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SERVICE MANUAL
Ver. 1.4 2005. 10
CX-LFA500 is the Amplifier, CD player, Tape
Deck and Tuner section in XR-FA500.
TUNER
FM tuning range
FM usable sensitivity (IHF)
FM antenna terminal
AM tuning range
European model:
Other models:
AM usable sensitivity
AM antenna
AMPLIFIER
Power output
Input
Outputs
Sony Corporation
9-877-166-05
2005J16-1
Personal Audio Division
© 2005.10
Published by Sony Engineering Corporation
CX-LFA500
CD
Section
TAPE
Section
SPECIFICATIONS
CASSETTE DECK
87.5 MHz to 108 MHz
Track format
(50 kHz step)
Frequency response
Recording system
16.8 dBf
Heads
75
(unbalanced)
CD PLAYER
531-1,602 kHz
(with the tuning interval set at 9 kHz)
Laser
530-1,710 kHz
D/A converter
(with the tuning interval set at 10 kHz)
Signal-to-noise ratio
531-1,602 kHz
(with the tuning interval set at 9 kHz)
Wow and flutter
350 μV/m
Loop antenna
Rated: 16 W + 16 W(6 ohms, T.H.D.
1 %, 1 kHz/DIN 45500)
Reference: 20 W + 20 W(6 ohms,
T.H.D. 10 %, 1 kHz/DIN 45324)
MUSIC POWER
40 W + 40 W
AUX IN: 500 mV
SPEAKERS: 6 ohms or more
PHONES: 32 ohms or more
MICRO HI-FI COMPONENT SYSTEM
Australian Model
Model Name Using Similar Mechanism
CD Mechanism Type
Base Unit Name
Optical Pick-up Name
Model Name Using Similar Mechanism
Tape Transport Mechanism Type
4 tracks, 2 channels stereo
50 Hz – 10000 Hz
AC bias
Recording/playback × 1, erase × 1
Semiconductor laser ( = 780 nm)
Emission duration: continuous
1 bit dual
80 dB (1 kHz, 0 dB)
Unmeasurable
AEP Model
UK Model
E Model
NEW
CDM55A-K6BD44B
BU-K1BD44B
KSM-213D
NEW
CMAL1Z222B
— Continued on next page —
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Summary of Contents for Sony CX-LFA500
- Page 1 SERVICE MANUAL AEP Model UK Model Ver. 1.4 2005. 10 E Model Australian Model CX-LFA500 is the Amplifier, CD player, Tape Deck and Tuner section in XR-FA500. Model Name Using Similar Mechanism CD Mechanism Type CDM55A-K6BD44B Section Base Unit Name...
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Page 2: Table Of Contents
CX-LFA500 Ver 1.2 2003.11 TABLE OF CONTENTS 1. SERVICING NOTES GENERAL ······················································· 3 Power requirements European model: 230 V AC, 50/60 Hz 2. GENERAL ·········································································· 5 Singaporeand 220 V + 240 V AC, 50/60 Hz Australian models: 220-240 V AC, 50/60 Hz 3. -
Page 3: Servicing Notes
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 4 CX-LFA500 Service Position of the CD Mechanism Deck Service Position of the Tape Cassette Mechanism Deck...
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Page 5: General
CX-LFA500 SECTION 2 GENERAL This section is extracted from instruction manual. PARTS AND CONTROLS 5 ECD (7-9) Main unit: front Main unit: rear Starts and pauses CD play. Refer to the pages indicated in parentheses for details. Refer to the pages indicated in parentheses for details. -
Page 6: Adjustments Before Operation
CX-LFA500 ADJUSTMENTS BEFORE OPERATION Setting the clock POWER ECD, POWER 6STANDBY/ON TUNER/ 1 In stop mode, hold down SHIFT and press CLOCK BAND, on the remote. dTAPE, CLOCK Go to step 3 when the hour of the clock display flashes. -
Page 7: Disassembly
CX-LFA500 Ver 1.2 2003.11 SECTION 3 DISASSEMBLY • This set can be disassembled in the order shown below. TOP CABINET, REAR PANEL FRONT PANEL ASSY CD MECHANISM DECK CONTROL BOARD, (CDM55A-K6BD44B) SINGLE CASSETTE MECHANISM MAIN BOARD, LOADING BOARD CD BOARD... -
Page 8: Front Panel Assy
CX-LFA500 3-2. Front Panel Assy 2 four s crews (+BVTP 3 × 10) 5 connector 5p (CN1) 4 w ire (flat type) 25p (CN302) 8 front panel assy 6 connector 6p 3 w ire (flat type) 12p (CN305) 7 connector 5p (CN201) 1 two s crews (+KTP 3 ×... -
Page 9: Cd Mechanism Deck (Cdm55A-K6Bd44B)
CX-LFA500 3-4. CD Mechanism Deck (CDM55A-K6BD44B) 3 s crew (+BVTP 3 × 10) 6 CD door assy 7 CD mechanism deck (CDM55A-K6BD44B) 2 w ire (flat type) 21p (CN303) 5 CD holder 1 s crew (+BVTP 3 × 10) 3-5. MAIN Board, POWER Board 7 four s crews (+BVTP 3 ×... -
Page 10: Loading Board
CX-LFA500 3-6. LOADING Board Remove the belt. 4 motor (LD) assy (M901) Remove soldering from the two points. LOADING board 2 two screws (+BTP 2.6 × 6) 3-7. CD Board 1 screw(+P 2.6 × 5) wire (flat type) 21p (CN101) -
Page 11: Tray (Cdm55D)
CX-LFA500 Ver 1.2 2003.11 3-8. Tray (CDM55D) 1 While pressing the two protrusions A and B to unlock the two claws as shown, pull the tray in the direction of the arrow C . (Be careful of the claws.) claw... - Page 12 CX-LFA500 MEMO...
