Read Sharp ER-A310 (serv.man2) Service Manual online
2) Print solenoid drive circuit
Since the address bus is used to drive the print solenoid, an access to
the RAM cannot be performed during printing. The common voltage
of the print solenoid is supplied by switching operations of transistors
Q23 and Q19 with the J-COM signal and the R-COM signal.
the RAM cannot be performed during printing. The common voltage
of the print solenoid is supplied by switching operations of transistors
Q23 and Q19 with the J-COM signal and the R-COM signal.
3) Paper feed solenoid and stamp solenoid drive
circuit
PF:
Paper feed solenoid drive signal (Receipt side)
JF:
Paper feed solenoid drive signal (Journal side)
STAMP: Stamp solenoid drive signal (Receipt side)
4) Timing signal circuit
The timing signal
α
is delivered to the CPU by the photo transistor
attached to the printer.
6. Drawer drive circuit
The solenoid is driven by switching operation of transistor Q14 with
the drive signal DR1 from the CPU.
the drive signal DR1 from the CPU.
When an option drawer is used, the parts enclosed with the dotted
line must be attached to the PWB.
line must be attached to the PWB.
IC2
CPU
AD0
AD2
AD4
AD6
AD7
VP : +18V
Q19
B926
R82
2.7K
IC6C
KID65003P
J-COM
R83
220/2W
VJ
D28
1N4002
AD1
AD3
AD5
MG1 0
MG9
IC7B
IC7C
IC7G
IC8B
IC8D
IC7E
IC7D
IC7F
IC8C
IC8A
JM2
JM1
JM3
JM4
JM5
JM6
JM7
JM8
JM9
JM10
VP : +24V
Q20
B926
R84
2.7K
IC6E
KID65003P
R-COM
R85
220/2W
VR
D29
1N4002
AD0
AD2
AD4
AD6
AD7
AD1
AD3
AD5
MG1 0
MG9
IC8E
IC8F
IC9C
IC9E
IC9G
IC9A
IC8G
IC9B
IC9F
IC9D
RM2
RM1
RM3
RM4
RM5
RM6
RM7
RM8
RM9
RM10
IC2
CPU
RF
J F
STAMP
6
1
7
1
6
6
7
VM
IC2
CPU
STAMP
C30
100P
VCC:+5V
C29
10U/16V
α
IC2
CPU
VP : +18V
R53
1K
R54
15K
15K
Q14
C3784
DR1
VP : +18V
R80
1K
Q17
C3784
DR2
DRS
R57
ER-A310:3.3K
ER-A330:4.7K
ER-A330:4.7K
ER-A310:3.3K
ER-A330:4.7K
ER-A330:4.7K
R55
15K
15K
L2
STANDARD DRAWER
OPTION DRAWER
– 13 –
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