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HCD-LX7/LX8 SERVICE MANUAL AEP Model UK Model HCD-LX7 E Model Australian Model HCD-LX8 HCD-LX7/LX8 is the tuner, deck, CD and amplifier section in LBT-LX7/LX8. Photo: HCD-LX8 Model Name Using Similar Mechanism HCD-DR4/XB500 CD Mechanism Type CDM37M-5BD32L SECTION Base Unit Type...
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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.
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MODEL IDENTIFICATION — BACK PANEL — MODEL PARTS No. LX7: AEP, UK, CIS model 4-225-529-1s LX8: E, AR model 4-225-529-2s LX8: SP, MY model 4-225-529-3s LX8: MX model 4-225-529-4s Parts No. LX8: AUS model 4-225-529-5s LX8: EA model 4-225-529-6s • Abbreviation : Singapore model : Mexican model AUS : Australian model...
SECTION 1 SERVICING NOTE About CD-TEXT display This unit is provided with a simple CD-TEXT display function. The CD-TEXT contents of 20 tracks are displayed on the fluorescent display tube. Since the function is simple, some special characters may not be displayed, or may be displayed as other characters. MC Cold Reset •...
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AMS Test Mode • This mode is used for checking the AMS operations of the tape deck. 7-819-039-12 Alignment tape, AMS-110A Procedure: 1. Press the "/1 button to turn the set ON. 2. Set the tape (AMS-110A). 3. Press the three buttons c/CLOCK SET , ENTER , and DISC 3 button simultaneously. 4.
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• CD 1. The tray rotates. 2. DISC 1 is chucked. 3. The TOC is read. 4. The first track is played for 2 seconds. 5. The last track is played for 2 seconds. 6. The tray rotates. 7. DISC 4 is chucked. 8.
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Display E@@M#***** @@ : Error number. 00 is the newest. : Operating state of table : Currently in the INITIAL mode : Currently rotating to the right : Currently rotating to the left : Currently chucking down : Currently chucking up : Invalid •...
SECTION 2 GENERAL Front Panel 10 11 12 25 26 55 56 30 31 32 33 Photo : HCD-LX8...
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LOCATION OF PARTS AND CONTROLS 1 "/1 (Power) button and indicator 51 LOOP button 26 H (B Deck) button and indicator 2 c/CLOCK SET button 27 x (B Deck) button 52 DIRECTION button 3 SLEEP button 53 DOLBY NR button 28 m (B Deck) button 4 REC button and indicator 54 x (A Deck) button...
3-6. CD MECHANISM DECK 3-7. BASE UNIT 1Five screws (BVTP3x8) 2CD mechanism deck 3Base unit 2Boss 1Yoke fitting 3-8. DISC TABLE Note: When the disc table is installed, adjust the positions of roller cam and mark B as shown in the figure, then set to the groove of disc table.
SECTION 4 SECTION 5 MECHANICAL ADJUSTMENTS ELECTRICAL ADJUSTMENTS Precaution DECK SECTION 0 dB=0.775V 1. Clean the following parts with a denatured alcohol-moistened swab: 1. Demagnetize the record/playback head with a head demagnetizer. record/playback heads pinch rollers 2. Do not use a magnetized screwdriver for the adjustments. erase head rubber belts 3.
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3. Mode: Playback Tape Speed Adjustment (Deck A) test tape Note: Set the test mode using the following method and begin tape P-4-A100 main board CN301 speed adjustment. (10kHz, –10dB) Pin 3 (L-ch) In the test mode, the speed will switch to double speed or oscilloscope normal speed each time the HI-SPEED DUB button is pressed.
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Record Bias Adjustment (Deck B) Record Level Adjustment (Deck B) Procedure: Procedure: INTRODUCTION INTRODUCTION When set to the test mode performed in Tape Speed Adjust- When set to the test mode performed in Tape Speed Adjust- ment, when the tape is rewound after recording, the “REC memory ment, when the tape is rewound after recording, the “REC memory mode”...
HCD-LX7/LX8 SECTION 6 DIAGRAMS E-F Balance (1 Track Jump) check 6-1. CIRCUIT BOARDS LOCATION CD SECTION oscilloscope SUB TRANS board (LX7) Note: BD board 1. CD Block is basically constructed to operate without adjustment. TUNER UNIT Therefore, check each item in order given.
