Toshiba e-STUDIO 4500c, Service Manual

Page: 583 / 1120

April, 2007 SERVICE PROGRAM TABLES
5-91
3573 Target Poten:Vd Display Target Potential (VdDisplay)
Vd (read by the potential sensor) is the potential of dark areas of a drum before full
laser exposure. This SP displays the value of Vd used by processing control to
determine the target potential (Vd). The machine performs a calculation using
development gamma, Vk and the maximum coverage, and then uses the result to
lookup and retrieve the correct voltage from the Potential Table. This retrieved value
is used to raise the charge of the charge roller that charges the drums.
3574 Target Poten:Vl Display Target Potential (VlDisplay)
Vl (read by the potential sensor) is the potential of the exposed areas after full laser
exposure. This SP displays the value of Vl used by processing control to determine
the target potential (Vl). The machine performs a calculation using development
gamma, Vk and the maximum coverage, and then uses the result to lookup and
retrieve the correct voltage from the Potential Table. This retrieved value is used to
raise the input current of the laser diode.
001 K
002 M
003 C
004 Y [-999~0/1 V]
3575 Dev DC Control Display Value for Control of Development DC
Displays the deveopment bias that was referenced duing processing control and
used in the the previous jobs (Process control is set for Auto with SP3501 001.)
001 Std Spd:K
002 Std Spd:M
003 Std Spd:C
004 Std Spd:Y [-800~0/1 V]
Std Spd (normal speed): 52 to 128 g/m
2
005 Low Spd:K
006 Low Spd:M
007 Low Spd:C
008 Low Spd:Y [-800~0/1 V]
Low Spd (half-speed): Paper weight 128 o 256 g/m
2
3576 Chrg DC Control Display Value for Control of Charge Roller Bias DC
001 Std Spd:K
002 Std Spd:M
003 Std Spd:C
004 Std Spd:Y [-999 to –200/1 V]
Std Spd (normal speed): 52 to 128 g/m
2
006 Low Spd:K
007 Low Spd:M
008 Low Spd:C
009 Low Spd:Y [-999 to –200/1 V]
Low Spd (half-speed): Paper weight 128 o 256 g/m
2