Ricoh D146 Service Manual page 544

Service Call 501-584
SC No. Level
SC547-01 D
SC547-02 D
SC547-03 D
D146/D147/D148/D149/D150
Error Name/Error Condition/Major Cause/Solution
Zero cross error (relay-contact soldering)
In the event of an error
§
Fusing relay defective (contact soldering)
§
Fusing relay drive circuit fault
§
Turn the main power supply switch OFF/ON
§
If the fusing relay is damaged, replace the PSU
§
Check the connection between PSU and control board, and
replace harness and board if necessary
Zero cross error (relay contact fault)
In the event of an error
§
Fusing relay damage (contact open)
§
Fusing relay drive circuit fault
§
PSU fuse (24VS) blowout
§
Turn the main power supply switch OFF/ON
§
If the fusing relay is damaged, replace the PSU
§
Check the connection between PSU and control board, and
replace harness and board if necessary
§
If the PSU fuse (24VS) blows out, replace the fuse
Zero cross error (low-frequency error)
In the event of an error
Frequency instability of commercial power line
§
Turn the main power supply switch OFF/ON
§
Check the power source
§
Check the connection between PSU and control board, and
replace harness and board if necessary
5-70 SM