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ENWW Developing unit 65
MFP unit explanation
Dmax (maximum contrast) control
Dmax (maximum contrast) control is
performed by TCSB (toner control sensor
board), M2 (drum), M3 (developing), and so
on under the control of PRCB (printer control
board).
1 Operation
The purpose of Dmax (maximum contrast)
control is to adjust the maximum density to
the reference level for each machine.
a Dmax (maximum contrast) control
1 Method
Several latent images are created at
the maximum laser power, images
are developed with the rotational
speed of the developing sleeve
varied, and then each density is read
by the Dmax (maximum contrast)
sensor (PD1) on TCSB (toner control
sensor board).
PRCB
TCSB
DCPS
24V2
P.GND
12V2
S.GND
MS1 MS2
M3
M2
5V
P.GND
DEVM CONT
DEVM CLK
DEVM CW/CCW
DEVM GAIN
DEVM EM
5V
P.GND
DRUM CONT
DRUM CLK
CW/CCW
DRUM EM
12V
A.GND
DMLED CONT
DM MONI EX
DJLED CONT
DM SIG EX
DRUM JSIG EX
TNLED REF
TEMP
3.3V2