Sony HCD-EP50LIV Service Manual
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Sony HCD-EP50LIV Service Manual

Sony HCD-EP50LIV Service Manual

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3 7 63 1515 0
SERVICE MANUAL
Ver 1.0 2002.02
HCD-EP50LIV is the amplifier, CD player, tape
deck and tuner section in CMT-EP50LIV.
TE
L 13942296513
AUDIO POWER SPECIFICATIONS:
POWER OUTPUT AND TOTAL
HARMONIC DISTORTION:
with 8 Ω loads both channels driven, from 120
- 10,000 Hz; rates 12 W per channel minimum
RMS power, with no more than 10% total
harmonic distortion from 250 mW to rated
output.
Amplifier section
The following measured at AC 230 V, 50/60 Hz
DIN power output (rated) 11 + 11 W
Continuous RMS power output (reference)
Outputs
PHONES:
(stereo mini jack)
SPEAKER:
www
.
Sony Corporation
9-873-634-01
2002B0500-1
Home Audio Company
C 2002.02
Published by Sony Engineering Corporation
http://www.xiaoyu163.com
CD player section
System
Laser
Frequency response
Tape player section
Recording system
Frequency response
(8 Ω at 1 kHz, DIN)
Tuner section
FM stereo, FM/AM superheterodyne tuner
12 + 12 W
(8 Ω at 1 kHz, 10% THD)
FM tuner section
Tuning range
Accepts headphones of
Antenna
8 Ω or more
Antenna terminal
Accepts impedance of 8 to
Intermediate frequency
16 Ω
x
ao
y
i
http://www.xiaoyu163.com
HCD-EP50LIV
8
Model Name Using Similar Mechanism
CD
Section
CD Mechanism Type
Model Name Using Similar Mechanism
TAPE
Section
Tape Transport Mechanism Type
SPECIFICATIONS
Q Q
3
6 7
1 3
Compact disc and digital
audio system
Semiconductor laser
(λ=780 nm)
Emission duration:
continuous
20 Hz - 20 kHz (±0.5 dB)
4-track 2-channel stereo
50 - 13 000 Hz (±3 dB),
using Sony TYPE I
cassette
87.5 - 108.0 MHz
FM lead antenna
75 Ω coaxial
10.7 MHz
MICRO Hi-Fi COMPONENT SYSTEM
u163
.
2 9
9 4
2 8
HCD-EP50
CS-21SC-1280
NEW
CRL3439
1 5
0 5
8
2 9
9 4
AM tuner section
Tuning range
Antenna
Antenna terminal
Intermediate frequency
General
Power requirements:
Power consumption:
Dimensions (w/h/d):
Mass:
Supplied accessories:
Design and specifications are subject to change
m
co
9 9
US Model
2 8
9 9
530 - 1 710 kHz
(with the interval set at
10 kHz)
531 - 1 710 kHz
(with the interval set at
9 kHz)
AM loop antenna
External antenna terminal
450 kHz
120 V AC, 60 Hz
35 W
Approx. 145 × 238 × 234 mm
Approx. 3.4 kg
AM loop antenna (1)
Remote Commander (1)
Batteries (2)
FM lead antenna (1)

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  • Page 1 HCD-EP50LIV 3 7 63 1515 0 SERVICE MANUAL US Model Ver 1.0 2002.02 HCD-EP50LIV is the amplifier, CD player, tape deck and tuner section in CMT-EP50LIV. Model Name Using Similar Mechanism HCD-EP50 Section CD Mechanism Type CS-21SC-1280 Model Name Using Similar Mechanism...

  • Page 2: Table Of Contents

    HCD-EP50LIV 3 7 63 1515 0 TABLE OF CONTENTS CAUTION Use of controls or adjustments or performance of procedures SERVICING NOTES ..........4 other than those specified herein may result in hazardous ra- diation exposure. GENERAL ..............5 DISASSEMBLY 3-1.

  • Page 3: Leakage Test

    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 PUB- LISHED BY SONY.

