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3 7 63 1515 0
SERVICE MANUAL
Ver 1.0 2002. 05
HCD-EP305 is the amplifler, CD
player, tape deck and tuner section in
CMT-EP305.
TE
L 13942296513
www
.
Sony Corporation
9-874-072-01
2002E1600-1
Home Audio Company
© 2002.05
Published by Sony Engineering Corporation
http://www.xiaoyu163.com
Amplifier section
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
Outputs
PHONES:
Accepts headphones of
8 Ω or more
(stereo mini jack)
SPEAKER:
Accepts impedance of 4 to
16 Ω
CD player section
System
Compact disc and digital
audio system
Laser
Semiconductor laser
(λ=780 nm)
Emission duration:
continuous
Frequency response
20 Hz - 20 kHz (±0.5 dB)
Tape player section
Recording system
4-track 2-channel stereo
Frequency response
50 - 13 000 Hz (±3 dB),
using Sony TYPE I
cassette
x
ao
u163
y
i
http://www.xiaoyu163.com
HCD-EP305
2 9
8
Model Name Using Similar Mechanism
CD
SECTION
CD Mechanism Type
Model Name Using Similar Mechanism
TAPE DECK
SECTION
Tape Transport Mechanism Type
Q Q
3
6 7
1 3
1 5
SPECIFICATIONS
Tuner section
FM stereo, FM/AM superheterodyne tuner
FM tuner section
Tuning range
Antenna
Intermediate frequency
AM tuner section
Tuning range
Antenna
Intermediate frequency
General
Power requirements
Power consumption
Dimensions (w/h/d):
Mass:
Design and specifications are subject to change
without notice.
COMPACT DISC DECK RECEIVER
co
.
9 4
2 8
AEP Model
HCD-EP30/EP40
CS-21SC-1280
HCD-EP30/EP40
TCM125-2
0 5
8
2 9
9 4
2 8
87.5 - 108.0 MHz
FM lead antenna
10.7 MHz
531 -1 602 kHz
(with the interval set at
9 kHz)
Built-in ferrite bar antenna
450 kHz
230 V AC, 50/60 Hz
30 W
0.5 W (in the standby
mode)
Approx. 145 × 240 × 252 mm
Approx. 2.9 kg
m
9 9
9 9

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Table of Contents

   Summary of Contents for Sony HCD-EP305

  • Page 1 HCD-EP305 3 7 63 1515 0 SERVICE MANUAL AEP Model Ver 1.0 2002. 05 HCD-EP305 is the amplifler, CD player, tape deck and tuner section in CMT-EP305. Model Name Using Similar Mechanism HCD-EP30/EP40 SECTION CD Mechanism Type CS-21SC-1280 Model Name Using Similar Mechanism...
  • Page 2: Table Of Contents

    COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE WITH MARK 0 ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.
  • Page 3: Servicing Notes

    HCD-EP305 SECTION 1 SERVICING NOTES 3 7 63 1515 0 TO PREVENT ‘TAPE OSCILLATION SOUND AT VOLUME’ NOTES ON HANDLING THE OPTICAL PICK-UP MAXIMUM SETTING (W/O TAPE) BLOCK OR BASE UNIT The laser diode in the optical pick-up block may suffer electrostatic...
  • Page 4: General

    HCD-EP305 SECTION 2 GENERAL 3 7 63 1515 0 This section is extracted from instruction manual. Main unit ALPHABETICAL ORDER BUTTON DESCRIPTIONS @/1 (power) R – Z A – P Remote sensor q; Cassette compartment qd (12) REPEAT .m /M> (go back/go...
  • Page 5: Remote Control

    HCD-EP305 3 7 63 1515 0 Remote control ALPHABETICAL ORDER BUTTON DESCRIPTIONS R – Z m (rewind) M (fast forward) A – P qg (8) REPEAT CD/REMAIN (7, 8, 9, 13, 15, . (go back) > (go forward) SHUFFLE...
  • Page 6: Disassembly

    HCD-EP305 SECTION 3 DISASSEMBLY 3 7 63 1515 0 • The equipment can be removed using the following procedure. FRONT PANEL SECTION CASSETTE LID POWER BOARD, MAIN BOARD CD CABINET SECTION POWER TRANSFORMER TAPE MECHANISM DECK DISPLAY BOARD, CD MECHANISM DECK...
  • Page 7: Main Board

