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Sony HCD-LS1 Service Manual
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Sony HCD-LS1 Service Manual

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SERVICE MANUAL
HCD-LS1 is the Amplifier, CD player and
Tuner section in CMT-LS1.
Amplifier section
For the U.S. model
AUDIO POWER SPECIFICATIONS
POWER OUTPUT AND TOTAL HARMONIC
DISTORTION:
With 4 ohm loads both channels driven, from 120 –
10,000 Hz; rated 10 watts per channel minimum
RMS power, with no more than 10% total
harmonic distortion from 250 milliwatts to rated
output.
North American model:
Continuous RMS power output (Reference)
European model:
DIN power output (Rated) 11 + 11 watts
Continuous RMS power output (Reference)
Other models:
DIN power output (Rated) 11 + 11 watts
Continuous RMS power output (Reference)

SPECIFICATIONS

CD player section
16 + 16 watts
System
(4 ohms at 1 kHz, 10% THD)
Laser
Laser output
(4 ohms at 1 kHz, DIN)
16 + 16 watts
(4 ohms at 1 kHz, 10% THD)
Frequency response
(4 ohms at 1 kHz, DIN, 240 V)
11 + 11 watts
(4 ohms at 1 kHz, DIN, 220 V)
16 + 16 watts
(4 ohms at 1 kHz, 10% THD,
240 V)
16 + 16 watts
(4 ohms at 1 kHz, 10% THD,
220 V)
HCD-LS1
Model Name Using Similar Mechanism
CD Mechanism Type
Optical Pick-up Name
Inputs
TAPE IN (stereo mini jack):
voltage 250 mV, impedance
47 kilohms
Outputs
TAPE OUT (stereo mini jack):
1Vrms at CD Full Bit Play,
impedance 1 kilohm
CD OUT: Optical
PHONES (stereo mini jack):
accepts headphones of 8 ohms or
more
SPEAKER: speaker system
4 ohms
Compact disc and digital audio
system
Semiconductor laser (λ=780 nm)
Emission duration: continuous
Max. 44.6 µW*
*This output is the value measured
at a distance of 200 mm from the
objective lens surface on the
Optical Pick-up Block with 7 mm
aperture.
20 Hz – 20,000 Hz (±3.0 dB)
COMPACT DISC RECEIVER
US Model
Canadian Model
AEP Model
UK Model
E Model
NEW
HG-1
KSS-540A
– Continued on next page –

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  • Page 1: Specifications

    HCD-LS1 SERVICE MANUAL US Model Canadian Model AEP Model UK Model E Model HCD-LS1 is the Amplifier, CD player and Tuner section in CMT-LS1. Model Name Using Similar Mechanism CD Mechanism Type HG-1 Optical Pick-up Name KSS-540A SPECIFICATIONS Amplifier section...

  • Page 2: Table Of Contents

    OPERATION. REPLACE THESE COMPONENTS WITH DE FONCTIONNEMENT. NE REMPLACER CES COM- SONY PARTS WHOSE PART NUMBERS APPEAR AS POSANTS QUE PAR DES PIÈCES SONY DONT LES SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUB- NUMÉROS SONT DONNÉS DANS CE MANUEL OU LISHED BY SONY.

  • Page 3: Servicing Notes

    SECTION 1 SERVICING NOTES SAFETY CHECK-OUT NOTES ON HANDLING THE OPTICAL PICK-UP After correcting the original service problem, perform the follow- BLOCK OR BASE UNIT ing safety check before releasing the set to the customer: The laser diode in the optical pick-up block may suffer electro- Check the antenna terminals, metal trim, “metallized”...
  • Page 4 DISC EJECTION IN EMERGENCY Top Cover Fastening Screws In case of emergency, remove the discs inside the Mechanism Ass’y (CD Changer) as follows: (1) Disconnect the power of the Main Unit. (2) Remove the Mechanism Ass’y. Refer to item (3) Remove two top cover fastening screws at the rear of the Mechanism Ass’y, and take off the Top Cover HS Ass’y.

  • Page 5: General

    SECTION 2 GENERAL • LOCATION OF CONTROLS – Front View – 1 FUNCTION button 1 2 3 4 5 6 7 2 DISC 1 button and indicator 3 DISC 2 button and indicator 4 DISC 3 button and indicator 5 DISC 4 button and indicator 6 DISC 5 button and indicator 7 VOLUME + button 8 TUNER/BAND button...
  • Page 6 This section is extracted from instruction manual. Step 2: Setting the time Press +/– to set the minute then press ENTER. The clock starts. You must set the time before you can use the timer functions. The clock is on a 24-hour system for the European To change the time model, and a 12-hour system for other models.

