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ERROR CODE and TROUBLESHOOTING
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[CA20] H-Sync detection error
[CF90] Laser optical unit shutter abnormality
Classification Error item
Laser optical unit related service call H-Sync signal detection PC board cannot detect laser beams.
Check item Measures
Laser optical unit. • Connector check (relay connector CN212)
• Harness check
LGC board • Connector check (CN321, CN326)
• +5V check (CN302 - 7pin)
Check should be performed after the front cover and ADU
are closed.
• Board check
Other • Check if the equipment is grounded.
Replace parts Remarks
LGC board
Laser optical unit
Classification Error item
Laser optical unit related service call
Check item Measures
Shutter motor (M38)
Shutter
• Motor check
(Perform the output check: 03-201)
• Connector check (CN213, CN214)
• Harness check
• Shutter plate check
Shutter sensor (home position) (S24) • Sensor check
(Perform the input check: 03-[ALL]OFF/[7]/[E])
• Connector check
• Harness check
Shutter sensor (end position) (S25) • Sensor check
(Perform the input check: 03-[ALL]OFF/[7]/[D])
• Connector check
• Harness check
LGC board • Connector check (CN327)
• +5V check (CN345-21pin)
• Board check
Other • Check if the equipment is grounded.
Replace parts Remarks
Shutter motor
Shutter sensor (home position)
Shutter sensor (end position)
LGC board
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