SERVICE PROGRAM TABLES April, 2007 5-44
2253
Manual Tnr Fill Manually Fill Development Unit Sub Hoppers
Use SPs to increase manually the supply of toner to the sub hopper of the
development unit to determine if toner supply is abnormal or to recover normal
operation of a color toner supply when image density becomes light. After you
press "Execute" the toner supply cluth switches ON for 2 sec. and then OFF for 0.1
sec. to fill the sub hopper of the development unit. This ON/OFF sequence is
repeated up to 20 times or until the toner end sensor detects that toner is present
in the sub hopper.
001
Execute:K
002
Execute:M
003
Execute:C
004
Execute:Y
Executes forced filling of the selected development unit.
005
Execute:Col Executes forced filling of the Y, M, C development units
only.
006
Execute:All Col Executes forced filling of all development units (Y, M, C,
K).
2260
Pot.Sn Check Potential Sensor Check
This SP executes a check of all or one selected potential sensor.
001
All Colors Select and press "Execute".
002
K Display the results with SP2261 001 to 012
003
M
004
C
005
Y
2261
Pot.Sn Chk Disp Potential Sensor Check Results Display
Displays results of the potential sensor check executed with 2260.
001
Vd:K 007
Vr:C
002
Vd:M 008
Vr:Y
003
Vd:C 009
Voffset:K
004
Vd:Y 010
Voffset:M
005
Vr:K 011
Voffset:C
006
Vr:M 012
Voffset:Y
Notes for SP2261
Reading Definition Abnormal Reading
Vd Charge bias (Cdc). This is the output
of the potential sensor after –700V is
applied to the drum.
Range: -500 to –700 V
If the reading is out of range:
• Potential sensor damaged
• Charge unit malfunction
• Charge power pack malfunction
Vr Residual voltage. This is the output of
the potential sensor after the LD fires
at full power.
Normal: -200 V
If above –200V:
• Drum deteriorated
• Toner shield glass dirty
• Potential sensor out of position
Voffset This is the reading of the potential
sensor with no charge applied to the
drum.
Normal: 0±10V
If reading is out of range:
• Potential sensor dirty
• Potential sensor out of position