Xerox Phaser 3120, Service Manual

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4-5
TROUBLESHOOTING
Service Manual
4.1.4 Self Test Button
If the Self-Test button pressed, vertical lines are printed.
Turn the power on while pressing this button, '89' shows in the DCU and the printer is warming up. After
warming-up the printer is in READY Mode, and '88' shows in the DCU. In this mode, without any detection,
the printer begins printing(trial printing and data from the PC). It is convenient to use this mode when the
engine malfunction is detected in the control board.
No. Functi on Enter Up/ Down Stop Remar k
00 Mot or Motor Run Motor Stop
01
MHV
Mhv On Mhv Off -1550V
02 THV(-) Thv Negative On Thv Negative Off
03
THV(+)
Thv O n Thv Off +1300V
04
DEV
Dev On
Supply DEV
Dev Of f
0 : -630V 0 : -430V
05 LSU LSU Run
O n Off Ready
LSU Stop
06
Pic kUp
Pickup On Pickup Off
07
PEmpty
Paper Empt y
08 Sensor
Ex it Feed
09 Cover
Cover Open
10 Fus er Fuser On Fuser Off
11 Hot Bur n HotBurn On
12 Clean Print Clean Printing
13
Thv
Ref er ence
low adequat e high
14
PTL
PTL On PTL O ff
15
FAN
Fan O n Fan Off
16
Manual
Pic kUp
Manual Pickup On Manual Pickup O ff
17
Manual
Sensor Manual Sensor