Sony HCD-EP303, Service Manual

Page 1: ...W per channel minimum RMS power with no more than 10 total harmonic distortion from 250 mW to rated output Canadian model Continuous RMS power output reference 6 6 W 4 Ω at 1 kHz 10 THD European model DIN power output rated 4 5 4 5 W 4 Ω at 1 kHz DIN Continuous RMS power output reference 6 6 W 4 Ω at 1 kHz 10 THD Music power output reference 13 13 W Other model The following measured at AC 230 V o...

Page 2: ...30 W Dimensions w h d Approx 145 240 252 mm Mass Approx 2 9 kg Design and specifications are subject to change without notice 1 SERVICING NOTES 4 2 GENERAL 5 3 DISASSEMBLY 7 3 1 Front Panel Section 7 3 2 MAIN Board 8 3 3 Tape Mechanism Deck TCM125 2 8 3 4 POWER Board Power Transformer 9 3 5 DISPLAY Board HEADPHONE Board 9 3 6 CD Cabinet Section 10 3 7 CD Mechanism Deck CS 21SC 1280 10 3 8 Cassette...

Page 3: ...e damaged by heat Flexible Circuit Board Repairing Keep the temperature of 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 SAFETY CHECK OUT After correcting the original service problem perform the following safety checks before releasi...

Page 4: ...Therefore when checking the laser diode emission observe from more than 30 cm away from the objective lens LASER DIODE AND FOCUS SEARCH OPERATION CHECK 1 Press the 1 button to the power ON with no disc inserted and press the CD button 2 Open the lid for CD 3 Turn on SW600 as following figure 4 Confirm the laser diode emission while observing the objecting lens When there is no emission Auto Power ...

Page 5: ...HABETICAL ORDER A P Cassette compartment qd 12 CD 4 8 9 13 Display Window 5 8 9 10 ENTER PGM 8 9 10 14 MEGA BASS 14 MUSIC MENU 9 14 PHONES jack PRESET 10 11 BUTTON DESCRIPTIONS 1 power 6 CD m M go back go forward 8 9 u play pause 8 9 Z PUSH OPEN CLOSE 8 x stop 8 TAPE M fast forward 12 X pause 12 13 N play 12 z recording 13 m rewind 12 xZ stop eject 12 13 w 8 ws qs 2 wa 3 1 6 w wd qa wh wd wf 7 wg ...

Page 6: ...he power cord or if a power failure occurs Remote control ALPHABETICAL ORDER A P CD REMAIN 7 8 9 13 15 16 CLOCK TIMER 7 14 15 CLOCK TIMER 7 14 15 CLOCK TIMER SLEEP SET 7 14 15 MEGA BASS 14 MUSIC MENU 14 MUTING 14 PRESET 10 11 R Z REPEAT 8 SHUFFLE 8 TAPE 12 TIMER ON OFF 15 TUNER BAND 10 11 13 TUNER MEM ENTER PGM 7 9 10 14 15 TUNING 10 11 TUNING 10 11 VOL volume BUTTON DESCRIPTIONS m rewind M fast f...

Page 7: ... MECHANISM DECK CS 21SC 1280 Page 10 3 8 CASSETE LID Page 11 3 2 MAIN BOARD Page 8 3 4 POWER BOARD POWER TRANSFORMER Page 9 SET 3 1 Front Panel Section 8 connector CN203 5 two screws K3 5 3 two screws BTP2 6 10 1 screw BVTP3 10 4 two screws BVTP3 10 5 two screws K3 5 5 two screws K3 5 9 connector CN402 0 connector SW600 qa front panel section 7 2 antenna cover cabinet 6 claw Note Follow the disass...

Page 8: ...302 3 connector CN301 2 connector CN101 1 connector CN204 0 MAIN board 8 claw 7 screw BTP2 6 8 9 3 3 Tape Mechanism Deck TCM125 2 4 CASSETTE board 3 1 connector CN701 2 two screws BTP2 6 6 6 two screws BVTP3 10 6 two screws BVTP3 10 7 tape mechanism deck 5 Open the cassette lid ...

