SRF-T615 SERVICE MANUAL FM STEREO/AM PLL SYNTHESIZED RADIO. Tourist Model. Ver SPECIFICATIONS MICROFILM

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1 SRF-T615 SERVICE MANUAL Ver Tourist Model SPECIFICATIONS FM STEREO/AM PLL SYNTHESIZED RADIO MICROFILM

2 TABLE OF CONTENTS Specifications GENERAL Location and Function of Controls DISASSEMBLY 2-1. Cover (JOG) (A) Lid, Battery Case Cabinet (Rear) Main Board ADJUSTMENTS... 5 Flexible Circuit Board Repairing Keep the temperature of the soldering iron around 270 C during repairing. Do not touch the soldering iron on the same conductor of the circuit board (within 3 times). Be careful not to apply force on the conductor when soldering or unsoldering. Notes on chip component replacement Never reuse a disconnected chip component. Notice that the minus side of a tantalum capacitor may be damaged by heat. 4. DIAGRAMS 4-1. Explanation of IC Terminals Block Diagrams Printed Wiring Boards Schematic Diagram EXPLODED VIEW ELECTRICAL PARTS LIST SECTION 1 GENERAL This section is extracted from instruction manual. LOCATION AND FUNCTION OF CONTROLS 2

3 r The equipment can be removed using the following procedure. SECTION 2 DISASSEMBLY Set Cover (JOG) (A) Lid, Battery Case Cabinet (Rear) Main Board Note : Follow the disassembly procedure in the numerical order given COVER (JOG) (A) 1 Screw (B1.7x9) Cover (JOG) (A) 2 Three claws 3 Turn from upper side of the cover (JOG) (A), and remove it LID, BATTERY CASE Lid, battery case Two claws 3

4 2-3. CABINET (REAR) 1 Screw (1.7x9) Cabinet (rear) 2 Claw 2 Two claws 4 Knod (HOLD) 5 Button (MENU) 3 2 Two claws Cabinet (front) ASSY 2 Two claws 2-4. MAIN BOARD Terminal ( ) (A), battery 1 Lead wire (Black) Terminal (+) (A), battery Main board 2 Screws (1.4) 3 Remove solder 4 Brown Black Cabinet (front) ASSY 4

5 SECTION 3 ADJUSTMENTS TUNER SECTION AM Section Band : AM Volume : MIN FM Section AM RF signal generator 30% amplitude modulation by 400Hz signal. Output level : as low as possible Band : FM Volume : MIN FM RF signal generator 0dB = 1µ V Put the lead-wire antenna close to the set µf TP102 (RF IN) MAIN board Repeat the procedures in each adjustment several times, and the frequency coverage and tracking adjustments should be finally done by the trimmer capacitors. AM IF ADJUSTMENT Adjust for a maximum reading on level meter. T kHz AM FREQUENCY COVERAGE ADJUSTMENT Adjust part Frequency display reading on digital voltmeter. L kHz Adjustment Value : 2.5V Standard Value : V Confirmation 1,710kHz V AM TRACKING ADJUSTMENT Adjust for a maximum reading on level meter. L kHz CT101 1,485kHz FM FREQUENCY COVERAGE CONFIRMATION Adjust part Frequency display reading on digital voltmeter. Confirmation 76.0MHz V Confirmation 108.0MHz V 22.5kHz frequency deviation by 400Hz signal. Output level : as low as possible set 16 Ω level meter + FM TRACKING ADJUSTMENT Adjust for a maximum reading on level meter. L MHz CT MHz Headphone jack (J301) Frequency Coverage Adjustment Connect Location : [MAIN BOARD] (SIDE B) C603 R541 ECB ECB C504 Q504 Q503 Q602 R603 C608 E C B C605 R607 C206 C207 C301 D R533 D501 R201 C204 R542 C314 RV201 Q202 R116 X501 C311 C C IC301 5 C307 R R309 1 C312 C313 C201 BCE Q201 CF102-1 R BCE C131 C Q103 R120 R5 R5 C51 C C124 L106 D104 C17 C309 T101 C120 R k Ω TP102 (RF IN) Digital voltmeter 5

