Power Supply Unit - Daewoo DVN-14F6N Service Manual

1. Power supply unit

A.
TV is not turned ON
Is AC power Supply Input
Are diodes operated?
D802, D803, D804, D805
Is Voltage output from both
terminals of C806 ?
Are D811, D812, D813, D814
operated?
Are I804, I805,I806
operated ?
Is Voltage of pin 40
of I701 "L" ?
Check P803 pin 2 125V
Is waveform of base
of Q301 normal?
Is feedback Voltage of
T801 TRANS normal ?
Be all right
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
Check F801 & Power code
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
84
Check the
secondary
circuit