Konica Minolta bizhub C200 Service Manual page 383

19. Image quality problem
Step Section
Image Process
Adjustment
→Gradation
13
Adjust
(Service Mode)
Image Process
Adjustment
14
→ D Max Density
(Service Mode)
Image Process
Adjustment →
Image Stabiliza-
tion → Initialize +
15
Image Stabiliza-
tion
(Service Mode)
Printer control
board (PRCB)
16
PH relay board
(REYB/PH)
17
344
Check item
"Conv. Value" falls within the
specified range as checked through
gradation adjust.
Dark: 0 ± 100
Highlight: 0 ± 60
The problem has been eliminated
through the adjust of D Max.
After the Initialize + Image Stabiliza-
tion sequence has been completed,
run gradation adjust.
Check the connection of connectors,
harness, and flat cables between
PRCB and REYB/PH, and correct if
necessary.
The problem has been eliminated
through the checks of steps up to 16.
Field Service Ver. 1.0 Jun. 2008
Result Action
YES Go to step 17.
NO Go to next step.
NO Go to next step.
NO Change printer control board.
Change PH relay board.
NO Change imaging unit.
→ Change PH unit.
→ Change high voltage unit.