SERVICE CALL CONDITIONS
G065 4-4 SM
SC Level Symptom Possible Cause
LED current abnormal at initialization
during ID sensor adjustment
353 C
At ID sensor initialization, one of the
following is detected:
At PWM = 255, V
SG
< 4.0 V
At PWM = 0, V
SG
≥
4.0 V
•
ID sensor defective
•
ID sensor harness defective
•
ID sensor connector defective
•
Poor ID sensor connection
•
I/O board (IOB) defective
•
Exposure system defective
•
High voltage supply board
defective
•
Dirty ID sensor
ID sensor adjustment timeout error354 C
V
SG
out of the adjustment target
range (4.0
±
0.2 V) within 20 s at V
SG
initialization.
•
ID sensor defective
•
ID sensor harness defective
•
ID sensor connector defective
•
I/O board (IOB) defective
•
Exposure system defective
•
Poor ID sensor connector
connection
•
High voltage supply board
defective
•
Dirty ID sensor
D
EVELOPMENT
U
NIT
TD sensor error: Test value
abnormal
390 C
TD sensor output voltage is less than
0.5 V or more than 4.8 V after 10
consecutive times during printing.
•
TD sensor defective
•
TD sensor not connected or
connector damaged
•
Poor connection between the TD
sensor and the I/O board (IOB)
•
I/O board (IOB) defective
•
Toner supply defective
TD sensor error: Auto adjust error391 C
At initialization of the TD sensor,
V
T
< 1.8 V or V
T
> 4.8 V.
•
TD sensor abnormal
•
TD sensor disconnected
•
Poor TD sensor connection
•
I/O board (IOB) defective
•
Toner supply defective
Development bias abnormal395 C
A development bias leak signal is
detected. High voltage output to the
development unit exceeded the
upper limit (65%) for 60 ms.
•
High voltage supply board
defective
•
Poor connection at the
development bias terminal
•
Poor connection at the high
voltage supply board
T
RANSFER
U
NIT
Transfer roller bias output abnormal401 C
A transfer roller current leak signal is
detected.
•
High voltage supply board
defective
•
Poor cable connection or defective
cable
•
Transfer connector defective
Transfer roller open error402 C
The transfer roller current feedback
signal is not detected.
•
High voltage supply board
defective
•
Transfer connector cable defective
•
Transfer connector defective
•
Poor PCU connection
Comments to this Manuals