High-Voltage Adjustment - Toshiba DP4500 Service Handbook

2.5 High-Voltage Adjustment

(1) Preparation
Developer Bias
Developer unit Disconnect the connector.
Remove the drum and
Cleaner unit install the cleaner unit in
the copier.
Developer unit
Not connected
connector of the copier
Connect in the hole at the
(+) terminal
front side of the developer
unit.
Connect to the machine
(–) terminal
frame (to ground).
Function switch
Full-scale
Remarks Use a digital tester with an input resistance of 10 M (RMS value) or higher.
Attach the door switch jig and press the front cover opening/closing switch while the front cover is open.
How to turn on the power
Refer to (b) Connection Refer to (c) Connection Refer to (d) Connection for
for developer bias
Remarks
adjustment.
(a) Installation of the current measuring jig
Notes: 1. Clean the toner recovery auger when the
toner is sticking to it. Then attach the jig.
2. Do not damage the tip of the separation
fingers.
3. Remove the cleaner stay before installing
the jig.
1. Unlock the cleaning blade using the blade
releasing jig. ( Chapter 11.5 [C] in the Serv-
ice Manual)
2. Insert the shaft through the hole at the front side of the cleaner.
3. Put the shaft through the current measuring jig and put it into the rear hole to fix it to the cleaner. Attach
the cleaner stay.
4. Install the cleaner unit in the copier with 2 screws, and connect the jig detection connector with the
connector of the developer unit in the copier.
Fix the green cable of the current measuring jig to the machine frame.
Notes: 1. Set the current measuring jig in the center of the cleaner unit.
2. High-voltage adjustment cannot be performed without connecting the jig detection connector
(except the developer bias adjustment).
December 2000 © TOSHIBA TEC
Main Charger
Remove from the copier. (Not used)
Install the unit together with the current measuring jig in the copier.
NOTE 1:Connect the green cable of the current measuring jig to ground on the
copier frame. Refer to (a) Installation of current measuring jig.
Connect the jig detection conector with the developer unit connector of the
copier.
Connect to the main
Connect with the red cable of the current
charger case (between the
measuring jig.
case and the terminal).
Connect with the white cable of the current measuring jig (to ground).
DC
1,000 V
for main charger transfer/separation charger adjustment.
adjustment.
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Transfer Charger Separation Charger
2V
DP4500/3500 ADJUSTMENT
AC