Page 9: ... 4 four screws BVTP3 12 6 power transformer 5 POWER board q power pwb mounting bkt 2 ac cord holder 7 Remove four solderings 8 Remove four solderings rear cabinet assy 3 5 DISPLAY Board HEADPHONE Board 3 screw PTPWH2 6 10 5 HEADPHONE board 4 reteiner board 2 DISPLAY board 1 seven screws BTP2 6 10 ...

Page 10: ...1280 1 two screws BVTP3 10 4 CD cover housing 8 vibration proof rubber pink 8 vibration proof rubber pink 6 four fiber washers 5 four pulley screws 8 vibration proof rubber orange 8 vibration proof rubber orange 9 CD mechanism deck CS 21SC 1280 6 3 7 two spring clamps 7 two spring clamps 2 Remove the connector ...

Page 11: ...11 HCD EP303 3 8 Cassette Lid 1 Push stop eject key 4 cassette lid 3 claw 3 claw 2 ...

Page 12: ...FWD CQ 102C 30 70 g cm 0 42 0 97 oz inch 0 15 5 39 mN m FWD CQ 102C 1 5 5 5 g cm Back Tension 0 021 0 076 oz inch more than 5 89 mN m FF CQ 201B more than 60 g cm more than 0 83 oz inch more than 5 89 mN m REW CQ 201B more than 60 g cm more than 0 83 oz inch Type Signal Used for WS 48A 3 kHz 0 dB Tape Speed Adjustment P 4 A063 6 3 kHz 10 dB Head Azimuth Adjustment Record Playback Head Azimuth Adju...

Page 13: ... 000 Hz Specified Value 2 910 to 3 090 Hz 3 Confirm that the frequency at the beginning and that at the end of tape winding are between 2 955 to 3 045 Hz Adjustment Location frequency counter test tape WS 48A 3 kHz 0 dB set HEADPHONE board PHONES jack JK401 32 Ω CAPSTAN REEL motor M201 Tape Speed Adjustment Adjustment Location Record Playback Head Note Refer to 3 8 Cassette Lid see page 11 adjustm...

Page 14: ...le level meter set 32 Ω 0 01 µF MAIN board FM ANT HEADPHONE board PHONES jack JK401 digital voltmeter 100 kΩ MAIN board TP10 FM VT TP11 AM VT no mark Except AEP UK models AEP UK models AM FREQUENCY COVERAGE ADJUSTMENT Adjustment Part Frequency Display Reading on Digital Voltmeter Confirmation 530 kHz 1 5 0 2 V 531 kHz T102 1 710 kHz 7 7 0 3 V 1 602 kHz 7 3 0 3 V AM TRACKING ADJUSTMENT Adjust for a...

Page 15: ...onnecting Points MAIN BOARD Component Side L104 FM Frequency Coverage Adjustment T102 AM Frequency Coverage Adjustment AM Tracking L110 Adjustment TC102 FM Tracking TC101 Adjustment L103 MAIN BOARD Conductor Side TP10 FM VT TP11 AM VT IC101 ...

Page 16: ...16 HCD EP303 SECTION 6 DIAGRAMS 6 1 Circuit Boards Location MAIN board LED board HEADPHONE board CASSETTE board DISPLAY board POWER board ...

Page 17: ...h a oscilloscope Voltage variations may be noted due to normal produc tion tolerances no mark FM CD STOP Circled numbers refer to waveforms Signal path F FM f AM E PB TAPE a REC TAPE J CD PLAY Abbreviation E51 Chilean and Peruvian model MY Malaysia model SP Singapore model AR Argentine model MX Mexican model AUS Australian model Note The components identi fied by mark 0 or dotted line with mark 0 ...

Page 18: ...DO DI CL CE IC102 FM AM PLL X102 7 2MHz XIN XOUT AM MIX FM MIX FM DET SD AM FM IF BUFFER AM IF 16 17 L R IC101 AM FM IF AMP MIX MPX DET OSC REC BIAS OSC Q706 SW701 3 6 REC PB R CH L R T701 REC BIAS ERASE HEAD REC PB HEAD AMP ALC CONT ALC IN1 IN1 OUT1 M 41 36 37 47 38 60 CAPSTAN REEL STEREO 45 SYNCRO TUNER SD ST PLLDI PLLCE PLLCL PLLDI PLLCE PLLCL STOUT SIG SIG ST PLLDI PLLCE PLLCE PLLCL STOUT AMP ...

