Troubleshooting
Rev. A
5-11
Table 5-7. Component Repair of the C211 MAIN Board (2)
Symptom Condition Cause Checkpoint Solution
CR does not
operate
CR motor
does not
IC17 is defective. Check the PF drive waveform
output from the IC17.
Replace the IC17.
normally. operate
normally.
CR motor is
defective.
Check if the resistance of the
motor coil is as follows;
5
7 % at 25••/phase
(Refer to Table 5-1.)
Replace the CR
motor.
The printer
feeds paper
abnormally.
PF motor
does not
operate
normally.
Sub gate array
IC16 is defective.
Check the waveform output
from PFA0/1 (Pin 1 or 2) or
PFB0/1 (Pin 23 or 24)of the
IC16.
PFA/PFB
PF drive output
Replace the
MAIN board.
CPU is defective. Replace the MAIN
board.
IC16 is defective. Check the waveforrm output
from the A (pin 6), /A (pin 3), B
(pin 8), or /B (pin 21) of the
IC16.
(Refer to the figure above.)
Replace the MAIN
board.
PF motor is
defective.
Check if the resistance of the
motor coil is as follows;
10
10 % at 25••
(Refer to Table 5-1.)
Replace the PF
motor.
Self-test does
not perform
printing.
Sub gate array IC6
is defective.
Check the waveform output
from the SBDATA (pin 24) of
the IC19 and SCDATA (pin 24)
of
the IC18 during the self-test.
SBDATA
Commono signal
Replace the MAIN
board.
CPU is defective.
Replace the MAIN
board.
Common driver IC
18 and IC19 are
defective.
Check the common signal
waveform output from the pin
18, 19, or 20 of the CN13 or pin
20, 21 or 22 of the CN12.
(Refer
to the figure above.)
Replace the MAIN
board or IC18 and
IC19.
Printhead is
defective.
Replace the
printhead.
CAUTION
EEPROM must not be replace alone.
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