Troubleshooting

Table 5-7. Component Repair of the C211 MAIN Board (continued))

Condition

Cause

Checkpoint

Solution

 

 

 

 

Symptom : CR does not operate normally.

CR motor does not rotate Sub gate array IC16

Check the waveform for the

Replace the MAIN

normally.

is defective.

signals HPASEA/B (Pin 7) output

board or IC16.

 

 

from the IC19/20.

 

HPASE on the IC20 (Pin 7)

OUTA on the IC19 (Pin 10)

 

Waveform (9)

 

CPU is defective.

⎯

Replace the MAIN

board.

 

 

IC19 or IC20 is

Check the the ￿￿ drive waveform Replace the IC19 or

defective.

for the signals ￿￿￿!"# (Pin 10/15)

IC20.

 

output from the IC19/20.

 

 

(See the waveform (9))

 

 

 

 

CR motor is

Check if the resistance of the

Replace the CR motor.

defective.

motor coil is as follows;

 

 

5Ω ± 7 % at 25°C per phase

 

 

(Refer to Table 5-1.)

 

Symptom : The printer feeds paper abnormally.

PF motor does not

Sub gate array IC6

Check the waveform for one of

Replace the MAIN

operate normally.

is defective.

the following signals output from

board.

 

 

the IC17:

 

 

 

PFA0/1 (Pin1/2)

 

 

 

PFB0/1 (Pin 23/24)

 

Pin 1 on the IC17

Pin 6 on the IC 17

 

 

Waveform (10)

 

 

 

CPU is defective.

⎯

Replace the MAIN

 

 

board.

 

 

 

 

 

 

 

 

 

 

IC17 is defective.

Check the wavefoarms for one of Replace the MAIN

 

 

 

the following signals output from

board.

 

 

 

the IC17:

 

 

 

 

PFA0/1 (Pin 2/1)

 

 

 

 

PFB0/1 (Pin 23/24)

 

 

 

 

(Refer to the waveform (10).)

 

 

 

 

 

 

 

 

PF motor is

Check if the resistance of the

Replace the PF motor.

 

 

defective.

motor coil is as follows;

 

 

 

 

10Ω ± 10 % at 25 °C

 

 

 

 

(Refer to Table 5-1.)

 

 

 

 

 

 

 

 

 

 

 

 

5-12

Rev. A