6 FM VCO Adjustment Procedure : FM RF signal generator Carrier frequency : 98MHz Modulation : no modulation Output level : 100dB µv (100mV) 0.01 µf TP102 (RF IN) MAIN board Connect Location : [MAIN BOARD] (SIDE A) C302 R203 C209 C130 C C133 ECB R126 BCE R124 Q104 R123 R R202 C205 C129 IC201 CF101 IC k Ω 1µF frequency counter 1. Connect the frequency counter to 3 to 4 pins of IC201 as shown the figure. 2. Turn the set to 98MHz. 3. Adjust RV201 for 76.0kHz reading on frequency counter. Standard Value : kHz 117 C105 D102 C102 R104 R114 C109 C113 C125 C126 R102 D103 R112 R107 ECB D101 Q102 R111 R110 R105 C104 C110 C C111 R108-3 R109 C103 R103 C107 IC Adjustment Location : [MAIN BOARD] (SIDE B) RV201 : FM VCO Adjustment T101 : AM IF Adjustment IC101 L103 : AM Frequency Coverage Adjustment L101 : FM Tracking Adjustment CT101 : AM Tracking Adjustment L104 : AM Tracking Adjustment CT102 : FM Tracking Adjustment 6

7 SECTION 4 DIAGRAMS 4-1. EXPLANATION OF IC TERMINALS IC502 µpd17073gb-925-9eu (SYSTEM CONTROL, LCD DRIVE) Pin No. Pin name I/O Description 1 DO Not used (OPEN). 2 EEPROM CS Not used (OPEN). 3 TV 4-12CH Not used (OPEN). 4 MUTE O Audio mute signal output. 5 NC Not used (Connect to ground). 6 POWER O Power ON/OFF control output. 7 KS0 O Key source signal output. *1 8 KS1 O Key source signal output. *1 9 KS2 O Key source signal output. *1 10 KS3 O Key source signal output. *1 11 KR0 I Key return signal input. 12 NC Not used (Connect to ground). 13 KR1 I Key return signal input. *1 14 KR2 I Key return signal input. *1 15 KR3 I Key return signal input. *1 16 METER O Meter drive signal output (Not used : OPEN). 17 ST/MONO O Stereo/ Mono control signal output. 18 V DET2 I Voltage decrease detection input. L : less than 2.1V (Change to clock mode). 19 BAND O Band select output. H : AM, L : FM 20 GND Ground terminal. 21 GND Ground terminal. 22 EO O PLL error signal output for PLL LPF. 23 VCOL I VCO input. 24 VCOH Not used (OPEN). 25 REG0 Capacitor connection terminal for LCD drive voltage. 26 VDD Power supply terminal (3V). 27 VDD Power supply terminal (3V). 28 X OUT O System clock output (75kHz). 29 X IN I System clock input (75kHz). 30 REG1 Capacitor connection terminal for LCD drive voltage. 31 LEG LCD0 Capacitor connection terminal for LCD drive voltage. 32 CAP LCD0 Capacitor connection terminal for LCD drive voltage. 33 CAP2 LCD1 Capacitor connection terminal for LCD drive voltage. 34 LEG LCD1 Capacitor connection terminal for LCD drive voltage. 35 COM0 O Common signal output for LCD. 36 COM1 O Common signal output for LCD. 37 COM2 O Common signal output for LCD. 38 NC Not used (Connect to ground). 39 COM3 O Common signal output for LCD. 40 LCD0 O Segment signal output for LCD. 41 LCD1 O Segment signal output for LCD. 42 LCD2 O Segment signal output for LCD. 43 LCD3 O Segment signal output for LCD. 44 LCD4 O Segment signal output for LCD. 45 NC Not used (Connect to ground). 7

8 Pin No. Pin name I/O Description 46 LCD5 O Segment signal output for LCD. 47 LCD6 O Segment signal output for LCD. 48 LCD7 O Segment signal output for LCD. 49 LCD8 O Segment signal output for LCD. 50 LCD9 O Segment signal output for LCD. 51 LCD10 O Segment signal output for LCD. 52 LCD11 O Segment signal output for LCD. 53 LCD12 O Segment signal output for LCD. 54 NC Not used (Connected to ground). 55 LCD13 O Segment signal output for LCD. 56 LCD14 O Segment signal output for LCD. 57 CE I Voltage decrease detection input. L : less than 1.9V (Change to clock mode). 58 INT I Hold switch input terminal. L : Hold 59 NC Not used (Connect to ground). 60 BEEP O Beep signal output. 61 NOISE CUT O Noise filter circuit control signal output. 62 Not used (OPEN) 63 Not used (Fixed at L ) 64 DI Not used. *1 Key matrix KR0 (qa pin) KR1 (qd pin) KR2 (qf pin) KR3 (qg pin) KS0 (7 pin) KS1 (8 pin) KS2 (9 pin) KS3 (q; pin) Preset station <1> POWER ENT/BAND Preset station <5> S502 S503 S504 (JOG) S505 Preset station <4> NOISE CUT TUNE <-> S506 S507 S504 (JOG) Preset station <2> Preset station <6> S508 S509 Preset station <3> MENU TUNE <+> Preset station <7> S510 S511 S504 (JOG) S512 8

