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SLV-L56AR/L76HFAR/L86HFAR RMT-V247E/V247F SERVICE MANUAL Argentina Model Photo: SLV-L86HFAR S MECHANISM • Refer to the SERVICE MANUAL of VHS MECHANICAL ADJUSTMENTS VI for MECHANICAL ADJUSTMENTS. (9-921-647-11) * The abbreviations of L56, L76HF and L86HF contained in this service manual are indicated when these models are common to all their corresponding mod- els as given below.
LINE WITH MARK ! 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.
TABLE OF CONTENTS Section Title Page Section Title Page Feature Difference ..............2 INTERFACE, IC PIN FUNCTION DESCRIPTION SERVICE NOTE ..............4 5-1. System Control-Video Block Interface (MA-323 board IC161) ..........5-1 GENERAL 5-2. System Control-Servo Peripheral Circuit Interface (MA-323 board IC161) ..........5-1 Getting Started ..............
SERVICE NOTE 1. DISASSEMBLY • This set can be disassembled in the order shown below. Note: Pages in indicated pages in the SERVICE MANUAL. Pages in indicated pages in the VHS MECHANICAL ADJUSTMENT MANUAL VI. Upper case (Page 2-1) Front Panel Pinch Press Ground Shaft Rear...
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SLV-L56/L76HF/L86HF SECTION 1 This section is extracted from instruction GENERAL manual (3-866-973-11).
SLV-L56/L76HF/L86HF SECTION 2 DISASSEMBLY Note: Follow the disassembly procedure in the numerical order given. 2-1. UPPER CASE REMOVAL 2-3. POWER BLOCK REMOVAL 3 Upper case 2 Screw 1 Two tapping screws (B3) 4 Power block 2 Two tapping screws 3 Screw (B3) 1 Connector (CN600)
SLV-L56/L76HF/L86HF SECTION 3 BLOCK DIAGRAMS 3-1. OVERALL BLOCK DIAGRAM MA-323 BOARD (SEE PAGE 4-9~4-32) DRUM MOTOR (M901) L56/L76HF IC203 IC161 (1/2) IC161 TU701 JS201 IC201 (1/2) Q400,402 CNJ901 (2/2) CNJ901 VIDEO VIDEO VIDEO TV/VTR, AFT D VS VIDEO LINE-1 IN VIDEO VIDEO UHF/VHF...
SLV-L56/L76HF/L86HF 3-2. VIDEO (1) BLOCK DIAGRAM MA-323 BOARD (1/6) IC501 (SEE PAGE 4-9) VIDEO REC/PB AMP VIDEO HEAD CN502 IC501 @™ PB SP CH1 F SP CH1 S SP CH2 F 800mVp-p(H) SP CH2 S EP CH1 F IC501 @• REC EP CH1 S Q501 EP CH2 F...
SLV-L56/L76HF/L86HF 3-5. AUDIO BLOCK DIAGRAM MA-323 BOARD (4/6) (SEE PAGE 4-9,11, 19, 23) CN301 AUDIO Q309 IC201 REC/PB VIDEO(2) SP/LP HEAD LP.EP NORMAL L76HF/L86HF SEE PAGE SWITCH AUDIO PROCESS CLOCK (IIC) SERVO/SYSTEM PAL-N CONTROL Q300 DATA (IIC) Q303, 311, 312 BAND PAL/NTSC A MUTE...
SLV-L56/L76HF/L86HF SECTION 4 PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS For schematic Diagram: THIS NOTE IS COMMON FOR PRINTED WIRING • Caution when replacing chip parts. BOARDS AND SCHEMATIC DIAGRAMS. New parts must be attached after removal of chip. (In addition to this, the necessary note is printed Be careful not to heat the minus side of tantalum capacitor, in each block.) because it is damaged by the heat.
SLV-L56/L76HF/L86HF 4-2. PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS There are few cases that the part isn't mounted in this model is printed on this diagram. MA-323 (HEAD AMP, VIDEO, AUDIO, IO, SERVO/SYSTEM CONTROL, TUNER) PRINTED WIRING BOARD – Ref. No.: MA-323 board; 1,000 series – HEAD AMP, VIDEO, AUDIO, IO, SERVO/SYSTEM CONTROL, TUNER MA-323...
SLV-L56/L76HF/L86HF MA-323 (VIDEO, AUDIO) SCHEMATIC DIAGRAM • See page 4-5 for printed wiring board. – Ref. No.: MA-323 board; 1,000 series – Note: The components identified by mark ! or dotted line with mark ! are critical for safety. Replace only with part number specified. VIDEO, AUDIO MA-323 (2/10) 4-11...
