Sharp AL-1550, Руководство по обслуживанию

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2. Circuit descriptions
A. Main PWB (MCU)
(1) CPU signal table
The additional signal is as follows:
Pin No. Signal name In/Out During operation
31 SPPD Input SPF paper transport detection signal
109 SIN3 Input Sensor input 3
115 DMT3 Motor Output Duplex motor control signal
116 DMT2 Motor Output Duplex motor control signal
117 DMT1 Motor Output Duplex motor control signal
118 DMT0 Motor Output Duplex motor control signal
The signals of function change are as follows:
Pin No. Signal name In/Out During operation
119 MRMT3 Motor output Mirror motor/SPF motor control signal
120 MRMT2 Motor output Mirror motor/SPF motor control signal
121 MRMT1 Motor output Mirror motor/SPF motor control signal
122 MRMT0 Motor output Mirror motor/SPF motor control signal
(2) ASIC signal table
The additional signal is as follows:
Pin No. Signal name In/Out Connection Descriptions
201 SGS Output TR array IC
SPF gate solenoid control
signal. “H”: Gate solenoid
ON (R-SPF only)
202 SRRC Output TR array IC
SPF resist roller clutch
control signal. “H”: Clutch
ON (R-SPF only)
203 SPUS Output TR array IC
SPF pickup solenoid control
signal. “H”: Solenoid ON
208 SPFS Output TR array IC
SPF paper feed solenoid
control signal. “H”: Solenoid
ON (R-SPF only)
209 SMSEL Output TR array IC
SPF/mirror motor relay
switch signal. “L”: Mirror
motor, “H”: SPF motor
227 CPFS2 Output TR array IC
2nd cassette paper feed
solenoid control signal. “H”:
Solenoid ON
(3) Input signal table
The additional signals are as follows:
Signal name Descriptions
SPF
SPID SPF paper entry detection signal
SDOD SPF open/close detection signal
SDSW SPF cover open/close detection signal
2nd
CED2 2nd cassette section cassette presence detection
PPD3 2nd cassette section paper transport detection
AL-1550
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