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Page 13: Mechanical Adjustments
CX-LFA500 SECTION 4 MECHANICAL ADJUSTMENTS Precaution Clean the following parts with a denatured alcohol-moistened swab: record/playback heads pinch rollers erase head rubber belts capstan idlers Demagnetize the record/playback head with a head demag- netizer. Do not use a magnetized screwdriver for the adjustments. -
Page 14: Electrical Adjustments
CX-LFA500 SECTION 5 ELECTRICAL ADJUSTMENTS Mode: Playback DECK SECTION 0 dB=0.775V test tape Demagnetize the record/playback head with a head demagnetizer. P-4-A100 MAIN board (10kHz, –10dB) J203 Do not use a magnetized screwdriver for the adjustments. speaker terminal oscilloscope After the adjustments, apply suitable locking compound to the parts adjusted. - Page 15 CX-LFA500 RFDC signal waveform CD SECTION VOLT/DIV: 200 mV TIME/DIV: 500 ns Note: 1. CD Block is basically designed to operate without adjustment. There- fore, check each item in order given. 2. Use YEDS-18 disc (3-702-101-01) unless otherwise indicated. level: 0.7 ± 0.2 Vp-p 3.
- Page 16 CX-LFA500 E-F Balance Check Checking Location: Connection: – CD BOARD (Conductor Side) – oscilloscope CD board TP (TE) TP (DVC) – Procedure: Connect an oscilloscpe to test point TP (TE) and TP (DVC) on TP (VC) the CD board. AC is put in pushing CD button.
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Page 27: Ic Block Diagrams
CX-LFA500 • IC Block Diagrams – CD Board – IC101 CXD3017Q ERROR DIGITAL CORRECTOR DIGITAL ASYMMETRY CORRECTOR OPERATIONAL LRCK AMPLIFIER ANALOG SWITCH PCMD INTERFACE DEMODULATOR CONVERTER EMPH XVDD XTAI TIMING CLOCK XTAO LOGIC XTSL GENERATOR XVSS TES1 AVDD1 TEST AOUT1... - Page 28 CX-LFA500 IC103 CXA2581N-T4 RW/ROM DC OFST RFDCI – – RFDCO – RW/ROM VOFST APC AMP EQ ON/OFF RFAC EQ IN RW/ROM RFAC AC SUM SUMMING VOFST – – RW/ROM TE BAL RW/ROM – APC-OFF RW/ROM (Hi-Z) RW/ROM RW/ROM (H/L) DVCC VOFST –...
- Page 29 CX-LFA500 – MAIN Board – IC301 BD3881FV – CONTROL Board – IC604 BA6956AN CONTROL LOGIC IC603 PST3445UL...
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Page 30: Ic Pin Function Description
CX-LFA500 6-11. IC Pin Function Description IC601 LC876764C-51E3 System Control (CONTROL Board) Pin No. Pin Name Description C-PWM1 PWM1 signal output to the CD unit C-PWM2 PWM2 signal output to the CD unit C-SCOR SCOR (SUBQ request) signal output to the CD unit... - Page 31 CX-LFA500 Pin No. Pin Name Description R-CE Tuner chip enable signal output to the tuner C-XRST Reset signal output to the CD unit C-XLT Latch signal output to the CD unit C-DATA Data output to the CD unit C-SQCK SUBQ clock output to the CD unit VSS2 —...