SLV-L56/L76HF/L86HF MA-323 (SERVO CONTROL) SCHEMATIC DIAGRAM • See page 4-5 for printed wiring board. – Ref. No.: MA-323 board; 1,000 series – Note: The components identified by mark ! or dotted line with mark ! are critical for safety. Replace only with part number specified. SERVO CONTROL MA-323 (4/10) 4-19...
SLV-L56/L76HF/L86HF MA-323 (FL DRIVER) SCHEMATIC DIAGRAM • See page 4-5 for printed wiring board. – Ref. No.: MA-323 board; 1,000 series – FL DRIVER MA-323 (9/10) 4-29 4-30...
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SLV-L56/L76HF/L86HF MA-323 (POWER SUPPLY) SCHEMATIC DIAGRAM • See page 4-5 for printed wiring board. – Ref. No.: MA-323 board; 1,000 series – Note: The components identified by mark ! or dotted line with mark ! are critical for safety. Replace only with part number specified. POWER SUPPLY MA-323 (10/10) 4-31...
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SLV-L56/L76HF/L86HF DM-76 (MODE CONTROL), MF-312 (MODE CONTROL, FRONT IN) PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS – Ref. No.: DM-76 board, MF-312 board; 2,000 series – There are few cases that the part isn't mounted in this model is printed on this diagram. MF-312 BOARD CN407 CN408...
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SLV-L56/L76HF/L86HF HS-921SF1 (POWER SURRLY) PRINTED WIRING BOARD There are few cases that the part isn't mounted in this model is printed on this diagram. – Ref. No.: HS-921SF1 board; 3,000 series – – SLV-L56 – MA-323 VIDEO, AUDIO, I/O, HS-921SF1 BOARD SERVO/SYSTEM CONTROL, TUNER CN101 CN201...
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SLV-L56/L76HF/L86HF SR-708 (POWER SUPPLY) PRINTED WIRING BOARD – Ref. No.: SR-708 board; 4,000 series – There are few cases that the part isn't mounted in this model is printed on this diagram. – SLV-L76HF/L86HF – MA-323 VIDEO, AUDIO, I/O, SR-708 BOARD SERVO/SYSTEM CONTROL, TUNER CN101 CN201...
SLV-L56/L76HF/L86HF SECTION 6 ERROR CODE This set displays an error code, and a mode code in case of error Table 6-2. Mode Codes in Case of Error on the display tube, if the operation stopped by error. Code Description The following provides description concerned. EJECT (POWER ON) Display tube (lower 5 digits) EJECT (POWER OFF)
SLV-L56/L76HF/L86HF SECTION 7 ADJUSTMENTS 2-1-3. Set-up of Adjustment During the adjustment, see the Parts Arrangement In this adjustment, PAL-N or NTSC pattern generator is connected Diagram for Adjustments on Page 7-6. with LINE input signal terminal. When check to tuner, connected AERIAL terminal.
2-1-6. Adjusting Sequence 2-3. SERVO SYSTEM ADJUSTMENT Make the electrical adjustment in the following sequence. 2-3-1. RF Switching Position Adjustment Checking power supply (MA-323 Board) Purpose: Adjust the interval between A ch and B ch of tape playback out- put. Servo system adjustment Improve the interchangeability with other tapes and sets.
2-4. AUDIO SYSTEM ADJUSTMENTS RF SWP • Adjust both Lch and Rch. [Connection] Audio Audiolevel meter or generator distortion meter 600 Ω 47 kΩ Attenuator AUDIO LINE IN Feed signal both AUDIO LINE OUT channelssimultaneously. Fig. 7-2-5. Fig. 7-2-4. 2. Frequency Responce Check 2-4-1.
3. Overall Level Characteristic and Distortion Factor 2-4-2. Normal Audio System Adjustment Check • Make adjustment in the SP mode, unless otherwise specified. Purpose: Use a normal VHS cassette for an adjustment tape. Check the record level, play level, and distortion factor against •...
4. Overall Level Characteristic and Distortion Factor 2-5. TUNER SYSTEM ADJUSTMENT 2-6. PARTS ARRANGEMENT DIAGRAM FOR ADJUSTMENTS Check Purpose: [Connection] MA-323 BOARD (Side A) Check the record level, play level, and distortion factor against the reference input. CN501 Audio level meter Mode REC and PB (SP mode)
8-1-2. CHASSIS ASSEMBLY supplied supplied supplied supplied supplied The components identified by mark ! or dotted line with mark ! are criti- cal for safety. Replace only with part number speci- fied. Ref. No. Part No. Description Remark Ref. No. Part No.
DM-76 MA-323 8-2. ELECTRICAL PARTS LIST NOTE: The components identified by • Due to standardization, replacements in the • Items marked “*” are not stocked since they mark ! or dotted line with mark parts list may be different from the parts speci- are seldom required for routine service.