPLAYED WHEN POWER ON THE SET OPERATION OF MD SOUND ELECTRICAL TROUBLESHOOTING GUIDE POWER SUPPLY ON SMPS BOARD SYSTEM PART AUDIO PART DIGITAL AUDIO AMP CHECK WAVEFORMS WIRING DIAGRAM BLOCK DIAGRAMS OVERALL BLOCK DIAGRAM SMPS BLOCK DIAGRAM POWER BLOCK DIAGRAM CIRCUIT DIAGRAMS SMPS CIRCUIT DIAGRAM MICOM CIRCUIT DIAGRAM PWM CIRCUIT DIAGRAM AMP CIRCUIT DIAGRAM DSP CIRCUIT DIAGRAM RF SERVO CIRCUIT DIAGRAM ADC CIRCUIT DIAGRAM BEAT BOX CIRCUIT DIAGRAM VFD CIRCUIT DIAGRAM VOLUME CIRCUIT DIAGRAM USB CIRCUIT DIAGRAM IPOD CIRCUIT DIAGRAM MIC CIRCUIT DIAGRAM (OPTIONAL PART) CIRCUIT VOLTAGE CHART PRINTED CIRCUIT BOARD DIAGRAMS MAIN P.C.BOARD SMPS P.C.BOARD VFD P.C.BOARD VOLUME P.C.BOARD USB P.C.BOARD IPOD P.C.BOARD MIC P.C.BOARD (OPTIONAL PART)

29 1. SOUND FROM SPEAKERS TRAINING MASTER Are the speaker cables connected correctly between the speaker terminals on the unit and the speakers? Make sure to connect the cables to each specified connector tightly on the unit. Connect the woofer cables to the WOOF SYSTEM connectors on the rear panel. Does the customer select correctly the input function he or she wants to listen to? Make sure to connect some cables like A/V cables and FM/AM antenna cables. After pressing FUNCTION, is CD, USB, AUX, IPOD, AM or FM displayed? Make sure to select the desired input function pressing FUCTION button. Turn the master volume clockwise for the volume up. The volume level LEDs around the master volume will be turned on more and more while turning it clockwise for the volume up. Is there any sound from the selected input source? (AUX IN, USB, TUNER or CD Disc) Refer to a device s instruction manual and then check if there is sound output from it connecting another audio system. Are the sound spectrum level LEDs on the left and right side of the front panel being changed up and down according to the sound input gain? The sound spectrum level LEDs will be turned on/off repeatedly at regular intervals. The speakers cables might be short-circuited with the chassis ground. Be careful not to be shorted each other. The sound is output from the speakers. Sound OK 3-2

30 2. SOUND IN AUX FUNCTION TRAINING MASTER Does the customer select correctly the AUX function he or her wants to listen to? Make sure to connect some cables between the AUX IN jacks of the unit and the Audio output jacks of a external Audio device. After pressing the FUNCTION, is AUX displayed on VFD? Make sure to select the AUX IN function pressing the AUX/IPOD/PORT. IN button. Turn the master volume clockwise for the volume up. The volume level LEDs around the master volume will be turned on more and more while turning it clockwise for the volume up. Is there any sound from the selected input source? Refer to a device s instruction manual and then check if there is sound output from it connecting another audio system Are the sound spectrum level LED s on the left and right side of the front panel being changed up and down according to the sound input gain? The sound spectrum level LED s will be turned on/off repeatedly at regular intervals. A speaker cable might be short-circuited with the chassis ground. Be careful not to be shorted each other. Are the speaker cables connected correctly between the speaker terminals on the unit and the speakers? Make sure to connect the cables to each specified connector tightly on the unit. The sound is output from the speakers. Sound OK 3-3

31 TRAINING MASTER 3. SOUND IN PORT. IN FUNCTION Does the customer select correctly the PORT. IN function he or her wants to listen to? Make sure to connect a cable between the PORT. IN jack of the unit and the Audio output jack of a portable device like a MP3 player. Is PORT. IN displayed on VFD? Make sure to select the PORT. IN function pressing the AUX/IPOD/PORT. IN button. Turn the master volume clockwise for the volume up. The volume level LEDs around the master volume will be turned on more and more while turning it clockwise for the volume up. Is there any sound from the selected input source? Refer to a portable device s instruction manual and then check if there is sound output from it connecting another audio system. Are the sound spectrum level LED s on the left and right side of the front panel being changed up and down according to the sound input gain? The sound spectrum level LED s will be turned on/off repeatedly at regular intervals. A speaker cable might be short-circuited with the chassis ground. Be careful not to be shorted each other. Are the speaker cables connected correctly between the speaker terminals on the unit and the speakers? Make sure to connect the cables to each specified connector tightly on the unit. The sound is output from the speakers. Sound OK 3-4

32 4. SOUND IN IPOD FUNCTION TRAINING MASTER Does the customer select correctly the ipod function he or she wants to listen to? Make sure to put a ipod or a iphone on the docking system on the top of the unit. Does the customer use the compatible ipod? Make sure that The unit supports the models as follows/ipod nano 1 G, 2 G, 3 G, 4 G, 5 G, 6 G/ ipod classic/ ipod 4 G, 5 G/ ipod touch 2 G, 3 G, 4 G/ iphone 3 G, 4 G/. After displaying Loading, is IPOD displayed on VFD? If ERROR message is displayed, make sure firmly to put a ipod or a iphone on the docking system on the top of the unit. When the battery of a ipod or a iphone is fully discharged, the unit can not detect IPOD function, Please wait for a moment and then it will work after charging a little. After selecting desired songs using the user interface of a ipod or a iphone, press PALY button and turn the master volume clockwise for the volume up. The volume level LEDs around the master volume will be turned on more and more while turning it clockwise for the volume up. Is there any sound from ipod or iphone? Refer to a device s instruction manual and then check if there is sound output from it connecting another audio system. Are the sound spectrum level LED s on the left and right side of the front panel being changed up and down according to the sound input gain? The sound spectrum level LED s will be turned on/off repeatedly at regular intervals. A speaker cable might be short-circuited with the chassis ground. Be careful not to be shorted each other. Are the speaker cables connected correctly between the speaker terminals on the unit and the speakers? Make sure to connect the cables to each specified connector tightly on the unit. The sound is output from the speakers. Sound OK 3-5

