Xerox Phaser 6120

Power Supply Errors
Phaser® 6120 Color Laser Printer Service Manual
4-22
Power Supply Errors
Printer Does Not Power ON - LVPS (PU) Operation Check
Control Panel Indicators Do Not Light
Fusing Heaters Do Not Operate
Relevant Electrical Parts
Power Switch
PWB-A (Engine Control Board)
Power Unit (PU)
Step Check Item
Location
(Electrical
Component) Result Action
1 Is the power source voltage being applied to
CN1 on LVPS (PU)?
7-I NO Check wiring from
power outlet PG1 to
CN1.
2 Are fuses (F1 and F2) on PU conducting? - NO Change PU.
3 Are DC24 V and DC5 V being applied to
PJ2A on the Mechanical Control Board?
4-E NO Change PU.
YES Change PWB-A.
Relevant Electrical Parts
Print Control Board (PWB-P)
Control Panel (PWB-OP)
Power Unit (PU)
Step Check Item
Location
(Electrical
Component) Result Action
1 Is the power source voltage being applied to
CN1 on PU?
7-C NO Check wiring from
power outlet PG1 to
CN1.
2 Are fuses (F1 and F2) on PU conducting? - NO Change PU.
3 Is PJ13P on PWB-P properly connected? 13-A NO Reconnect.
4 Is PJ10P on PWB-OP properly connected? 8-D NO Reconnect.
YES Change PWB-OP.
Change PWB-P.
Relevant Electrical Parts
Safety Switch (S2)
Fusing Unit
Power Unit (PU)
Step Check Item
Location
(Electrical
Component) Result Action
1 Is the power source voltage being applied to
CN1 on PU?
The Top Cover and Front Cover should in
closed position at this time.
7-C NO Check wiring from
power outlet PG1 to
CN1.
2 Is the power source voltage being applied to
CN2 on PU?
7-E YES Change the Fusing
Unit.
NO Change PU.