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Carriage motor does not move, or the motor vibrates and it does not operate properly
.
NO.
Cause of Trouble
1
Carriage
Motor,
Drive cir-
cuit or Logic circuit
Check Point
Check waveform of IC106 collector.
Pin
0
of IC106
uUliL
Repair Method
•
If collector
waveform
is
okay,
check
the con-
nector
(CN106).
Pin
@
,
@
of IC106
UuLJL
•
If
collector
waveform
Pin @,
®
of IC106~
Pin
0
of IC106
__f1_S7SL_
Check the waveform
of
IC106 base.
and the connector are
okay,
the
Carriage
Motor is faulty.
•
If
collector
waveform is
bad, IC106
is
faulty.
Pin
@
of IC106
~
•
If base
waveform
is
bad
,
CPU periphery is
Pin
@
of
IC106
~
faulty.
Pin
@
of IC106
~
Pin
®
of IC106
Lf7_f7_17_
®
Paper Feed
Motor
does not move or the motor
vibrates and
it does
not
operate properly.
NO.
Cause
of Trouble
Paper
Feed
Motor,
Drive
circuit or
Logic
circuit
Check Point
Check
waveform of
IC107
collector
.
Pin
0
of IC107
Pin
@, @
of IC107
____fljl_JL
Pin
@,
®
of IC107
~
Pin
G)
of
IC107
__n_n_n__r
Check the
waveform of
IC107 base.
Pin
@
of
IC107
~
Pin
@
of
IC107
~
Pin
@
of
IC107
7_17__f7_JL_
Pin
®
of
IC107
Uu7__f7_
-48
-
Repair Method
• If collector waveform is
okay,
check
the con-
nector (CN107)
.
• If
collector
waveform
and
connector
are
okay,
the Paper Feed
Motor is faulty
.
• If collector waveform is
bad, IC107 is faulty.
• If base
waveform
is
bad, CPU periphery
is
faulty
.
11.2
Troubleshooting
Flow Chart
START
NG
Power
supply
problem
OK
(See page 50)
NG
Initial operation problem
OK
(See page 51)
NG
Function Key and Keyboard problem
OK
(See
page 52·53)
NG
Paper feed system problem
OK
(See
page 54)
NG
Print problem
OK
(See
page
55·56)
NG
Interface system problem
(See
page
54)
NG
RAM problem
(See
page 57)
END
-
49-
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