9 4-2. BLOCK DIAGRAMS SRF-T615 Signal path. F : FM

10 SRF-T PRINTED WIRING BOARDS r Semiconductor Location Ref. No. Location D101 G-9 D102 G-8 D103 G-9 D104 D-4 D301 C-5 A [MAIN BOARD] (SIDE B) J301 i [MAIN BOARD] (SIDE A) D501 D-2 D601 C-2 D602 C-2 IC101 F-3 IC201 E-9 IC301 E-3 IC501 C-7 IC502 C-8 IC503 D-7 Q102 G-9 Q103 E-3 Q104 E-8 Q105 E-8 Q201 E-3 Q202 E-3 Q301 E-9 Q503 D-3 Q504 D-3 Q601 C-4 Q602 D-2 Q603 C-1 Q604 C-1 Note: X : parts extracted from the component side. r : Through hole. b : Pattern from the side which enables seeing. (The other layers' patterns are not indicated.) Caution: Pattern face side: Parts on the pattern face side seen from the (Side B) pattern face are indicated. Parts face side: Parts on the parts face side seen from the (Side A) parts face are indicated. B C D E F G H 02 S503 POWER S511 MENU R606 R604 C604 BCE ECB Q604 Q603 C607 BAT601 DRY BATTERY SIZE "AAA" (IEC DESIGNATION R03) 2PCS, 3V C606 T601 R605 R602 C601 R601 C602 D602 C603 R541 Q602 R603 S501 HOLD> ONTOFF BAT501 (LITHIUM BATTERY) C608 E C B C605 R607 C206 C207 C122 C114 C301 D601 R533 D501 L103 R542 C314 R201 C204 R116 R115 C RV201 Q L104 AM FERRITE-ROD ANTENNA X501 C312 C201 C131 C C313 C311 BCE Q201-1 R119 IC101 C507 R506 R510 C508 C523 Q103 R120 RV301 VOL C C124 C310 CF CF R113 C116 L102 R125 C115 C112 CT101 CT102 C510 R520 C506 R521 R522 ECB Q601 C521 C519 R531 R536 ECB ECB C504 Q504 Q503 BCE IC301 L105 C511 8 C308 5 C307 R310 1 R309 L101 R504 R509 R517 L R516 C503 D104 R505 C17 R305 R508 R307 R301 C315 R304 C309 T101 R308 C120 L302 S301 TP102 (RF IN) 11 (11) L303 C306 D301 S302 SP401 SPEAKER S301,302 i 5 S507 NOISE CUT S502 1 R306 C305 L301 S508 2 S510 3 S506 4 LCD501 S505 5 S R502 R C501 IC C509 R518 5 R523 R R528 R IC C C502 R534 R IC C505 C512 C TP511 (VT) R538 C524 R539 C525 R540 R511 R530 R537 C513 C514 L501 C304 C303 C517 C515 R311 Q105 R104 ECB R303 R302 R102 C125 R126 Q104 C126 BCE D103 R123 R124 BCE R112 C129 R204 Q301 D101 ECB R107 R108 C302 R203 C130 C C117 C105 D102 C106 C102 R114 C109 C113 R532 C202 C203 C209 C208 IC R202 C205 CF101 6 Q102 R111 R110 R105 C104 C110 C C111-3 R109 C103 R103 C107 ( ) (BAND) (+) S (11) ı S504 ENTER/ BAND

