Kyocera KM-4230

2A3/4
2-3-8
2-3-5 Scanner motor PCB
SM
SMPCB
SHPSW
ODSW
OSD1
OSD2*
INPCB
EL
DT2
24 V DC
5 V DC
SM A
SM Vref
SM M1–M3
SM CWB
SM CLK
SM ENABLE
SM A
SM B
SM B
PG
EL
EL ON REM
Driver IC1
Scanner
control PCB
Power
source PCB
* For inch specification only.
Figure 2-3-5 Scanner motor PCB block diagram
The scanner motor PCB (SMPCB) drives the scanner motor (SM), turns the exposure
lamp (EL) on and off, and relays signals from the scanner home position switch
(SHPSW), original size sensor 1, 2 (OSD1, 2) and the original detection switch
(ODSW).
The scanner motor (SM) is driven by turning the output for motor phase switchover on
and off (SM A, SM A, SM B, SM B). It is activated by the driver IC1 processing the
currently set reference signal (SM Vref), mode signals (SM M1 - M3, SM CWB), phase
changeover clock (SM CLK), drive/stop signals (SM ENABLE) from the main PCB.
The exposure lamp (EL) is turned on when the signal (EL ON REM) from the scanner
control PCB (SCPCB) is inverted by DT2 and the resulting lamp on/off signal (EL) goes
low. Signals from the scanner home position switch (SHPSW), original size sensor 1, 2
(OSD1, 2) and the original detection switch (ODSW) are relayed to the main PCB
(MPCB).