Scanner Drive Pcb - Kyocera Mita KM-4530 Service Manual

2-3-4 Scanner drive PCB

Main PCB
The scanner drive PCB (SDPCB) drives the scanner motor (SM), turns the exposure lamp (EL) on and off, and relays
signals from the scanner home position switch (SHPSW), the original size detection sensor 1 (OSDS1), the original size
detection sensor 2 (OSDS2*) and the original detection switch (ODSW).
The scanner motor (SM) is driven by turning the output for motor phase switch over on and off (SM A, SM _A, SM B, SM _B).
It is activated by the stepping motor driver IC processing the currently set reference signal (SM Vref), drive mode signals
(SM M1 to M3, SM CWB), phase switch over clock (SM CLK), and drive/stop signals (SM ENABLE) from the main PCB
(MPCB).
Scanner drive PCB
SM Vref
SM M1
SM M2
Stepping
SM M3
motor
SM M4
driver IC
SM CLK
SM CWB
SM ENABLE
Driver
Figure 2-3-7 Scanner drive PCB block diagram
SM A
SM _A
SM
SM B
SM _B
INPCB
EL
Switches
and
sensors
2BC/D
*: Inch model only.
2-3-19