11 4-4. SCHEMATIC DIAGRAM r Refer to page 18 for IC Block Diagrams. SRF-T615 r WAVEFORMS Vp-p 75 khz IC502 wk X OUT VOLT/DIV : 0.5 V AC TIME/DIV : 5 µsec Vp-p 466 nsec T601 VOLT/DIV : 2 V AC TIME/DIV : 0.2 µsec mvp-p 343 nsec Q603 BASE 4 VOLT/DIV : 50 mv AC TIME/DIV : 0.1 µsec 3.5 Vp-p 319 nsec Q603 COLLECTOR VOLT/DIV : 1 V AC TIME/DIV : 0.1 µsec Note: All capacitors are in µf unless otherwise noted. pf: µµf 50 WV or less are not indicated except for electrolytics and tantalums. All resistors are in Ω and 1 /4 W or less unless otherwise specified. U : B+ Line. H : adjustment for repair. Power voltage is dc 3V and fed with regulated dc power supply from battery terminal. Voltages and waveforms are dc with respect to ground under no-signal (detuned) conditions. no mark : FM < > : AM Voltages are taken with a VOM (Input impedance 10 MΩ). Voltage variations may be noted due to normal production tolerances. Waveforms are taken with a oscilloscope. Voltage variations may be noted due to normal production tolerances. Circled numbers refer to waveforms. Signal path. F : FM

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15 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark C CERAMIC CHIP 0.01uF 10% 25V C CERAMIC CHIP 0.01uF 10% 25V C CERAMIC CHIP 0.01uF 10% 25V C CERAMIC CHIP 0.01uF 10% 25V C CERAMIC CHIP 10PF 0.5PF 16V C CERAMIC CHIP 0.1uF 25V C CERAMIC CHIP 1uF 16V C CERAMIC CHIP 10PF 0.5PF 50V C CERAMIC CHIP 1uF 16V C TANTALUM CHIP 10uF 20% 4V C CERAMIC CHIP 0.1uF 25V C CERAMIC CHIP 1uF 10V < FILTER > CF FILTER, CERAMIC(DISCRIMINATOR) CF FILTER, CERAMIC (AM) CF FILTER, CERAMIC < TRIMMER > CT CAP, ADJ (AM TRACKING) CT CAP, ADJ (FM TRACKING) < DIODE > D DIODE KV1563M-3 D DIODE 1T403-M20-T8A D DIODE 1T403-M20-T8A D DIODE MA2S111 D DIODE 1SS226 D DIODE RB521S-30-TE61 D DIODE MA2S111 D DIODE MA8130 < IC > IC IC CXA1111N IC IC LA3335M IC IC CXA1522N IC IC S-80819ANNP-EDG-T2 IC IC upd17073gb-925-9eu IC IC S-80821ANNP-EDJ-T2 LCD < LIQUID CRYSTAL DISPLAY > DISPLAY PANEL, LIQUID CRYSTAL < TRANSISTOR > Q TRANSISTOR 2SC4627J-C(TX).SO Q TRANSISTOR XP1501 Q TRANSISTOR 2SD2216J-R(TX).SO Q TRANSISTOR UN9210J-(TX).SO Q TRANSISTOR UN9213J-(TX).SO Q TRANSISTOR UN9113J-(TX).SO Q TRANSISTOR 2SB1462J-QR(TX).SO Q TRANSISTOR 2SD2216J-R(TX).SO Q TRANSISTOR 2SD2216J-R(TX).SO Q TRANSISTOR UN9210J-(TX).SO Q TRANSISTOR 2SB815B7-TB Q TRANSISTOR 2SD2216J-R(TX).SO Q TRANSISTOR 2SD2216J-R(TX).SO < RESISTOR > R SHORT 0 R RES,CHIP 10K 5% 1/16W R RES,CHIP 100K 5% 1/16W R RES,CHIP 100K 5% 1/16W R RES,CHIP 22K 5% 1/16W R RES,CHIP 1M 5% 1/16W R RES,CHIP 1M 5% 1/16W R RES,CHIP 22K 5% 1/16W R RES,CHIP 220 5% 1/16W R RES,CHIP 220 5% 1/16W R RES,CHIP 220 5% 1/16W R RES,CHIP 10K 5% 1/16W R RES,CHIP 10 5% 1/16W R RES,CHIP 10K 5% 1/16W R RES,CHIP 100K 5% 1/16W R RES,CHIP 47K 5% 1/16W R RES,CHIP 100K 5% 1/16W R RES,CHIP 10K 5% 1/16W R RES,CHIP 1K 5% 1/16W R RES,CHIP 33K 5% 1/16W < JACK > J JACK (i) < COIL > L COIL (WITH CORE) (FM TRACKING) L INDUCTOR 150nH L COIL (AM OSC) (AM FREQUENCY COVERAGE) L ANTENNA, FERRITE-ROD (MW) (AM TRACKING) L INDUCTOR 0.68uH L INDUCTOR 22uH L INDUCTOR 4.7uH L INDUCTOR 4.7uH L INDUCTOR 4.7uH L INDUCTOR 22uH R RES,CHIP 47 5% 1/16W R RES,CHIP 27K 5% 1/16W R RES,CHIP 10K 5% 1/16W R RES,CHIP 10K 5% 1/16W R RES,CHIP 3.3K 5% 1/16W R RES,CHIP 47 5% 1/16W R RES,CHIP 47K 5% 1/16W R RES,CHIP 100K 5% 1/16W R SHORT 0 R RES,CHIP 100 5% 1/16W R RES,CHIP 1K 5% 1/16W R RES,CHIP 100 5% 1/16W R RES,CHIP 47 5% 1/16W R RES,CHIP 47K 5% 1/16W R SHORT 0 R RES,CHIP 10K 5% 1/16W R RES,CHIP 1M 5% 1/16W R RES,CHIP 10K 5% 1/16W 21