33 5. SOUND IN AM/FM FUNCTION TRAINING MASTER Does the customer select correctly the AM/FM function he or she wants to listen to? Make sure to connect AM/FM antennas on the rear panel of the unit. Is AM or FM displayed on VFD? Make sure to select AM or FM function pressing the FUNC button. After tuning a desired channel using the TUNING± button, is the sound quality good to listen to the music? To prevent noise pickup, keep the AM Loop antenna away from the unit and other components. Be sure to fully extend the FM wire antenna. After connecting the FM wire antenna, keep it horizontal. Is the signal strength of the radio station too week? Make sure to tune the station manually. Are the sound spectrum level LED s on the left and right side of the front panel being changed up and down according to the sound input gain? The sound spectrum level LED s will be turned on/off repeatedly at regular intervals. A speaker cable might be short-circuited with the chassis ground. Be careful not to be shorted each other. Are the speaker cables connected correctly between the speaker terminals on the unit and the speakers? Make sure to connect the cables to each specified connector tightly on the unit. The sound is output from the speakers. Sound OK 3-6

34 6. SOUND IN CD FUNCTION TRAINING MASTER Does the customer select correctly the CD function he or she wants to listen to? Make sure to put on a CD disc on the tray. Is a CD disc put on the tray correctly? Make sure to insert the CD disc upside down. Does the unit display DISC on VFD when a disc is inserted on the tray? Place the disc with the label or printed side facing upwards. Does the customer use the supported mp3 or WMA music files on the disc? Check the playable disc. Make sure that the file extensions are.mp3 or.wma. When the unit searches music files in a CD disc, are the following messages displayed on VFD? SELECTED TRACKING # and TIME Make sure to check the supported MP3/WMA music file on the CD disc. Refer to the owner s manual. After selecting a track number using the SCAN or DISC# button, press PLAY button and turn the master volume clockwise for the volume up. The volume level LEDs around the master volume will be turned on more and more while turning it clockwise for the volume up. Is the sound quality good to listen to the music? Make sure to clean CD discs with a commercially available cleaner. If the surface of the disc is polluted or scratched, the sound quality can become bad or the customer can not listen to the music. Are the sound spectrum level LED s on the left and right side of the front panel changed up and down according to the sound input gain? 3-7 The sound spectrum level LED s will be turned on/off repeatedly at regular intervals. A speaker cable might be short-circuited with the chassis ground. Be careful not to be shorted each other.

35 TRAINING MASTER Are the speaker cables connected correctly between the speaker terminals on the unit and the speakers? Make sure to connect the cables to each specified connector tightly on the unit. The sound is output from the speakers. Sound OK 3-8

36 7. SOUND IN USB FUNCTION TRAINING MASTER Does the customer select correctly the USB function he or she wants to listen to? Make sure to insert a USB on the USB ports on the bottom of the unit. Is USB displayed on VFD? Make sure to select the USB function pressing the CD/USB button. Does the unit display SELECTED on VFD when a USB is inserted into the USB port? When No USB is displayed, make sure that the customer uses the recommended USB which support USB2.0 or USB1.1. Does the customer use the supported mp3 or WMA music files on the disc? Check if it is the playable disc or not. Make sure that the file extensions are.mp3 or.wma. When the unit searches music files in a USB, are the following messages displayed on VFD? SELECTED TRACKING # and TIME Make sure to check the compatible USB device and the supported MP3/WMA music file requirement. Refer to the owner s manual. After selecting a track number using the SCAN button, press PLAY button and turn the master volume clockwise for the volume up. The volume level LEDs around the master volume will be turned on more and more while turning it clockwise for the volume up. Are the sound spectrum level on the left and right side of the front panel being changed up and down according to the sound input gain? The sound spectrum level will be turned on/off repeatedly at regular intervals. A speaker cable might be short-circuited with the chassis ground. Be careful not to be shorted each other. Are the speaker cables connected correctly between the speaker terminals on the unit and the speakers? Make sure to connect the cables to each specified connector tightly on the unit. 3-9

37 TRAINING MASTER The sound is output from the speakers. Sound OK 8. POWER Is the power cord plugged into a electrical outlet? Make sure to plug the power cord of the unit into a electrical outlet. Does the Standby LED light in red color? If the customer can not see the red light on the front panel, the SMPS might have any problem. Please solve the problem referring to the service manual. Is the Standby LED turned off after pressing the Power button on the remote control? Replace the batteries with new ones if the remote control doesn t work. Are the messages displayed in the following order on VFD? HELLOW VOLUME 15 FUNCTION The SMPS might be not able to supply the power to drive the VFD. Refer to the service manual to fix it. Is there any sound from the speakers each input function? Make sure to connect speaker cables. Power & Sound OK 3-10

38 ONE POINT REPAIR GUIDE 1. POWER If the unit doesn t work by no power problem, repair the set according to the following guide FUSE & BRIDGE DIODE Solution Please check and replace F901, BD901, TH901, TH903 on SMPS board How to troubleshoot (Countermeasure) 1) Check if the fuse F901 is open or short-circuit. 2) Check if the bridge diode DB901 is short-circuit by over current with a digital multi meter. 3) Check if the NTC thermistor TH901 and TH902 is normal or open Service hint (Any picture / Remark) < F901 > If F901 is not short-circuit, replace it with a same specifications one. < BD901 > If BD901 is short-circuit, replace it with a new one. < TH901, TH903 > If TH901 or TH902 is open, replace it with a new one. 3-11

39 ONE POINT REPAIR GUIDE POWER If the unit doesn t work by no power problem, repair the set according to the following guide D951, ZD Solution Please check and replace D951, ZD951 on SMPS board How to troubleshoot (Countermeasure) 1) Check the Anode-Cathod Voltage of D951 with a digital multi-meter, it is normally 0.2 ~ 0.3 V. If it doesn t have any voltage, it s destroyed. Replace it with a new one. 2) Check if ZD951 is short-circuit. If it is short-circuit, and then replace it with a new one Service hint (Any picture / Remark) < SMPS schematic diagram > 3-12

