Brother International MD-817 Service Manual - Page 61
reset, START, Replace, msec., Power, brake, msec., synchronizer, without
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2 CPU RUN: OK START CPU pin 27: OK NO #3-2A YES CPU pin 57: OK NO #3-2B YES CPU RUN: OK END Replace IC7. Replace the CPU (IC1) or HIC2 #3-2A CPU pin 27 (reset) +4.5V or more OV 30-40 msec. al- V Power on #3-2B CPU pin 57 (brake out) +4.5V or more OV V Power on 40 or 300 msec. 40 msec.: with synchronizer 300 msec.: without synchronizer - 57 -
2
CPU
RUN:
OK
#3-2A
CPU
pin
27
(reset)
START
CPU
pin
27:
OK
#3-2A
YES
CPU
pin
57:
OK
#3-2B
YES
CPU
RUN:
OK
END
NO
Replace
IC7.
NO
Replace
the
CPU
(IC1)
or
HIC2
+4.5V
or
more
OV
30-40
msec.
al
-
V
Power
on
#3-2B
CPU
pin
57
(brake
out)
+4.5V
or
more
OV
V
Power
on
40
or
300
msec.
40
msec.:
with
synchronizer
300
msec.:
without
synchronizer
—
57
-