Read Panasonic FA-S280 Service Manual online
2-10
Operation
2.3.5
Reset Circuit
The reset circuit consists of IC3. At power ON, the output (RESET) of IC3 is kept
“L” until VCC (+5V) reaches a certain level. During this period, the CPU is reset.
When VCC drops below a certain level, the output of IC3 becomes “L” to reset the
CPU. When the external overcurrent detection circuit mentioned in 2.3.4 “Lift Motor
Driver Circuit” is activated and the flip-flop is set, the input of IC3 is set to “L”. So,
the output of IC3 is forcibly set to “L” and the CPU is reset.
SD006
C29
R8
D8
From Q of IC5
IC1 CPU
RESET
28
R12
C11
C30
VCC
1
5
2
4
3
R15
IC3 Voltage Detector
M51953AL
M51953AL
VCC
OUT
GND
DC
IN
VCC
SD005
2.3.6
Interlock Circuit
The interlock circuit is used to check whether the sorter is correctly attached the
copier.
When the sorter is attached the copier, the interlock switch is pushed by the interlock
switch push-mechanism attached the copier side bracket.
When the interlock switch is pushed, interlock switch ON signal is sent to the CPU
via inverter IC4. At the same time, the transistor TR1 is turned ON, the relay RL1
is turned ON, and +24V DC is supplied to the motor driver circuit to drive motors.
IC1 CPU
From Q of IC5
[CPU PCB]
+24V
RL1
TR2
D9
F1
TR1
R23
RN5
VCC
R5
CN1
+24V
CN9
3
1
2
C32
Interlock SW
IC4
13
2
16
PB7
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