40 ONE POINT REPAIR GUIDE 2. BOOTING WHEN POWER ON THE SET The set doesn t work when press the power button on the front board or the remote control FLASH MEMORY Solution Please check and replace IC101 on MAIN board How to troubleshoot (Countermeasure) 1) Check the 3.7VA to CN102, CN103, and CN104 in standby mode. If there is no 3.7 VA, check the SMPS. 2) Check 5.6 V, 12 VA, FL+, FL- and 32 V when power on the set. - If the set doesn t work regardless of what the KEY1 changes high to low while pressing the power button. X100 and X101 work normally but, if you can not power on the set, replace the IC101 with a new one on the main board Service hint (Any picture / Remark) < Signal check point > 3-13

41 ONE POINT REPAIR GUIDE 3. VFD IS T DISPLAYED WHEN POWER ON THE SET When power on the set, any icons or characters on VFD are not displayed VFD Solution Please check and replace DIG301 on FRONT board How to troubleshoot (Countermeasure) 1) Check if 32 V, FL+ and FL- are output from SMPS to VFD via the MAIN board. 2) Check if the IC101 outputs VFD_RST, VFD_CLK, VFD_STB, and VFD_STB to the FRONT board. 3) Check if the VFD grid current amplifier circuit (Q301, Q303, Q304) on the FRONT board. Check the drive signal to the transistor s base. If the control signals from VFD (TP302, TP303, TP304) isn t output, replace VFD with a new one. If the transistor doesn t work, replace it Service hint (Any picture / Remark) < Waveform of the grid current driver > 3-14

42 ONE POINT REPAIR GUIDE 4. OPERATION OF MD When no sound output in the CD function, you can not listen to music reading data from a CD disc if the servo motors in MD don t work. This step is for checking the SPINDLE MOTOR among them SPinDLE MOTOR Solution Please check and replace IC407, IC408 on MAIN board How to troubleshoot (Countermeasure) 1) Check the SPDO signal from Pin16 of IC407. If no signal, check 3.3V(RF) and X402. 2) Check the SP- & SP+ from IC408 to CN405 for driving SPinDLE motor. It is about 3.6 Vp-p. If no signal, check +1.8 V and +5 V for IC408. 3) Check if the FFC cable is solidly connected between CN405 and MD. 4) Check the MD. If the spindle motor is sort-circuit or has any trouble, it can not rotate CD discs. Please check the function after changing another MD Service hint (Any picture / Remark) < Waveform of SP- & SP+ for driving SPinDLE motor > < Signal check point > 3-15

43 ONE POINT REPAIR GUIDE OPERATION OF MD When no sound output in the CD function, you can not listen to music reading data from a CD disc if the servo motors in MD don t work. This step is for checking the SLED MOTOR among them SLED MOTOR Solution Please check and replace IC407, IC408 on MAIN board How to troubleshoot (Countermeasure) 1) Check the SLDO signal from Pin15 of IC407. If no signal, check 3.3V(RF) and X402. 2) Check the SLED+ & SLED-from IC408 to CN405 for driving SPinDLE motor. It is about 2.9 Vp-p. If no signal, check +1.8V and +5V for IC408. 3) Check if the FFC cable is solidly connected between CN405 and MD. 4) Check the MD. If the sled motor is sort-circuit or has any trouble, it can not move the pickup module. Please check the function after changing another MD Service hint (Any picture / Remark) < Waveform of SLED- & SLED+ for driving SLED motor > < Signal check point > 3-16

44 ONE POINT REPAIR GUIDE OPERATION OF MD When no sound output in the CD function, you can not listen to music reading data from a CD disc if the servo motors in MD don t work. This step is for checking the TRAY MOTOR among them TRAY MOTOR Solution Please check and replace IC407, IC408 on MAIN board How to troubleshoot (Countermeasure) 1) Check TUR+ & TUR-signals from Pin56 & 57 of IC501 to IC406. If no signal, check +5 V to IC406. 2) Check TUR_M+ & TUR_M- from IC406 to CN405 for driving TRAY motor. It is about 3.8 Vp-p. If no signal, check +5 V to IC406. If it has any trouble, replace it with a new one. 3) Check if the FFC cable is solidly connected between CN405 and MD. 4) Check the MD. If the tray motor is sort-circuit or has any trouble, it can not rotate the tray. Please check the function after changing another MD Service hint (Any picture / Remark) < Waveform of TUR_M± for driving TRAY motor > < Signal check point > 3-17

45 ONE POINT REPAIR GUIDE OPERATION OF MD When no sound output in the CD function, you can not listen to music reading data from a CD disc if the servo motors in MD don t work. This step is for checking the TRAY OPEN/CLOSE MOTOR among them TRAY OPEN / CLOSE MOTOR Solution Please check and replace IC407, IC408 on MAIN board How to troubleshoot (Countermeasure) 1) Check MOT_OPEN & MOT_CLOSE signals from Pin104 & 105 of IC501 to IC408. If no signal, check +1.8 V & + 5 V to IC408. 2) Check LOAD± from IC406 to CN405 for driving the tray open / close motor. It is about 3.85 Vp-p. If no signal, check +5 V to IC406. If it has any trouble, replace it with a new one. 3) Check if the FFC cable is solidly connected between CN405 and MD. 4) Check the MD. If the tray motor is sort-circuit or has any trouble, it can not open or close the tray. Please check the function after changing another MD Service hint (Any picture / Remark) < Waveform for driving TRAY open / close motor > < Signal check point > 3-18

46 ONE POINT REPAIR GUIDE OPERATION OF MD When no sound output in the CD function, you can not listen to music reading data from a CD disc if the pickup module in MD doesn t work. This step is for checking the LASER TRACKING ACTUATOR LASER TRACKING ACTUATOR Solution Please check and replace IC407, IC408 on MAIN board How to troubleshoot (Countermeasure) The tracking actuator makes the laser beam be positioned in the center of a track on CD disc. 1) Check the TRD signal from Pin14 of IC407. If no signal, check 3.3 V(RF) and X402. 2) Check T- & T+ from IC408 to CN404 for driving the tracking actuator. If no signal, check +1.8 V and +5 V for IC408. 3) Check if the FFC cable is solidly connected between CN404 and MD. 4) Check the MD. If the pickup module has any trouble, it can not move the laser beam on the left or right side. Please check the function after changing another MD Service hint (Any picture / Remark) < Waveform of T± for driving TRACKING actuator > < Signal check point > 3-19

