VIORE PDP4210EA Service Manual page 96

4. Trouble shooting.
3. PSU(Power Supply Unit)
1. Check each unit part of PSU inside with naked eyes.
(capacitor, FET, a kind of IC, resistor)
2. Check FUSE and SW1 (on Normal).
3. Check Output voltage which is converted from AC V
to DC V.
voltage Check (5V, Va, Vs)
※ When PSU Protection occurred. Check Short
between Y-SUS, Z-SUS B/D .
Confirm
input voltage
Multi-meter Touch point
(5V, Va ,Vs must accord with Module Label)
Adjust
if not same
voltages
Vs Voltage ADJ
(Vs : About 180 ~195 V)
SW1 Normal
Fuse open check
Va, 5V(VCC) Voltage ADJ
■ Va : About 55 ~65 V
■ 5V(VCC) : 5V~5.5V)