Ft5535/4527/4522 - Ricoh FT5535 Service Manual

APPENDIX
TABLES & SP MODES FOR PROCESS CONTROL
Table 9:
ID Correction
Development Bias Correction
Step
Voltage
Initial 0V
1st -40V
2nd -80V
NOTE: ID correction steps up (max. twice) when V
exceeds the upper limit over 100 times
continuously.
TD sensor Limitter
Initial: 2.5 ± 0.1V
Upper Limit: Initial + 1.0V
Lower Limit: 1.5V
Table 11:
V Correction
R
V Level
R
± 0V
0 64 ~ 100
1 47 ~ 63
V /V x 100 (%)
RP RG
2 35 ~ 46
3 26 ~ 34
4 0 ~ 25
TONER
SP2-208-001: Toner Supply Mode
1: Detect Supply Mode
2: TD Sensor Supply Mode
3: Fixed Supply Mode
Toner Supply Clutch ON Time:
S x AT x TSC ⁄ 100
ON Time (ms) =
TS
where S = Paper Size (cm
AT = Amount of the toner developed to the latent image for the specific
area = 0.7 (mg/cm
TSC = Toner supply coefficient (%)
TS = Amount of supplied toner for the specific time [constant]
= 0.183 (mg/ms) for A153, A155, A156 copiers
= 0.133 (mg/ms) for A157, A159, A160 copiers

FT5535/4527/4522

Table 10:
ID Correction (V Pattern)
L
Development Bias
ID Correction
Correction Voltage
0V
-40V
TREF
-80V
ID Correction Development Bias
Correction Voltage
-40V -80V
60 ~ 100 54 ~ 100
42 ~ 59 36 ~ 53
30 ~ 41 24 ~ 35
21 ~ 29 16 ~ 23
0 ~ 20 0 ~ 15
2
)
2
) [constant]
Table 12:
TSC: (Detect Supply Mode/TD Sensor Supply Mode)
(V -- V )/
T TREF
0.0196
~ 0
0V
1 ~ 3
-10V
4 ~ 5
-20V
6 ~ 7
8 ~
Supply Ratio:
NOTE: In the TD sensor supply mode,
V = TD sensor output at the moment of
TREF
TD sensor supply mode is selected.
Table 13:
± 0V
TSC: (Fixed Supply Mode)
-40V
-80V
-120V
-160V
TSC (%)
Table 14:
V Determination
TREF
(Detect Supply Mode)
+ ∆ V
V = V
TREF TP
where V
TP
∆ V
REF
V /V
SP SG
~ 0.075
0.076 ~ 0.090
0.091 ~ 0.105
0.106 ~ 0.125
0.126 ~ 0.160
0.161 ~ 0.205
0.206 ~ 0.500
A-3
Supply Ratio
7% 15% 30% 60%
0 0 0 0
7 15 30 60
15 30 45 60
30 45 60 60
60 60 60 60
SP2-222 (Detect Supply Mode)
SP2-208-002 (TD Sensor Supply Mode)
1 (7%), 2 (15%), 3 (30%), 4 (60%)
[15% = default]
SP2-208-003 Data
1 2 3 4
2 4 6 11
[6% = default]
REF
= TD sensor output at V detection
SP
= Difference factor of TD sensor output
∆ V
REF
+4 x 0.0196
+2 x 0.0196
±0
--2 x 0.0196
--4 x 0.0196
--6 x 0.0196
--8 x 0.0196
FSM