Blank Copy; Black Copy - Minolta Di350 Service Manual

FrameMaker Ver.5.5E(PC) Di350 TROUBLESHOOTING
98.12.09

(1) Blank Copy

Section Step
Engine 1 Is toner empty?
2 Is the drive transmission mechanism to
the Developing Unit in good condition?
3 Is the image transfer current terminal
intact?
4 Does the laser shutter (the one located
on the laser beam path between the PH
Unit and PC Drum) open and close
properly?
5 Does the I/C Shutter open and close
properly?
IR 1 Is the Scanner drive transmission mech-
anism in good condition?
2 Do the connections from CCD to HGB
remain intact?
3 Do the connections from HGB to UN2
remain intact?

(2) Black Copy

Section Step
Engine 1 Is the PC Drum charge voltage terminal
in good condition?
2 Is the grid voltage terminal in good condi-
tion?
3 Is the developing bias terminal in good
condition?
4 Does a black copy persist even after the I/
C has been replaced with a new one?
IR 1 Does the Exposure Lamp turn ON when
"ON" is selected for "Lighting Exposure
Lamp"? "Lighting Exposure Lamp" can
be selected as follows: Tech. Rep. Mode
→ Movement Check → Scanner.
2 Does the voltage across CN13BCR-1 on
BCR and GND change from DC24V to
DC0V when step 1 is performed again?
3 Is an AC voltage output from INV to
Exposure Lamp when step 1 is per-
formed again?
4 Are the mirrors and lens installed prop-
erly?
5 Are the mirrors and lens dirty?
Check Item
Check Item
T-46
Result
YES Check Sub Hopper Toner Empty
Switch S4 and change the Toner Bot-
tle.
NO Check and change as necessary.
NO Check and change as necessary.
NO Adjust so that the shutter opens and
closes properly.
YES Change HV1, PH Unit, or PWB-A, in
that order.
NO Adjust so that the shutter opens and
closes properly.
NO Check and change as necessary.
NO Reconnect.
YES Change CCD, HGB, or UN2, in that
order.
NO Reconnect.
Result
NO Check and change as necessary.
NO Check and change as necessary.
NO Check and change as necessary.
YES Change HV1 or PWB-A.
YES Perform steps 4 and onward.
NO Check connectors and harnesses and
perform steps 2 and 3.
NO Change BCR, HGB, or UN2, in that
order.
YES Change LA2.
NO Change INV.
NO Install them properly.
YES Clean or change.
Action
Action