Read Sharp AM-400 (serv.man5) Service Manual online
AM-400DE
5 – 27
3. Troubleshooting of control PWB
Display Error
on LCD
Pickup Motor Error
Not rotate
or shortage torque
Not detect roller sensor
PAPER JAM
R265~R268
IC32 (driver)
F6 (fuse)
IC21 (Printer CPU)
CNROLSNS
(Connector)
C,R on route
of CNROLSNS~IC21
D15 (zener diode)
R331~R334
IC21 (Printer CPU)
1
A
LSU Error
SYSTEM ERROR
[P2]
H/V-unit control-circuit
Error
Optical Error
(Laser)
+5V-Regulator Circuit
fail
Control signal fail
CNPM
(Connector)
Q14(Transistor)
Q15(Transistor)
R301
IC21 (Printer CPU)
F5 (fuse)
C202,C206,C207
D14 (Diode)
IC22
(Regulator IC)
R277
Scanning-motor Error
CNLSR
(Connector)
R,C around above
ICs
IC22
(Regulator IC)
IC25~ IC27
IC22
(Regulator IC)
IC23,IC25,
IC28,IC29
R,C around above
ICs
A
2
B
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