Daewoo DT-4220NH Service Manual page 53

TROUBLE DIAGNOSIS
AC PWR "OFF"
Do DIODE TEST
On High Voltage, Scan Relay Board
NO
Tests Passed?
YES
Replace failed PCB
Replace Scan Relay Board
AC PWR "ON" =>
PWR "ON" with Remote Controller
"SHUT DOWN"
YES NO
accur?
R e p l a c e P >i g h
Diagnosis Complete
V o l t a g e P &o a r d
Fig. 7 Trouble Diagnosis Flow when HIGH VOLTAGE "SHUT DOWN" occurs
-52-