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13 Keypad Connector (JP402)
13.1 Affected Units
Type:
Affected IMEIs / Date Codes:
Affected SW-Versions:
13.2 Fault Description
Fault Symptoms for customers:
Can't power on/off.
No response while pressing keys under normal operation.
Fault Symptom on GSM-Tester:
None
Component Information
The keypad connector is a 12-pins contact type socket. There are 2 type signals transmitted
through this connector.
1. Key signal:
ROW0~ROW2, COL0~COL4, and PWR are used to transmitted the ROW signal, COLUMN
signal, and POWER ON signal of key.
2. Keypad backlight signal:
There are 8 pieces LED used in the keypad FPC. The power is supplied to the LED via VBAT
(PIN-12). The signal coming from DBP to LED (PIN-11) will control the ON/OFF of LED.
See drawing below.
V 1.1
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