GV-A500 - Sony VCR Service Manual (repair manual). Page 3

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1.

Self-diagnosis Function ················································ 5

2.

Self-diagnosis display ··················································· 5

3.

Service Mode Display ·················································· 5

3-1.

Display Method ···························································· 5

3-2.

Switching of Backup No. ············································· 5

3-3.

End of Display ······························································ 5

4.

Self-diagnosis Code Table ············································ 6

Before you begin

Using this manual ······························································· 1-1
Checking supplied accessories ··········································· 1-1

Basic operations

Installing the AC power adaptor ········································· 1-1
Inserting a cassette ······························································ 1-1
Playing back a tape ····························································· 1-2

Advanced operations

Watching on a TV screen ···················································· 1-3
Editing onto another tape ···················································· 1-4
Recording from a VCR or TV ············································ 1-4
Changing the mode settings ················································ 1-5
Using alternative power sources ········································· 1-6

Additional information

Charging the vanadiumlithium battery in the VCR ············ 1-7
Usable cassettes and playback modes ································· 1-7
Notes on “InfoLITHIUM” battery pack ····························· 1-7
Maintenance information and precautions ·························· 1-8
Using your VCR abroad ····················································· 1-9

Trouble check ········································································· 1-9
Self-diagnosis display ····························································· 1-10
Identifying the parts ································································ 1-10
Warning indicators ·································································· 1-11

2-1.

CASSETTE LID ASSEMBLY ····································· 2-1

2-2.

LCD CABINET ···························································· 2-1

2-3.

CRYSTAL INDICATION MODULE,
FLUORESCENT COLD CATHODE TUBE,
PD-88 BOARD ····························································· 2-2

2-4.

CABINET (BOTTOM) ASSEMBLY ··························· 2-3

2-5.

MD BLOCK ASSEMBLY ··········································· 2-3

2-6.

CONTROL (FK-71) SWITCH BLOCK,
DD-100 BOARD ·························································· 2-3

2-7.

VC-197 BOARD ·························································· 2-4

2-8.

B MECHANISM DECK ·············································· 2-4

2-9.

CABINET (R) BLOCK ASSEMBLY,
FP-571 BOARD ··························································· 2-4

2-10. EX-34 BOARD ···························································· 2-4
2-11. IO-62, IR-29, FP-572, FP-573, FP-574,

FP-575 BOARDS SPEAKER ······································ 2-5

2-12. CABINET (UPPER) ASSEMBLY ······························· 2-5
2-13. CIRCUIT BOARDS LOCATION ································ 2-6

3-1.

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

3-2.

VIDEO BLOCK DIAGRAM 1 ···································· 3-4

3-3.

VIDEO BLOCK DIAGRAM 2 ···································· 3-7

3-4.

SERVO BLOCK DIAGRAM ······································· 3-10

3-5.

SYSTEM CONTROL BLOCK DIAGRAM ················ 3-13

3-6.

AUDIO BLOCK DIAGRAM ······································· 3-15

3-7.

MODE CONTROL BLOCK DIAGRAM ···················· 3-17

3-8.

LCD BLOCK DIAGRAM ··········································· 3-20

3-9.

POWER SUPPLY BLOCK DIAGRAM ······················ 3-23

4-1.

FRAME SCHEMATIC DIAGRAM ····························· 4-1

4-2.

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

• VC-197 (MAIN) PRINTED WIRING BOARD ······· 4-5
• VC-197 (REC/PB HEAD AMP)

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

• VC-197 (EVR) SCHEMATIC DIAGRAM ··············· 4-16
• VC-197 (VIDEO PROCESS)

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

• VC-197 (Y/C PROCESS)

SCHEMATIC DIAGRAM ··························· 4-23

• VC-197 (TBC/CNR) SCHEMATIC DIAGRAM ······ 4-27
• VC-197 (VIDEO IN/OUT)

SCHEMATIC DIAGRAM ··························· 4-30

• VC-197 (RGB DECODER)

SCHEMATIC DIAGRAM ··························· 4-33

• VC-197 (IR DRIVER), IR-29 (TRANSMITTER)

SCHEMATIC DIAGRAM ··························· 4-37

• IR-29 (TRANSMITTER)

PRINTED WIRING BOARD ······················ 4-40

• VC-197 (SERVO/SYSTEM CONTROL)

SCHEMATIC DIAGRAM ··························· 4-41

• VC-197 (SERVO) SCHEMATIC DIAGRAM ·········· 4-44
• VC-197 (MODE CONTROL)

SCHEMATIC DIAGRAM ··························· 4-47

• VC-197 (AUDIO) SCHEMATIC DIAGRAM ·········· 4-51
• IO-62 (AV IN/OUT) SCHEMATIC DIAGRAM ······ 4-55
• EX-34 (MULTI CONNECTOR)

SCHEMATIC DIAGRAM ··························· 4-59

• EX-34 (MULTI CONNECTOR)

PRINTED WIRING BOARD ······················ 4-63

• IO-62 (AV IN/OUT) PRINTED WIRING BOARD · 4-65
• PD-88 (LCD DRIVER)

SCHEMATIC DIAGRAM ··························· 4-68

• PD-88 (LCD DRIVER)

PRINTED WIRING BOARD ······················ 4-71

• DD-100 (POWER SUPPLY)

PRINTED WIRING BOARD ······················ 4-73

• DD-100 (POWER SUPPLY)

SCHEMATIC DIAGRAM ··························· 4-75

5-1.

PREPARATIONS ························································· 5-1

1-1.

PREPARATIONS BEFORE ADJUSTMENT ·············· 5-1

1-1-1. List of Service Tools ····················································· 5-1
1-1-2. Adjusting Remote Commander ···································· 5-2
1.

Using the adjusting remote commander ······················· 5-2

2.

Precautions upon using the adjusting
remote commander ······················································· 5-2

1-1-3. Page D Address ···························································· 5-3
1-1-4. Page F Address ····························································· 5-4
1-1-5. Page E Address ····························································· 5-7
1-2.

INITIALIZATION OF D, E, F PAGE DATA ··············· 5-8

1.

Initialization of D, E, F Page Data ······························· 5-8

2.

Modification of D Page Data ········································ 5-8

3.

Modification of F Page Data ········································ 5-9

4.

Modification of E Page Data ········································ 5-10

1-3.

Data Processing ···························································· 5-10

5-2.

MECHANICAL SECTION ADJUSTMENT ·············· 5-11

2-1.

OPERATING WITHOUT A CASSETTE ···················· 5-11

2-2.

TAPE PATH ADJUSTMENT ······································· 5-11

1.

Preparations for adjustments ········································ 5-11