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SC CODES
SC
Item
Detection Conditions
No.
SC386 Amount of
The amount of toner obtained
toner on
during YCM ID pattern
sensor pattern
measurement was less than
too low during
(target value for the amount of
ID pattern
toner) minus (threshold value
measurement
for detecting insufficient toner
density) 5 consecutive times,
even though there was no
toner end condition
- If ID sensor error (SC385) is
detected before this SC, no
detection is attempted unless
Vsg is adjusted and the ID
sensor error condition is reset.
- This SC does not apply to
black toner since the toner
end sensor is not used for Bk.
SC387 Drum potential
- Timing -
error
During initial process control
check or interval (number of
copies) process control self
check
- Condition -
While the revolver unit returns
to the home position, the
following condition is detected.
V
< V
D
G
V
> V
D
G
Possible Causes
Defective toner end
sensor, dirt in toner
cartridge end sensor
window
• Uneven charge
• Worn drum
• Defective potential
sensor
– 200V
+ 200V
Related
Troubleshooting Procedure
SCs
This SC is only logged in the memory (not displayed), so
no particular action is required (no adverse influence is
exerted on copier operation).
Defective toner end sensor: SP5-803-010 (Input check:
toner end sensor), replace if necessary.
Dirty toner end sensor window: Clean.
Toner supply seal peeled off: Remove the cartridge and
check the seal in the hopper.
1. Clean the charge corona unit or replace the charge
corona wire and grid plate.
2. Reinstall the drum.
3. Replace the drum if necessary.
4. Replace the potential sensor.
12
24 February 1999
Type
C
C
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