47 ONE POINT REPAIR GUIDE OPERATION OF MD When no sound output in the CD function, you can not listen to music reading data from a CD disc if the pickup module in MD doesn t work. This step is for checking the LASER FOCUSING ACTUATOR LASER FOCUSING ACTUATOR Solution Please check and replace IC407, IC408 on MAIN board How to troubleshoot (Countermeasure) The focusing actuator makes the laser beam keep a regular interval with the surface of a CD disc. 1) Check the FOD signal from Pin13 of IC407. If no signal, check 3.3 V(RF) and X402. 2) Check F- & F+ from IC408 to CN404 for driving the focusing actuator. If no signal, check +1.8 V and +5 V for IC408. 3) Check if the FFC cable is solidly connected between CN404 and MD. 4) Check the MD. If the pickup module has any trouble, it can not move the laser beam on the top or bottom side. Please check the function after changing another MD Service hint (Any picture / Remark) < Waveform of TR± for driving FOCUSING actuator > < Signal check point > 3-20

48 ONE POINT REPAIR GUIDE 5. SOUND There is no sound output in the CD FUNCTION, repair the set according to the following guide IN THE CD FUNCTION Solution Please check and replace IC501, IC602, IC801 on MAIN board How to troubleshoot (Countermeasure) 1) Check CD_BCK, CD_LRCK, & CD_DATA signals from IC407 to IC501. If no signal, check if the RF & servo signals from MD is entered to IC407. Refer to the No operation of MD guide on Item 4. 2) Check the following I2S signal flow. < I2S audio signal Interface > - DAC_BCK: IC501_87Pin --> IC507_16Pin --> IC602_4Pin - DAC_LRCK : IC501_88Pin --> IC507_5Pin --> IC602_4Pin (44.1 khz) - DAC_DATA : IC501_83Pin --> R817 next to IC01 --> IC602_6/9Pin - DAC_MCLK : IC501_86Pin --> R818 next to IC801 If there is any trouble, check the power for each IC. The power is normal but, if the signal waveform to the IC is distorted or no signal, replace it with a new one. 3) Check if Digital audio AMP block on Item 5-2 is normal Service hint (Any picture / Remark) IC407 BU9543KV BEAT_DATA IC501 MLC9800 DAC_BCK DAC_LRCK DAC_MCLK IC602 PS9850 PWM AMP IC TAS5631 IC801 FS502B BEAT BOX < I2S Signal Flow > < Waveform of I2S audio interface signals > 3-21

49 ONE POINT REPAIR GUIDE SOUND There is no sound output by DIGITAL AUDIO AMP DAMAGE, repair the set according to the following guide BY DIGITAL AUDIO AMP DAMAGE (IN ALL FUNCTIONS) Solution Please check and replace IC701, IC702, IC703 on MAIN board How to troubleshoot (Countermeasure) 1) Check FL±, FR±, RL±, RR±, SW1±, & SW2± signals from IC602 to IC701, 702 & 703 each input function. If no signal, check if I2S audio signals are entered to IC602. Refer to I2S audio signal interface on Item ) Check PVDD_48V. If 48 V is abnormal, check the SMPS. 3) Check +12 for driving the gate of AMP IC. a. All the powers are normal, but if +12 V is low, there is possible for AMP IC to be damaged. b. Remove a ferrite bead among FB703, FB707 and FB713 one by one. When removed a ferrite bead, if +12 V is recovered, the IC connected to it was damaged. c. Replace the IC with a new one. 4) Check the impedance between SPK+ & GND and SPK- & GND. a. If the impedance is 0 Ω, the IC must be damaged. b. After removing the heat sink, replace it with a new one. Comments!! If a AMP IC among three is damaged, AMP_PDN to R103 changes HIGH to LOW at regular intervals. The sound is not output by AMP power down function Service hint (Any picture / Remark) < Signal check point > 3-22

50 ONE POINT REPAIR GUIDE SOUND There is no sound output in the USB FUNCTION, repair the set according to the following guide IN THE USB FUNCTION Solution Please check and replace IC501, IC504 on MAIN board & IC3U01 on USB board How to troubleshoot (Countermeasure) 1) Check +5VU to USB board. If the USB LEDs are turned on, the voltage is okay, if so not, check +5.6 V to Pin8 of CN602. 2) Check USB D± from main board to USB board. a. Check USB_HUB_DN/DP signals to IC501(Pin116, 117) b. Check USB1/2_DN/DP signals from IC504 to CN602 (Pin10, 11, 13, & 14) If there is any trouble, check the power for each IC. The power is normal but, if the signal waveform to the IC is distorted or no signal, replace it with a new one. 3) Check if Digital audio AMP block on item 5-2 is normal Service hint (Any picture / Remark) IC504 USB2512B USB_D USB Board USB DAC_MCLK ADC_DATA IC501 MLC9800 DAC_BCK DAC_LRCK IC602 PS9850 PWM AMP IC TAS5631 DAC_DATA DAC_MCLK IC801 FS502B BEAT BOX BEAT_DATA < USB function signal flow > < Waveform of USB D± signal > 3-23

51 ONE POINT REPAIR GUIDE SOUND There is no sound output in the AUX FUNCTION, repair the set according to the following guide IN THE AUX FUNCTION Solution Please check and replace IC202 on MAIN board How to troubleshoot (Countermeasure) 1) Check AUX_L/R signals to IC202 (Pin7, 8). 2) Check if ADC_BCK, ADC_LRCK, & DAC_MCLK are entered from IC501 to IC202. 3) Check if ADC_DATA is entered from IC202 to IC501. If no signal, check +5 V & +3.3 V(ADC) for IC202. If is NG, replace it a new one. 4) Check the following I2S signal flow from IC501 to IC602. (Refer to Item 5-1.) If there is any trouble, check the power for each IC. The power is normal but, if the signal waveform to the IC is distorted or no signal, replace it with a new one. 5) Check if the digital audio AMP block is okay. Refer to Digital Audio AMP guide on Item 5-2. If AMP is damaged, replace it with a new one Service hint (Any picture / Remark) IC202 CS5346 AUX_L/R AUX DAC_MCLK IC501 MLC9800 ADC_DATA DAC_BCK DAC_LRCK IC602 PS9850 PWM AMP IC TAS5631 DAC_DATA DAC_MCLK IC801 FS502B BEAT BOX BEAT_DATA < AUX function signal flow > < Signal check point > 3-24

