Toshiba e-STUDIO4500c Service Manual page 536

SERVICE PROGRAM TABLES
2253 Manual Tnr Fill
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
005 Execute:Col
006 Execute:All Col
2260 Pot.Sn Check
This SP executes a check of all or one selected potential sensor.
001 All Colors
002 K
003 M
004 C
005 Y
2261 Pot.Sn Chk Disp
Displays results of the potential sensor check executed with 2260.
001 Vd:K
002 Vd:M
003 Vd:C
004 Vd:Y
005 Vr:K
006 Vr:M
Notes for SP2261
Reading Definition
Vd Charge bias (Cdc). This is the output
of the potential sensor after –700V is
applied to the drum.
Range: -500 to –700 V
Vr Residual voltage. This is the output of
the potential sensor after the LD fires
at full power.
Normal: -200 V
Voffset This is the reading of the potential
sensor with no charge applied to the
drum.
Normal: 0 10V
Manually Fill Development Unit Sub Hoppers
Executes forced filling of the selected development unit.
Executes forced filling of the Y, M, C development units
only.
Executes forced filling of all development units (Y, M, C,
K).
Potential Sensor Check
Select and press "Execute".
Display the results with SP2261 001 to 012
Potential Sensor Check Results Display
007 Vr:C
008 Vr:Y
009 Voffset:K
010 Voffset:M
011 Voffset:C
012 Voffset:Y
5-44
Abnormal Reading
If the reading is out of range:
Potential sensor damaged
Charge unit malfunction
Charge power pack malfunction
If above –200V:
Drum deteriorated
Toner shield glass dirty
Potential sensor out of position
If reading is out of range:
Potential sensor dirty
Potential sensor out of position
April, 2007