Canon iR5000 Service Manual page 660

4.2.14 The drum heater fails to operate
General condition
1) Open the front cover, and release the fixing/feeding unit. Is the end
YES: The drum heater is normal.
Environment switch
2) Is the setting of the environment switch located at the left bottom of
NO:
DC controller PCB, AC driver PCB
3) Set the meter range to 12 VDC. Connect the probes of the meter to
NO:
Drum heater (H3)
4) Remove the drum, and set the meter range to Ω Ω Ω Ω Ω x1. Does the index
NO:
YES: Replace the heater control PCB.
4.2.15 The Add Toner message fails to turn on
General condition
1) Is there toner in the hopper?
YES: Go to step 2).
Hopper toner sensor (TS2), DC controller PCB
2) Replace the hopper toner sensor. Is the problem corrected?
NO:
4.2.16 The Add Toner message fails to turn off
Toner (amount)
1) Is there toner in the hopper?
NO:
COPYRIGHT © 2000 CANON INC.
CHAPTER 4 TROUBLESHOOTING IMAGE FAULTS/MALFUNCTIONS
of the photosensitive drum warm? (Do not touch the surface of the
photosensitive drum.)
the machine 'ON" (powered at all times)?
Set it to 'ON'. If set to 'OFF', it is linked to the main power
switch.
J102-B8 (+) and J102-B7 (-) on the DC controller PCB. Is the volt-
age between terminals about 2 V during copying and 0 V during
standby?
Replace the DC controller PCB.
of the meter swing when the probes of the meter are connected to
both ends of the heater?
Replace the drum heater.
Check the wiring; if normal, replace the DC controller PCB.
Supply toner. (Find out how the user is supplying toner.)
2000 2000 2000 2000 CANON iR5000/iR6000 REV.0 JULY 2000
4-47 T