SAMSUNG SGH-A300
Instrukcja Serwisowa

Flow Chart of Troubleshooting and Circuit Diagram

5-7 SGH-A300 Key Data Input
Check initial operation Y Check the connection between CN602 and Keypad. Y Check the pin 1, 3, 4, of CN602 is �High� Y

N

Check the M46(U201)

When one of the keys is pushed, one of pin [5:12] of CN602 is �High�

N

Replace the key PCB

Y END

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