    HCD-EP305 3 7 63 1515 0 3-2. MAIN Board 0 MAIN board 7 screw (+BTP2.6 × 8) 2 connector (CN101) 1 connector (CN204) 4 connector (CN302) 3 connector (CN301) 5 connector (CN201) 8 claw 6 connector (CN202) L 13942296513 3-3.
  • Page 8: Power Board, Power Transformer

    HCD-EP305 3 7 63 1515 0 3-4. POWER Board, Power Transformer rear cabinet assy 2 AC cord holder 1 screw (+BVTP3 × 10) q; power pwb mounting bkt 3 screw (+BVTP3 × 10) 7 Remove four solderings. 4 four screws (+BVTP3 ×...
  • Page 9: Cd Cabinet Section

    HCD-EP305 3 7 63 1515 0 3-6. CD Cabinet Section 2 CD cabinet section 1 two screws (+BTP2.6 × 8) 3-7. CD Mechanism Deck (CS-21SC-1280) L 13942296513 8 vibration proof rubber 7 two spring clamps (orange) 9 CD mechanism deck (CS-21SC-1280)
  • Page 10: Cassette Lid

    HCD-EP305 3 7 63 1515 0 3-8. Cassette Lid 3 claw 1 Push stop/eject key. 3 claw 4 cassette lid L 13942296513 u163 http://www.xiaoyu163.com...
  • Page 11: Mechanical Adjustments

    HCD-EP305 SECTION 4 SECTION 5 MECHANICAL ADJUSTMENTS ELECTRICAL ADJUSTMENTS 3 7 63 1515 0 PRECAUTION PRECAUTION Clean the following parts with a denatured-alcohol-moistened Setting swab : MEGA BASS switch : OFF record/playback head pinch roller erase head rubber belts TAPE DECK SECTION 0 dB=0.775 V...
  • Page 12 HCD-EP305 3 7 63 1515 0 Tape Speed Adjustment Adjustment Location: Record/Playback Head. Setting: Function: TAPE test tape WS-48A frequency counter (3 kHz, 0 dB) 32 Ω – HEADPHONE board PHONES jack (JK401) Procedure: Playback WS-48A (tape center) in the FWD state.
  • Page 13 HCD-EP305 3 7 63 1515 0 0 dB=1 µV TUNER SECTION AM FREQUENCY COVERAGE ADJUSTMENT Adjustment Part Frequency Display Reading on Digital Voltmeter [AM] 1.5 ± 0.2 V Confirmation 531 kHz Setting: 7.3 ± 0.3 V T102 1,602 kHz...
  • Page 14 HCD-EP305 3 7 63 1515 0 Adjustment Location and Connecting Points – MAIN BOARD (Component Side) – T102 FM Tracking TC101 AM Frequency Coverage Adjustment Adjustment L103 AM Tracking L110 Adjustment TC102 L104 FM Frequency Coverage Adjustment L 13942296513 –...
  • Page 15: Diagrams

    HCD-EP305 SECTION 6 DIAGRAMS 3 7 6 3 1 5 1 5 0 6-1. Circuit Boards Location Note on Printed Wiring Board: Note on Schematic Diagram: • All capacitors are in µF unless otherwise noted. p: pF. W : indicates side identified with part number.
  • Page 16: Block Diagrams

    HCD-EP305 6-2. Block Diagrams 3 7 6 3 1 5 1 5 0 Tuner/Tape Deck Section AM TRACKING IC101 TC102 L110 AM/FM IF AMP, AM ANT TUNER AMRF MIX, MPX, DET, OSC L-CH AMP SECTION T103 F102 D105 T102...
  • Page 17 HCD-EP305 AMP Section 3 7 6 3 1 5 1 5 0 JK401 PHONES IC203 FUNCTION SELECT SWITCH, ELECTRONIC VOLUME TUNER TUNER L-CH LVROUT TUNER SECTION IC301 POWER AMP R-CH TAPE LVRIN D332 TAPE SECTION Q206 MEGA BASS SPK301...
  • Page 18 HCD-EP305 Display/Power Section 3 7 6 3 1 5 1 5 0 IC601 (3/3) SYSTEM CONTROLLER, LIQUID CRYSTAL DISPLAY DRIVER 69-80, ı 1 -20 LD621 LIQUID CRYSTAL DISPLAY COM0 ı 21-24 COM3 SW601 - 615, 621, 622 KEY R0...
  • Page 19: Printed Wiring Board Main Section

