13.1. Distinguish the trouble cause
How to distinguish the trouble
1. View mechanical part if visual damage occurred.
Confirm the movement of mechanical parts assembly
(tray ass’y, loading mechanism ass’y, etc.).
2. Diagnose if Optical Pickup Unit is faulty (refer to
diagnosis of Optical Pickup Unit).
3. If mechanism and OPU are OK, it is P.C.B.
Cause 1
Possible fault
1. AC Inlet Circuit/Voltage Selector Circuit
Fuse Blow (F1,F2), Power Transformer Problem(T501,
T502), Wrong Selection of Selector (S501)
2. Power Circuit
Fuse Blow (F3, F4) FP951, FP950 open
3. Power Amp Circuit
IC502 faulty
4. Power Supply Circuit
IC500, IC501 faulty
5. Panel Circuit
FL Display Problem (-VP
→
Q950 faulty/ FP951 open/ D961
faulty)
SVS6V to Micro-P (Q951/ D965 faulty) Problem
Cause 2
Possible fault
1. Mechanical block
Tray and loading mechanical block, traverse unit, deck unit
2. O.P.U.
Refer to the diagnosis of OPU
3. Circuit
IC307 faulty (check for pin 31, 32)
IC701 faulty (check for pin 2, 23)
4. Power circuit
Refer to Cause 1
Cause 3
Possible fault
1. Mechanical block
Traverse block (Tilt adjustment)
2. O.P.U.
Refer to the diagnosis of OPU
18
SA-VK61DGS
Summary of Contents for SB-VK61
Page 10: ...10 Operation Procedures 10 SA VK61DGS ...
Page 11: ...11 SA VK61DGS ...
Page 12: ...11 Disc information 12 SA VK61DGS ...
Page 13: ...13 SA VK61DGS ...
Page 17: ...13 Procedure for repairing the set 17 SA VK61DGS ...
Page 57: ...18 3 1 Cassette Deck Section 18 3 2 Adjustment Point 18 3 Alignment Points 57 SA VK61DGS ...
Page 131: ...25 1 Deck Mechanism RAA3412 S 25 1 1 Deck Mechanism Parts Location 131 SA VK61DGS ...
Page 132: ...132 SA VK61DGS ...
Page 135: ...135 SA VK61DGS ...
Page 136: ...136 SA VK61DGS ...
Page 138: ...25 3 Cabinet 25 3 1 Cabinet Parts Location 138 SA VK61DGS ...
Page 139: ...139 SA VK61DGS ...
Page 140: ...140 SA VK61DGS ...
Page 155: ...25 6 Packaging 155 SA VK61DGS PRT0406 D K J N L ...
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