JUNE 2002 © TOSHIBA TEC
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e-STUDIO550/650/810 ADJUSTMENT
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 (RMS value) or higher.
• Range
DC1000V
• (+) terminal Connect to the rail for the
main charger.
• (–) terminal Connect to the frame
(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 (RMS value) or higher.
• Range
DC1000V
• (+) terminal Connect to the shaft of the
developer sleeve.
• (–) terminal Connect to the frame
(ground).
3. Set the door switch jig and start up the
adjustment mode (05).
(+)
( - )
Digital
tester
(+)
( - )
Digital
tester
To the rail for the
main charger
To the shaft of the upper
developer sleeve
To the frame
To the frame