2-14
Are D409 T403
Q405 normal?
Check R420,C441,
U401.
2.
POWER CIRCUIT
Input voltage 230V (C.Ver.)
No
A primary side abnormal
Is F402 normally?
Is voltage T403,D401 230V?
Are D401, D409 normal?
Are U401,V401 normal?
START
No
Yes
Yes
Yes
Yes
END
No
No
Replace defective parts
Is voltage J410
pin1 5V?
No
Yes
Is VD402 normal?
Yes
Yes
Is T404 normal?
No
No
No
Is L403 normal?
Replace defective parts
Is J406 pin5 5V?
No
Is D410 normal?
Replace defective parts
Is J409 pin1 9V?
No
Are D409, R413, D406,
R414
normal?
Replace defective parts
Are J414 pin1, 4
+/-12V?
No
Are Q410, 409, 426 normal?
Replace defective parts
No
Are D403, R402 normal?
Replace defective parts
Is J406 pin3 -20V?
No
Yes
No
No
Are Q406, Q407 normal?
Replace defective parts
Yes
Yes
Yes
No
No
No
Are D402, R403, R404,
R405 normal?
Replace defective parts
Is voltage between
J406
pin1,2 3.5V?
No
Yes
Yes
END
Is U401 pin6
switch normally?
Are J411 pin1, 2
3.3V?
No