Measurement Of Transfer Guide Bias - Toshiba DP1600 Service Handbook

1.11 Measurement of Transfer Guide Bias

The transfer charger bias is applied to the pinch roller and the paper guide plate to prevent the transfer
charger charge from escaping through the recording paper during transfer. To analyze the cause of a
transfer failure which has occurred, you can output the transfer guide bias in the output test at any time
and then measure the voltage.
Important:
Measure the transfer guide bias with the toner cartridge and the process unit taken out from the copier
and the front cover open. Also, keep the front cover switch and interlock switch (front cover) ON by using
the switch jigs (big/small).
<Keys used in operation>
1 3
Power ON
10.OUTPUT TEST
SET
2
5 0
SET
START
CANCEL
2 5 5
SET
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1600/2000/2500 ADJUSTMENT
<Display messages and measurement methods >
FUNCTION TEST
09.CODEC TEST
10.OUTPUT TEST
11.PRINTER BOARD TEST
: Enter the "Developer Bias Transformer ON/OFF" code.
Important:
Before outputting the transfer guide bias, it is necessary to turn
the developer bias ON.
: Developer bias ON
Warning:
High voltage is output from the developer bias terminal. NEVER
touch the terminal while measuring.
: Enter the "Transfer Guide Bias ON/OFF" code.
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Developer bias measuring plate
December 2000 © TOSHIBA TEC
01-11-01