2-10
Handling, Maintenance, and Repair
1) "Phenomenon"
Find the type of problem in this column.
2) "Condition"
Check the condition of malfunctioning by referring to this column.
3) "Cause"
Locate the cause of the problem by referring to this column. Also, the repair level is indicated
for each cause; use this indication to determine the method of repairing.
4) "Check points and method"
The mechanisms which cause problems as well as check points are listed in this column. Check
the unit as outlined in this column to locate the malfunctioning section.
5) "Repair method"
Repair malfunctioning sections as indicated in this column. If the same problem or
phenomenon reoccurs after the specified repair method is performed, check other items in the
"Cause" column and repair the unit again. The above procedure allows you to locate the cause
of malfunction efficiently by minimizing human error. Also, refer to Fig. 2.13 "Board assembly
terminal arrangement diagram" and Figs. 1.19 and 1.20 "Detailed timing signal T allocation" for
each model for easier check for repair.
2.3.3 Repairing Guide
Table 2.2 Repairing guide
Level
Cause
Condition
Phenomenon
Check point and
method
Repair method
1. The motor
does not ro-
tate.
Even if a print
command is in-
put, the motor
does not rotate.
(1) Poor contact of mo-
tor lead
A
●
Check the continuity
between the motor
lead and board ass’y
and between motor
terminals.
●
Re-solder when no
continuity is ob-
tained.
(2) Malfunction of
power source input
to the motor termi-
nal
B
●
Input power source
check:
check the motor ter-
minal voltage with
the tester or oscillo-
scope.
●
Check the power
supply circuit and re-
pair.
(3) Malfunction of the
motor
B
●
Apply 3.3V to the
moter terminal to
check if the motor ro-
tates.
●
If the motor does not
rotate, replace the
motor unit.
2. The motor ro-
tates but does
not stop.
The motor does
not stop after 1-
print cycle ends.
Malfunction of R detec-
tor
B
●
Rotate the cam trig-
ger unit and check if
the R-detector gener-
ates signals using the
oscilloscope.
●
If reset signal is not
generated, replace
the board ass’y.
(-) black
(+) red
