Motorola GM140 Service Information - Page 23
Browse online or download pdf Service Information for Two-Way Radio Motorola GM140. Motorola GM140 32 pages. Gm series professional radio uhf (403-470mhz)
Also for Motorola GM140: Service Information (34 pages), Basic Service Manual (46 pages), Service Information (32 pages)
Print Page
Controlhead GM160/360/660 Troubleshooting Flow Chart
2.3
Display
Power Up Alert Tone is OK, volume knob does operate,
indicator/backlight is on but nothing on display
V5 (against 5V)
TP0973 between
-6V and -7V ?
NO
Activity on
Address & Data lines
A0 / D0..D7 / CS1
of U0971?
YES
Check / Replace
C0971 / C0973 / R0972
R0973 / R0974 / U0971
YES
Check LCD Assembly
NO
Check for shortage
U0831 / U0971
3-5