Service manual

FrameMaker Ver.5.5E(PC) Di350 TROUBLESHOOTING
98.12.09
T- 4 7
(3) Low Image Density
Section Step Check Item Result Action
Engine 1 Does the image get better when
a copy is made with new paper
loaded?
YES Change the paper. Instruct the
user on the storage of paper.
2 Is toner empty? YES Check Sub Hopper Toner
Empty Switch S4 and change
the Toner Bottle.
3 Is the image transfer current ter-
minal intact?
NO Check and change as neces-
sary.
4 Is the developing bias terminal
intact?
NO Check and change as neces-
sary.
5 Does the image density remain
low even after the I/C has been
replaced with a new one?
NO This completes the procedure.
6 Does the image density become
higher when the “Image Density”
value is changed toward the plus
side? “Image Density” can be
selected as follows: Tech. Rep.
Mode
→
Tech. Rep. Choice
→
Printer.
YES This completes the procedure.
7 Does the image density become
higher when the “VG Adjust”
value is changed toward the plus
side? “VG Adjust” can be
selected as follows: Tech. Rep.
Mode
→
Tech. Rep. Choice
→
Printer.
YES This completes the procedure.
NO Change HV1, HGB, or UN2, in
that order.
IR 1 Do the connections from CCD to
HGB remain intact?
NO Reconnect.
2 Do the connections from HGB to
UN2 remain intact?
YES Change CCD, HGB, or UN2, in
that order.
NO Reconnect.