Read Sharp AL-840 (serv.man5) Service Manual online
(2) Switch
No.
Parts
Note
Code
Signal name
Name
Type
∗
Function/operation
Active condition
1
DSW
DSW
Front cover
open/close switch
open/close switch
Micro switch
Turns on/off the
+
24V power line (power
source for the motor, the high voltage
PWB, and solenoids) when
opening/closing the front cover for
safety. (Detects open/close of the front
cover at the same time.)
PWB, and solenoids) when
opening/closing the front cover for
safety. (Detects open/close of the front
cover at the same time.)
Close
2
POWER SW
Main power switch
Seesaw
switch
switch
Turns on/off the main power line.
(ON/OFF of all power)
(ON/OFF of all power)
Close
(3) Clutch, solenoid
No.
Parts
MODEL
Note
Code
Signal name
Name
Type
∗
Function/operation
Active
condition
1
PUS
PUS
Paper feed clutch
solenoid
solenoid
Solenoid
Controls ON/OFF of the paper feed
roller. (The paper feed roller is driven
by the paper feed clutch solenoid
and the main motor.)
roller. (The paper feed roller is driven
by the paper feed clutch solenoid
and the main motor.)
ON
Driven by
+
24V power.
2
Paper feed clutch
Mechanical
spring type clutch
spring type clutch
Controls ON/OFF of the paper feed
roller. (The paper feed roller is driven
by the paper feed clutch solenoid
and the main motor.)
roller. (The paper feed roller is driven
by the paper feed clutch solenoid
and the main motor.)
ON
1) DSW
2) POWER SW
1) PUS
2)
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