Motorola HT1250-LS+ - Radio Calls and Signaling; Making and Receiving Selective Calls

Maintenance 4-9
Bad SINAD
Bad 20dB Quieting
No Recovered Audio
START
Audio at pin 8
of U3101?
Check Controller
Ye s
No
Induce or inject 1st IF into
XTAL Filter
IF Freq: 44.85 MHz
Audio heard?
B
Ye s
No
Check 2nd Voltage at
U3101 Pin 4
Level
approx. +6
dBm?
B
Ye s
No
Troubleshooting Flow Chart for Receiver (Sheet 1 of 2)
Check Y3200. If OK
check/replace U3101