  • Page 7: Disassembly

    SECTION 3 DISASSEMBLY Note: Follow the disassembly procedure in the numerical order given. MAIN CASE SECTION 7 FFC (26core) (CN604) 6 two claws 5 two screws (BTP 3 × 10) 8 two connectors 5 two screws (PC501, 502) (BTP 3 × 10) 3 belt 9 main case section 2 bottom cover...
  • Page 8 DOOR MOTOR ASS’Y (M391) 1 connector (CN391) 7 door motor ass’y (M391) 6 motor bracket 2 two screws (BTP3 × 8) 5 two screws 3 lug (P2.6 × 3) MAIN BOARD Note: On installation MAIN board 1 FFC (15core) adjust the S391 and slide knob. (CN101) slide knob S391...
  • Page 9 HOLDER MECHA, DUST SEAL EMA SL 1 four screws (B3 × 5) 3 dust seal EMA SL Note: Carefully remove it since it is used again later. 2 holder mecha 1 four screws (B3 × 5) 2 holder mecha PRECAUTIONS ON DISASSEMBLING AND REASSEMBLING MECHANISM DECK When disassembling and reassembling the mechanism deck by any failure, the mechanism deck must be in (2) Standard state (STOP state) as shown below.
  • Page 10 TOP COVER HS ASS’Y, BOTTOM COVER MF ASS’Y, F PANEL ASS’Y R237 2 Remove top cover HS ass’y 1 two screws in the direction of arrow A. (P2.6 × 3) 5 F panel ass’y R237 4 Remove bottom cover MF ass’y in the direction of arrow B.
  • Page 11 MAIN R237 BOARD 6 pick-up flexible board (CP101) LOADING MF ASS’Y Note: When disconnecting these felxible boards, (Next Page) do not open the MAIN R237 board wide to STC POS GEAR SL avoid damage to flexible boaards. (Page 18) 1 screw (P2.6 ×...
  • Page 12 LOADING MF ASS’Y Note: Though the cam of the Mecha UD sub cam SL will be in (1) state in (Refer to page 9. Fig. A) when the loading MF Ass’y is assembled, set in (2) state in (Refer to page 9. Fig. A) using the emergency gear SL.
  • Page 13 MOTOR (SLED) (M1) 2 washer 3 second gear 4 two screws (P1.7 × 2.5) 1 Remove two solders of the sled motor leads (M1). 5 first gear Note: When first gear is removed, make sure to install a bland new gear. 6 motor (sled) (M1) Note: Pay attention to the motor (sled)
  • Page 14 OPTICAL PICK-UP KSS-540A 1 two screws (P1.7 × 4) 4 PU guide shaft SL 3 two SH lock plate SLs 6 optical pick-up KSS-540A 2 screw (P2.6 × 3) 5 pick-up flexible board 3 two SH lock plate SLs Note: Before disconnecting the pick-up flexible board from the optical pick-up 2 screw KSS-540A, short the laser diode...
  • Page 15 PU G PLATE H SL Note: Assemble with tighten screw in the order of 3 to 1. 3 screw (2 × 4) 2 screw (2 × 4) 1 screw (2 × 4) 4 PU G plate H SL PCB FLEX MECHA ASS’Y 2 two screws (P2 ×...
  • Page 16 UD LINK ARM SL 1 washer 2 UD link arm SL MOTOR CHASSIS SL ASS’Y Note: When reassembling motor chassis SL ass’y with the 2 screws, DO NOT let its Emergency Gear SL Teach touch the edge of the MA chassis SL S ass’y MA chassis SL ass’y as they can be broken.
  • Page 17 DISC LOCK ARM SL 1 Apply sellotape to the disc lock SL ass’y as shown in figure to prevent the disc lock from falling off while removing the disc arm SL. 2 washer 3 disc lock arm SL sellotape disc lock SL ass’y (Fig.
  • Page 18 STC POS GEAR SL Note: DO NOT remove the STC POS Gear SL together with the STC Motor SL Ass’y (Stocker) (M3), always replace it alone. POSITIONING OF THE STC POS GEAR SL REQUIRED If they are removed at the same time and the gear in the stocker height becomes out of position.

  • Page 19: Electrical Adjustment

    SECTION 4 ELECTRICAL ADJUSTMENT Forcus Bias Adjustment Adjustment Location: Note: – MAIN R237 BOARD (Conductor Side) – 1. CD Block is basically designed to operate without adjustment. 2. Use YEDS-18 disc (3-702-101-01) 3. Use an oscilloscope with more than 10 MΩ impedance. 4.
  • Page 20 MEMO...

