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5.3 LCD Trouble
LCD display is not working.
Normal state
contact of LCD module with
LCD connector on
PCB.
The LCD driver
source voltage is 3V
(J302:PIN14).
END
LCD connector is
well soldered on the
PCB.
Reassemble LCD module
with LCD connector.
Re-solder the LCD connector.
Check the U502
NO
YES
YES
YES
NO
NO
Replace LCD module.
Check whether the
data signal and /CS is out from
the U501
YES
Check the U501
Содержание VG207
Страница 1: ...GSM PHONE SERVICE MANUAL MODEL VG207 ...
Страница 2: ...ISSUED DATE 2003 08 23 Rev 1 0 ...
Страница 13: ...3 4 Exploded View and Parts List 3 4 1 Exploded View 25 ...
Страница 40: ...Memo ...
Страница 42: ...6 Block Diagram 6 1 BB Block Diagram 6 1 ...
Страница 43: ...6 2 Block Diagram 6 2 RF Block Diagram ...
Страница 44: ...7 Schematic 7 1 RF PAM Block 7 1 ...
Страница 45: ...7 2 Schematic Diagram 7 2 RF Main Block ...
Страница 46: ...7 3 Schematic Diagram 7 3 Flash Audio Block ...
Страница 47: ...7 4 Schematic Diagram 7 4 Peripheral Block ...
Страница 48: ...7 5 Schematic Diagram 7 5 Base Band Block ...
Страница 49: ...7 6 Schematic Diagram 7 6 Folder Block ...
Страница 50: ...7 7 Schematic Diagram 7 7 Key Pad Block ...
Страница 51: ...7 8 Schematic Diagram 7 8 Battery Charger Block ...
Страница 52: ...8 PCB Diagram 8 1 Main PCB 8 1 TOP ViIEW COMP ...
Страница 53: ...8 2 PCB Diagram BOTTOM VIEW COMP ...
Страница 54: ...8 3 PCB Diagram 8 2 Folder PCB TOP VIEW COMP ...
Страница 55: ...8 4 PCB Diagram BOTTOM VIEW COMP ...
Страница 56: ...8 5 PCB Diagram 8 3 Key Pad PCB TOP VIEW COMP ...
Страница 57: ...8 6 PCB Diagram BOTTOM VIEW COMP ...
Страница 58: ...8 7 PCB Diagram 8 4 Battery Charger PCB TOP VIEW COMP ...
Страница 59: ...8 8 PCB Diagram BOTTOM VIEW COMP ...
Страница 70: ...Memo ...