Motorola CDM Series - Troubleshooting Charts; 1.0 Control Head CDM750; PRO3100 Troubleshooting Flow Charts

Section 2: 3-1
6881091C63-F
Chapter 3
TROUBLESHOOTING CHARTS
1.0 Control Head CDM750 / PRO3100 Troubleshooting Flow Charts
1.1 Troubleshooting Flow Chart for On/Off
Radio does not turn on when On/Off/Volume Knob is
pressed
NO
YES
YES
NO
R0823 Pin TAB
= 5V?
R0823 Pin TAB1
when pressed
= 5V?
Check / Replace
Volume Pot R0823
Check / Replace
R0822 / VR0822 /
D0822 / C0822
NO
YES
J0801 Pin 2
> 10V?
Check / Replace
Q0821
Check / Replace
Q0822 / R0821
YES
NO
J0801 Pin 2
=5V?
Check / Replace
D0821 / R0852
Press and hold
On/Off/Volume Knob