  • Page 21: Diagrams

    SECTION 5 DIAGRAMS 5-1. NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS • Circuit Boards Location Note on Printed Wiring Board: Note on Schematic Diagram: • X : parts extracted from the component side. • All capacitors are in µF unless otherwise noted. pF: µµF •...

  • Page 22: Printed Wiring Board - Cd Section

    HCD-LS1 5-2. PRINTED WIRING BOARD – CD Section – • See page 21 for Circuit Boards Location. (Page 26) (Page 30) (Page 26) (Page 26) MAIN R237 BOARD (COMPONENT SIDE) MAIN R237 BOARD (CONDUCTOR SIDE) C401 CP503 CP501 CP502 C402...

  • Page 23: Schematic Diagram - Cd Section (1/3)

    HCD-LS1 5-3. SCHEMATIC DIAGRAM – CD Section (1/3) – • See page 33 for Waveforms. • Semiconductor Location Ref. No. Location D101 J-12 D102 D401 B-12 D404 B-11 D406 E-15 D409 C-11 D516 B-13 D517 B-12 D521 D-11 D801 C-11...

  • Page 24: Schematic Diagram - Cd Section (2/3)

    HCD-LS1 5-4. SCHEMATIC DIAGRAM – CD Section (2/3) – • See page 33 for Waveforms. • See page 36 for IC Block Diagram. (Page 27) (Page 27) (Page 27) (Page 23) (Page 25) • Voltages and waveforms are dc with respect to ground under no-signal conditions.

  • Page 25: Schematic Diagram - Cd Section (3/3)

    HCD-LS1 5-5. SCHEMATIC DIAGRAM – CD Section (3/3) – • See page 33 for Waveform. (Page 24) (Page 31) • Voltages and waveforms are dc with respect to ground under no-signal conditions. no mark : CD PLAY...

  • Page 26: Printed Wiring Board - Main Section

    HCD-LS1 5-6. PRINTED WIRING BOARDS – MAIN Section – • See page 21 for Circuit Boards Location. • Semiconductor Location Ref. No. Location MAIN BOARD D200 D251 1 2 3 4 5 S391 D252 S392 6 7 8 9 10...

  • Page 27: Schematic Diagram - Main Section

    HCD-LS1 5-7. SCHEMATIC DIAGRAM – MAIN Section – • See page 33 for Waveform. • See page 36 for IC Block Diagram. (Page 24) (Page 31) (Page 24) (Page 24) (Page 35) (Page (Page 35) (Page 29) • Voltages and waveforms are dc with respect to ground The components identified by mark 0 or dotted Les composants identifiés par une marque 0 sont...

  • Page 28: Printed Wiring Boards - Amp/Relay/Jack Board

    HCD-LS1 5-8. PRINTED WIRING BOARDS – AMP/RELAY/JACK Board – • See page 21 for Circuit Boards Location. • Semiconductor Location Ref. No. Location AMP BOARD (COMPONENT SIDE) RELAY BOARD (COMPONENT SIDE) D201 D202 D203 D204 F-10 C951 D205 D206 C952...

  • Page 29: Schematic Diagram - Amp/Relay/Jack Board

    HCD-LS1 5-9. SCHEMATIC DIAGRAM – AMP/RELAY/JACK Board – (Page 35) (Page 27) (Page • Voltages are dc with respect to ground under no-signal (detuned) conditions. no mark : TUNER (FM/AM) The components identified by mark 0 or dotted Les composants identifiés par une marque 0 sont line with mark 0 are critical for safety.

  • Page 30: Printed Wiring Boards - Panel Section (1/2)

    HCD-LS1 5-10. PRINTED WIRING BOARDS – PANEL Section (1/2) – • See page 21 for Circuit Boards Location. • Semiconductor Location Ref. No. Location D601 FRONT BOARD D602 D603 D604 LED601 LED602 D605 LED601, 603 D606 LED602, 604 (LCD BACK LIGHT)

  • Page 31: Schematic Diagram - Panel Section (1/2)

    HCD-LS1 5-11. SCHEMATIC DIAGRAM – PANEL Section (1/2) – • See page 33 for Waveform. • See page 36 for IC Block Diagram. (Page 27) (Page 25) (Page • Voltages and waveforms are dc with respect to ground under no-signal (detuned) conditions.

