Kyocera AD-63 Service Manual page 276

(1) Formation of magnetic brush
The developing roller consists of a magnet roller with four poles and a sleeve roller. Rotation of the sleeve roller around
the magnet roller entrains toner, which in turn forms a magnetic brush at pole N1 on the magnet roller. The height of the
magnetic brush is regulated by the doctor blade; the developing result is affected by the position of the poles on the
magnet roller and the position of the doctor blade.
A developing bias voltage generated by the high-voltage transformer PCB (HVTPCB) is applied to the developing roller
to provide image contrast.
A
Developing roller
A: Distance between the doctor blade and developing roller; 0.23 to 0.35 mm
MPCB
Doctor blade
Figure 2-1-15 Forming a magnetic brush
TCS
YC9-A5
TNFSOL
YC9-B2
TNS SIG
YC9-A9
DB REM
YC7-1
24 V DC
YC7-2
Figure 2-1-16 Developing section block diagram
S1
90
N1
N1:870 × 10
N2:420 × 10
S1:700 × 10
S2:910 × 10
TCS
TNFSOL
TNS
CN1-1
DB
CN1-2
HVTPCB
2FD/2FF/2FG
88
N2
88
S2
-4
T
-4
T
-4
T
-4
T
2-1-13