  • Page 4: Servicing Notes

    HCD-EP50LIV SECTION 1 SERVICING NOTES 3 7 63 1515 0 NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR BASE UNIT The laser diode in the optical pick-up block may suffer electro- static break-down because of the potential difference generated by the charged electrostatic load, etc.

  • Page 5: General

    HCD-EP50LIV SECTION 2 This section is extracted from instruction manual. 3 7 63 1515 0 GENERAL Parts Identification The items are arranged in alphabetical order. Refer to the pages indicated in parentheses ( ) for details. Main unit 1 2 3 4 5 6...

  • Page 6: Remote Control

    HCD-EP50LIV 3 7 63 1515 0 Remote Control Setting the time Turn on the system. 1 2 3 4 Press CLOCK/TIMER on the remote. When you set the clock for the first time, go to step 5. Press CLOCK/TIMER on the remote repeatedly until “SET CLK”...

  • Page 7: Disassembly

    HCD-EP50LIV SECTION 3 DISASSEMBLY 3 7 63 1515 0 • This set can be disassembled in the order shown below. 3-1. DISASSEMBLY FLOW 3-2. FRONT PANEL SECTION (Page 8) 3-6. TAPE MECHANISM DECK 3-3. MAIN BOARD 3-4. CD CABINET SECTION...

  • Page 8: Front Panel Section

    HCD-EP50LIV 3 7 63 1515 0 Note: Follow the disassembly procedure in the numerical order given. 3-2. FRONT PANEL SECTION 1 two screws (BTP2.6 × 10) 4 claw 3 two screws (K3 × 5) 6 connector (CN3) 2 two screws (BVTP3 ×...

  • Page 9: Cd Cabinet Section

    HCD-EP50LIV 3 7 63 1515 0 3-4. CD CABINET SECTION 2 CD cabinet section 1 two screws (BTP2.6 × 8) 3-5. CD MECHANISM DECK (CS-21SC-1280) L 13942296513 7 vibration proof rubber 6 two spring clamps (ORG) 8 CD mechanism deck (CS-21SC-1280)

  • Page 10: Tape Mechanism Deck (Crl3439)

    HCD-EP50LIV 3 7 63 1515 0 3-6. TAPE MECHANISM DECK (CRL3439) 1 two screws (BVTP3 × 10) 2 tape mechanism deck (CRL3439) 1 two screws (BVTP3 × 10) L 13942296513 3-7. CASSETTE LID 2 claw 1 Open the cassette lid.

  • Page 11: Mechanical Adjustments

    HCD-EP50LIV SECTION 4 SECTION 5 MECHANICAL ADJUSTMENTS ELECTRICAL ADJUSTMENTS 3 7 63 1515 0 PRECAUTION PRECAUTION 1. Clean the following parts with a denatured-alcohol-moistened 1. Setting swab : MEGA BASS switch : OFF record/playback head pinch roller erase head...
  • Page 12 HCD-EP50LIV 3 7 63 1515 0 Tape Speed Adjustment Adjustment Location: Record/Playback Head. Setting: Function: TAPE test tape WS-48B frequency counter (3 kHz, 0 dB) 47 k Ω – MAIN board SPEAKER terminal (CN17) Procedure: 1. Playback WS-48B (tape center) in the FWD state.
  • Page 13 HCD-EP50LIV 3 7 63 1515 0 0 dB=1 µV AM IF ADJUSTMENT TUNER SECTION Adjust for a maximum reading on level meter [AM] 450 kHz Setting: Function : TUNER AM FREQUENCY COVERAGE ADJUSTMENT Band switch : AM Adjustment Part Frequency Display Reading on Digital Voltmeter Put the lead-wire 1.3 ±...
  • Page 14 HCD-EP50LIV 3 7 63 1515 0 Adjustment Location and Connecting Points – MAIN BOARD (Component Side) – – MAIN BOARD (Conductor Side) – AM IF Adjustment AM Tracking Adjustment (FM VT) (AM VT) AM Frequency Coverage Adjustment L 13942296513...

