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5-5
Troubleshooting
LCD module is connected
properly to the LCD connector
on the PCB?
LCD connector is
well soldered to
the PCB?
The LCD driver
source voltage is 3.0V
(U700 pin 5)?
YES
LCD display is not working.
Replace LCD module.
Reassemble LCD module
with LCD connector.
NO
Re-solder the LCD connector.
NO
YES
END
YES
NO
Replace U700.
5.5 LCD Trouble
Содержание BD20
Страница 1: ...GSM PHONE SERVICE MANUAL MODEL BD20 1st version 2004 01 27 ...
Страница 2: ...Rev 1 00 ...
Страница 36: ...6 PCB Diagram 6 1 Main PCB 6 1 Top View ...
Страница 37: ...6 2 PCB Diagram Bottom View ...
Страница 46: ...9 Block Diagram 9 1 BB Block Diagram 9 1 ...
Страница 48: ...Block Diagram 9 3 Power Supply Block Diagram 9 3 ...
Страница 49: ...10 Schematic Diagram 10 1 Key Pad 10 1 ...
Страница 50: ...10 2 Schematic Diagram 10 2 Main Board 10 2 1 Chipset ...
Страница 51: ...10 3 Schematic Diagram 10 2 2 Memory Melody ...
Страница 53: ...10 5 Schematic Diagram 10 2 4 Connector ...
Страница 54: ...10 6 Schematic Diagram 10 3 RF Top Schematic 10 3 1 RF Pam ...
Страница 55: ...10 7 Schematic Diagram 10 3 2 RF Main IC ...