Midland 70-1341, Service Manual

Page: 35 / 68

SERVICING
70-1341/1344/1441/1444
4 - 11
Troubleshooting Chart 3 – 4b — Receiver Problem (Continued)
NO NO
YES
NO NO
YES YES
YES
YES
NO YES
No squelch?
Suspect RV402
45 MHz
at XF201,
L215, L216
and L217?
NO
NO
NO
YES
YES
Signal
distorted?
44.545 MHz
at X201?
1
NO
RV402 OK?
IC402
pin 6 goes
Low to High
adjusting
squelch?
Suspect IC402
Suspect Q203 Suspect Q204 Suspect X201
Check IC401
and IC404
NO
YES
Signal
present at
Q203?
Suspect XF201,
L215, L216
or L217
DONE
2
IC202 OK? Suspect IC202 Suspect IC408
Suspect IC405
YES
IC408
pin 7 goes
Low to High
adjusting
squelch?
Q204 OK?
Suspect IC202