Power Supply Troubles; Machine Is Not Energized At All (Lv Operation Check); Control Panel Indicators Do Not Light - Konica Minolta magicolor 5430 DL Service Manual

Main Unit Field Service
3.

Power Supply Troubles

3.1

Machine is Not Energized at All (LV Operation Check)

Power Switch
Mechanical Control Board (PWB-A)
Step Check Item
Is the power source voltage being applied to
1
CN1LV on LV?
2 Are fuses (F1 and F2) on LV conducting?
Are DC24 V and DC5 V being applied to
3
CN5V on the Mechanical Control Board?
3.2

Control panel indicators do not Light

Print Control Board (PWB-P)
Control Panel (PWB-OP)
Step Check Item
Is the power source voltage being applied to
1
CN1LV on LV?
2 Are fuses (F1 and F2) on LV conducting?
3 Is CN10P on PWB-P properly connected?
4 Is CN20P on PWB-OP properly connected?
Relevant Electrical Parts
Low Voltage Unit (LV)
Location
(Electrical
Component)
12-L
-
10-K∼L
Relevant Electrical Parts
Low Voltage Unit (LV)
Location
(Electrical
Component)
12-L
-
14-B
11-E∼F
4-27
Power Supply Troubles
Result Action
Check wiring from
NO power outlet to PG1 to
CN1LV.
NO Change LV.
NO Change LV.
YES Change PWB-A.
Result Action
Check wiring from
NO power outlet to PG1 to
CN1LV.
NO Change LV.
NO Reconnect.
NO Reconnect.
Change PWB-OP.
YES
Change PWB-P.