    HCD-EP305 6-3. Printed Wiring Board MAIN Section • See page 15 for Circuit Boards Location. 3 7 6 3 1 5 1 5 0 L110 AM FERRITE-ROD ANTENNA MAIN BOARD • Semiconductor Location Ref. No. Location D101 D102 ANT1...
  • Page 20: Schematic Diagram Mian Section (1/2)

    HCD-EP305 6-4. Schematic Diagram MIAN Section (1/2) • See page 15 for Waveforms. • See page 27 for IC Block Diagrams. 3 7 6 3 1 5 1 5 0 MAIN BOARD (1/2) TP10 (FM VT) R148 5.6k R112 C148 3.3k...
  • Page 21: Schematic Diagram Mian Section (2/2)

    HCD-EP305 6-5. Schematic Diagram MIAN Section (2/2) • See page 28 for IC Block Diagrams. 3 7 6 3 1 5 1 5 0 MAIN BOARD DISPLAY DISPLAY (Page 24) (Page 24) BOARD BOARD (1/2) (Page 20) * CD...
  • Page 22: Printed Wiring Board Cassette Section

    HCD-EP305 6-6. Printed Wiring Board CASSETTE Section • See page 15 for Circuit Boards Location. 6-7. Schematic Diagram CASSETTE Section 3 7 6 3 1 5 1 5 0 • See page 15 for Waveforms. • See page 28 for IC Block Diagrams.
  • Page 23: Printed Wiring Board Display Section

    HCD-EP305 6-8. Printed Wiring Board DISPLAY Section • See page 15 for Circuit Boards Location. 3 7 6 3 1 5 1 5 0 DISPLAY BOARD • Semiconductor Location LIQUID CRYSTAL DISPLAY IC603 Ref. No. Location MEGA BASS D601...
  • Page 24: Schematic Diagram Display Section

    HCD-EP305 6-9. Schematic Diagram DISPLAY Section • See page 15 for Waveforms. 3 7 6 3 1 5 1 5 0 DISPLAY BOARD LD621 LIQUID CRYSTAL DISPLAY TIMER SEL2215S-CD IC603 TAPE TUNER RESET SIGNAL 2.7k GENERATOR COM0 VOLUME +...
  • Page 25: Printed Wiring Board Power Section

    HCD-EP305 6-10. Printed Wiring Board POWER Section • See page 15 for Circuit Boards Location. 3 7 6 3 1 5 1 5 0 POWER BOARD • Semiconductor Location Ref. No. Location D401 D402 D403 D404 D405 D406 D407...
  • Page 26: Schematic Diagram Power Section

    HCD-EP305 6-11. Schematic Diagram POWER Section 3 7 6 3 1 5 1 5 0 POWER BOARD 82 1/4W TR402 C410 680p 250V POWER TRANSFORMER RL401 120V C401 MTZJ-6.8B 2.2k C411 Q401 2SC3330 Q402 2.2k 2SA733 Q401, 402 POWER ON/OFF C404 0.01u...
  • Page 27 HCD-EP305 3 7 63 1515 0 • IC Block Diagrams – MAIN Board – IC101 LA1823 GND2 VCC2 MUTE PHASE PILOT DECODER COMP ST SW TRIG S-METER BUFFER BUFFER VCC1 GND1 L 13942296513 IC102 LC72131 PHASE DETECTOR CHARGE PUMP...
  • Page 28 HCD-EP305 3 7 63 1515 0 IC203 LC75392 LVROUT RVROUT LVRIN RVRIN LTOUT RTOUT – LTCOM RTCOM LATCH DECODER SHIFT REGISTER VREF CONTROL L 13942296513 – CASSETTE Board – IC701 AN7312 RIPPLE FILTER AMP. CH2 AMP. CH1 u163 http://www.xiaoyu163.com...
  • Page 29: Ic Pin Function Description

