Distinguish The Problem - Panasonic SA-VK81DEE Service Manual

12.1. Distinguish the problem

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.
12.1.1. Troubleshooting Guide Part 1
Checking Points
AC Inlet Circuit 1. Failure to power-up
the main unit.
2. Power On switch
3.
supply to main unit.
Possible Faults Possible Reasons
· Wrong selection of AC
power to main unit.
· AC inlet JK500 is faulty.
· AC Line filter L500 is
faulty.
· Power On switch broken.
· Check for connection.
Intermittent Power
· Replace of fuse if found faulty.
· Replace of AC Inlet if found faulty or damaged.
· Replace AC Line filter is found faulty or damaged.
· Replace Power On button switch if necessary.
· If conditions as mentioned above is in good condition.
Check for wire connection. (W1/W2). If connection is
good, please proceed to check for Transformer Circuit.
· If condition 1 to 4 as mentioned above is in good
condition. Check for wire connection. (W1/W2). If
connection is good, please proceed to check for
Transformer Circuit
17
Countermeasure
SA-VK81DEE