16 SRF-T615 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R RES,CHIP 10K 5% 1/16W R RES,CHIP 1M 5% 1/16W R RES,CHIP 10K 5% 1/16W R RES,CHIP 1K 5% 1/16W R RES,CHIP 10K 5% 1/16W R RES,CHIP 10K 5% 1/16W R RES,CHIP 47K 5% 1/16W < TRANSFORMER > T TRANSFORMER, IF (AM) (AM IF) T TRANSFORMER, DC-DC CONVERTER < VIBRATOR > X VIBRATOR, CRYSTAL (75kHz) R RES,CHIP 100K 5% 1/16W R RES,CHIP 1K 5% 1/16W R RES,CHIP 1K 5% 1/16W R RES,CHIP 1K 5% 1/16W R RES,CHIP 1K 5% 1/16W R RES,CHIP 1K 5% 1/16W R RES,CHIP 1K 5% 1/16W R RES,CHIP 1K 5% 1/16W R RES,CHIP 1K 5% 1/16W R RES,CHIP 10 5% 1/16W R RES,CHIP 10K 5% 1/16W R SHORT 0 R RES,CHIP 10K 5% 1/16W R RES,CHIP 1M 5% 1/16W R RES,CHIP 10K 5% 1/16W R RES,CHIP 10K 5% 1/16W R RES,CHIP 4.7K 5% 1/16W R RES,CHIP 10K 5% 1/16W R RES,CHIP 10K 5% 1/16W R RES,CHIP 10K 5% 1/16W ************************************************************** MISCELLANEOUS ************* CONDUCTIVE BOARD, CONNECTION L ANTENNA, FERRITE-ROD (MW) (AM TRACKING) LCD DISPLAY PANEL, LIQUID CRYSTAL SP SPEAKER (2.8cm) ************************************************************** ACCESSORIES & PACKING MATERIALS ******************************* MANUAL, INSTRUCTION (JAPANESE, CHINESE) MANUAL, INSTRUCTION (ENGLISH, KOREAN) RECEIVER,EAR MDR-E805LP X ATTACHMENT R RES,CHIP 100K 5% 1/16W R RES,CHIP 1M 5% 1/16W R RES,CHIP 1K 5% 1/16W R RES,CHIP 47 5% 1/16W R RES,CHIP 2.2K 5% 1/16W R RES,CHIP 220K 5% 1/16W R RES,CHIP 100K 5% 1/16W R RES,CHIP 47K 5% 1/16W R RES,CHIP 1M 5% 1/16W < VARIABLE RESISTOR > RV RES, ADJ, CARBON 10K (FM VCO) RV RES, VAR, CARBON 20K/20K (VOL ) < SWITCH > S SWITCH, SLIDE (5 t i) S SWITCH, SLIDE (5 t i) S SWITCH, SLIDE (HOLD >) S SWITCH, KEY BOARD (1) S SWITCH, TACTILE (POWER) S SWITCH, LEVER SLIDE (JOG)(ENT/BAND) S SWITCH, KEY BOARD (5) S SWITCH, KEY BOARD (4) S SWITCH, KEY BOARD (NOISE CUT) S SWITCH, KEY BOARD (2) S SWITCH, KEY BOARD (6) S SWITCH, KEY BOARD (3) S SWITCH, TACTILE (MENU) S SWITCH, KEY BOARD (7) Sony Corporation Personal Audio Company 22 99J Printed in Japan Published by General Engineering Dept.

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