Motorola CM360 Service Information

Troubleshooting Flow Chart for 25W Transmitter (Sheet 1 of 3) 3-5
2.1 Troubleshooting Flow Chart for 25W Transmitter (Sheet 2 of 3)
Yes
<2V
Check Q102, R139,
R155, R166, R126,
R127, R169, R138,
R175, R147
Check PA
Stages
No or too low power when keyed
DC
Voltage
at Q101 & Q102
base=0?
DC
Voltage
at U103
Pin 8
Check U403
Check resistive network at
Pin 9 and 10 of U103
before replacing U101
Pin 1
DC Voltage
at U102
Check resistive network at
pin 1, 2, 3 of U102 before
replacing Q105
Check Final PA Stages
U102 Pin 3 =
8.8V
Check U102 before re-
placing Q105
DC
Voltage at
U103 Pin
10=8.8V
Check Q101,
R153,R136, R165,
R122, R168, R137
Check U103 and resistive
network at Pin 10 of U103
before replacing U101
No
No
Yes
>5V
2-5V
2-3V
Yes
No
<2V
>3V

Motorola CM360 Specifications

General

Brand	Motorola
Model	CM360
Category	Radio
Language	English