User Guide

Flow chart of Troubleshooting and Circuit Diagram 5-14
5-8 Receiver Part
Receiver does not work
Ye s
EAR400 pin 2, 3 = short ? Resolder EAR400
EAR400 pin 2, 3, 6 = 1.5V ?
No
No
Replace the PBA
Ye s
Ye s
Replace the PBAU230 pin 4, 8 = "L" ?
CN200 pin 18, 20 = 1.5V ?
Resolder R219, R220
and U230
No
Ye s
Ye s
No
Check the REC pins
No
Modify the REC pins
Is Receiver working?
Ye s
Change the Receiver
No
Ye s
END