Toshiba e-studio205L, Service Handbook, Page: 280 / 672

e-STUDIO205L/255/305/355/455 © 2009 TOSHIBA TEC CORPORATION All rights reserved
ADJUSTMENT
3 - 40
3.8 Adjustment of High-Voltage Transformer
When replacing the high-voltage transformer, you must check each output adjustment of the main
charger bias, developer bias, transfer bias, transfer cleaning bias (positive), transfer cleaning bias
(negative) and separation bias.
3.8.1 Adjustment
[ 1 ] Preparation
Items to check Developer Bias Main Charger
Transfer Bias,
Transfer Cleaning
Bias(positive),
Transfer Cleaning
Bias(negative)
Separation
Charger
Process Unit Take the process unit out of the equipment, an then install the high-voltage transformer
jig to the unit.
High-Voltage
Transformer Jig
Install the high-voltage transformer jig in the equipment.
Note:
Connect the green cable of the high-voltage transformer jig to ground on the
equipment frame.
P.3-41 "[A] Installation of the high-voltage transformer jig".
Digital
Tester
(+) terminal Connect with the
black cable (thick
line) of the high-
voltage
transformer jig.
Connect with the
red cable (thick
line) of the high-
voltage
transformer jig.
Connect with the red
cable (thin line) of the
high-voltage
transformer jig.
Connect with the
gray cable of the
high-voltage
transformer jig.
(–) terminal Connect with the black cable (thin line) of the high-voltage transformer jig.
Function
switch
DC
Full-scale
(range)
1000 V 20 V
Remarks Use a digital tester with an input resistance of 10 M
Ω
(RMS value) or higher.
How to turn ON
the power
Attach the door switch jig and start with the adjustment mode [05] while the front cover
opened.
Note P.3-43 "[B]
Connection for
developer bias
adjustment"
P.3-43 "[C]
Connection for
main charger
adjustment"
P.3-44 "[D]
Connection the transfer
bias, transfer cleaning
bias(positive) and
transfer cleaning
bias(negative)
adjustment"
P.3-44 "[E]
Connection for
separation
charger
adjustment"