  • Page 15: Diagrams

    HCD-EP50LIV SECTION 6 3 7 6 3 1 5 1 5 0 DIAGRAMS 6-1. BLOCK DIAGRAM – TUNER Section – FM RF AMP/MIX/OSC IC901 T901 FM IFT FM RF B. P. F. FM RF FM MIX BPF901 FM OSC...

  • Page 16: Block Diagram - Tape Deck Section

    HCD-EP50LIV 3 7 6 3 1 5 1 5 0 6-2. BLOCK DIAGRAM – TAPE DECK Section – REC/PB RL-CH REC AMP SWITCH (Page 17) RR-CH R-CH AMP GAIN CONTROL R-CH HPRE101 (1/2) (RECORD/PLAYBACK) OUT1 TL-CH TR-CH L-CH R-CH...

  • Page 17: Block Diagram - Main Section

    HCD-EP50LIV 3 7 6 3 1 5 1 5 0 6-3. BLOCK DIAGRAM – MAIN Section – RL-CH (Page 16) CN17 INPUT SELECT SWITCH, RR-CH R-CH ELECTRICAL VOLUME SPEAKER TL-CH IMPEDANCE USE 8Ω TR-CH R-CH LVRIN LVROUT LTOUT LINE AMP...

  • Page 18: Block Diagram - Display/Power Supply Section

    HCD-EP50LIV 3 7 6 3 1 5 1 5 0 6-4. BLOCK DIAGRAM – DISPLAY/POWER SUPPLY Section – 8V (CD) REGULATOR CD BLOCK B+ Q9, 12 REGULATOR CD-EN, TU-EN CD-EN (Page 16) CONTROL SWITCH POWER TRANSFORMER D701 – 709...

  • Page 19: Note For Printed Wiring Boards And Schematic Diagrams

    HCD-EP50LIV 3 7 6 3 1 5 1 5 0 6-5. NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS 6-6. SCHEMATIC DIAGRAM – FM TUNER Section – • See page 28 for IC Block Diagram. Note on Printed Wiring Board: Note on Schematic Diagram: •...

  • Page 20: Schematic Diagram - Main Board (1/3)

    HCD-EP50LIV 3 7 6 3 1 5 1 5 0 6-7. SCHEMATIC DIAGRAM – MAIN Board (1/3) – • • See page 28 for Waveform. See page 28 for IC Block Diagrams. MAIN BOARD (1/3) FM/AM BAND STEREO/MONO SELECT SWITCH...

  • Page 21: Schematic Diagram - Main Board (2/3)

    HCD-EP50LIV 3 7 6 3 1 5 1 5 0 6-8. SCHEMATIC DIAGRAM – MAIN Board (2/3) – • • See page 28 for Waveforms. See page 28 for IC Block Diagrams. MAIN BOARD (2/3) AMP GAIN CONTROL [12] 12.1...

  • Page 22: Schematic Diagram - Main (3/3)/Headphone Boards

    HCD-EP50LIV 3 7 6 3 1 5 1 5 0 6-9. SCHEMATIC DIAGRAM – MAIN (3/3)/HEADPHONE Boards – MAIN BOARD (3/3) POWER AMP 17.5 17.5 2SD1616 MUTING MAIN BOARD 1SS133T (1/3) CN17 (Page 20) – SPEAKER – (IMPEDANCE USE 8Ω)

  • Page 23: Printed Wiring Boards - Main/Headphone Boards

    HCD-EP50LIV 3 7 6 3 1 5 1 5 0 6-10. PRINTED WIRING BOARDS – MAIN/HEADPHONE Boards – • Semiconductor Location Ref. No. Location Ref. No. Location HPRE101 REC/PB/ERASE HEAD (INCLUDED IN MAIN BOARD) MAIN BOARD AM IF FM OSC...

  • Page 24: Printed Wiring Board - Display Board

    HCD-EP50LIV 3 7 6 3 1 5 1 5 0 6-11. PRINTED WIRING BOARD – DISPLAY Board – • Semiconductor Location Ref. No. Location (Page 23) D301 DISPLAY BOARD D302 D303 MAIN BOARD D304 E C B D305 SW316...

