SLV-AX10, SLV-AX20, SLV-LX4, SLV-LX5, SLV-LX6S, SLV-LX7S, SLV-LX8S, SLV-N50, SLV-N60, SLV-N70, SLV-N80 - Sony VCR Service Manual (repair manual). Page 3

— 3 —

1.

ERROR CODE INDICATION ··········································· 5

Getting Started ··········································································· 1-1

Step 1 : Unpacking ································································ 1-1
Step 2 : Setting up the remote commander ···························· 1-1
Step 3 : Hookups ···································································· 1-2
Selecting a language ······························································ 1-7
Setting the clock ···································································· 1-7
Setting up the cable box control ············································ 1-9
Presetting channels ······························································ 1-11
Setting up the VCR Plus+ GOLD system ···························· 1-12
Setting up the VCR Plus+ system ········································ 1-14

Basic Operations ······································································ 1-15

Playing a tape ······································································· 1-15
Recording TV programs ······················································ 1-16
Recording TV programs using the Dial Timer ···················· 1-17
Recording TV programs using the VCR Plus+ or
VCR Plus+ GOLD system ··················································· 1-18
Setting the timer manually ··················································· 1-19

Additional Operations ····························································· 1-19

Playing/searching at various speeds ···································· 1-19
Setting the recording duration time ····································· 1-20
Checking/changing/canceling timer settings ······················· 1-20
Recording stereo and bilingual programs ···························· 1-21
Searching using the Tape Guide function ···························· 1-21
Searching using the index function ······································ 1-22
Searching for a selected point on the tape ··························· 1-22
Locating a channel by Station ID ········································ 1-23
Creating a favorite channel list with Station ID ·················· 1-23
Adjusting the picture ··························································· 1-23
Changing menu options ······················································· 1-24
Editing with another VCR ··················································· 1-24

Additional Information ···························································· 1-25

General setup information ··················································· 1-25
Troubleshooting ··································································· 1-25
Index to parts and controls ··················································· 1-26

2-1.

CASE, FRONT PANEL BLOCK ASSEMBLY ·············· 2-1

2-2.

DM-89 BOARD, DI-74 BOARD, JK-178 BOARD,
MF-319 BOARD ····························································· 2-1

2-3.

REAR PANEL ································································· 2-2

2-4.

MA-370 BOARD ···························································· 2-2

2-5.

MECHANISM DECK ····················································· 2-3

2-6.

INTERNAL VIEWS ························································ 2-4

2-7.

CIRCUIT BOARDS LOCATION ··································· 2-5

3-1.

OVERALL BLOCK DIAGRAM ···································· 3-1

3-2.

VIDEO BLOCK DIAGRAM ·········································· 3-3

3-3.

SERVO/SYSTEM CONTROL BLOCK DIAGRAM ····· 3-5

3-4.

TUNER BLOCK DIAGRAM ········································· 3-7

3-5.

AUDIO BLOCK DIAGRAM ·········································· 3-9

3-6.

POWER BLOCK DIAGRAM ······································· 3-11

4-1.

FRAME SCHEMATIC DIAGRAM ································ 4-3

4-2.

PRINTED WIRING BOARDS AND SCHEMATIC
DIAGRAMS ···································································· 4-5

• MA-370 (VIDEO, AUDIO, SERVO/SYSTEM

CONTROL, TUNER, POWER)

PRINTED WIRING BOARD ························· 4-5

• MA-370 (1/8)(REC/PB HEAD AMP)

SCHEMATIC DIAGRAM ······························ 4-7

• MA-370 (2/8)(Y/C, AUDIO PROCESS)

SCHEMATIC DIAGRAM ······························ 4-9

• MA-370 (3/8)(SERVO/SYSTEM CONTROL)

SCHEMATIC DIAGRAM ···························· 4-11

• MA-370 (4/8)(AUDIO PROCESS)

SCHEMATIC DIAGRAM ···························· 4-13

• MA-370 (5/8)(TUNER)

SCHEMATIC DIAGRAM ···························· 4-15

• MA-370 (6/8)(DISPLAY CONTROL)

SCHEMATIC DIAGRAM ···························· 4-17

• MA-370 (7/8)(POWER SUPPLY)

SCHEMATIC DIAGRAM ···························· 4-19

• MA-370 (8/8)(VSET)

SCHEMATIC DIAGRAM ···························· 4-21

• JK-178 (LINE-2 IN)

PRINTED WIRING BOARD AND
SCHEMATIC DIAGRAM
(AX10/AX20/N50/N60/LX4/LX5/
 LX6S/LX7S) ················································ 4-29

• JK-191 (LINE-2 IN)

PRINTED WIRING BOARD AND
SCHEMATIC DIAGRAM
(N70/N80/LX8S only) ·································· 4-31

• DM-89 (FUNCTION)

PRINTED WIRING BOARD AND
SCHEMATIC DIAGRAM
(N70/N80/LX8S only) ·································· 4-33

• MF-319 (SIRCS)

PRINTED WIRING BOARD AND
SCHEMATIC DIAGRAM
(N70/N80/LX8S only) ·································· 4-35

• DI-74 (DIAL TIMER)

PRINTED WIRING BOARD AND
SCHEMATIC DIAGRAM
(EXCEPT: AX10/N50) ································· 4-36

5-1.

SYSTEM CONTROL — MECHANISM BLOCK
INTERFACE (MA-370 BOARD IC160) ························ 5-1

5-2.

SYSTEM CONTROL — SERVO PERIPHERAL
CIRCUIT INTERFACE (MA-370 BOARD IC160) ······· 5-1

5-3.

SYSTEM CONTROL — SYSTEM CONTROL
PERIPHERAL CIRCUIT INTERFACE
(MA-370 BOARD IC160) ··············································· 5-2

5-4.

SYSTEM CONTROL AND RF MODULATOR
— INPUT SELECTION BLOCK INTERFACE
(MA-370 BOARD IC160) ··············································· 5-2

5-5.

SYSTEM CONTROL — VIDEO/RP BLOCK
INTERFACE (MA-370 BOARD IC160) ························ 5-2

5-6.

SYSTEM CONTROL — AUDIO BLOCK INTERFACE
(MA-370 BOARD IC160) ··············································· 5-2

5-7.

SERVO/SYSTEM CONTROL MICROPROCESSOR
PIN FUNCTIONS (MA-370 BOARD IC160) ················ 5-3

6-1

MECHANICAL ADJUSTMENTS ································· 6-1

6-2.

ELECTRICAL ADJUSTMENTS ··································· 6-1

2-1.

PREPARATION BEFORE ADJUSTMENT ··················· 6-1

2-1-1. Equipment Required ························································ 6-1
2-1-2. Equipment Connection ···················································· 6-1
2-1-3. Set-up of Adjustment ······················································· 6-1
2-1-4. Alignment Tape ······························································· 6-1
2-1-5. Input/Output Levels and Impedance ······························· 6-2
2-1-6. Adjustment Sequence ······················································ 6-2
2-2.

POWER SUPPLY CHECK ············································· 6-2

2-2-1. Output Voltage Check (MA-370 Board) ························· 6-2