Power Related Problems; 5-4.1. Cannot Power Printer Mechanism Or Controls On - MINOLTA-QMS 4060 Service And Parts Manual

SERVICE MANUAL
5-4.

Power Related Problems

5-4.1. Cannot Power Printer Mechanism or Controls ON
Explanation
The printer can not be turned on, also the back-light of the operator panel is not lit up.
Troubleshooting Flowchart
<010> Check the power cable and the circuit braker. Is the power cable connected to appropriate
AC voltage power outlet correctly? <Y:020, N:012>
<012> Turn on the circuit braker, and connect the power cable correctly.
<014> Is the printer still unable to turn on? <Y:020, N:Exit>
<020> Is the main switch of the printer set on? <Y:030, N:022>
<022> Turn the main switch on.
<024> Is the printer still unable to turn on? <Y:030, N:Exit>
<030> Remove the rear cover, then check the two LEDs on the power supply PCB and the relay
RL1 on the rear frame of the printer.
<040> Is the POWALM LED lit? When this LED is lit, the overcurrent on +5V (except the
circuits supplied through the relay RL1) or +12V or +24V circuits may be occurred. <Y:300,
N:050>
<050> Is the FANALM LED lit? When this LED is lit, fan4 (fuser cooling fan on the driving unit
M) or fan 5 (power supply cooling fan) may be malfunctioned. <Y:200, N:060>
<060> Is the relay RL1 oscillated like a buzzer? (It may oscillate on about 36Hz. When this relay
is buzzed, the overcurrent on +5V circuits supplied through the relay RL1 may be occurred.)
<Y:150, N:070>
<070> Check the main switch. Is the main line switch malfunctioned?
<Y:072, N:080>
<072> Replace the main swich.
<074> Is the printer still unable to turn on? <Y:080, N:Exit>
<080> Check the stand-by switch. Is the stand-by switch malfunctioned? <Y:082, N:090>
<082> Replace the stand-by switch.
<084> Is the printer still unable to turn on? <Y:090, N:Exit>
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