Page 19: ...UT LVRIN LVROUT L3 CD CD L CD L CD R CDDAT CDCLK CDRS TUNER L CH PL L4 TUNER L2 TAPE DI CE 46 52 BASS BOOST MUTE MUTE 1 10 9 11 15 16 2 12 11 5 3 3 4 40 DATA 34 CD RESET 42 CD CLOCK 61 CD DATA D332 D333 SPEAKER IMPEDANCE USE 4Ω L R PHONES SPK301 JK401 IC601 2 3 SYSTEM CONTROLLER D A B C CL 14 39 CLOCK 48 CE TAPE SECTION TUNER SECTION TAPE SECTION TAPE SECTION H DISPLAY SECTION G DISPLAY SECTION CD...

Page 20: ...D317 D307 D310 D308 D311 Q308 309 8V REGULATOR Q313 9V REGULATOR Q312 6V REGULATOR ZD401 6V REGULATOR 9V D401 404 RECT D411 414 RECT Q401 402 POWER ON OFF RELAY DRIVE Q310 311 REGULATOR CONTROL SWITCH TR402 POWER TRANSFORMER SUB D405 408 RECT RL401 AC IN TR401 POWER TRANSFORMER MAIN REM601 REMOTE CONTROL RECEIVER 1 53 SW601 615 621 622 KEY MATRIX DPSW2 SLEND IC301 POWER AMP IC603 RESET SIGNAL GENE...

Page 21: ...OARD Page 25 A DISPLAY BOARD Page 25 E E E E E CD BLOCK SUPPLIED AS THE ASSEMBLED BLOCK E E E E E HEADPHONE BOARD JK401 PHONES 3 4 5 6 1 2 1 5 E POWER BOARD CN402 Page 27 EXCEPT AEP UK D309 A B C D E F G H I 1 2 3 4 5 6 7 8 9 10 11 Ref No Location D101 C 5 D102 C 5 D103 B 8 D104 C 9 D105 B 6 D306 G 7 D307 H 9 D308 G 8 D310 H 9 D311 I 9 D312 G 7 D314 G 7 D316 G 7 D317 H 9 D331 D 6 D332 D 6 D333 E 7...

Page 22: ...SC945TP AMP C127 0 047 C161 0 1 L110 AM FERRITE ROD ANTENNA B P F C113 0 01 C120 1u 50V C156 47u 16V C126 0 01 C112 0 001 C147 0 01 C148 2 2u 50V R147 2 2k C151 0 1 C163 100u 16V Q116 2SA733TP P B SWITCH X102 7 2MHz C114 0 022 R145 4 7K R118 3 3k X101 10 7MHz F101 10 7MHz R148 5 6k C145 100p C146 0 001 C117 0 0068 C129 4 7u 50V C118 0 0068 Q102 2SC945TP BAND SWITCH C112 0 22u 50V C123 0 47u 50V C1...

Page 23: ...0u 50V C240 0 0022 R242 3 3k D333 1N4148 R265 2 7k R264 2 7k R267 10k R266 10k C249 0 0022 CD BLOCK SUPPLIED AS THE ASSEMBLED BLOCK R243 3 3k AM FREQ STEP EXCEPT AEP UK 10 kHz 9 kHz D306 1N4148 D314 1N4148 Q301 2SC3623 LK Q206 2SC945TP MEGA BASS R303 4 7k C246 0 001 R240 8 2k R250 10k R248 2 2k R234 6 8k C248 0 1 50V C242 4 7u 50V C230 0 0082 C226 0 0033 C220 0 027 C216 0 0082 C222 0 0088 C206 0 1...

Page 24: ...k 1 2k 0 1 SW701 1 6 REC PB REC R PB 0 1 50V 0 022 50V 0 1 50V 0 1 5 6k 1 2k IN1 NF1 PC1 OUT1 GND IN2 NF2 PC2 OUT2 VCC ALC IN1 ALC CONST ALC IN2 RF SW701 5 6 REC PB REC r PB 50V IC701 ALC REC PB AMP Q701 702 MUTING 50V 50V 82k 2SC945 2SC945 2SC945 82k CASSETTE BOARD 0 0015 0 0015 330 2SD1616 L 50V 100k 1N4148TP 1N4148TP 4 7k Page 23 Q703 2SC945 MUTING CONTROL SWITCH MAIN BOARD 2 2 CN201 B IC B D I...