HCD-LX7/LX8 – DECK SECTION – PB A/B S1008 S1004 MS OUT A CrO B CrO CN301 R CH RV311 28 27 PLAYBACK IC611 A 120/70 B NORM/CROM/ LEVEL PB-A/B METAL DECK A A IN PB OUT B IN TC PB L...
HCD-LX7/LX8 – MAIN (2/2) SECTION – IC931 Q931 SWITCH +10V +UNREG, 17V PL A+10V MAIN CONTROL ST +10V IC501 (2/2) Q932 SWITCH M901 STK-POWER POWER FAN DET HP.SW H/P IN FAN SWITCH HP MUTE Q961, 963 IC932 POWER SECTION STK POWER...
HCD-LX7/LX8 – DISPLAY SECTION – DISPLAY CONTROL IC601 REMOTE CONTROL SIRCS RECIEVE IC702 S701 SERIAL PARALLEL JOG A . AMS > CONVERTER JOG B IC701 D604 – D607, D611, D612, D616 – D621, D623 – D627, D635 – D638 LED SCK •...
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HCD-LX7/LX8 WAVEFORMS THIS NOTE IS COMMON FOR PRINTED WIRING – BD (CD) SECTION – – MAIN (2/3) SECTION – BOARDS AND SCHEMATIC DIAGRAMS. (In addition to this, the necessary note is printed in each block.) 3.1Vp-p 2.8Vp-p For schematic diagrams.
HCD-LX7/LX8 6-7. SCHEMATIC DIAGRAM – MAIN (2/3) SECTION – • See page 25 for Waveforms. • See page 28 for Printed Wiring Board. • See page 50 for IC Pin Functions. FUNCTION...
HCD-LX7/LX8 6-13. SCHEMATIC DIAGRAM – PANEL FL SECTION – • See page 25 for Waveforms. • See page 50 for IC Block Diagrams. • See page 52 for IC Pin Functions. FUNCTION...
HCD-LX7/LX8 6-29. IC BLOCK DIAGRAMS 6-30. IC PIN FUNCTIONS • MAIN BOARD IC501 MAIN CONTROL (M306622 MA-A26FP) • MAIN (1/3) section • PANEL FL section Pin No. Pin Name Function IC181 MC14052BF IC603 BA3830F POWER Power amp ON/OFF signal output...
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Pin No. Pin Name Function STEREO Stereo detection for tuner TUNED Tuned detection for tuner ST-CE Tuner chip enable output ST-DOUT Tuner data output ST-DIN Tuner data input ST-CLK Tuner clock output SENS BD Condition signal input HOLD MODE signal output CD latch signal output XRST CD reset signal output...
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• PANEL FL BOARD IC601 DISPLAY CONTROL (TMP88CS76F-1A25) Pin Name Function Pin No. SIRCS Remote commander signal input JOG A Rotary encoder (S701) pulse input LED SCK LED clock signal output LED LATCH LED latch signal output LED DAT LED serial data output LED POWER –...
SECTION 7 EXPLODED VIEWS NOTE: • Items marked “*” are not stocked since they are • Abbreviation The components identified by seldom required for routine service. Some delay : Singapore model mark 0 or dotted line with mark should be anticipated when ordering these items. : Mexican model 0 are critical for safety.
7-4. CHASSIS SECTION The components identified by mark 0 or dotted line with mark not supplied 0 are critical for safety. Replace only with part number specified. not supplied T951 (LX7:UK) not supplied (LX7/LX8:EA,SP,MY) not supplied (LX8:EA,SP,MY) CDM37M-5BD32L (LX8:E,MX) (LX8:E) (LX8:AR) not supplied not supplied...
7-8. BASE UNIT SECTION (BU-5BD32L) M101 M102 The components identified by mark 0 or dotted line with mark 0 are critical for safety. Replace only with part number specified. Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 0 601 8-820-020-02 OPTICAL PICK-UP KSS-213D/Q-NP...
SECTION 8 AUDIO ELECTRICAL PARTS LIST Note: • SEMICONDUCTORS • Due to standardization, replacements in the parts list The components identified by In each case, u: µ , for example: may be different from the parts specified in the mark 0 or dotted line with mark uA...: µ...