Viss - Daewoo TVZ 1321 Service Manual

1. Power supply unit
A.
TV will not turn ON
Is there AC power Input
Are diodes ok?
D802, D803, D804, D805
Is there voltage at the +termi-
nal of C806?
Are D811, D812, D813, D814
Are I804, I805,I806
Is the Voltage at pin 40
of I701 "L" ?
Check P803 pin 2 125V
Is waveform of base
of Q301 normal?
Is feedback Voltage of
T801 TRANS normal ?
Above Circuits ok
Yes
No
Yes
No
Yes
No
Yes
No
ok?
Yes
No
ok?
Yes
No
Yes
No
Yes
No
Yes
No
Yes
Check F801 & Power cord
Check L801, D802, D803,
D804, D805
Check R803, C806
Check D811, D812, D813,
D814
Check each Regulator IC
I804, I805, I806
Check I701
Check D814 and trans
Check I701 1, 2
Check I801 STRS-5707
93
Check the
secondary
circuit