Akai PDP4294LV1 Service Manual download pdf (Page 78)

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 .

3. PSU(Power Supply Unit)

Fuse open check

SW1 Normal

Multi-meter Touch point

(5V, Va ,Vs must accord with Module Label)

Vs Voltage ADJ

(Vs : About 180 ~195 V)

Va, 5V(VCC) Voltage ADJ

■

Va : About 55 ~65 V

■

5V(VCC) : 5V~5.5V)

4. Trouble shooting.

if not same

Confirm

input voltage

Adjust

voltages

1 2 ... 73 74 75 76 77 78 79 80 81 82 83 ... 102 103

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Akai PDP4294LV1 Service Manual Page 78