No Image - Ricoh B174 Service Documentation

TROUBLESHOOTING

No Image

Digital Printer
Digital Printer
Digital Printer
Digital Printer
Digital Printer
B174T922.WMF
No Image?
Yes
Self testing
is possible ?
Yes
Check connection to
computer or replace
main board
B174
No
No
Self test
pattern prints?
Take out the cartridge and
prepare the tester for
electronic connection
Is the OPC
terminal of machine
correctly connected
to the frame?
Does the
video data line to
LSU change High/Low
when printing?
The mirror in the LSU might
be misplaced, so the light
path to the OPC deviates -
Replace the LSU or remove
defective parts in the
machine
No
Yes
No
Yes
No
Yes
4-10
A on next
page
Retest after replacing the
connector or main board
Repair or replace the
GND terminal
Check the path between
main board and HVPS.
Replace the defective
board
B174T901.WMF
SM