Motorola GM1280 Informacje o usłudze - Strona 28

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1. Gm140/Gm340/Gm640 Models
2. Gm160/Gm360/Gm660 Models
3. Power Supplies
4. Controlhead Model for Gm140, Gm340 and Gm640
5. Allocation of Schematics and Circuit Boards

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

Activity on

Check for shortage

Address & Data lines

A0 / D0...D7 / CS1

U0871

of U0971

YES

Check / Replace

Flex connection

Resistors on Address & Data

lines and LCD Module