6.4.2 Bias Control In Copy Cycle
The bias output is determined by four factors.
The total bias is described as;
V
B
= V
BB
+ V
BA
+ V
BADJ
+ V
BS
(ADS Mode)
V
B
= V
BB
+ V
BM
(Manual ID Mode)
1) Base Bias (V
BB
)
As explained in the process control section, the base bias for development is
determined by the drum light potential (V
L
) measured in each original scan.
The base bias is also affected by the exposure lamp adjustment setting in the
SP mode.
V
BB
= V
L2
+ 280 –
∆
V + 10 N – 15 M
∆
V = V
L2
– V
r
(Maximum
∆
V = 210, Minimum
∆
V = 110)
NOTE: N = Number of the lamp adjustment setting in SP mode.
M = Number of the Latent Image Adj. in SP mode.
Drum
Potential
Dark
Light
Original Density
V
BB
V
0
Vd
V
L
Vr
A171D528.wmf
DEVELOPMENT
31 July 1995
2-42
Summary of Contents for FT8680
Page 3: ...SECTION 1 OVERALL MACHINE INFORMATION ...
Page 8: ...MEMO 31 July 1995 SPECIFICATIONS 1 5 ...
Page 23: ...6 5 IMAGE OVERLAY MODE 2ND SIDE A171V505 wmf PAPER PATH 31 July 1995 1 20 ...
Page 24: ...SECTION 2 DETAILED SECTION DESCRIPTIONS ...
Page 133: ...Timing Chart 1 Stack 2 Paper Feed A171D551 wmf A171D552 wmf 31 July 1995 DUPLEX 2 109 ...
Page 159: ...SECTION 3 INSTALLATION ...
Page 177: ...SECTION 4 SERVICE TABLES ...
Page 229: ...SECTION 5 REPLACEMENT AND ADJUSTMENT ...
Page 362: ...SECTION 6 TROUBLESHOOTING ...