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Page 32: Exploded Views
CX-LFA500 Ver 1.1 2003.07 SECTION 7 EXPLODED VIEWS NOTE: • -XX, -X mean standardized parts, so they may • The mechanical parts with no reference number : Singapore model have some differences from the original one. in the exploded views are not supplied. -
Page 33: Front Section
CX-LFA500 Ver 1.3 2004.09 7-2. Front Section supplied supplied supplied supplied supplied Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark A-4737-496-A HOLDER CASSETTE ASSY (X) 4-245-219-01 BUTTON,FUNCTION 4-238-631-01 TAPE SPRING 4-245-222-01 BUTTON,CD 4-247-757-01 SPR-T,CASS 4-231-841-01 SPRING (HEART CAM-B) -
Page 34: Chassis Section
CX-LFA500 Ver. 1.4 7-3. Chassis Section not supplied not supplied not supplied PT801 not supplied not supplied not supplied Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 4-247-752-01 RUBBER, FOOT 0 PT801 1-439-658-11 TRANSFORMER, POWER (AEP,UK,KR) -
Page 35: Cd Mechanism Deck Section
CX-LFA500 Ver 1.2 2003.11 7-4. CD Mechanism Deck Section not supplied not supplied not supplied M901 optical pick-up section (KSM-213D) Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 1-674-336-12 LOADING BOARD A-473-508-2A MAGNET 4-925-315-31 DAMPER 4-231-777-02 SHEET (KH2) -
Page 36: Optical Pick-Up Section (Ksm-213D)
CX-LFA500 Ver 1.2 2003.11 7-5. OPTICAL PICK-UP SECTION (KSM-213D) Ref. No. Part No. Description Remark 0 601 A-4735-357-A BASE ASSY, OP (KSM-213D) The components identified by mark 0 or dotted line with mark 0 are critical for safety. Replace only with part number specified. -
Page 37: Electrical Parts List
CX-LFA500 SECTION 8 Ver 1.1 2003.07 ELECTRICAL PARTS LIST NOTE: • Due to standardization, replacements in the parts • RESISTORS • Abbreviation list may be different from the parts specified in All resistors are in ohms. AUS : Australian model the diagrams or the components used on the set. - Page 38 CX-LFA500 Ver 1.1 2003.07 CONTROL Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks R122 1-216-845-11 METAL CHIP 100K 1/10W C612 1-104-662-11 ELECT 22uF 20.00% 25V R123 1-216-833-11 METAL CHIP 1/10W C613 1-164-156-11 CERAMIC CHIP 0.1uF R124...
- Page 39 CX-LFA500 Ver 1.1 2003.07 CONTROL Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks D602 8-719-911-19 DIODE 1SS133T-72 R611 1-216-809-11 METAL CHIP 1/10W D603 8-719-059-98 DIODE SLR-342VCT31 (ECO) R612 1-249-429-11 CARBON 1/4W D604 8-719-911-19 DIODE 1SS133T-72 R613...
- Page 40 CX-LFA500 Ver 1.1 2003.07 CONTROL LOADING MAIN Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks R672 1-216-841-11 METAL CHIP 1/10W R735 1-249-417-11 CARBON 1/4W F R674 1-216-833-11 METAL CHIP 1/10W R736 1-216-821-11 METAL CHIP 1/10W R737...
- Page 41 CX-LFA500 MAIN Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks C218 1-164-343-91 CERAMIC CHIP 0.056uF C345 1-104-665-11 ELECT 100uF 20.00% 10V C219 1-164-156-11 CERAMIC CHIP 0.1uF C351 1-126-963-11 ELECT 4.7uF 20.00% 50V C220 1-164-156-11 CERAMIC CHIP 0.1uF...
- Page 42 CX-LFA500 MAIN Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks CN302 1-779-562-21 CONNECTOR,FFC(LIF(NON-ZIF))25P < COIL > CN303 1-779-289-11 CONNECTOR, FFC 21P CN304 1-784-867-21 CONNECTOR, FFC(NON-ZIF)15P L201 1-456-107-11 COIL, K (MDEC) L202 1-456-107-11 COIL, K (MDEC) CN305...
- Page 43 CX-LFA500 MAIN Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks Q406 8-729-120-28 TRANSISTOR 2SC3052F-T1-LF R265 1-216-821-11 METAL CHIP 1/10W Q407 6-550-296-01 TRANSISTOR 2SA1980G Q408 8-729-216-22 TRANSISTOR 2SA1162-G R266 1-216-822-11 METAL CHIP 1.2K 1/10W Q409 8-729-230-49 TRANSISTOR...
- Page 44 CX-LFA500 Ver 1.1 2003.07 MAIN PHONE POWER Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks R334 1-216-829-11 METAL CHIP 4.7K 1/10W R415 1-216-844-11 METAL CHIP 1/10W R336 1-216-815-11 METAL CHIP 1/10W R416 1-216-807-11 METAL CHIP 1/10W...
- Page 45 CX-LFA500 Ver 1.2 2003.11 POWER Ref. No. Part No. Description Remarks < DIODE > D801 8-719-991-34 DIODE 1SS133T-72 D802 8-719-991-34 DIODE 1SS133T-72 D803 8-719-991-34 DIODE 1SS133T-72 D804 8-719-991-34 DIODE 1SS133T-72 < LINE FILTER > L801 1-402-663-11 LINE FILTER (LFT) < TRANSFORMER >...