Code
No.
Error
SP No.
(Displays
Values
Only)
Potential Causes Note
92 V
SG
Error
3-2 (V
SG
) 1. ID Sensor
2. Dirty ID Sensor
3. Drum Deterioration
• In a fairly new machine,
this is caused by the ID
sensor or electrical noise.
• Check the ID sensor or
the grounding.
• If the machine is not
new, it is caused by a
dirty drum or ID sensor.
93
12-step
Pattern
Error
1. LD Unit
2. Noise
3. Quenching Lamp
• Check the LD unit or
SBU.
94
Development
Gamma
Calibration
Error
3-121-1 to
3-121-4
(gamma
MA)
3-122-1 to
3-122-4
(V
K
)
1. Development Unit
2. Drum Potential Sensor
3. ID Sensor
4. Electrical Noise
• Larger gamma
-Electrical Noise (new or
fairly new machine)
- Toner Concentration too
high (not for a new
machine)
• Smaller gamma
-Toner concentration too
low (needs toner
agitation)
-Development unit
installation error
-Not enough developer
• V
K
error
Not enough waiting time
allowed before the
forced process control
self check.
95 V
min
Error
3-910-1
(Bk)
3-910-2 to
3-910-4
(Color)
1. ID Sensor
2. Dirty ID Sensor
3. Drum
4. Development Unit
5. Lower Toner
Concentration
• New or fairly new
machine: ID sensor or
electrical noise
• Check the development
unit or drum unit.
• Not new machine: Dirty
background
96 V
R
Error
3-111 1. Residual Voltage on Drum
2. LD Unit
99
Other
Checks
1. Humidity and
Temperature Sensor
(on the I/O control board 1)
2. Others etc.
• Operation error (e. g. the
door was open during the
process control self
check)
PROCESS CONTROL
A166/A187/A189 2-12 SM
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