52 ONE POINT REPAIR GUIDE SOUND There is no sound output in the IPOD FUNCTION, repair the set according to the following guide IN THE IPOD FUNCTION Solution Please check and replace IC201, IC202, IC203 on MAIN board How to troubleshoot (Countermeasure) 1) Check USB VBUS_+5V to Pin3 of CN201 after inserting the ipod to IPOD Docking System. If no power, check if IPOD_P_CTRL to Pin3 of IC203 change Low to High. 2) Check if IPOD Audio L/R signals are entered from Pin11 & 12 of CN201 to Pin10 & 6 of IC201. 3) Check if the IPOD Audio L/R that some noise is removed to IC201 are output from Pin1 & 5 of IC201. If no signal, replace the IC with a new one. 4) Check IPOD_L/R signals from 1 & 5 of IC201 to IC202(Pin26, 27). 5) Check if ADC_BCK, ADC_LRCK & DAC_MCLK are entered from IC501 to IC202. 6) Check if ADC_DATA is entered from IC202 to IC501. If there is no signal, check +5 V & +3.3 V(ADC) for IC202. If is NG, replace it a new one. 7) Check the following I2S signal flow from IC501 to IC602. (Refer to Item 5-1.) If there is any trouble, check the power for each IC. The power is normal but, if the signal waveform to the IC is distorted or no signal, replace it with a new one. 8) Check if the digital audio AMP block is okay. Refer to Digital Audio AMP guide on Item 5-2. If an AMP is damaged, replace it with a new one Service hint (Any picture / Remark) IC202 CS5346 IPOD_L/R ipod DAC_MCLK ADC_DATA IC501 MLC9800 DAC_BCK DAC_LRCK IC602 PS9850 PWM AMP IC TAS5631 DAC_DATA DAC_MCLK IC801 FS502B BEAT BOX BEAT_DATA < ipod function signal flow > < Signal check point > 3-25

53 ONE POINT REPAIR GUIDE SOUND There is no sound output in the PORT. IN FUNCTION, repair the set according to the following guide IN THE PORT. IN FUNCTION Solution Please check and replace IC202 on MAIN board How to troubleshoot (Countermeasure) 1) Check PT_L/R signal from Main board to USB board. 2) Check if PT_LR is entered from Pin1 & 3 of CN3U01 to Pin1 & 3 to CN502. 3) Check POT_L/R signals to IC202(Pin21, 22). 4) Check if ADC_BCK, ADC_LRCK, & DAC_MCLK are entered from IC501 to IC202. 5) Check if ADC_DATA is entered from IC202 to IC501. If no signal, check +5 V & +3.3 V(ADC) for IC202. If is NG, replace it a new one. 6) Check the following I2S signal flow from IC501 to IC602. (Refer to Item 5-1.) If there is any trouble, check the power for each IC. The power is normal but, if the signal waveform to the IC is distorted or no signal, replace it with a new one. 7) Check if the digital audio AMP block is okay. Refer to Digital Audio AMP guide on Item 5-2. If AMP is damaged, replace it with a new one Service hint (Any picture / Remark) IC202 CS5346 POT_L/R USB Board POT. IN DAC_MCLK IC501 MLC9800 ADC_DATA DAC_BCK DAC_LRCK IC602 PS9850 PWM AMP IC TAS5631 DAC_DATA DAC_MCLK IC801 FS502B BEAT BOX BEAT_DATA < PORT. IN function signal flow > < Signal check point > 3-26

54 ONE POINT REPAIR GUIDE SOUND There is no sound output in the TUNER FUNCTION, repair the set according to the following guide IN THE TUNER FUNCTION Solution Please check and replace IC202, TU101 on MAIN board How to troubleshoot (Countermeasure) 1) Check if TUNER_LR is entered from Pin1 & 3 of T1U01 to IC202(Pin23, 24). If no signals, Check +3.3 V for Tuner power. Check if the Tuner control signals (CLK, DAT, CE, RST, GPO2) are entered from IC101 to TU101. If it doesn t work, replace TUNER with a new one. 2) Check if ADC_BCK, ADC_LRCK, & DAC_MCLK are entered from IC501 to IC202. 3) Check if ADC_DATA is entered from IC202 to IC501. If no signal, check +5 V & +3.3 V(ADC) for IC202. If is NG, replace it a new one. 4) Check the following I2S audio signal flow from IC501 to IC602. (Refer to Item 5-1.) If there is any trouble, check the power for each IC. The power is normal but, if the signal waveform to the IC is distorted or no signal, replace it with a new one. 5) Check if the digital audio AMP block is okay. Refer to Digital Audio AMP guide on Item 5-2. If AMP is damaged, replace it with a new one Service hint (Any picture / Remark) IC202 CS5346 TUNER_L/R TUNER DAC_MCLK DAC_DATA IC501 MLC9800 ADC_DATA DAC_MCLK DAC_BCK DAC_LRCK IC602 PS9850 PWM AMP IC TAS5631 IC801 FS502B BEAT BOX BEAT_DATA < TUNER function signal flow > < Signal check point > 3-27

55 ONE POINT REPAIR GUIDE SOUND There is no sound output in the MIC IN FUNCTION, repair the set according to the following guide IN THE MIC IN FUNCTION Solution Please check and replace IC603, IC605 on MAIN board How to troubleshoot (Countermeasure) 1) Check MIC_SIG signal to Pin 27 of CN104. If no signal, Check the signal to Pin 3 of CN301 on the FRONT board. Check if the signal is entered from Pin3 of CN301 to MAIN board. 2) Check if MIC_SIG is entered from Pin27 of CN104 to Pin3 to IC605 (MIC AMP). 3) Check if the amplified signal is entered from Pin4 of IC605. If no signal output, check +12 V for IC605, replace IC605 with a new one if it has a problem. 4) Check if MIC_BCK & MIC_LRCK is entered from IC507 to IC603 and DAC_MLCK from IC501 to IC603. Check if MIC_DATA is entered from Pin 9 of IC603I to Pin 7 of IC602. If no signal, check +5 V & +3.3 V for IC603. If it is abnormal, change replace it a new one. 6) Check the following I2S signal flow from IC603 to IC602. If there is any trouble, check the power for each IC. If the signals are abnormal, replace it a new one. 7) Check if the digital audio AMP block is okay. Refer to Digital Audio AMP guide on Item 5-2. If AMP is damaged, replace it with a new one Service hint (Any picture / Remark) IC603 AK5358 MIG_SIG IC605 S4308 MIC Board MIC IN DAC_MCLK MIC_DATA IC501 MLC9800 DAC_BCK DAC_LRCK IC602 PS9850 PWM AMP IC TAS5631 DAC_DATA DAC_MCLK IC801 FS502B BEAT BOX BEAT_DATA < MIC IN function signal flow > < Signal check point > 3-28

