Main Scan Skew Adjustment - Gestetner B147 Service Manual

LASER EXPOSURE

Main Scan Skew Adjustment

[C]
The 3rd mirror positioning motors for magenta [A], cyan [B], and yellow [C] adjust
the angle of the 3rd mirrors [B] respectively, based on the 3rd mirror position for
black. This mechanism corrects main scan skew.
6.6.7 DIFFERENCES IN THE COPY AND PRINTER MODES
To improve reproduction in the copy mode, the machine generates the print image
with 2 bits per pixel. Different parameters are used for the copy and print modes as
shown in the table below.
Function
Gradation for printing
LD control
Pointer table display
M/A target
M/A target for LD correction
B147/B149/B190
[B]
Copy Mode
2 bits / pixel
SP2-103-101 to -110
SP3-902-5 to -8
SP3-903-5 to -8
SP3-904-5 to -8
6-48
[D]
[A]
B146D528.WMF
Printer Mode
1 bit / pixel
SP2-103-1 to -59
SP3-902-1 to -4
SP3-903-1 to -4
SP3-904-1 to -4
SM