Toshiba 1550 Service Handbook page 34

Plain paper copier paper feeding unit

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1.10 Checking and Adjustment of Grid Bias/Transfer/Separation Output

Checking and adjustment of grid bias/transfer/separation output is necessary when the high-volt-

age transformer is replaced.

At adjustment mode "05"

Notes: 1. A digital tester with an input resistance of 10 MΩ or more should be used.

Take out the process unit, and then remove

the developer unit, main charger unit and

drum.

Remove the main blade.

Using the drum shaft, install the adjustment

jig in the cleaner unit and then set the main

charger unit.

Set the process unit into the copier and fas-

ten the earth wire of the jig to the machine

frame with a screw. Then connect the black

(WH) side of the jig's 3P-connector to the (–)

terminal and the red (WH) side to the (+) ter-

minal of the digital tester, respectively.

Push down the upper unit. (Be careful not to

allow the jig's cord to be pinched).

"38" grid bias (Black)

"39" transfer charger

"40" separation charger

For measuring the transfer/separation values

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Jig

3P connector

1550 ADJUSTMENT

Earth wire

My-1004