56 ELECTRICAL TROUBLESHOOTING GUIDE 1. POWER SUPPLY ON SMPS BOARD No output 3.7 / 5.6 VA F901 normal? Replace F901 (same fuse). BD901 normal? Replace BD901. D904 normal? Replace D904. IC934 normal? Replace IC934. D933, D937 normal? Replace D933, D937. Power line of MAIN PCB is short. 3-29

57 ELECTRICAL TROUBLESHOOTING GUIDE No output 12 V F901 normal? Replace F901 (same fuse). BD901 normal? Replace BD901. D904 normal? Replace D904. D934, D935 normal? Replace D934, D935. IC931 normal? Replace IC931. Power Line of Main PCB is short. 3-30

58 ELECTRICAL TROUBLESHOOTING GUIDE No output FL+/FL- P-CTRL OK? Check 3.3 V Output & P-CTRL. D931, D932 OK? ZD931 OK? Replace D931, D932. Replace ZD931. FR931 short? Replace FR931. Check soldering of PN

59 ELECTRICAL TROUBLESHOOTING GUIDE No AMP Output Is the VCC supplied to IC911 Pin7? P-CTRL OK? Check 3.3V & P-CTRL. Q901,D904 OK? Replace D914/ Q900/ PC901. ZD912, ZD913 OK? Replace ZD912, ZD913. D951, D952 OK? Replace D951, D952. Check soldering of CN

60 2. SYSTEM PART ELECTRICAL TROUBLESHOOTING GUIDE Power on. HELO Display on FLD OK? CN301 cable connection OK? Check FFC cable (Pin29). CN301 Pin27, 28, 29 power OK? Check SMPS board. CN301 Pin20, 21, 22 data signal OK? Check MAIN board. Q301, 303, 304 grid voltage OK? Replace DIG301. Volume LED (LD302~LD322) Turn on? CN301 Pin V OK? Check SMPS board. CN301 Pin7, 9, 12 I2C data OK? Check MAIN board. Replace LED (LD302 ~ LD322). When turn the volume, count is change? CN301 Pin13, 14 signal OK? Check FFC cable. FRONT board OK. Check MAIN board. 3-33

61 3. AUDIO PART ELECTRICAL TROUBLESHOOTING GUIDE CD FUNCTION Can disc insert? LOAD +- ok? Is motor_open/ close OK? (IC408 Pin9,10) Check IC301. Is motor impedance about 12 Ω? Check Loading motor. Check IC408. Disc reading OK? OPU driving (Focusing & Tracking) OK? Focusing/ Tracking/ Sled Signal OK? IC501 Pin100,101,102 I2S input signal OK? Check OPU. (Pick-up module) PD(CN404 Pin5) about 180 mv? IC407 Pin34,35,36 I2S output signal OK? IC407 RF & Servo signal OK? Check FFC cable to CN404, CN405. IC501 Pin100,101,102 I2S input signal OK? Check IC501. A 3-34

62 ELECTRICAL TROUBLESHOOTING GUIDE USB play IC501 Pin116,117 USB_D output signal OK? Check IC501. When insert USB,IC502 Pin1,2,3,4 USB_D signal OK? IC3U01 USB power +5 V OK? Replace IC3U01. A AUX IC202 Pin7,8 AUX input signal OK? IC202 Pin42,43,44 I2S input signal OK? IC202 Pin41 ADC data output signal OK? Check audio cable. Check IC501. Replace IC202. A 3-35

63 ELECTRICAL TROUBLESHOOTING GUIDE POT. IN IC202 Pin21,22 POT. IN input signal OK? IC202 Pin42,43,44 I2S input signal OK? IC202 Pin41 ADC data output signal OK? Check USB board. Check IC501. Replace IC202. A ipod IC202 Pin25,26 ipod input signal OK? IC203 Pin4 USB_VBUS 5 V OK? Check USB_VBUS of IC203. IC202 Pin42,43,44 I2S input signal OK? Check IC501. IC202 Pin41 ADC data output signal OK? Replace IC202. A 3-36

64 ELECTRICAL TROUBLESHOOTING GUIDE TUNER IC202 Pin21,22 TUNER_L/R input signal OK? TU101 TUNER_L/R output signal OK? Check +3.3 V of TU101. IC202 Pin42,43,44 I2S input signal OK? Check IC501. IC202 Pin41 ADC data output signal OK? Replace IC202. A 3-37

65 ELECTRICAL TROUBLESHOOTING GUIDE A IC501 Pin83,87,88 I2S data output signal OK? IC507 Pin2,17 DAC_BCK/LRCK input signal OK? IC507 Pin7,14 BEAT_LRCK/BCK output signal OK? IC501 Pin83 BEAT_DAC_DATA output signal OK? IC501 Pin83 BEAT_DAC_DATA output signal OK? IC801 I2S input signal OK? IC801 BEAT_DATA output signal OK? Replace IC501. Check IC507. Replace IC507. Check IC501. Check IC501. Check IC501. Check IC801. B 3-38

66 ELECTRICAL TROUBLESHOOTING GUIDE 4. DIGITAL AUDIO AMP CHECK B IC602 I2S input signal OK? Check IC801 & IC501. IC602 PWM data output signal OK? Replace IC602. IC701 FL±/FR± input signal OK? IC702 SW1±/SW2± input signal OK? IC703 RL±/RR± input signal OK? Check IC602. Check IC VA, +48 V Power voltage OK? Check SMPS. IC701 SPK_FL±/FR± output OK? IC702 SPK_SW output OK? IC703 SPK_RL±/RR± output OK? Replace IC701. Replace IC702. Replace IC703. Check L701, L702, L704, L705. Check L708, L709, L710. Check L711, L714, L715, L717. Check speaker cable connection. OK 3-39

