BELSON (2 W remote) MICRO COMPONENT SYSTEM
MODEL CAUTION: Before servicing the chassis, read the " important service safety information" section on page 2 of this manual. MICRO HI-FI STEREO RADIO WITH CD PLAYER SPECIFICATIONS AM/FM TUNER SECTION CONTENTS IMPORTANT SERVICE SAFETY INFORMATION------2 ANTENNA SYSTEM TUNING RANGE AUDIO SECTION AM : FERRITE BAR FM : AERIAL PIGTAIL ANT. AM : 530-1600 khz FM : 88-108 MHz ADJUSTMENT LOCATION--------------------------3 DISASSEMBLY INSTRUCTION----------------------4 ALIGNMENT PROCEDURES----------------------5-6 VOLTAGE CHARTS--------------------------------7 IC BLOCK DIAGRAMS-------------------------8-12 SPEAKER IMPEDANCE : 4 OHM GENERAL : 2 W x 2 BLOCK DIAGRAM--------------------------------13 WIRING DIAGRAM------------------------------14 POWER INPUT : AC 230 V, ~ 50Hz PRINTED CIRCUIT BOARDS-------------------15-16 AC POWER CONSUMPTION SCHEMATIC DIAGRAMS-----------------------17-20 DIMENSIONS : (136W)x(240D)x(146H)mm EXPLODED VIEW/PARTS LIST (CABINET)------21-23
IMPORTANT SERVICE SAFETY INFORMATION 1.SAFETY PRECAUTIONS Before returning a unit to the customer, always make a safety check of the Entire unit, including, but not limited to the following items: a. Be sure that no built-in protective devices are defective and/or have been defeated during servicing. (1) protective shields are provided to protect both the technician and the customer. Correctly replace all missing protective shields including any removed for servicing convenience. (2) when reinstalling the chassis and/or other assemblies in the cabinet, be sure to put back in place all protective devices, including, but not limited to, nonmetallic control knobs, insulating fishpapers. adjustment and compartment covers/shields and isolating resistor/ capacitor networks. Do not operate this or permit it to be operated Without all protective devices correctly installed and functioning. b. Be sure that there are no cabinet openings through which an adult or child might be able to insert their fingers and contact a hazardous voltage. Such openings include, but are not limited to, excessively wide cabinet ventilation slots, and an improperly fitted and/or incorrectly secured cabinet back cover. Leakage current hot check - with the unit completely reassembled,plug the AC line cord directly into a 120V AC outlet. (Do not use an isolation transformer During this test.) Use a leakage current tester or a metering system that complies with American National standards Institute (ANSI) C101.1Leakage Current for Appliances and Underwriters Laboratories(UL) 1410 (50.7). WITH THE UNITAC switch first in the ON position And then in the OFF position, measure from a known earth ground (metal water pipe, conduit, etc.) To all exposed metal parts of the Unit (antennas, handle bracket, metal cabinet, screw heads, metallic overlays, control shaft, etc.) Especially any exposed metal parts that offer an electrical return path to the chassis. Any current measured must not exceed 0.5 milliamp, reverse the unit power cord plug in the outlet and repeat test. ANY MEASUREMENTS NOT WITHIN THE LIMITS SPECIFIED HERENING INDICATE A POTENTIAL SHOCK HAZARD THAT MUST BE ELIMINATED RETURNING THE UNIT TO THE CUSTOMER. AC LEAKAGE TEST DEVICE UNDER TEST D. Insulation resistance test cold check unplug the power supply cord and connect a jumper wire between the two prongs of the plug. 2-WIRE CORD ALSO TEST WITH PLUG REVERSED (USING AC ADAPTER PLUG AS REQUIRED) TEST ALL EXPOSED METAL SURFACES Turn on the power switch of the unit. Measure the resistance with