Motorola CM Series User Manual

Chapter 3
TROUBLESHOOTING CHARTS
1.0 Controlhead CM140/CM340 Troubleshooting Chart
1.1 Control Head Failure
Back light
OK ?
Check 9.3V on
R808, R809
No
Control Head Check
Power-up
Alert Tone
OK ?
Check Speaker
Connection
No
Power-up
Red LED
Flash?
Check
D801, Q806, U801
No
Channel
Display
OK?
Check
DS801, U801, U802
No
Up/Down
P1 and P2
Alert Tone
Buttons OK?
Check R845, R846
R810, R811
No
EXT
PTT
OK ?
Check Q801, Q802
No
Communication Ok
Check Q803, Q812
Control Head is OK
YES
YES
YES
YES
YES
YES
No

Motorola CM Series Specifications

General

Brand	Motorola
Model	CM Series
Category	Radio
Language	English