VC-A598U/H995U/H996U
-H997U/H9977U/H998U
1
SERVICE MANUAL
This document has been published to be used for
after sales service only.
The contents are subject to change without notice.
SHARP CORPORATION
VIDEO CASSETTE RECORDER
MODELS
In the interests of user-safety (Required by safety regulations in some
countries) the set should be restored to its original condition and only parts
identical to those specified be used.
VC-A598U/H995U/
H996U/H997U/
H9977U/H998U
CONTENTS
VC-A598U/H995U/H996U/H998U ..... Models for U.S.A.
VC-H997U/H9977U/H998U ............... Models for CANADA
(VC-A598U/H995U/H996U/H997U)
(VC-H9977U/H998U)
S39D6VC-A598U
Page
1. GENERAL INFORMATION .............................. 5
1-1 FEATURES ................................................. 5
1-2 SPECIFICATIONS ..................................... 5
1-3 LOCATION OF MAJOR COMPONENTS
AND CONTROL ......................................... 6
2. DISASSEMBLY AND REASSEMBLY .............. 7
2-1 DISASSEMBLY OF MAJOR BLOCKS ....... 7
2-2 DISASSEMBLING THE MECHANISM/
MAIN PWB ASSEMBLY ............................. 8
2-3 CARES WHEN REASSEMBLING .............. 9
3. FUNCTION OF MAJOR MECHANICAL
PARTS ............................................................ 10
4. ADJUSTMENT, REPLACEMENT AND
ASSEMBLY OF MECHANICAL UNITS .......... 12
4-1 MECHANISM CONFIRMATION
ADJUSTMENT JIG .................................. 12
5. ELECTRICAL ADJUSTMENT ........................ 31
5-1 ADJUSTMENT OF HEAD SWITCHING
POINT ....................................................... 32
Page
5-2 ADJUSTMENT OF FV (False Vertical Sync)
OF STILL PICTURE ................................. 32
5-3 CHECKING OF OFF TRACK ................... 32
5-4 ADJUSTMENT OF SIF-INPUT LEVEL .... 33
5-5 ADJUSTMENT OF STEREO
SEPARATION ........................................... 33
INITIAL JUMPER STTING METHOD ............. 33
6. MECHANISM OPERATION FLOWCHART
AND TROUBLESHOOTING GUIDE .............. 34
7. TROUBLESHOOTING ................................... 40
8. BLOCK DIAGRAM ..........................................51
9. SCHEMATIC DIAGRAM AND PWB FOIL
PATTERN ....................................................... 59
10.PARTS LIST .................................................... 75
11.EXPLODED VIEW OF MECHANICAL
PARTS ............................................................ 84
12.PACKING OF THE SET ................................. 89
Summary of Contents for VC-A598U
Page 6: ...VC A598U H995U H996U H997U H9977U H998U 6 1 3 LOCATION OF MAJOR COMPONENTS AND CONTROL ...
Page 51: ...VC A598U H995U H996U H997U H9977U H998U 51 8 BLOCK DIAGRAM POWER CIRCUIT BLOCK DIAGRAM ...
Page 52: ...VC A598U H995U H996U H997U H9977U H998U 52 SYSTEM SERVO BLOCK DIAGRAM ...
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Page 54: ...VC A598U H995U H996U H997U H9977U H998U 54 SIGNAL FLOW BLOCK DIAGRAM VC A598U ...
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