Page 25: ...TUNER MEM E E E K A K K K K E A A A A K K A A US CND EXCEPT AEP UK EXCEPT AEP UK EXCEPT AEP UK 1 80 61 60 41 40 21 20 A A K K A K A K A A K K A K A K A K 9 8 1 16 I 1 3 MAIN BOARD CN101 A Page 21 LCD BACK LIGHT EXCEPT AEP UK A B C D E 1 2 3 4 5 6 Ref No Location D601 C 5 D602 C 4 D603 C 5 D607 B 3 D608 B 3 D609 C 2 D610 C 2 D611 C 1 D612 C 3 D613 C 3 D614 C 3 D615 C 3 D616 C 5 D617 D 3 D618 C 3 D6...

Page 26: ... 6MHz 0 1 0 022 PST529D O G I 10 16V 1N4148 1N4148 1N4148 1N4148 TC4094BF 1N4148 1N4148 1N4148 0 1 22 10V 0 1 1N4148 1N4148 3 MAIN BOARD 2 2 CN204 D MAIN BOARD 2 2 CN302 C Page 23 Page 23 DISPLAY BOARD I TAPE TUNER CD MUSIC MENU MEGA BASS TUNER MEM PRESET PRESET VOLUME VOLUME TUNING REPEAT SHUFFLE TUNING LED BOARD COM0 S31 S30 S29 S28 S27 S26 S25 S24 S23 S22 S21 S20 S19 S18 S17 S16 S15 S14 S13 S12...

Page 27: ...1 AC IN TR401 POWER TRANSFORMER E E K A K A A B C D E F 1 2 3 4 5 Ref No Location D401 F 4 D402 F 3 D403 F 4 D404 F 4 D405 F 2 D406 F 3 D407 F 2 D408 F 3 D409 D 3 D411 D 4 D412 D 4 D413 D 4 D414 D 4 Q401 D 1 Q402 D 2 ZD401 E 2 Semiconductor Location See page 16 for Circuit Boards Location ...

Page 28: ...01 POWER TRANSFORMER MTZJ 6 8B Q401 402 POWER ON OFF RELAY DRIVE Q402 2SA733 C411 0 1 Q401 2SC3330 TR402 POWER TRANSFORMER 2 2k C410 680p 250V 82 1 4W EXCEPT US CND MX 10 1 4W US CND MX 120V EXCEPT US CND MX 250V US CND MX RL401 AC IN POWER BOARD 3 15A 125V EXCEPT US CND MX US CND MX 2A 125V US CND MX EXCEPT US CND MX 2 2k Page 23 510 EXCEPT US CND MX 180 US CND MX 100k EXCEPT US CND MX 180k US CN...

Page 29: ...ER FMRF IN RF GND FMRF OUT VCC2 FM OSC DET OUT MUTE R L AM FM MO ST FM DET AMRF IN REG AM OSC VCC1 FM MIX GND FM BUFFER AM OSC BUFFER AM MIX QUAD AMIF SD IC102 LC72131 PHASE DETECTOR CHARGE PUMP SWALLOW COUNTER 1 16 1 17 4BITS 12BITS PROGRAMMABLE DRIVER UNIVERSAL COUNTER REFERENCE DIVIDER POWER ON RESET 1 2 CCB INTERFACE 1 3 4 5 6 7 8 9 10 18 17 16 15 13 12 11 19 20 21 22 XOUT VSS AOUT AIN PD VDD ...

Page 30: ...17 30 27 24 21 18 LATCH DECODER CONTROL SHIFT REGISTER LVROUT LVRIN LTOUT LTCOM LT4 LT3 LT2 LT1 L4 L3 L2 L1 VDD CL DI RVROUT RVRIN RTOUT RTCOM RT4 RT3 RT2 RT1 R4 R3 R2 R1 VREF VSS CE RIPPLE FILTER ALC 14 13 12 1 2 3 11 10 9 AMP CH2 AMP CH1 8 4 5 6 7 VCC RF ALC IN2 OUT2 PC2 NF2 IN2 GND ALC CONST ALC IN1 OUT1 PC1 NF1 IN1 ...

