Motorola GM660 Service Information - Page 28

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Motorola GM660 Service Information
3-10
TROUBLESHOOTING CHARTS
3.4

Display

Power Up Alert Tone is audible, volume knob does operate,
indicator/backlight is on but nothing is seen on the display.
TP0973
Voltage Sense
Check / Replace
between
YES
LCD Module
2V and 2.4V
?
NO
Activity on
Check for shortage
Address & Data lines
NO
A0 / D0...D7 / CS1
U0871
of U0971
?
YES
Check / Replace
Flex connection
Resistors on Address & Data
lines and LCD Module