Sam4s ER-650 Series Service Manual page 65

8-9 IRC Serial Communication Problem
IRC Problem
Loop Back
Failure ?
N
Communication
Failure?
N
End
SAM4S ER-650 SERIES
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Y
1. Perform the "SELF TEST" in the S-MODE using the Loop
Back test Connector.
2. Check the Tx,Rx Pin on I/F PBA.
3. Check the 75176 Driving Chip and related Circuit on I/F
PBA.
Y
1. Check the connection of the IRC Connector and Other
side.
2. Check the IRC Cable whether it is open or short.
3. Check whether Signal is affected by the Cable Noise.
8 Trouble Shooting
8-9