Page 31: ...ecording on detection signal input Audio line muting on off control signal output H muting on PLL chip enable signal output to the FM AM PLL IC102 H active Chip enable signal output to the LC75392 IC203 H active Not used open Serial data input from the RDS decoder IC604 not used System power on off control signal out H power on Mega bass on off selection signal output H mega bass on CD lid open cl...

Page 32: ... FERRITE AEP UK 5 A 4676 971 A MAIN BOARD COMPLETE AEP UK 5 A 4729 806 A MAIN BOARD COMPLETE EXCEPT AEP UK 06 1 555 750 00 CORD POWER AEP E51 MY SP 06 1 696 535 11 CORD POWER UK 06 1 696 966 31 CORD POWER AUS 06 1 783 525 31 CORD POWER MX 06 1 783 820 11 CORD POWER US CND 06 1 783 941 51 CORD POWER AR 7 4 235 974 01 CAB ANTENNA COVER 8 1 823 170 11 CORD WITH CONNECTOR FM ANT 9 4 235 972 01 REAR CA...

Page 33: ...0 247 01 MAIN PWB MOUNT ING BKT A 62 A 4676 974 A CASSETTE BOARD COMPLETE 65 4 240 259 01 VOLUME SWING LEVER 66 4 235 989 01 VOLUME KNOB SPRING 67 4 240 262 01 CASS KEY PAUSE 68 4 240 263 01 CASS KEY STOP EJECT 69 4 240 264 01 CASS KEY FF 70 4 240 265 01 CASS KEY REW 71 4 240 266 01 CASS KEY PLAY 72 4 240 267 01 CASS KEY REC 73 4 240 261 01 TUNING SWING KNOB 74 4 240 257 01 TUNING SWING SHAFT 75 4...

Page 34: ...OARD COMPLETE AEP UK 111 A 4729 804 A DISPLY BOARD COMPLETE US CND 111 A 4729 808 A DISPLY BOARD COMPLETE EXCEPT US CND AEP UK 113 4 240 269 01 BASS MENU KNOB 114 4 240 271 01 PRESET UP DOWN KNOB 115 4 235 994 01 PANEL FIXING PLATE 116 4 240 268 01 DISPLAY POWER KNOB 117 4 240 272 01 FUNCTION KNOB 119 4 240 277 01 LCD DIFFUSE SHEET 120 4 240 243 01 LCD LIGHT GUIDE 121 4 240 254 01 LCD BACKLITE HOL...

Page 35: ...75 01 CD LID 159 4 240 242 01 CD LID WINDOW 160 4 235 970 01 NSX1 PUSH ROD 161 4 235 990 01 CD EJECT SPRING 162 4 235 982 01 CD LID SPRING 163 4 236 899 01 DAMPER 164 4 240 244 01 CD TRAY EXCEPT US CND 164 4 241 494 01 CD TRAY US CND 165 4 235 949 01 PU COVER 166 1 796 189 11 MECH CD 167 4 236 281 01 RUBBER VIBRATION PROOF ORG 168 4 235 971 01 PLASTIC COVER 169 4 236 860 01 METAL COVER SW600 1 692...

Page 36: ... MYLAR 0 0018uF 5 50V C718 1 130 474 00 MYLAR 0 0018uF 5 50V C719 1 126 964 11 ELECT 10uF 20 00 50V C720 1 126 947 11 ELECT 47uF 20 00 10V C721 1 126 935 11 ELECT 470uF 20 00 10V C722 1 161 494 00 CERAMIC 0 022uF 25V C723 1 128 551 11 ELECT 22uF 20 00 25V C725 1 130 476 00 MYLAR 0 0027uF 5 50V C727 1 161 494 00 CERAMIC 0 022uF 25V C728 1 126 964 11 ELECT 10uF 20 00 50V C729 1 130 487 00 MYLAR 0 02...

