Brother International HS-5300 Service Manual - Page 27

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1.4.3 Solenoid Drive Circuit The HS-5000 uses one solenoid while the HS-5300 uses three solenoids. In the HS-5000, the solenoid is activated to rotate the paper feed roller for paper feeding. In the HS-5300, the solenoids are activated to rotate the paper feed roller (1st bin or 2nd bin) for paper feeding or to stop rotation of the regist roller. Engine CPU < Main PCB Jet > ASIC3 Driver PCB +25V P8 SOL_B SOL C Solenoid Drive SOL A Circuit P7 Fig. 2.5 When the SOL_A signal is high, the paper feed roller for the 1st bin starts rotating. When SOL_B signal is high, the paper feed roller for the 2nd bin starts rotating. When SOL_C signal is high, the regist roller stops rotating. 1.4.4 Switch Panel Control Circuit The switch panel control circuit controls the input from the three buttons and the ON/OFF status of the five LEDs. When a button is pressed, the switch signal becomes low and it is detected by the engine CPU through the Jet ASIC3. The ON/OFF status of each LED is controlled by the engine CPU. When the status signal is low, the LED is lit. Engine CPU Main PCB Jet < > ASIC3 Driver PCB I Panel PCB > LED SW FF SW RESET SW ONLINE Fig. 2.6 11-8

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1.4.3
Solenoid
Drive
Circuit
The
HS
-5000
uses
one
solenoid
while
the
HS
-5300
uses
three
solenoids.
In
the
HS
-5000,
the
solenoid
is
activated
to
rotate
the
paper
feed
roller
for
paper
feeding.
In
the
HS
-5300,
the
solenoids
are
activated
to
rotate
the
paper
feed
roller
(1st
bin
or
2nd
bin)
for
paper
feeding
or
to
stop
rotation
of
the
regist
roller.
Main
PCB
Driver
PCB
+25V
P8
Engine
CPU
<
>
Jet
ASIC3
SOL_B
SOL
C
SOL
A
Fig.
2.5
Solenoid
Drive
Circuit
P7
When
the
SOL_A
signal
is
high,
the
paper
feed
roller
for
the
1st
bin
starts
rotating.
When
SOL_B
signal
is
high,
the
paper
feed
roller
for
the
2nd
bin
starts
rotating.
When
SOL_C
signal
is
high,
the
regist
roller
stops
rotating.
1.4.4
Switch
Panel
Control
Circuit
The
switch
panel
control
circuit
controls
the
input
from
the
three
buttons
and
the
ON/OFF
status
of
the
five
LEDs.
When
a
button
is
pressed,
the
switch
signal
becomes
low
and
it
is
detected
by
the
engine
CPU
through
the
Jet
ASIC3.
The
ON/OFF
status
of
each
LED
is
controlled
by
the
engine
CPU.
When
the
status
signal
is
low,
the
LED
is
lit.
Engine
CPU
Main
PCB
Driver
PCB
I
Panel
PCB
<
>
Jet
ASIC3
SW
FF
SW
RESET
SW
ONLINE
>
Fig.
2.6
LED
11-8