Motorola Radius CM300 User Manual

3-2 TROUBLESHOOTING CHARTS
1.2 Button/Tones Select Error (Page 1 of 2)
No
Check Voltage Levels on
TP401 (Keypad Col)
and TP402 (Keypad Row)
(see table on next page)
Right
Voltage
Up Key
No
Check R846, R811
on Control Head
Right
Voltage
on Down Key
?
Check Control Head
connectivity continuity
and R429, R430, D401
(main board)
Connect DTMF Mic
to TELCO Connector
YES
Button/Tones Check
Check R845, R810
on Control Head
Right
Voltage
on P1/P2
Keys ?
Is there
0.75 Vdc on
MIC_SENSE
R429, on radio
Check R813, R814
on Control Head
?
A
YES
No
YES
No

Motorola Radius CM300 Specifications

General

Brand	Motorola
Model	Radius CM300
Category	Radio
Language	English