an ohmmeter between jumpered AC PLUG AND EACH Exposed metallic cabinet part on the unit, such as screw heads, antenna, control shafts, handle brackets, etc. When the exposed metallic part has a return path to the chassis, the reading should be between 1 and 5.2 megohms. When there is no return path to the chassis, the reading must be infiniteif it is not within the limits specified, there is the possibility of a shock hazard, and the unit must be repaired and rechecked before it is returned to the customer. (READING SHOULD NOT BE ABOVE 0.5mA) LEAKAGE CURRENT TESTER EARTH GROUND ANTENNA TERMINAL EXPOSED METAL PAR T OHMMETER 2. PRODUCT SAFETY NOTICE some electrical and mechanical parts have special safety related characteristics which are often not evident from visual inspection. Nor can the protection they give necessarily be obtained by replacing them with components rated for higher voltage, wattage, etc. Parts that have special safety characteristics are identified by a on schematic and parts list. Use of a substitute replacement that dose not have the same safety characteristics as the recommended replacement part might create shock, fire, and/or other hazards. Product safety is under review continuously and new instructions are issued whenever Appropriate. 3. Servicing precautions caution: before servicing the unit covered by this service by this service manual and its supplements. Read and follow the SAFETY PRECAUTIONS on this page. NOTE: if unforeseen circumstances create a conflict between the following servicing precautions and any of the safety precautions, always follow the safety precautions. Remember: safety first. General servicing precautions. A. Always unplug the units AC power cord from the AC power source Before: (1) removing or reinstalling any component, circuit board, module or any other unit assembly. (2) disconnecting or reconnecting any unit electrical plug or other Electrical connection. (3) connecting a test substitute in parallel with an electrical capacitor caution: a wrong part substitution or incorrect polarity installation Of electrolytic capacitors may result in an explosion hazard. B. Do not defeat any plug/socket b+ voltage interlocks with which the unit covered by this service manual might be equipped. C. Do not apply AC power to this unit and/or any its electrical assemblies unless all solid-state device heat sinks are correctly installed. D. Always connect a test unit instruments ground lead to the units chassis ground before connecting the test instruments positive lead always remove the test instruments ground lead last. 4. Laser precautions warning! 1. When servicing.(in case it is necessary to confirm laser beam emission ) be sure not to place your eyes any closer than 1 or 30cm from the surface of the objective lens on the Optical pickup block. HANDLING THE LASER PICKUP 2. Laser Diodes are Extremely Susceptible to damage from static electricity even if a static discharge dies not ruin the diode, it can shorten its life or cause it to work improperly. When replacing the pickup, use a conductive mat on the floor and desk and wear a wrist band connected to ground through a 1M ohm resistor to protect the laser diode from static damage. If the lens should get dusty, blow off the dust carefully from the object. 3. There are no adjustable parts in the pickup assembly. If it is defective, replace the whole pickup assembly. CAUTION: USE OF CONTROLS, ADJUSTMENTS OR PERFORMANCE OF PROCEDURES HEREIN MAY RESULT IN HAZARDOUS RADIATION EXPOSURE. DANGER: IF INTERLOCK FAILS OR IS DEFEATED, THE LASER LIGHT IS ABLE TO FUNCTION. THE LASER IS INVISIBLE, AVOID DIRECT EXPOSURE TO BEAM. OM 2
