6
.5.3.(7) Solid Black Print
(7-1) Solid black on a full page
Ground
Charge roller
Development roller
Confirmation Items
Confirmation Tasks
Action at NG
(7-1-1) High-voltage contact condition
CH terminal
By visual inspection, look down to check whether high-
voltage terminal of left side of ID unit that protrudes from
the equipment is normal.
Replace the terminal
of equipment side
with a new one.
CH terminal
Check whether the high-voltage terminal of high-voltage
board is in normal contact state. Open the left cover and
remove the high-voltage board, check whether terminal
is installed abnormally.
Reinstall the
terminal normally.
ID unit terminal
By visual inspection, check whether the high-voltage
terminals of ID unit are normally contacted with
contacting ASSY. (Please refer to Figure 7.3)
Replace the ID unit
or correct the high-
voltage terminals.
When trying to use a
new ID unit, please
be careful not to
break the fuse with
jig inside the ID
unit. (Please refer to
page 176)
(7-1-2) High-voltage output condition
CH output
When high-voltage probe is used as maintenance tool,
please open the left cover and check the CH output
from solder side of high-voltage board by high-voltage
probe during printing.(High-voltage probe is not a usual
maintenance tool.)
Replace the high-
voltage board with a
new one.
Figure 7.3
Y108500-4
Service Manual
201