Sharp VC-A400U Service Manual

1. GENERAL INFORMATION............................................................................................................ 4
1-1 FEATURES ............................................................................................................................. 4
1-2 SPECIFICATIONS .................................................................................................................. 4
1-3 LOCATION OF MAJOR COMPONENTS AND CONTROL .....................................................5
2. DISASSEMBLY AND REASSEMBLY ............................................................................................ 6
2-1 DISASSEMBLY OF MAJOR BLOCKS .................................................................................... 6
2-2 DISASSEMBLING THE MECHANISM/MAIN PWB ASSEMBLY ............................................ 7
2-3 CARES WHEN REASSEMBLING ........................................................................................... 8
3. FUNCTION OF MAJOR MECHANICAL PARTS ........................................................................... 9
4. ADJUSTMENT, REPLACEMENT AND ASSEMBLY OF MECHANICAL UNITS ........................ 11
4-1 MECHANISM CONFIRMATION ADJUSTMENT JIG ............................................................ 11
5. ELECTRICAL ADJUSTMENT ...................................................................................................... 30
5-1 ADJUSTMENT OF HEAD SWITCHING POINT .................................................................... 31
5-2 ADJUSTMENT OF FV (False Vertical Sync) OF STILL PICTURE ...................................... 31
5-3 CHECKING OF OFF TRACK ................................................................................................ 31
5-4 ADJUSTMENT OF SIF-INPUT LEVEL ................................................................................. 32
5-5 ADJUSTMENT OF STEREO SEPARATION ........................................................................ 32
6. MECHANISM OPERATION FLOWCHART AND TROUBLESHOOTING GUIDE ...................... 33
7. TROUBLESHOOTING ................................................................................................................. 39
8. BLOCK DIAGRAM ....................................................................................................................... 50
9. SCHEMATIC DIAGRAM AND PWB FOIL PATTERN .................................................................. 58
10. REPLACEMENT PARTS LIST .................................................................................................... 73
11. EXPLODED VIEW OF MECHANICAL PARTS ............................................................................ 81
12. PACKING OF THE SET .............................................................................................................. 85
SHARP CORPORATION
SERVICE MANUAL
MODELS
In the interests of user-safety (Required by safety regula-
tions in some countries) the set should be restored to its
original condition and only parts identical to those specified
be used.
CONTENTS
This document has been published to be used for
after sales service only.
The contents are subject to change without notice.
1
VIDEO CASSETTE RECORDER
VC-A400U
VC-H800U
VC-A400U VC-A400U
VC-H800U VC-H800U
S39E7VC-A400U
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