MODEL : DISASSEMBLY INSTRUCTIONS 3x12KA 3x12KA 3x10PA
ADJUSTMENT LOCATION
ALIGNMENT PROCEDURE ALIGNMENT INSTRUCTION FM & FM STEREO SECTION NE -291/MW/FM/FM.ST IC-TA2111N DATE: 2002-05-10 STEP ALIGN TEST EQUIPMENT SIGNAL IN SIGNAL OUT ALIGNMENT REMARK FREQ 1 10.7MHz (1) FM IF SWEEP THROUGH A TP4 & TP5 ADJUST T203 FOR PVC AT HIGH END GENESCOPE 100PF AND GND MAX.OUTPUT & (2) POWER SUPPLY CAPACITOR LINEARITY AND 'S' TO TP2& GND CURVE BALANCE AROUND 10.7MHz 2 87.35MHz FM SIGNAL TP1& GND TP4 & TP5 ADJUST L202 FOR PVC AT LOW END GENERATOR MOD AND GND 87.35MHz FREQ 22.5KHz/1KHz 3 108.5MHz SAME AS STEP 2 SAME AS SAME AS ADJUST PVC FC2 PVC AT HIGH END STEP 2 STEP 2 FOR 108.5MHz FREQ 4 REPEAT 2,3 FOR BEST RESULTS 5 90MHz SAME AS STEP 2 SAME AS SAME AS ADJUST L201 FOR TUN PVC TO STEP 2 STEP 2 MAX OUTPUT RECEIVE SIGNAL 6 106MHz SAME AS STEP 2 SAME AS SAME AS ADJUST PVC FC1 SAME AS STEP 2 STEP 2 FOR MAX OUTPUT STEP 5 7 REPEAT5, 6 AND THEN REPEAT 2,3,5,6 FOR BEST RESULTS 8 98MHz 1.FM SIGNAL SAME AS STEP2 CHECK WHETHER FM STEREO GENERATOR TP7 & TP8 THE STEREO LED ON POSITION SEV 75KHZ AND GND MUST BE ON 1KHZ W/STEREO VCO FREQ:76KHz 2. 2-CH.V.T.V.M 3. OSCILLOSCOPE 4. DC POWER SUPPLY
ALIGNMENT PROCEDURE ALIGMENT INSTRUCTIONS MW SECTION STEP ALIGN TEST EQUIPMENT SIGNAL IN SIGNAL OUT ALIGNMENT REMARK FREQ 465KHz (1)AM IF SWEEP MW ANT. COIL TP4 & TP5 ADJUST T202 (1)MW POSITION 1 &455KHz GENSCOPE CLOSE TO AND GND FOR MAX OUTPUT (2)PVC AT HIGH (2)LOOP ANT LOOP ANT. AROUND 465 KHz & END (3)POWER SUPPLY 455KHz 520KHz (1)LOOP ANT. RADIATE 60CM TP4 & TP5 ADJUST L205 FOR (1)MW POSITION 2 (2) AM SIGNAL APART FROM AND GND 520KHz (2)PVC AT LOW GENERATOR TEST UNIT MOD.1KHz 30% 1620KHz SAME AS STEP 2 SAME AS SAME AS ADJUST PVC C2 (1)MW POSITION 3 STEP 2 STEP 2 1620KHz (2)PVC AT HIGH END 4 REPEAT 2,3 FOR BEST 5 600KHz SAME AS STEP2 SAME AS SAME AS ADJUST L2 FOR (1)MW POSITION STEP 2 STEP 2 MAX OUTPUT (2)TUNE PRC TO RECEIVE SIGNAL 6 1400KHz SAME AS STEP 2 SAME AS SAME AS ADJUST PVC C1 SAME AS STEP 2 STEP 2 FOR MAX OUTPUT ABOVE 7 REPEAT 5,6, AND THAN REPEAT 2,3,5.6 FOR BEST RESULTS
VOLTAGE CHARTS IC VOLTAGE TABLE {NO SIGNAL INPUT (EXCEPT FM STEREO BAND),VOLUME MINMUN} MODEL : NE-291(2-3W-REM) IC306 PINS 1 2 3 4 5 6 7 8 9 10 11 12 TA8227P 16 8 0 0 0.5 0 0 0.5 8 15 8 16 IC 304 PINS 1 2 3 4 5 6 7 8 9 10 11 12 13 14 TC4013BP 6.2 0 0 0 0 0 0 0 6.5 0 0 6.5 0 6.5 IC202 PINS 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 TA2111P FM 0.8 0 0.3 6 0 6.1 5.6 5.9 0 0 4.6 5.4 1.3 1.3 5.4 5.3 0.7 0.9 0.3 6.1 6.1 6.6 6.1 6.1 AM 0 0 1.1 6.8 0.5 6.6 6.1 6.8 0 0 5.3 6.3 1.3 1.3 6.1 6.8 0.7 1.4 1.4 6.8 6.8 6.8 6.8 6.8 PINS 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 U201 8 0 2.5 2.5 3.6 3.6 0 0 0 3.5 3.5 2.5 2.5 5 7.3 LA6541D PINS 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 8 4.8 2.5 2.5 3.5 3.5 0 0 0 3.6 3.6 2.5 2.5 2.5 8 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 2.9 0.9 2.7 2.7 2.6 2.6 2.6 2.7 0 2.7 2.7 2.7 2.7 2.7 2.7 0 U101 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 2.7 2.7 2.7 2.7 2.7 2.7 2.7 2.7 2.7 2.7 2.7 2.7 2.5 2.5 1.6 0 LA9242M 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 0 0 0 0 0 0 0 2.7 5 5 0 0 2.7 0 0 2.7 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 0 2.4 0 0 0 2.7 0 5 5 2.7 2.7 0 0 2.7 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 U301 0 0 0.2 1.1 5 2 0 2.5 2.4 0 2.6 2.6 0 0 0 5 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 5 2.6 0 0 0 4 0 0 0 0 0 5 2.5 0 5 5 LC78601RE 