High-Voltage Adjustment; Main Charger Grid Bias; Developer Bias - Toshiba e-STUDIO650 Service Handbook

3. 5. High-voltage Adjustment

The outputs of the main charger grid bias and developer bias should be checked and adjusted when the
high-voltage transformer has replaced.
The checking and adjusting is performed in the adjustment mode "05".
(1) Preparation
(a) Main charger grid bias
1. Take off the developer unit.
2. Connect the digital tester following the right
figure. Use a digital tester with an input
resistance of 10M
• Range DC1000V
• (+) terminal Connect to the rail for the
main charger.
• (–) terminal Connect
(ground).
3. Set the door switch jig and start up the
adjustment mode (05).
(b) Developer bias
1. Install the developer unit.
At this time, keep the connector of the auto-
toner sensor disconnecting and the
developer unit releasing from the drum (L-
shaped shaft in the vertical direction.)
2. Connect the digital tester following the right
figure. Use a digital tester with an input
resistance of 10M
• Range DC1000V
• (+) terminal Connect to the shaft of the
developer sleeve.
• (–) terminal Connect
(ground).
3. Set the door switch jig and start up the
adjustment mode (05).
JUNE 2002 © TOSHIBA TEC
(RMS value) or higher.
to the frame
(RMS value) or higher.
to the frame
3 - 23
To the rail for the
main charger
(+)
Digital
( - )
tester
To the frame
To the shaft of the upper
developer sleeve
(+)
Digital
( - )
tester
To the frame
e-STUDIO550/650/810 ADJUSTMENT