Olivetti d-Color MF651 Service Manual page 945

Field Service Ver. 2.0 Jul. 2009
Step Section
13 Image Process
Adjustment
Gradation
Adjust
(Service Mode)
14 Image Process
Adjustment
D Max Density
(Service Mode)
15 Image Process
Adjustment
Stabilizer
Initialize + Image
Stabilization
(Service Mode)
16 Printer control
board (PRCB)
PH relay board
(REYB/PH)
17
Y110571-1
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.
Service Manual
22. IMAGE QUALITY PROBLEM
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/2.
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