Motorola GM Series Service Information

3-2 TROUBLESHOOTING CHARTS
1.1 Troubleshooting Flow Chart for Receiver (Sheet 2 of 2)
IF Signal at
C3035?
No
RF Signal at
T3001?
RF Signal at
C3012?
No
RF Signal at
C3008?
No
RF Signal at
C3474?
No or
Check Harmonic Filter
J3401 and
Antenna Switch
D3471,D3472,L3472
Check filter between C3474
& C3008. Check tuning
voltage at R3019
Inject RF into J3401
Is tuning
voltage OK?
No
Ye s
Check RF amp
(Q3001) Stage
Check filter between
C3012 & T3001
Ye s
Check T3001, T3002,
D3031, R3030-R3034,
L3032, C3034 and C3035
Ye s
1st
LO level OK?
Locked?
Ye s
Check FGU
Ye s
Trace IF signal from
C3035 to Q3101.
Check for bad XTAL
filter
No
Ye s
IF signal at Q3102
collector?
Before replacing
U3101, check
U3101 voltages
Ye s
Check for 5VDC
Is 9V3 present?
Check Supply Voltage
circuitry. Check Q0681,
U3211 and U0641
No
No
No
Check U3501
Check varactor filter
No
Ye s
Ye s
Ye s
A
A
B
weak RF

Motorola GM Series Specifications

General

Brand	Motorola
Model	GM Series
Category	Radio
Language	English