Page 37: ... DIODE SEL2215S CD TIMER D647 8 719 991 33 DIODE 1N4148TP D648 8 719 991 33 DIODE 1N4148TP US CND IC IC601 6 800 412 01 IC uPD753016AGC F37 IC602 8 759 009 22 IC TC4094BF IC603 8 759 971 11 IC PST529D COIL L601 1 410 521 11 INDUCTOR 100uH L602 1 410 509 11 INDUCTOR 10uH LIQUID CRYSTAL DISPLAY LD621 1 804 496 11 DISPLAY PANEL LIQUID CRYSTAL TRANSISTOR Q601 8 729 194 57 TRANSISTOR 2SC945TP QP Q602 8...

Page 38: ...OARD COMPLETE DIODE D1 8 719 329 10 DIODE SEL2910D LCD BACK LIGHT D2 8 719 329 10 DIODE SEL2910D LCD BACK LIGHT D3 8 719 329 10 DIODE SEL2910D LCD BACK LIGHT A 4676 971 A MAIN BOARD COMPLETE AEP UK A 4729 806 A MAIN BOARD COMPLETE EXCEPT AEP UK 1 424 881 11 AM BAR ANT 4 235 969 01 BAR HOLDER 7 682 549 09 SCREW B 3X10 TERMINAL ANT101 1 694 848 11 TERMINAL BOARD ANT FM FM ANT CAPACITOR C102 1 162 28...

Page 39: ...C 0 001uF 10 50V C247 1 126 956 91 ELECT 0 1uF 20 00 50V C248 1 126 956 91 ELECT 0 1uF 20 00 50V C249 1 162 302 11 CERAMIC 0 0022uF 30 00 16V C250 1 126 964 11 ELECT 10uF 20 00 50V C251 1 127 872 11 CERAMIC 4700PF 10 50V C301 1 130 471 00 MYLAR 0 001uF 5 50V C302 1 130 471 00 MYLAR 0 001uF 5 50V C303 1 126 947 11 ELECT 47uF 20 00 16V C304 1 126 947 11 ELECT 47uF 20 00 16V C305 1 130 497 00 MYLAR 0...

Page 40: ... 11 CARBON 100K 5 1 4W R118 1 247 843 11 CARBON 3 3K 5 1 4W R120 1 249 429 11 CARBON 10K 5 1 4W R121 1 247 883 00 CARBON 150K 5 1 4W R123 1 247 903 00 CARBON 1M 5 1 4W R124 1 249 429 11 CARBON 10K 5 1 4W R126 1 249 402 11 CARBON 56 5 1 4W F R131 1 249 441 11 CARBON 100K 5 1 4W R134 1 249 437 11 CARBON 47K 5 1 4W R135 1 249 425 11 CARBON 4 7K 5 1 4W F R136 1 249 427 11 CARBON 6 8K 5 1 4W F R139 1 2...

Page 41: ...W R325 1 249 441 11 CARBON 100K 5 1 4W R327 1 249 416 11 CARBON 820 5 1 4W F R328 1 249 429 11 CARBON 10K 5 1 4W R329 1 249 409 11 CARBON 220 5 1 4W F R330 1 249 409 11 CARBON 220 5 1 4W F R331 1 249 429 11 CARBON 10K 5 1 4W R333 1 260 064 11 CARBON 1 5 1 2W R334 1 249 437 11 CARBON 47K 5 1 4W R341 1 249 429 11 CARBON 10K 5 1 4W R342 1 249 429 11 CARBON 10K 5 1 4W R343 1 249 429 11 CARBON 10K 5 1 ...

Page 42: ...441 11 CARBON 100K 5 1 4W EXCEPT US CND MX R404 1 249 404 00 CARBON 82 5 1 4W F EXCEPT US CND MX R404 1 249 393 11 CARBON 10 5 1 4W US CND MX R405 1 249 441 11 CARBON 100K 5 1 4W 0R406 1 216 478 11 METAL OXIDE 390 5 3W RELAY 0RL401 1 755 446 11 RELAY 120V EXCEPT US CND MX 0RL401 1 755 448 11 RELAY 250V US CND MX TRANSFORMER 0TR402 1 437 815 11 TRANSFORMER POWER EXCEPT US CND MX 0TR402 1 437 817 11...

Page 43: ...43 HCD EP303 MEMO ...

Page 44: ...p to the revised page Also clicking the version at the upper right on the revised page allows you to jump to the next revised page Ver Date Description of Revision 1 0 2002 03 New 1 1 2002 11 Correction of parts supply classification of tape mechanism deck SPM 02095 ...