Ricoh Aficio FT4027, Service Manual

Page: 496 / 685

SM A207/A208/A211 1
DIFFERENCES BETWEEN THE A204/A206/A207/A208/A210/A211
AND A153/A155/A156/A157/A159/A160 SERIES
The models A204/A206/A207/A208/A210/A211 were based on the
A153/A155/A156/A157/A159/A160.
The following table lists the major differences between the 204/A206/A207/A208
/A210/A211 series and the A153/A155/A156/A157/A159/A160 series, and the
pages to refer to in your service manual.
No.
Item
(Section to refer to in
the Service Manual)
(A204/A206/A207/
A208/A210/A211)
(A153/A155/A156/
A157/A159/A160)
Process Control
1 Halftone Mode The halftone mode can be
selected at the operation panel.
The exposure lamp voltage
development bias, and drum
charge voltage are changed to
lower the image density for
halftone originals. Pg 1-19 —
2 ADS Correction
(SP5-106) Five possible correction can be
selected depending on the
customer's requests. Pg 1-19 Three possible corrections can
be selected depending on the
customer's requests. Pg 2-10
3 Toner Supply Control The amount of toner supplied
per unit of time has been
increased to meet the increase
in the copier process speed.
•
0.217 mg/ms for A204 series
•
0.183 mg/ms for A208 series
Pg 1-20
The amount of toner supplied
per unit of time is as follows:
•
0.183 mg/ms for A153 series
•
0.133 mg/ms for A157 series
Pg 2-14
4 V
R
Pattern Correction The V
RP
/V
RG
matrix to
determine the amount of VR
correction to be added has been
changed. It has leaned towards
adding the correction at a earlier
stage. Pg 1-21
V
R
Pattern Correction
Pg 2-18/19
5 Toner Supply in
Abnormal Sensor
Conditions The temperature has been
changed to meet the new drum
charge roller capability.
14
°
C
≤
T < 60
°
C:
Detect Supply Mode
0 < T < 14
°
C:
TD Sensor Supply Mode
T
≤
0, 60
°
C
≤
T:
Fixed Supply Mode Pg 1-22
20
°
C
≤
T < 60
°
C:
Detect Supply Mode
0 < T < 20
°
C:
TD Sensor Supply Mode
T
≤
0, 60
°
C
≤
T:
Fixed Supply Mode
Pg 2-17