Thermal Head Up/Down Operation Failure - Sony UP-D898DC Service Manual

2-2-7. Thermal head UP/DOWN operation failure

Thermal head UP/DOWN operation
failure occurs during the printing
operation.
Does the DC motor drive signal
of CN001 on the SU-167 board
change normally?
Yes
Does the DC motor on the
SU-167 board rotate normally?
Yes
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2-10 (E)
Are the harness connecting
CN1101 on the MA-201 board and
No
CN901 on the SW-1703 board and
the harness connecting CN905 on
the SW-1703 board and CN001
on the SU-167 board normal?
Does the DC motor drive signal
at pin 5 (DCM_0) and pin 6
(DCM_1) of CN1101 on the
MA-201 board change normally?
Does the DC motor drive signal
at pin 1 (DCM_0) and pin 2
(DCM_1) of CN905 on the
SW-1703 board change normally?
Replace the SU-167 board or
DC motor assembly.
(Refer to Section 3-10.)
Replace the SU-167 board or
No
DC motor assembly.
(Refer to Section 3-10.)
No
Yes
No
Yes
No
Yes
Connect harness correctly. If the
symptom persists, replace
haeness. (Refer to Section 5.)
Replace the MA-201 board.
(Refer to Section 3-8.)
Replace the SW-1703 board.
(Refer to Section 3-7.)
UP-D898DC