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[9] Developing unit
AC
Power
(Relay PWB)
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1. Bias Voltage Adjustment
If the bias voltage is not at the proper level (—230+10V), it
must be adjusted in the following manner.
® Remove the rear cover.
@) Connect the multimeter between the bias terminal and
chassis ground of the power supply PWB.
DC power supply PWB
Connector harness
Digital multimeter
TSW1~4 TSG
SF-7200
™
Connector
(Toner
motor}
Toner hopper
unit
Toner sensor
Developing unit
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.
BIAS
PwB
@) Enter test command 25, and adjust the VR1
so that
the bias voltage should be within the given range.
@
Counterclockwise
turn
of the
bias
adjusting
pot
increases the voltage.
®
Clockwise
turn
of the bias adjusting
pot decreases
the voltage.
2. MG Roller Location
@
Install the MG roller with the machined surface of the
roller shaft facing up.
MG adjusting plate
Machined surface
MG roller
9-1
om"
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