Main Unit Field Service Power Supply Troubles
4-27
IV
Troublshooting
3. Power Supply Troubles
3.1 Machine is Not Energized at All (LV Operation Check)
3.2 Control panel indicators do not Light
Relevant Electrical Parts
Power Switch
Mechanical Control Board (PWB-A)
Low Voltage Unit (LV)
Step Check Item
Location
(Electrical
Component)
Result Action
1
Is the power source voltage being applied to
CN1LV on LV?
12-L NO
Check wiring from
power outlet to PG1 to
CN1LV.
2 Are fuses (F1 and F2) on LV conducting? - NO Change LV.
3
Are DC24 V and DC5 V being applied to
CN5V on the Mechanical Control Board?
10-K∼L
NO Change LV.
YES Change PWB-A.
Relevant Electrical Parts
Print Control Board (PWB-P)
Control Panel (PWB-OP)
Low Voltage Unit (LV)
Step Check Item
Location
(Electrical
Component)
Result Action
1
Is the power source voltage being applied to
CN1LV on LV?
12-L NO
Check wiring from
power outlet to PG1 to
CN1LV.
2 Are fuses (F1 and F2) on LV conducting? - NO Change LV.
3 Is CN10P on PWB-P properly connected? 14-B NO Reconnect.
4 Is CN20P on PWB-OP properly connected? 11-E∼F
NO Reconnect.
YES
Change PWB-OP.
Change PWB-P.
5450_E.book_PDF.book 27 ページ 2005年4月12日 火曜日 午後12時54分
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