The Copier Does Not Turn On - Minolta Di200 Service Manual

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The Copier Does not Turn ON.

Power Switch S1
Power Supply Unit PU1
Panel Board PWB-F
Inverter Board 2 PU3
• Touch Panel indicates nothing.
Step
1 Power supply voltage check: the voltage across
PJ1PU1-1 and -3 of Power Supply Unit
changes from AC 0 V to the rated AC voltage
when the Power Switch is turned ON.
2 The voltage across PJ5S1-1 on Power Switch
and GND is DC20 V or more when Power
Switch is turned ON.
3 DC24-V output check: the voltage across
PJ8PU1-2 on Power Supply Unit and GND
changes from DC0 V to DC24 V when the
Power Switch is turned ON.
4 DC5-V output check: the voltage across
PJ6PU1-6 on Power Supply Unit and GND
changes from DC0 V to DC5 V when the Power
Switch is turned ON.
5 DC24-V output check:
Unplug CN1F on Panel Board.
The voltage across CN1F-1 on cable end and
GND, and the voltage across CN1F-2 on cable
end and GND, change from DC0 V to DC24 V
when the Power Switch is turned ON.
6 DC5-V output check:
Unplug CN1F on Panel Board.
The voltage across CN1F-28 on cable end and
GND, and the voltage across CN1F-29 on
cable end and GND, change from DC0 V to
DC5 V when the Power Switch is turned ON.
7 DC24-V output check: the voltage across
CN7F-1 on Panel Board and GND changes
from DC0 V to DC24 V when the Power Switch
is turned ON.
8 AC output check: there is an AC output across
CN2PU3-1 and 4 on Inverter Board 2 when the
Power Switch is turned ON.
Relevant Electrical Parts
Touch Panel UN1
MFB2 Board MFB2
Master Board PWB-A
Check
T-46
Result Action
NO Check the power outlet
voltage.
Check the power cord for
continuity.
Check Power Switch.
YES Change Master Board.
NO Change Power Supply
Unit.
NO Change Power Supply
Unit.
NO Change MFB2 Board.
NO Change MFB2 Board.
NO Change Panel Board.
YES Change Touch Panel.
NO Change Inverter Board 2.