Gestetner A294, Руководство по обслуживанию

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Rev.9/2001 SERVICE CALL CONDITIONS
SM 7-7 A294/A295
Tr
ouble
-
shooting
SC314: Drum Potential Sensor Error 5
Definition [D]
When adjusting the drum potential (V
H
) for LD power adjustment during
process control initial setting, the first time the V
H
pattern is made, the drum
potential sensor detects that V
H
is more than 500 V.
Possible Causes
• Drum potential sensor defective
•
Poor connection between the drum potential sensor and the BCU
•
BCU defective
•
LDB defective
SC315: Drum Potential Sensor Error 6
Definition [D]
When adjusting V
D
for the unexposed drum during process control initial
setting, V
D
does not reach –900
±
20 V even if V
G
has been adjusted 5 times.
Possible Causes
• Drum potential sensor defective
•
Poor connection between the drum potential sensor and the BCU
•
BCU defective
•
Charge/bias/grid power pack defective
SC316: Drum Potential Sensor Error 7
Definition [D]
When adjusting the drum potential (V
H
) for half tone during process control
initial setting, the drum potential sensor detects that V
H
does not become –265
±
20 V even though the LD power has been changed twenty times.
Possible Causes
•
Drum potential sensor defective
• Poor connection between the drum potential sensor and the IBCU
•
BCU defective
•
LDB defective
•
Poor drum cleaning
SC321: Laser Writing Signal (F-gate) Error
Definition- [B]
The laser writing signal (F-gate) does not go to LOW for more than 15 seconds
after the copy paper reaches the registration sensor.
Possible Causes
•
SICU board defective
•
Poor connection of the printer controller
• Printer controller defective
CÓPIA NÃO CONTROLADA
CÓPIA NÃO CONTROLADA