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4 LCD Connector (J503)
4.1 Affected Units
Type:
Affected IMEIs / Date Codes:
Affected SW-Versions:
4.2 Fault Description
Fault Symptoms for customers:
No screen or wrong display.
Fault Symptom on GSM-Tester:
None
Component Information
The LCD Cable Connector is a 30-pins contact type socket.
through this connector.
1. LCD signal:
A2, D0~D15, WR, REST, VDD 2.8V,VDDL 2.5V are used to transmitted the address signal, data
signal, control signal and power signal of LCD.
2. Backlight LED signal:
There is 11V power supplied to the anode of backlight LED via D303. LCDlight - connects the
cathode of backlight LED and the resister that can limit the current passing through the LED.
V 1.1
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Copyright 2003© Siemens AG
s Com
ST55
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There are 2 type signals transmitted
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COM MD CC GRM T
01/05
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