6-16
11. Checking the operation of CPU
Is there +5.0V supply on I302 pin 8.
OK
NG
Failure point
Printed wire broke between output of FB319 and I302 power supply pin.
Is 20MHz clock input to I302 pin 11 and 12 at TTL level?
OK
NG
Failure point
X301 failure.
Check the input of 5V "H" pulse from I303 pin 4 are same as I302 pin 7.
(14 msec Typ)
OK
NG
Failure point
Printed wire broke between I303 pin 4 and I302 pin 7.
I302 failure.
To Next Page
Loading...
Need help?
General