Enter the code [9-21-4] in order to switch on
the Main Drive Motor and the Toner Sensor
circuit. Connect the (+) meter lead to the
Toner Sensor A22Q1P1-2 and the (-) meter
lead to A22Q1P1-4.
There is +15 VDC present.
Y N
Check for an open or short circuit to
ground in the wires connected to
A22Q1P1-2 and A22Q1P1-4. If the wires
are OK, replace the Main PWB, A3, PL
1.1.
Connect the (+) meter lead to the Main PWB
A3J303-4 and the (-) meter lead to ground.
There is +5.2 to +6.0 VDC Is present.
Y N
Connect the (+) meter lead to the Toner
Sensor A22Q1-1 and the (•) meter lead to
ground.
There Is greater than +0.2 VDC present.
Y N
Disconnect Toner Sensor A22Q1P1
from A22Q1J1. Connect the (+) meter
lead to the Main PWB A3J303-16 and
the (-) meter lead to ground.
There is greater than +0.2 VDC
present.
Y N
Replace the LVPS, A5, PL 1.1.
if the problem persists, replace
the Main PWB, A3, PL 1.1.
Check for an open or short circuit to
ground in the wires connected to
A22Q1-2 and A22Q1-4. If the wires
are OK, replace the Toner Sensor
A22Q1, PL 9.9. Run [9-21-6] Toner
Sensor Calibration.
B
C
B C
Check for an open or short circuit to
ground in the wire connected to A22Q1P1-
3. If the wire is OK, replace the Toner
Sensor A22Q1, PL 9.9. Run [9-21-6]
Toner Sensor Calibration
Replace the Main PWB, A3, PL 1.1.
LL.90 RAP
11/96
2-10
8830