Olivetti d-Color MF651 Service Manual page 942

22. IMAGE QUALITY PROBLEM
Step Section
14 Hopper unit
15
16 Image Process
Adjustment
TCR Toner Supply
(Service Mode)
17 Image Process
Adjustment
Gradation Adjust
(Service Mode)
18 Image Process
Adjustment
D Max Density
(Service Mode)
19 Image Process
Adjustment
Stabilizer
Initialize + Image
Stabilization
(Service Mode)
20
882
Check item
Connectors are loose.
Gear is cracked.
Toner is properly supplied when
TCR toner supply is run.
"Conv. Value" falls within the speci-
fied range as checked through gra-
dation 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.
The problem has been eliminated
through the checks of steps up to 19.
Service Manual
Field Service Ver. 2.0 Jul. 2009
Result Action
YES Reconnect.
YES Change gear.
NO Go to next step.
YES Go to step 20.
NO Go to next step.
NO Go to next step.
NO Change imaging unit.
Change printer control
board
Change PH unit.
Change high voltage unit/2.
Y110571-1