  • Page 32: Printed Wiring Boards - Panel Section (2/2)

    HCD-LS1 5-12. PRINTED WIRING BOARDS – PANEL Section (2/2) – • See page 21 for Circuit Boards Location. 5-13. SCHEMATIC DIAGRAM – PANEL Section (2/2) – LED651-656 S601-614 TACT SW BOARD LED651 LED652 LED653 LED654 LED655 R652 R651 R653 R654...
  • Page 33 • Waveforms – MAIN R237 Board – – MAIN Board – – FRONT Board – 1 U101 8 (TE), U102 ra (TE) 1 IC103 qd (XI) 1 IC601 qj (X2) (CD Play Mode) Approx. 3.2 Vp-p 5.2 Vp-p 140 m Vp-p 4.332 MHz 5 MHz 2 U101 q;...

  • Page 34: 5-14. Printed Wiring Boards - Power Supply Section

    HCD-LS1 5-14. PRINTED WIRING BOARDS – POWER SUPPLY Section – • See page 21 for Circuit Boards Location. • Semiconductor Location Ref. No. Location POWER SUPPLY BOARD (COMPONENT SIDE) (COMPONENT SIDE) AC BOARD 1-678-395- (Page 26) (Page 26) (Page 28)

  • Page 35: Schematic Diagram - Power Supply Section

    HCD-LS1 5-15. SCHEMATIC DIAGRAM – POWER SUPPLY Section – • See page 36 for IC Block Diagram. (Page 29) (Page 27) (Page 27) • Voltages are dc with respect to ground under no-signal (detuned) conditions. no mark : TUNER (FM/AM) ∗...
  • Page 36 • IC Block Diagrams – MAIN Board – – MAIN R237 Board – IC103 BU1924F (AEP, UK models) U102 CXD2587Q 12 11 10 CLOCK TEST ERROR DIGITAL PLL 57kHz CORRECTOR ASYMMETRY DIGITAL RDS/ARI CORRECTION OPERATIONAL 1187.5Hz LRCK COMPARATOR AMPLIFIER ANALOG SWITCH PCMD INTERFACE DEMODULATOR...

  • Page 37: Exploded Views

    SECTION 6 EXPLODED VIEWS NOTE: • -XX and -X mean standardized parts, so they • Items marked “*” are not stocked since they The components identified by mark 0 or dotted line with mark may have some difference from the original are seldom required for routine service.
  • Page 38 (2) BOTTOM CASE SECTION supplied D706 D707 D708 not supplied D801 D705 not supplied supplied supplied supplied not supplied M391 not supplied supplied supplied not supplied not supplied not supplied Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 4-229-265-01 MECHA, HOLDER...
  • Page 39 (3) MECHANISM DECK SECTION-1 (HG-1: MAIN SECTION) Loading MF ass’y Traverse mecha ass’y Motor chassis SL ass’y Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 4-229-348-01 F PANEL ASSY R237 STC SCREW NUT A SL 4-229-314-01 PCB FLEX MECHA ASSY 4-229-320-01 STC SPRING B SL 4-229-318-01 MECH UD SUB CAM SL 4-229-317-01 STC SP CAP A SL...
  • Page 40 (4) MECHANISM DECK SECTION-2 (HG-1: MOTOR CHASSIS SL ASS’Y) Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 4-229-306-01 EMERGENCY GEAR SL 4-229-303-01 LDG WORM GEAR SL 4-229-308-01 BRACKET SCREW SL 4-229-304-01 LDG SENSOR RING SL 4-229-311-01 WASHER UD CAM GUIDE SL 4-229-301-01 MECHA UD GEAR SL 4-229-299-01 UD CAM SL...
  • Page 41 (5) MECHANISM DECK SECTION-3 (HG-1: TRAVERSE MECHA ASS’Y) The components identified by Les composants identifiés par une mark 0 or dotted line with marque 0 sont critiques pour la mark 0 are critical for safety. sécurité. Replace only with part num- Ne les remplacer que par une pièce ber specified.
  • Page 42 (6) MECHANISM DECK SECTION-4 (HG-1: LOADING MF ASS’Y) Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 4-229-188-01 SHUT ARM SHAFT SL 4-229-200-01 DISC CRAMP BASE 4-229-193-01 SHUTTER ARM SL 4-229-198-01 STEEL RING 4-229-187-01 SHUT ARM CUSH SL 4-229-294-01 WASHER LOADING CHASSIS SL ASSY 4-229-185-01 LDG LINK SL ASSY...

