Motorola HT1250-LS+ - Page 51

Maintenance 4-15
Bad SINAD
Bad 20dB Quieting
No Recovered Audio
START
Audio at pin 8
of U350?
Check Controller
Ye s
No
Induce or inject 1st IF into
XTAL Filter
IF Freq: 73.35 MHz
Audio heard?
B
Ye s
No
Check 2nd Voltage at
U350 Pin 4
Level
Approx. +6
dBm?
B
Ye s
No
Troubleshooting Flow Chart for Receiver (Sheet 1 of 2)
Check Y350. If OK, check/replace
U350.