Ricoh B064 SERIES Service Manual page 454

B064 SERIES SERVICE MODE
SC No.
312 C Potential sensor calibration error 3
During drum potential sensor
calibration when adjusting the drum
potential (VD), the drum potential
sensor detects VD higher than VG
(grid voltage).
-or-
When adjusting VD (drum surface
potential of black areas after
exposure), even after 5 adjustments
of VG (charge corona grid
potential), VD could not be set in
the target range (–800±10 + VL +
130V)
314 C Potential sensor calibration error 4
During drum potential sensor
calibration when adjusting the drum
potential (VH) for LD power
adjustment, the first time the VH
pattern is made, the drum potential
sensor detects that VH is more than
500V:
VH > |–500 + VL + 130| V
315 C Potential sensor calibration error 5
During drum potential sensor
calibration, when –100V is applied
to the drum, the output value is out
of the prescribed range.
316 C Potential sensor calibration error 6
During drum potential sensor
calibration, when –800V is applied
to the drum, the output value is out
of the prescribed range.
317 C Potential sensor calibration error 7
During drum potential sensor
calibration, when VL is adjusted, the
pattern surface potential VL pattern
is not within range 0V ~ –400V. (VL
is the potential after exposing a
white pattern.)
321 D No laser writing signal (F-GATE) error 1
The laser writing signal (F-GATE)
for the IPU does not go LOW within
60 s.
B064 Series/B140 Series
/B246 Series/D052 Series
CÓPIA NÃO CONTROLADA
Symptom
4-16
CÓPIA NÃO CONTROLADA
Possible Cause
• Potential sensor defective
• Potential sensor harness disconnected
• Potential sensor connector defective or
disconnected
• BCU defective
• OPC connector defective
• Development power pack defective
• Charge corona unit worn out, dirty
• Potential sensor defective
• Potential sensor harness disconnected
• Potential sensor connector defective or
disconnected
• BCU defective
• OPC connector defective
• LD defective
• Potential sensor defective
• Potential sensor harness disconnected
• Potential sensor connector defective or
disconnected
• BCU defective
• OPC connector defective
• Development power pack defective
• Potential sensor defective
• Potential sensor harness disconnected
• Potential sensor connector defective or
disconnected
• BCU defective
• OPC connector defective
• Development power pack defective
• Potential sensor defective
• Potential sensor harness disconnected
• Potential sensor connector defective or
disconnected
• BCU defective
• OPC connector defective
• Charge corona power pack defective
• Development power pack defective
• IPU board defective
• PCI bus between controller board, IPU
board defective
SM