Read Sharp AL-1000 / AL-1010 (serv.man14) Service Manual online
PIN No.
Signal name
IN/OUT
Connected to
Description
250
/CPUWR
IN
CPU
CPU write signal
251
/CPURD
IN
CPU
CPU read signal
252
GND
Power
253
CPUCLK
IN
CPU
CPU system clock
254
GND
Power
255
TEST
PORT1
PORT1
IN
AUTO SCAN
TEST
TEST
High: Normal Low: Test
256
/SCANST
IN
CPU (I/O)
Scanner process start signal
(3) Reset circuit
This circuit detects ON/OFF of power to control start/stop of each circuit. The 5V voltage of the main PWB is detected by the reset
IC to generate the reset signal.
When the power voltage reaches the specified level, the circuit operations are started. Before the power voltage falls below the
specified level, the circuit operations are stopped to prevent against malfunctions.
IC to generate the reset signal.
When the power voltage reaches the specified level, the circuit operations are started. Before the power voltage falls below the
specified level, the circuit operations are stopped to prevent against malfunctions.
R265 R266
IC108D
C155
IC105
C156
C154
C190
To ASIC
Rest IC
AL-1000/1010
12-13
Click on the first or last page to see other AL-1000 / AL-1010 (serv.man14) service manuals if exist.