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 2.9 2.8 2.9 0.9 0.9 0 0 2.8 2.8 5 5 0 0.1 0.1 0 0 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 5 0 0 0 0 2 2 4 0 2 0 0 2.5 5 5 0 PINS 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 IC2 2.1 2.1 2.1 2.1 2.1 2.8 2.3 2.1 2.6 2.4 2.4 2.4 2.4 2.6 1.8 1.8 0.5 1 SC3610 PINS 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 0 1.5 4.6 4.6 4.6 4.6 4.6 4.3 0 0 0 0 0 0 3.3 0 1.6 5.2 IC 302 PINS 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 PT2249 0 0 0 0 0 0 0 0 0 0 0 0 0 0 3.1 6.2 IC 305 PINS 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 PT2253A 0 3.3 3.3 3.3 0 0 6.6 6.6 6.6 6.6 3.3 0 3.3 3.3 3.3 6.6 Q303 E B C Q304 E B C Q306 E B C Q219 E B C 9014 0.7 1.4 0.9 9014 6.2 6.8 14 A928 17 16 17 8050 8 0.1 7.9
IC BLOCK DIAGRAM
IC BLOCK DIAGRAM TA2111N
IC BLOCK DIAGRAM TA8227P LC78601RE
C.E.C BELSON/DPTO.TECNICO/MOD:/Ed.01 IC BLOCK DIAGRAM LA6541D
IC BLOCK DIAGRAM LA9242M
BLOCK DIAGRAM
WIRING DIAGRAM
PRINTED CIRCUIT BOARTD
PRINTED CIRCUIT BOARTD
SCHEMATIC DIAGRAM
SCHEMATIC DIAGRAM
SCHEMATIC DIAGRAM
mexploded VIEW/PARTS LIST NO. PART DESCRIPTION QTY NO. PART DESCRIPTION QTY 1 353-029100-2490 DECORATION RING CHROME 1 42 202-028903-01 CD OPEN BUTTON SPRING 1 2 335-028812-8981 DISPLAY LENS 1 43 408-028908-2500 DOOR OPEN BUTTON SPR 1 3 400-029100-2490 TUNING KNOB CHROME 1 44 188-011511-01 TACT SWITCH 1102-2 2 4 311-029100-6500 FRONT CAB. 1 45 202-028902-01 CD DOOR SPRING 1 5 202-000040-01 EAR HEADPHONE PCB PRESS PLATE 1 46 371-028930-6500 CD DOOR REV.3 SPR 1 6 303-000090-0101 MOUNTING POST 4 47 208-028900-60 CD DOOR LENS STD 1 7 403-028904-8JX0 POWER/STANDBY BUT. 1 48 322-028900-53J0 REAR CABINET 1 8 472-029109-1010 MUTE BUTTON 1 9 403-029109-2490 MUTE BUTTON CHROME 1 10 464-02891B-1C20 SHAFT BUSHING 1 11 464-028923-1C20 TUNING SHAFT 1 12 408-028106-2490 PROGRAM BUT CHROME 1 13 408-029105-2490 REPEAT BUT CHROME 1 14 408-029103-2490 STOP BUTTON CHROME 1 15 408-029102-2490 PLAY BUTTON CHROME 1 P1 173-029907-01 HEADPHONE JACK BOARD 1 16 408-029104-2490 SKIP BUTTON CHROME 1 P2 173-029903-01 A/F ST RADIO BOARD 1 17 472-029101-1010 FUNCTION BUT BASE 1 P3 173-029906-01 REMOTE SENSOR BOARD 1 18 472-029106-1010 SKIP BUTTON BASE 1 P4 173-029904-01 CPU+LCD+KEY BOARD 1 19 134-029930-05 LCD 93435TT-P 1 P5 173-029905-01 BACK LIGHT BOARD 1 20 234-028900-01 DRAFTING FILM 1 P6 173-028910-0101 CD+2W AUDIO AF 1 21 461-028902-1100 LCD BRACKET 1 P7 173-028902-0101 FUNCTION SWITCH 1 22 315-000015-01200 AC CORD COVER 1 23 303-000060-0100 DUAL VOLTAGE COVER 1 24 185-122110-01 DUAL VOLTAGE 1 25 188-111702-08 AC POWER SWITCH 1 26 117-109500-01 COAXIAC FM ANT JACK 1 27 303-000010-0000 AC POWER SW COVER 1 28 156-472313-71 X FORMER N48133BF AF PT 1 S1 203-301720-06 TAPPING SCREW 4 29 213-000005-16 CUSHION BUBBER 4 S2 204-260000-05 MACHINE SCREW 1 30 219-DA11B3-N1 CD MECHANISM VERTICAL 1 S3 203-260200-08 TAPPING SCREW 3 31 303-000072-0001 DUST COVER 1 S4 203-260200-10 TAPPING SCREW 12 32 462-02890V-1C20 VOL.BUT.HOLDER 1 S5 207-261600-10 TAPPING SCREW 4 33 460-028900-1C20 VC GEAR 1 S6 203-300800-18 TAPPING SCREW 2 34 460-028914-1C20 TUNING GEA 1 S7 203-300800-12 TAPPING SCREW 1 35 403-028902-2500 VOLUME BUTTON SPR 1 S8 203-300900-10 TAPPING SCREW 4 36 466-028900-1C20 CD DOOR HOOK 1 S9 203-300200-10 TAPPING SCREW 7 37 461-02890A -1C20 MOUNTING BRACKET 2 S10 203-300700-12 TAPPING SCREW 8 38 316-028920-6500 TOP CABINET 1 S11 203-200200-12 TAPPING SCREW 2 39 401-028900-2500 SLIKE DBOB SPR 2 40 401-028906-2500 BASS KNOB SPR 1 41 199-000002-12 OIL DAMPER 1
EXPLODED VIEW/PARTS LIST