Low Image Density - Minolta Di350 Service Manual

FrameMaker Ver.5.5E(PC) Di350 TROUBLESHOOTING
98.12.09

(3) Low Image Density

Section Step
Engine 1 Does the image get better when
a copy is made with new paper
loaded?
2 Is toner empty?
3 Is the image transfer current ter-
minal intact?
4 Is the developing bias terminal
intact?
5 Does the image density remain
low even after the I/C has been
replaced with a new one?
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.
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.
IR 1 Do the connections from CCD to
HGB remain intact?
2 Do the connections from HGB to
UN2 remain intact?
Check Item
T-47
Result
YES Change the paper. Instruct the
user on the storage of paper.
YES Check Sub Hopper Toner
Empty Switch S4 and change
the Toner Bottle.
NO Check and change as neces-
sary.
NO Check and change as neces-
sary.
NO This completes the procedure.
YES This completes the procedure.
YES This completes the procedure.
NO Change HV1, HGB, or UN2, in
that order.
NO Reconnect.
YES Change CCD, HGB, or UN2, in
that order.
NO Reconnect.
Action