67 WAVEFORMS 1. WAVEFORM OF SP- & SP+ FOR DRIVING SPINDLE MOTOR 2. WAVEFORM OF SL- / SL+ FOR DRIVING SLED MOTOR 3. WAVEFORM OF TUR_M+ & TUR_ M- FOR DRIVING TRAY MOTOR 4. WAVEFORM OF LO- & LO+ FOR DRIV- ING PICKUP MODULE UP/DOWN MOTOR 3-40

68 5. WAVEFORM OF RF SERVO 6. WAVEFORM OF I2S SIGNAL TO BEAT BOX IC (IC801) 7. WAVEFORM OF BEAT BOX IC'S POWER SEQUENCE 8. WAVEFORM OF VFD GRID CUR- RENT DRIVER 3-41

69 9. WAVEFORM OF USB_D± 3-42

70 WIRING DIAGRAM 16P 18P 14P 15P 10P 15P 25P 29P

71 BLOCK DIAGRAMS 1. OVERALL BLOCK DIAGRAM P/UP M SLED SPIN LOAD A,B,C,D,E,F PD LD IC408 S3053 Motor Drive SPDO/SLDO/FOD/TRD MOT_MUTE/CLOSE/OPEN CD_RST IC407 BU9543KV RF+ SERVO DSP CD_DIN_DOUT SUBSYQ; BUSY; CD_16M CD_R/W CD_MCK/BCK /LRCK/DATA USB_D USB1 USB_RESET/SCL/SDA CP_RESET/SCL/SDA USB2 USB HUB USB2512B IC504 CP for IPOD ipod IPO AUDIO L/R TUR_M IC502 SDRAM IC503 FLASH REMOCON/KEY/ OPEN/CLOSE/LIMIT/UPDN/D_SENSE IC406 S8082 M00_15/A00_16 TUR DRM_WEN/CAS/RAS/SEL/CLK/CKE SF_DI/DO SF_CS/SCK MICOM_CS/DO/DI/ CLK/MAIN_RESET IC501 MLC9800 MCS LOGIC LBT_DATA LBT_CLK IPOD_PCTRL/RX/TX/DET/READAY ADC_EDID_PWM_DATA/CLK DAC_MCLK ADC_DATA DAC_BCK/LRCK IC200 CS5346 TUNER_SCLK/SDIO/RST/GPIO2/SEN AMP_OTW/SD/CLIP/READY AMP_PDN IPO L/R POT_L/R AUX_L/R IC251 NJM2794 TUNER_L/R TU101 TUNER POT. IN AUX VFD DIG301 IC100 EEPROM CLK/DATA VFD_STB/CLK/DO/RST IC101 MICOM LC87F085 LBT_RX/TX/RST SPEANA IC801 FS503B BEAT BOX LBT_DATA LBT_BCK /LBT_LRCK IC602 PS9850 PWM FL FR RL RR IC701 AMP IC TAS5631 IC702 AMP IC TAS5631 F/L F/R R/L R/R 300Wx2 150Wx2 MIC IC501 S4308 MIC_SIG IC603 AK5358 SDOUT1 SW1 SW2 IC702 AMP IC TAS5631 SW1 SW2 300Wx2 AUDIO OUT AUDIO OUT_L/R DRV

72 2. SMPS BLOCK DIAGRAM STR-A6252 for Main Power MAIN TRANS Rectifier Circuit (Bridge, CAPACITOR) Filter Section (Varistor, Resistor, Line Filter Thermistor) Snubber FL FR AC AMP Power & UC3844 for Main Power FET TRANS MAIN & AMP Digital Power AMP SW C SL SR

73 3. POWER BLOCK DIAGRAM SMPS +12V +3.7VA +5.6V IC605 MIC AMP S4308 D101 D102 D104 IC601 LDO TJ3965D IC P33 IC203 IPOD PWR LM39102D IC201 IPOD AMP NJM2794 IC100 EEPROM 24CS16 IC102 RESET KIA V SPEANA Q601 IC101 U_COM +3.3V IC603 ADC(MIC) AK5358A IC5058 TJ3965D 12VA IC604 DRV603 IC701/702/703 POW AMP TAS5631 TU101 TUNER YST V(CD) IC103 PWR SENS VCC33 FRONT LED 9EA x 2 IC602 PWM PS9850 DIG301 VFD D301 VOLUME LED 9EA RMC301 REMOCON D302 WOOFER EXTENDERx2 +3.3V(CD) +3.3V(RF) +3.3V(USB) FAN Q701 IC509 KIA1112F IC501 MCS MLC9800 IC502 SDRAM EM IC506 CP2.0B Q405 IC407 RF BU9543KV Q406 IC504 USB HUB USB2512A VCC12 IC503 FLASH MX25L8005 IC507 74AHC244 IC401 TJ3965D +1.8V FL +48V DIG301 IC3U01 USB PWR LM39102D IC701/702/703 AUDIO AMP TAS5631 ADC IC202 CS5346 IC408 MOTOR AM3053S IC406 MOTOR S V(ADC) IC806 74AHC244 IC807 74AHC V(BEAT) IC801 BEAT BOX FS-503B IC803 BOOT FLASH 16MB IC805 BEAT SOURCE FLASH 32MB VCC12A IC802 TJ3965D

74 CIRCUIT DIAGRAMS 1. SMPS CIRCUIT DIAGRAM 12 IMPORTANT SAFETY TICE WHEN SERVICING THIS CHASSIS, UNDER CIRCUMSTANCES SHOULD THE ORIGINAL DESIGN BE MODIFIED OR ALTERED WITHOUT PERMISSION FROM THE LG CORPORATION. ALL COMPONENTS SHOULD BE REPLACED ONLY WITH TYPES IDENTICAL TO THOSE IN THE ORIGINAL CIRCUIT. SPECIAL COMPONENTS ARE SHADED ON THE SCHEMATIC FOR EASY IDENTIFICATION. THIS CIRCUIT DIAGRAM MAY OCCASIONALLY DIFFER FROM THE ACTUAL CIRCUIT USED. THIS WAY, IMPLEMENTATION OF THE LATEST SAFETY AND PERFORMANCE IMPROVEMENT CHANGES INTO THE SET IS T DELAYED UNTIL THE NEW SERVICE LITERATURE IS PRINTED. TE : 1. Shaded( ) parts are critical for safety. Replace only with specified part number. 2. Voltages are DC-measured with a digital voltmeter during Play mode A CAUTION: Danger if fuse is incorrectly replaced. Replace only with the type identical to fuse rating and(or) model name described in main label. Warning Parts that are shaded are critical with respect to risk of fire or electrical shock. B C D E F G H I J K L M N O P Q R S T SMPS EBY Rev

