Frontier LP7700 - Page 411

Diagnosis appendix: Symptoms result from blowout of fuse
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4. Troubleshooting
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Diagn osis appendix: S ymptoms resul t from blo wout of fuse
Symptoms result from blowout of fuse (printer section/processor section)
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! Laser control PCB
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! Printer I/O PCB 1
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! Printer I/O PCB 3
Reference
☞Laser control PCB ☞Printer I/O PCB 1 ☞ Printer I/O PCB 3
☞Quad magazine PCB ☞CVP PCB ☞Processor I/O PCB 1
☞Processor I/O PCB 2 ☞Processor relay PCB ☞Power supply
☞Condition of checking for the blowout of
fuse
Fuse No. Symptom
F1 T3.15 A/125 V (protection of
+24 V-1 input power supply
from laser power supply)
• No.06076-00001 Polygon Mirror control error. occurs when starting printing.
• By input check, it is observed that Polygon Mirror Synchronous is Asynchronous in the
exposure engine section. In addition, Polygon Mirror Frequency turns 0.
F2 T3.15 A/125 V (protection of
+24 V-3 input power supply
from laser power supply)
• In Printer Information on Status Display, Laser temperature control status does not
change from Temperature control started for five minutes or more.
• The laser control box cooling fan, laser unit cooling fans 1 and 2 are not rotating.
• By output check, turning the laser unit heater on in the exposure engine section does not
raise the temperature.
F3 T3.15 A/125 V (protection of
+24 V-2 input power supply
from laser power supply)
• In Printer Information on Status Display, Laser temperature control status does not
change from Temperature control started for five minutes or more.
• By input check, the following are confirmed.
The display of Polygon Mirror Synchronous is Asynchronous in the exposure engine
section.
The display of Polygon Mirror Frequency is 0 in the exposure engine section.
The display of Laser Unit Thermosensor is 0 degree in the exposure engine section.
Fuse No. Symptom
F32 T6.3 A/125 V (protection of
IL24 V-1 input power supply
from printer power supply 1)
• No.06136-00001 Exposure Advance Pressure Change Motor 1 operation error.
occurs.
F33 T6.3 A/125 V (protection of
IL24 V-1 input power supply
from printer power supply 1)
The following symptom appears when the power supply is turned on.
• No.06137-00001 Exposure Advance Pressure Change Motor 2 operation error.
occurs.
• No.06186-00001 Exposure Advance Pressure Change Motor 3 operation error.
occurs.
• No.06049-00001 Pressure Guide operation error. occurs.
F34 T3.15 A/125 V (protection of
+24 V input power supply
from printer power supply 3)
No malfunctions in the operations will occur on this condition.
F35 T6.3 A/125 V (protection of
IL36 V input power supply
from printer power supply 2)
No.06013-00001 Paper did not load. Paper Magazine B occurs when printing is started
using magazine B.
Fuse No. Symptom
F37 T6.3 A/125 V (protection of
IL24 V-3 input power supply
from printer power supply 1)
No.06138-00001 Paper Advance Arm Motor (Left) operation error. occurs.
F38 T6.3 A/125 V (protection of
IL24 V-4 input power supply
from printer power supply 1)
No.06141-00002 Lane Select Motor (Right) operation error. occurs.
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