Gestetner G060 Service Manual page 128

SC TABLE
SC No. Item
SC 380 Black When the motor speed is
development within the target level, the
motor error motor sends a lock signal
(High to Low at CN214-5) to
SC 381 Color
the BCU.
development
SC380 is detected under the
motor error
following conditions:
• The Lock signal stays High
• The Lock signal stays Low 2
• The Lock signal stays High
SC 385 ID sensor VSG Vsg is the out of adjustment
adjustment range during a process control
self-check.
error
Adjustment range:
4.0 ± 0.5V
SC 386 Development Any of the following conditions
gamma error K happens three consecutive
times:
SC 387 Development
• When the development
gamma error Y
SC 388 Development
gamma error
C
• When Vk is out of the
SC 389 Development
gamma error
M
• Development gamma
G060
Definition
• Defective motor
• Defective BCU
2 seconds after the motor
turns on.
seconds after the motor
turns off.
for more than 2 seconds
while the motor is on.
• Defective ID sensor
• Dirty ID sensor
• ID sensor
• Dirty drum (cleaning
• Unsuitable toner
• Toner supply
• Laser exposure
gamma is out of the
following range:
0.3 ≤ γ ≥ 6.0
• Image transfer
following range:
-150V ≤ Vk ≥ 150V
calculation error
Related
Possible Cause
SCs
disconnected
incomplete)
density
mechanism problem
problem
problem
4-14
Troubleshooting Procedure
1. Turn the main switch off and on.
2. Replace the motor.
3. Replace the BCU.
1. Turn the main switch off and on.
2. Clean the ID sensor and adjacent
parts.
3. Check the drum cleaning condition.
4. Check the ID sensor connector.
5. Replace the ID sensor.
1. Turn the main switch off and on .
2. Check the process control self-check
result (SP3-975). If the result is not
"1", fix the problem according to the
table in section 4.1.2.
3. Print a full color image by disabling
SC detection (SP5-809-001) and
check if the image quality is OK. If the
image quality is not OK, fix the
problem. Then, enable the SC
detection again.
Type
SM