Troubleshooting - Sony KV-13FM12 Training Manual

Troubleshooting

The following table is a list of symptoms that occur when any of the supply voltages are shorted to ground at turn ON. This may be helpful in
troubleshooting. It is important that you take into account all the symptoms to aid in your troubleshooting,
Voltage Relay Clicks
+135 2 power On and
Shutdown. Power
supply chirps.
+12 2 power On and
Shutdown. Power
supply chirps.
4 clicks. Power ON,
+5
Degauss ON and OFF
and Shutdown.
4 clicks. Power ON,
+9
Degauss ON and OFF
and Shutdown.
3 Normal
Audio B+
+200 2 power On and
Shutdown. Power
supply chirps.
+12 Scan 4 Normal 3 then fourth
Derived for shutdown.
4 Normal 3 then fourth
-15
for shutdown.
Video Audio
No No
No No
No No
No No
Yes No
No No
No Yes
No Yes
21
Timer HV
LED
4 No
4 No
4 No
4 the No
fourth
flash
stays on
for
several
seconds.
Normal Yes
4 No
4 Yes
4 Yes
Power Switch Suspect
Set ON and Q502, 200 volt
symptom repeats problem, T503 FBT
Set ON and IC603 9 Volt
symptom repeats Regulator, IC501
Pin and OCP
Set ON and IC604 5 Volt
symptom repeats Regulator, Data
problem
Set ON and IC603 9 Volt
symptom repeats Regulator, IC1301
YCJ or IC301
Depending on model
Set turns OFF PS401, 402 and
IC401, 402
depending on model
Set ON and Q502, 200 volt
symptom repeats problem, T503 FBT
Set ON and IC502 V Out, R550
symptom repeats
Set ON and IC502 V Out, R549
symptom repeats