Power Circuit - NAD T 562 Service Manual

POWER CIRCUIT

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