  • Page 25: Schematic Diagram - Display Board

    HCD-EP50LIV 3 7 6 3 1 5 1 5 0 6-12. SCHEMATIC DIAGRAM – DISPLAY Board – • See page 28 for Waveform. DISPLAY BOARD SW305 CN301 LIQUID CRYSTAL DISPALY PLAY MODE ROS/DIR (AEP, UK) L934SGC/B L934SGC/B L934SGC/B TAPE TUNER 0.01...

  • Page 26: Printed Wiring Board - Power Board

    HCD-EP50LIV 3 7 6 3 1 5 1 5 0 6-13. PRINTED WIRING BOARD – POWER Board – • Semiconductor Location Ref. No. Location D601 AC IN D602 D603 D604 POWER BOARD D605 D606 D607 D608 D612 D613 D615...

  • Page 27: Schematic Diagram - Power Board

    HCD-EP50LIV 3 7 6 3 1 5 1 5 0 6-14. SCHEMATIC DIAGRAM – POWER Board – POWER BOARD T601 POWER TRANSFORMER (MAIN) L601 400µH F601 4A 125V 0.001 250V R625 3.3M 1/2W CN601 F602 2A 125V 1 3 9 4 2 2 9 6 5 1 3...
  • Page 28 HCD-EP50LIV 3 7 6 3 1 5 1 5 0 • Waveforms • IC Block Diagrams – DISPLAY Board – – MAIN Board – – MAIN Board – 1 U2 w; (X2) 4 Q31 (Base) (REC (ISS 1) mode)
  • Page 29 HCD-EP50LIV 3 7 63 1515 0 U6 LC75392 LVROUT RVROUT LVRIN RVRIN LTOUT RTOUT – LTCOM RTCOM LATCH DECODER SHIFT REGISTER VREF CONTROL L 13942296513 U12 µPC1330HA-NA U13 AN7312 INVERTER RIPPLE FILTER AMP. CH2 COMPARATER SW P1 CONT GND...
  • Page 30 HCD-EP50LIV 3 7 63 1515 0 U14 BA335 COMPARATOR AF AMP IC901 TA2132AF (EL) FM/AM FM OSC BUFFER FM DET AM DET FM IF FM RF FM MIX AM MIX AM IF L 13942296513 u163 http://www.xiaoyu163.com...

  • Page 31: Ic Pin Function Description

    HCD-EP50LIV 3 7 63 1515 0 6-15. IC PIN FUNCTION DESCRIPTION • DISPLAY BOARD IC301 µPD78064GF-187-3BA (SYSTEM CONTROLLER, LIQUID CRYSTAL DISPLAY DRIVER) Pin No. Pin Name Description GENERALDOUT Serial data output to the FM/AM PLL (U2), LC75392 (U6) and 94HC4094 (U15)
  • Page 32 HCD-EP50LIV 3 7 63 1515 0 Pin No. Pin Name Description STROBE Strobe signal output to the 94HC4094 (U15) “H” active INPINENA Mega bass on/off selection signal output “H”: mega bass on Dolby NR on/off selection signal output terminal “L”: dolby off, “H”: dolby on...

  • Page 33: Exploded Views

    HCD-EP50LIV SECTION 7 EXPLODED VIEWS 3 7 63 1515 0 NOTE: • Items marked “*” are not stocked since they • -XX and -X mean standardized parts, so they The components identified by mark 0 or dotted line with mark 0 are may have some difference from the original are seldom required for routine service.

  • Page 34: Front Panel Section-1

    HCD-EP50LIV 3 7 63 1515 0 7-2. FRONT PANEL SECTION-1 not supplied L 13942296513 not supplied front panel section-2 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 4-241-193-01 VOLUME ROTARY KNOB 1-796-228-11 DECK, MECH (TCM) (CRL3439) 4-236-900-01 VOL.

