Read Sharp AR-FN2 (serv.man10) Service Manual online
B. Solenoid drive circuit
[a] Boomerang solenoid (BS)
BS is the open-frame type solenoid.
By the operation of this solenoid, the large gear is rotated in linkage with the transport motor. In addition, the boomerang in the paper exit section is
rotated in linkage with the large gear. The drive signal from G/A (IC 5-32 pin) is inputted to the gate of FET (Q12).
D1 is used to absorb surging when turning off the solenoid.
R20 is for protection of G/A, and C114 is for absorbing noises. R113 is the pull-down resistor.
By the operation of this solenoid, the large gear is rotated in linkage with the transport motor. In addition, the boomerang in the paper exit section is
rotated in linkage with the large gear. The drive signal from G/A (IC 5-32 pin) is inputted to the gate of FET (Q12).
D1 is used to absorb surging when turning off the solenoid.
R20 is for protection of G/A, and C114 is for absorbing noises. R113 is the pull-down resistor.
[b] Reverse solenoid (PRSL)
PRSL is the open-frame type solenoid.
By the operation of this solenoid, the flapper is switched to change the document transport path.
Solenoid ON: Not reversed, Solenoid OFF: reversed
The drive signal from G/A (IC 5-34 pin) is inputted to the gate of FET (Q14).
The drive signal (ON at H) controls PWM, and the ON duty is variable in the range of 0
By the operation of this solenoid, the flapper is switched to change the document transport path.
Solenoid ON: Not reversed, Solenoid OFF: reversed
The drive signal from G/A (IC 5-34 pin) is inputted to the gate of FET (Q14).
The drive signal (ON at H) controls PWM, and the ON duty is variable in the range of 0
~
100% (255 steps).
D3 is for absorbing serge when the solenoid is OFF.
D1 is used to absorb surging when the solenoid is turned off.
R22 is for protection of G/A. C117 is for absorbing noises. R105 is the pull-down resistor.
D1 is used to absorb surging when the solenoid is turned off.
R22 is for protection of G/A. C117 is for absorbing noises. R105 is the pull-down resistor.
[c] Paddle solenoid (PDS)
PDS is the flapper-type solenoid.
By the operation of this solenoid, paddle is rotated in linkage with the transport motor.
The drive signal from G/A (IC 5-33 pin) is inputted to the gate of FET (Q13).
The drive signal (ON at H) controls PWM, and the ON DUTY is variable in the range of 0
By the operation of this solenoid, paddle is rotated in linkage with the transport motor.
The drive signal from G/A (IC 5-33 pin) is inputted to the gate of FET (Q13).
The drive signal (ON at H) controls PWM, and the ON DUTY is variable in the range of 0
~
100% (255 steps).
D3 is for absorbing serge when the solenoid is OFF.
D2 is used to absorb surging when the solenoid is turned off. R21 is for protection of G/A. C116 is for absorbing noises. R104 is the pull-down
resistor.
D2 is used to absorb surging when the solenoid is turned off. R21 is for protection of G/A. C116 is for absorbing noises. R104 is the pull-down
resistor.
Boomerang solenoid input circuit
Boomerang solenoid
(BS)
(BS)
Reverse solenoid drive circuit
Reveerse solenoid
(PRSL)
(PRSL)
Paddle solenoid drive circuit
Paddle solenoid
(PDS)
(PDS)
11 – 9
Click on the first or last page to see other AR-FN2 (serv.man10) service manuals if exist.