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US Model SLV-677HF/678HF/688HF Canadian Model SLV-478/677HF/678HF Mexican Model SLV-L47/L57/L67HF/L77HF/X50/X60HF Panamanian Model SLV-L47/L58/L67HF/L78HF Venezueran Model Photo : SLV-478 SLV-L48/L58/L68HF/L78HF • Refer to the SERVICE MANUAL of VHS MECHANICAL ADJUSTMENT for MECHANICAL ADJUSTMENTS. (9- S MECHANISM 921-647-11) HiFi model: SLV-677HF/678HF/688HF/L67HF/L68HF/L77HF/L78HF/X60HF Mono model:SLV-478/L47/L48/L57/L58/X50...
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MARK ! ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE REMPLACER CES COMPOSANTS QUE PAR DES PIÈSES SONY COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS DANS LES SUPPÉMENTS PUBLIÉS PAR SONY.
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SAFETY CHECK-OUT After correcting the original service problem, perform the following safety checks before releasing the set to the customer. LEAKAGE TEST Check the area of your repair for unsoldered or poorly-soldered connections. Check the entire board surface for solder splashes and bridges.
SLV-478/677HF/678HF/688HF/L47/L48/L57/ L58/L67HF/L68HF/L77HF/L78HF/X50/X60HF SERVICE NOTE 1. ERROR CODE INDICATION • Error codes are indicated using the lower 5 digits in the fluorescent display tube. “At this time, Colon “:” between character is not indicated.” Mode code indication when the error has occurred.
HOW TO REPLACE A ROTARY UPPER DRUM (HiFi MODEL) See below for note. 2-1. HOW TO REMOVE A ROTARY UPPER DRUM 2-2. HOW TO ATTACH A NEW ROTARY UPPER Remove screw 1 (+P3 × 8) and remove the ground shaft DRUM assembly 2.
SLV-478/677HF/678HF/688HF/L47/L48/L57/ L58/L67HF/L68HF/L77HF/L78HF/X50/X60HF SECTION 1 This section is extracted from SLV-688HF nstruction manual. GENERAL...
SLV-478/677HF/678HF/688HF/L47/L48/L57/ L58/L67HF/L68HF/L77HF/L78HF/X50/X60HF SECTION 2 DISASSEMBLY NOTE : Follow the disassembly procedure in the numerical order given. 2-1. UPPER CASE, FRONT PANEL BLOCK ASSEMBLY 2 Upper case 1 Tapping screws 3 Connector (From CN423 on MA-317 board) (Models built in JK-161 board only)
SLV-478/677HF/678HF/688HF/L47/L48/L57/ L58/L67HF/L68HF/L77HF/L78HF/X50/X60HF 3-5. TUNER BLOCK DIAGRAM MA-317 BOARD (SEE PAGE 4-19) L731 TU701 TUNER/MOD/IF IF702 V OUT SPLITTER TU VIDEO IC201 32 VIDEO BLOCK VHF/ (SEE PAGE 3-3) IC733 RF AGC ST / BILINGUAL PROCESSOR TU AUDIO L IC360 AUDIO...
SLV-478/677HF/678HF/688HF/L47/L48/L57/ L58/L67HF/L68HF/L77HF/L78HF/X50/X60HF There are few cases that the part printed on this diagram isn’t mounted in this model. 4-2. PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS MA-317 (REC/PB AMP, VIDEO, SERVO/SYSTEM CONTROL, AUDIO, MODE CONTROL, TUNER, POWER SUPPLY) PRINTED WIRING BOARD —...
5-3. SYSTEM CONTROL — SYSTEM CONTROL PERIPHERAL CIRCUIT INTERFACE (MA-317 board IC160) Signal Pin No. I/O level MA-317 Board RESET Normally “H”. “L” when service interruption detected or restored. IC160 $£ MA-317 Board Serial communication data to audio microprocessor and I2C DATA1 IC160 @™...
SLV-478/677HF/678HF/688HF/L47/L48/L57/ L58/L67HF/L68HF/L77HF/L78HF/X50/X60HF SECTION 6 ADJUSTMENTS 2-1-3. Input Signal Check 6-1 MECHANICAL ADJUSTMENTS Video signal produced by a pattern generator is used as an adjustment signal to perform electrical alignment for this unit. This video signal For the mechanical adjustments, please refer to the must satisfy the specification.
2-1-5. Input/Output Levels and Impedance 2-2. POWER SUPPLY CHECK Video input: LINE IN 2-2-1. Output Voltage Check (MA-317 Board) Input signal: 1Vp-p, 75ohms, unbalanced, Mode sync negative Measuring Instrument Digital voltmeter Video output: LINE OUT SW 12V Check Output signal: 1Vp-p, 75ohms, unbalanced, IC601 pin 2 sync negative Measurement point...
2-3. SERVO SYSTEM CHECK Unless otherwise specified, set the switches to the following positions. • PROGRAM switch ........LINE or LINE 1 • INPUT SELECT switch ......LINE or LINE 1 (Remote commander) • TAPE SPEED switch ...... SP (Remote commander) 2-3-1.
2-4. VIDEO SYSTEM CHECKS AND ADJUSTMENT 2-4-2. SYNC AGC Check (MA-317 Board) For the video system checks, follow the checking procedures given Mode below as a rule. The color bar video signal supplied from the pattern Signal Color bar generator is used as the video input signal for the video system IC201 pin #•...
2-4-4. Recording Y Level Check (MA-317 Board) 2-4-6. Playback Level Check (MA-317 Board) Mode Mode Playback Signal No-signal Signal Alignment Alignment tape : SP mode color bar portion IC201 pin !• Measurement point Measurement point Video LINE OUT terminal Measuring instrument Oscilloscope Measuring instrument Oscilloscope...
2-5. AUDIO SYSTEM ADJUSTMENT 2-5-3. Overall Output Level and Distortion Factor • For the adjustment of the audio system, perform in the SP mode Check if there is no special notes. Use the alignment tape. Mode Self-record playback Signal 400Hz, –7.5dBs : CJ570 [Connecting Instruments] Measurement point CJ570...
SLV-478/677HF/678HF/688HF/L47/L48/L57/ L58/L67HF/L68HF/L77HF/L78HF/X50/X60HF SECTION 7 REPAIR PARTS LIST 7-1. EXPLODED VIEWS Note: • -XX, -X mean standardized parts, so they may • The mechanical parts with no reference number The components identified by mark ! or have some differences from the original one.
7-1-4. MECHANISM DECK-2 Note: There are two types of drum assembly in the HiFi #701 models for service. [Discrimination] No. 768-770 (Note) —Top View— There are two printed circuit boards on the top. No. 776 #701 —Top View— There is no printed circuit board. #702 Note: It cannot be divided to two parts, the upper and the...
DS-79 JK-161 7-2. ELECTRICAL PARTS LIST Note: • Due to standardization, replacements in the • RESISTORS When indicating parts by reference number, parts list may be different from the parts All resistors are in ohms. please include the board name. specified in the diagrams or the components METAL: metal-film resistor The components identified by mark ! or...