75 2. MICOM CIRCUIT DIAGRAM A µ-com EBY (#1) Rev B C D E F G H I J K L M N O P Q R S T

76 3. PWM CIRCUIT DIAGRAM A PWM EBY (#2) Rev B C D E F G H I J K L M N O P Q R S T

77 4. AMP CIRCUIT DIAGRAM A AMP EBY (#3) Rev B C D E F G H I J K L M N O P Q R S T

78 5. DSP CIRCUIT DIAGRAM A DSP EBY (#4) Rev B C D E F G H I J K L M N O P Q R S T

79 6. RF SERVO CIRCUIT DIAGRAM A RF SERVO EBY (#5) Rev B C D E F G H I J K L M N O P Q R S T

80 7. ADC CIRCUIT DIAGRAM A ADC EBY (#6) Rev B C D E F G H I J K L M N O P Q R S T

81 8. BEAT BOX CIRCUIT DIAGRAM A BEAT BOX EBY (#7) Rev B C D E F G H I J K L M N O P Q R S T

82 9. VFD CIRCUIT DIAGRAM A B C D E F G H I J K L M N O P Q R S T VFD EBY Rev

83 10. VOLUME CIRCUIT DIAGRAM A VOLUME EBY Rev B C D E F G H I J K L M N O P Q R S T

84 11. USB CIRCUIT DIAGRAM A B C D E F G H I J K L M N O P Q R S T USB EBY Rev

85 12. IPOD CIRCUIT DIAGRAM A B C D E F G H I J K L M N O P Q R S T IPOD EBY Rev

86 13. MIC CIRCUIT DIAGRAM (OPTIONAL PART) A B C D E F G H I J K L M N O P Q R S T MIC EBY Rev

87 CIRCUIT VOLTAGE CHART 1. HOW TO CHECK THE VOLTAGE Turn the SMPS board over with cable connected and check the voltage. No. Location / Description Supply Voltage Pin No. Source Spec / Rating Measured voltage 8 IC701 TAS5631 PVDD_X 48V 25~52.5V 47.7V GVDD_X 12V 10.8~13.2V 11.91V VDD 12V 10.8~13.2V 11.91V 9 IC502 EM638165TS-6G VDD,VDDQ 3.3V 3.0~3.6V 3.27V 10 IC503 M25L1605D2I-12G VDD 3.3V 4.6V MAX 3.27V 11 IC507 TC74VHC244FT VCC 3.3V 2.0~5.5V 3.27V 12 IC506 CP Chip VCC 3.3V 7.0V MAX 3.27V 13 IC504 USB2512A VDD33 3.3V 3.0~3.6V 3.26V 2. MAJOR ICs 14 IC R33 VOUT 3.3V V No. 1 Location / Description IC501 MLC9800 Supply Voltage Pin No. Source Spec / Rating Measured voltage 13,47,94-VDD12 1.2V 1.08~1.32V 1.18V 30,51,84,113- IOVDD33 3.3V 3.0~3.6V 3.26V 120-PLL1VDD12 1.2V 1.08~1.32V 1.18V 124-PLL2VDD12 1.2V 1.08~1.32V 1.18V 122-PLL3VDD12 1.2V 1.08~1.32V 1.18V 115-USBVDD33 3.3V 3.0~3.6V 3.26V 14,48,95-VSS12 3.3V 3.0~3.6V 3.26V 3,52,85,109,114- IOVSS33 1.2V 1.08~1.32V 1.18V 119-PLL1VSS12 3.3V 3.0~3.6V 3.26V 123-PLL2VSS12 1.2V 1.08~1.32V 1.18V 121-PLL3VSS12 1.2V 1.08~1.32V 1.18V IC407 BU9543KV IC408 S3053 IC406 S8082 IC202 CS5346 IC203 LM39102D IC201 NJM2794RB2 IC204 LM39102D VDD 3.3V 2.7~3.6V 3.27V VCORE 1.5V 1.4~1.65V 1.58V VCC1, VCC2 5V 4.3~13.2V 5.10V SVCC, PVCC 5V 4.3~13.2V 5.10V VA 5V 4.75~5.25V 5.11V VD 3.3V 3.13~3.47V 3.27V VLS 3.3V 3.13~3.47V 3.27V VLC 3.3V 3.13~3.47V 3.27V VOUT 5V V VCC 12V 4.3~13V 11.93V VOUT 5V V 3-AVSS33 3.3V 3.0~3.6V 3.26V 118- USBVSS33 3.3V 3.0~3.6V 3.26V 22 IC801 FS-503B VDDK 1.2V 1.4V MAX 1.19V VDDE 3.3V 4.0V MAX 3.27V 2 IC101 LC87F085NC8A VDD1,VDD2, VDD3,VDD4 3.3V 2.8~5.5V 3.37V 23 IC803 M25L1605D2I-12G VDD 3.3V 4.6V MAX 3.27V 3 IC100 S-24CS16 VCC 3.3V 2.7~5.5V 3.37V 24 IC806 TC74VHC244FT VCC 3.3V 2.0~5.5V 3.27V IC602 PS9850 IC603 AK5358 IC605 S4308 IC604 DRV603 VDD_IO 3.3V 2.97~3.63V 3.31V VDD_CORE 1.2V 1.08~1.32V 1.25V VDD_VIN1 3.3V 2.20~3.30V 3.30V VDD_VIN2 3.3V 2.20~3.30V 3.30V VDD_A 1.2V 1.08~ V VA 5V 6.0V MAX 5.11V VD 3.3V 4.6V MAX 3.31V VCC 12V 4.5~12V 11.25V VDD 5V 3~5.5V 5.1V IC807 M25L1605D2I-12G IC807 TC74VHC244FT IC807 KIA1112F IC301 BU2090 IC302 BU2090 IC3U01 LM3912D VDD 3.3V 4.6V MAX 3.27V VCC 5V 2.0~5.5V 5.12V VOUT 1.2V V VDD 3.3V 7.0V MAX 3.66V VDD 3.3V 7.0V MAX 3.66V VOUT 5V V