    HCD-EP305 3 7 63 1515 0 6-12. IC Pin Function Description • IC601 µPD753016AGC-F37-3B9 System Controller, Liquid Crystal Display Driver (DISPLAY Board) Pin No. Pin Name Description 1 to 20 S12 to S31 Segment drive signal output to the liquid crystal display (LD621)
  • Page 30: Exploded Views

    HCD-EP305 SECTION 7 EXPLODED VIEWS 3 7 63 1515 0 NOTE: • -XX, -X mean standardized parts, so they may • The mechanical parts with no reference number The components identified by mark 0 or have some differences from the original one.
  • Page 31: Front Panel Section -1

    HCD-EP305 3 7 63 1515 0 7-2. Front Panel Section -1 not supplied (including M201) L 13942296513 not supplied Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks 4-240-260-01 VOLUME SWING KNOB 4-240-264-01 CASS KEY (FF)
  • Page 32: Front Panel Section -2

    HCD-EP305 3 7 63 1515 0 7-3. Front Panel Section -2 121 123 supplied not supplied LD621 L 13942296513 Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks 4-235-995-01 RUBBER FOOT 4-240-277-01 LCD DIFFUSE SHEET 4-240-273-01 FRONT PANEL...
  • Page 33: Cd Cabinet Section

    HCD-EP305 3 7 63 1515 0 7-4. CD Cabinet Section SW600 L 13942296513 Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks 4-240-255-01 CD COVER HOUSING 4-240-244-01 CD TRAY 4-236-280-01 RUBBER, VIBRATION PROOF (PINK) 4-235-949-01 PU COVER...
  • Page 34: Electrical Parts List

    HCD-EP305 SECTION 8 CASSETTE ELECTRICAL PARTS LIST 3 7 63 1515 0 NOTE: • Due to standardization, replacements in the • SEMICONDUCTORS • CAPACITORS: In each case, u: µ, for example: uF: µF parts list may be different from the parts uA...: µA...
  • Page 35 HCD-EP305 CASSETTE DISPLAY 3 7 63 1515 0 Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks < COIL > < LIQUID CRYSTAL DISPLAY > T701 1-424-875-11 COIL (OSC) LD621 1-804-496-11 DISPLAY PANEL, LIQUID CRYSTAL ************************************************************** <...
  • Page 36 HCD-EP305 DISPLAY HEADPHONE MAIN 3 7 63 1515 0 Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks < IC > < CAPACITOR > REM601 6-600-092-01 RPM7138-V4 C102 1-162-282-31 CERAMIC 100PF C104 1-162-294-31 CERAMIC 0.001uF < SWITCH >...
  • Page 37 HCD-EP305 MAIN 3 7 63 1515 0 Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks C206 1-127-888-11 CERAMIC 0.1uF C329 1-127-888-11 CERAMIC 0.1uF C207 1-127-888-11 CERAMIC 0.1uF C208 1-127-888-11 CERAMIC 0.1uF C330 1-126-960-11 ELECT 20.00% 50V...
  • Page 38 HCD-EP305 MAIN 3 7 63 1515 0 Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks L301 1-410-525-11 INDUCTOR 220uH R166 1-249-437-11 CARBON 1/4W R168 1-249-427-11 CARBON 6.8K 1/4W F < TRANSISTOR > R169 1-249-415-11 CARBON...
  • Page 39 HCD-EP305 MAIN POWER 3 7 63 1515 0 Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks R302 1-249-437-11 CARBON 1/4W C404 1-102-129-00 CERAMIC 10000PF R303 1-249-425-11 CARBON 4.7K 1/4W F C405 1-104-665-11 ELECT 100uF 20.00% 25V...
  • Page 40 HCD-EP305 3 7 63 1515 0 Ref. No. Part No. Description Remarks MISCELLANEOUS ************* 1-500-712-11 CORE, FERRITE 1-555-750-00 CORD, POWER 1-823-170-11 CORD (WITH CONNECTOR) (FM ANT) 1-471-144-11 MAGNET 1-796-189-11 MECH, CD SW600 1-692-960-21 SWITCH, PUSH (1 KEY) (OPEN/CLOSE) 0 TR401...
  • Page 41 HCD-EP305 3 7 63 1515 0 MEMO L 13942296513 u163 http://www.xiaoyu163.com...
  • Page 42 HCD-EP305 3 7 63 1515 0 REVISION HISTORY Clicking the version allows you to jump 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.

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