SA-VK61DGS
SA-VK61DGS
SA-VK61DGS
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<strong>SA</strong>-<strong>VK61DGS</strong><br />
13.1. Distinguish the trouble cause<br />
How to distinguish the trouble<br />
1. View mechanical part if visual damage occurred.<br />
Confirm the movement of mechanical parts assembly<br />
(tray ass’y, loading mechanism ass’y, etc.).<br />
2. Diagnose if Optical Pickup Unit is faulty (refer to<br />
diagnosis of Optical Pickup Unit).<br />
3. If mechanism and OPU are OK, it is P.C.B.<br />
Cause 1<br />
Possible fault<br />
1. AC Inlet Circuit/Voltage Selector Circuit Fuse Blow (F1,F2), Power Transformer Problem(T501,<br />
T502), Wrong Selection of Selector (S501)<br />
2. Power Circuit Fuse Blow (F3, F4) FP951, FP950 open<br />
3. Power Amp Circuit IC502 faulty<br />
4. Power Supply Circuit IC500, IC501 faulty<br />
5. Panel Circuit FL Display Problem (-VP → Q950 faulty/ FP951 open/ D961<br />
faulty)<br />
SVS6V to Micro-P (Q951/ D965 faulty) Problem<br />
Cause 2<br />
Possible fault<br />
1. Mechanical block Tray and loading mechanical block, traverse unit, deck unit<br />
2. O.P.U. Refer to the diagnosis of OPU<br />
3. Circuit IC307 faulty (check for pin 31, 32)<br />
IC701 faulty (check for pin 2, 23)<br />
4. Power circuit Refer to Cause 1<br />
Cause 3<br />
Possible fault<br />
1. Mechanical block Traverse block (Tilt adjustment)<br />
2. O.P.U. Refer to the diagnosis of OPU<br />
18
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