Canon imagePROGRAF IPF9000S, Troubleshooting Manual

Page: 83 / 184

Chapter 4 More Sophisticated Fault Isolation Tasks
3-9
■ How to measure Vh (Printhead drive voltage)
Model
Measurement point
Measurement timing Voltage
iPF5000 Series Main controller J1801-3
While feeding paper
(multisensor illuminating)
＋
21.5V
iPF700 Series
iPF800 Series
iPF8000 Series
Measurement at finely pitched IC pins is impossible.
Check the carriage relay board
flat cable (short) for connection
Replace
the carriage relay board
Replace
the main controller
Abnormal
Abnormal
Flow 4
iPF700/iPF8000 Series only
Check the leading
end position of paper Remove the cause of curling
of the paper
If the leading end of the paper
is shaped improperly, check
the cutter
Feeding failure caused by
paper dust
Feeding failure caused by a
short nip pressure
Leading end of paper not
passing between the LF
roller and pinch roller
Leading end stuck under
the LF roller
Remove LF roller paper dust
Nip cam out of phase
Influenced by curled thick
paper
Nipping failure
Faulty nip spring
Flow 3
Explanatory
drawing 1
Point to check when paper fails to reach the multisensor
See P4-10
IC803
IC3101
IC2801
IC2901
IC3001
IC802
BAT801
IC803
IC3101
IC2
IC2801
IC2901
IC3001
IC802
IC701
IC601
IC1
IC602
IC603
IC604
IC1201
BAT801
J1801 pin 3
Fault isolation for the multisensor failure to illuminate
iPF5000 Series Replace the power PCB
Normal
Replace the multisensor after making
sure it is improperly mounted Check the short flexible cable in the
multisensor and reinsert it
Flow 4
Replace the multisensor reference plate at the same time
iPF700 Series
iPF800 Series
iPF8000 Series
Check for Vh (normal value: 21.5V) on the
main controller while paper is feeding
Abnormal
Flow 2