  • Page 35: Front Panel Section-2

    HCD-EP50LIV 3 7 63 1515 0 7-3. FRONT PANEL SECTION-2 not supplied L 13942296513 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 4-235-995-01 RUBBER FOOT 4-241-191-01 SLIDE KNOB 4-241-204-01 FRONT PANEL 4-241-190-01 BASS/SELECT KNOB A-4727-040-A HEADPHONE BOARD, COMPLETE...

  • Page 36: Cd Cabinet Section

    HCD-EP50LIV 3 7 63 1515 0 7-4. CD CABINET SECTION SW300 L 13942296513 not supplied Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 4-235-971-01 PLASTIC COVER 4-241-207-01 CD TRAY (T2) 4-236-280-01 RUBBER, VIBRATION PROOF (PINK)

  • Page 37: Electrical Parts List

    HCD-EP50LIV SECTION 8 3 7 63 1515 0 ELECTRICAL PARTS LIST DISPLAY NOTE: The components identified by • Due to standardization, replacements in the • Items marked “*” are not stocked since they 0 or dotted line with mark mark 0 are critical for safety.
  • Page 38 HCD-EP50LIV 3 7 63 1515 0 DISPLAY Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark J339 1-216-295-11 SHORT R345 1-249-417-11 CARBON 1/4W J340 1-216-295-11 SHORT R346 1-249-417-11 CARBON 1/4W J371 1-216-295-11 SHORT R347 1-216-049-11 RES-CHIP...
  • Page 39 HCD-EP50LIV 3 7 63 1515 0 DISPLAY HEADPHONE MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark SW318 1-786-224-11 SW, SLIDE (MONO STEREO, ISS) 1-126-961-11 ELECT 2.2uF < VIBRATOR/IC/ROTARY ENCODER > 1-163-037-11 CERAMIC CHIP 0.022uF 1-130-479-00 MYLAR 0.0047uF 5%...
  • Page 40 HCD-EP50LIV 3 7 63 1515 0 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 1-126-934-11 ELECT 220uF 1-126-961-11 ELECT 2.2uF C151 1-126-934-11 ELECT 220uF 1-126-961-11 ELECT 2.2uF C152 1-126-964-11 ELECT 10uF C153 1-126-934-11 ELECT...
  • Page 41 HCD-EP50LIV 3 7 63 1515 0 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark C208 1-126-934-11 ELECT 220uF CN12 1-778-310-11 PLUG, CONNECTOR 2P (AM ANT) C209 1-164-161-11 CERAMIC CHIP 0.0022uF 10% 100V CN13 1-815-968-11 CONNECTOR (F TYPE) (FM ANT)
  • Page 42 HCD-EP50LIV 3 7 63 1515 0 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 1-216-689-11 METAL CHIP 0.5% 1/10W 8-729-281-53 TRANSISTOR 2SC1815-GR 1-216-689-11 METAL CHIP 0.5% 1/10W 8-729-037-08 TRANSISTOR KTD2058Y 8-729-281-53 TRANSISTOR 2SC1815-GR 1-216-063-00 RES-CHIP 3.9K...
  • Page 43 HCD-EP50LIV 3 7 63 1515 0 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 1-216-085-00 RES-CHIP 1/10W R147 1-249-389-11 CARBON 1/4W 1-216-077-00 RES-CHIP 1/10W R148 1-216-085-00 RES-CHIP 1/10W 1-216-091-00 METAL CHIP 1/10W 1-216-091-00 METAL CHIP...
  • Page 44 HCD-EP50LIV 3 7 63 1515 0 MAIN POWER Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R204 1-216-085-00 RES-CHIP 1/10W R905 1-249-399-11 CARBON 1/4W R205 1-216-079-00 METAL CHIP 1/10W R906 1-247-883-00 CARBON 150K 1/4W R206...
  • Page 45 HCD-EP50LIV 3 7 63 1515 0 POWER Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark C605 1-164-159-21 CERAMIC 0.1uF < RELAY > C606 1-164-159-21 CERAMIC 0.1uF 0 RE601 1-755-448-11 RELAY C608 1-164-159-21 CERAMIC 0.1uF C609 1-164-159-21 CERAMIC 0.1uF...
  • Page 46 HCD-EP50LIV 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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