Ricoh D127 Service Manual page 171

No.
Definition
Polygon motor error: Time out (Off)
203 B
NOT XSCRDY signal becoming "H"
(Inactive) within three seconds.
Polygon motor error: XSCRDY signal error
204 B
Detecting XSCRDY signal "H"
(Inactive) while writing.
LD synchro-detection error
NOT output certain
220 B
syncro-detection signal within
200ms after LD lighting in
steady-rotation.
SM
Symptom
6-5
Possible Cause

Harness and the polygon motor
driver.

Defective the polygon motor or
the polygon motor driver.

Defective polygon motor drive
pulse output (Around polygon
control parts)

Unable to monitor XSCRDY
signal (Around polygon control
parts)

Bad connection or
disconnection between the I/F

Harness and the polygon motor
driver.

Defective the polygon motor or
the polygon motor driver.

Bad connection or
disconnection between the I/F

Bad connection or
disconnection between the I/F
harness and the
syncro-detection Unit.

Defective the syncro-detection

NOT the beam going into the
photo detector

Defective the GAVD related
parts, the LD driver, the LDB,
the BICU
SC Tables
D127/D128