  • Page 43: Electrical Parts List

    SECTION 7 ELECTRICAL PARTS LIST NOTE: • Due to standardization, replacements in the • Items marked “*” are not stocked since they The components identified by mark 0 or dotted line with mark are seldom required for routine service. parts list may be different from the parts speci- 0 are critical for safety.
  • Page 44 DOOR SW FRONT Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R504 1-216-222-00 RES, CHIP 1/8W < DIODE > R505 1-216-230-00 RES, CHIP 1/8W D601 8-719-200-02 DIODE 1N4002 R506 1-216-230-00 RES, CHIP 1/8W D602 8-719-200-02 DIODE 1N4002 R507 1-216-220-00 RES, CHIP 8.2K...
  • Page 45 FRONT JACK MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R620 1-216-065-00 RES, CHIP 4.7K 1/10W C554 1-163-129-00 CERAMIC CHIP 330PF R621 1-249-429-11 CARBON 1/4W C555 1-163-133-00 CERAMIC CHIP 470PF R622 1-249-429-11 CARBON 1/4W C556 1-163-133-00 CERAMIC CHIP 470PF R623...
  • Page 46 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark C157 1-124-589-11 ELECT 47uF (AEP, UK) C308 1-125-972-91 ELECT 100uF C158 1-163-135-00 CERAMIC CHIP 560PF C309 1-164-004-11 CERAMIC CHIP 0.1uF (AEP, UK) C310 1-163-037-11 CERAMIC CHIP 0.022uF C312 1-125-972-91 ELECT 100uF...
  • Page 47 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark D254 8-719-991-33 DIODE 1SS133T-77 R144 1-216-025-00 RES, CHIP 1/10W D304 8-719-109-97 DIODE RD6.8ESB2 (AEP, UK) R145 1-216-025-00 RES, CHIP 1/10W D312 8-719-991-33 DIODE 1SS133T-77 (AEP, UK) D316 8-719-991-33 DIODE 1SS133T-77 R201 1-216-077-00 RES, CHIP...
  • Page 48 MAIN MAIN R237 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R314 1-216-073-00 METAL CHIP 1/10W < VIBRATOR > R315 1-216-097-00 RES, CHIP 100K 1/10W R316 1-216-065-00 RES, CHIP 4.7K 1/10W X102 1-781-919-11 X TAL (4.332MHz) (AEP, UK) R317 1-216-073-00 METAL CHIP 1/10W...
  • Page 49 MAIN R237 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark C169 1-163-251-11 CERAMIC CHIP 100PF < SHORT > C401 1-126-767-11 ELECT 1000uF C402 1-163-038-00 CERAMIC CHIP 0.1uF J404 1-216-295-00 SHORT C403 1-124-584-00 ELECT 100uF C404 1-163-038-00 CERAMIC CHIP 0.1uF <...
  • Page 50 MAIN R237 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R418 1-216-049-11 RES, CHIP 1/10W R115 1-216-073-00 METAL CHIP 1/10W R419 1-216-105-00 RES, CHIP 220K 1/10W R116 1-216-097-00 RES, CHIP 100K 1/10W R420 1-216-121-00 RES, CHIP 1/10W R117 1-216-121-00 RES, CHIP...
  • Page 51 MAIN R237 PHOTO JACK POWER SUPPLY Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark A-4473-562-A PHOTO JACK BOARD, COMPLETE R709 1-216-049-11 RES, CHIP 1/10W *************************** R710 1-216-049-11 RES, CHIP 1/10W R711 1-216-049-11 RES, CHIP 1/10W < CAPACITOR > R712 1-216-049-11 RES, CHIP 1/10W...
  • Page 52 POWER SUPPLY POWER SW RELAY Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 1-117-703-11 CERAMIC 0.0047uF 250V 1-249-431-11 CARBON 1/4W 1-249-415-11 CARBON 1/4W < DIODE > 1-249-421-11 CARBON 2.2K 1/4W 1-249-424-11 CARBON 3.9K 1/4W 8-719-070-53 DIODE 11E4-TA1B2 8-719-070-53 DIODE 11E4-TA1B2 1-247-881-00 CARBON 120K...
  • Page 53 RELAY TACT SW Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark < RESISTOR > S604 1-572-595-11 SWITCH, TACTIL (REFLOW TYPE) (DISC 3) S605 1-572-595-11 SWITCH, TACTIL (REFLOW TYPE) (DISC 4) R509 1-216-222-00 RES, CHIP 1/8W R510 1-216-222-00 RES, CHIP 1/8W S606...
  • Page 54 HCD-LS1 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 7-627-852-08 SCREW, PRECISION +P 1.7X2.5 7-621-775-08 SCREW +P 2.6X3 7-621-284-30 SCREW +P 2.6X8 7-621-259-25 SCREW +P 2.6X4 7-627-850-08 SCREW, PRECISION +P 1.4X2 7-627-852-18 SCREW, PRECISION +P 1.7X4 TYPE3...

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