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CHAPTER 6
M- 11
"16 TONER LOW" indicator does not light properly.
Possible cause Step
EP-E c a r t r i d g e 1
HIghmvollage
2
power supply
(high-voltage
contacts)
D C
rontrollcr
3
PCB
HtgbVOltag~
powrr supply
M - 12
Faulty Pick-up Motor
step
'
2
Sensor
PCB
Pick-up motor
3
_
Pick-up molar
driver PCB
DC controller
PCB
1
6 - 34
Check
Shake the cartridge following the
instructions. and load it in to the
printer. Does the message disappear7
Turn
lhr printer OFF. connect the
,
printer driver tester, and turn the
power back ON. Does the TONER
SENSOR LED of the tester light for a
while aftw the power swKch is turned
ON.
Check
Are the ronneclors (J60 1. J602) from
connector 5201 on the DC controller
PCB to connector J701 on the sensor
contact?
PCB making good
Are the connectors 5701 and J702 on
the sensor PCB properly aligned ?
About on? second after switch is
turned ON. do the voltages between
the following pairs of terminals on the
pick-up motor driver PCB change from
about 24 VDC to about 15 VDC?
. J701-Al (PA) and J701-A5 (GND)
' 570 l-83 (PB) and 570 1 -A5 (GND)
1
Result
v--
The toner is insufficlent.
Prepare a new cartridge.
Clean the high-voltage
contact.
Replace the DC controller
PCB.
Replace the high-voltage
power supply PCB.
1
/
Result
Reattach the connectors
Replace the sensor PCB
___+_-
driver PCB. If the problem
persists after replacing the
PCB. replace the DC
controller
Procedure
Procedure
____~
P C B .
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