![background image](http://html.mh-extra.com/html/samsung/sgh-e740s/sgh-e740s_service-manual_1190620051.webp)
SAMSUNG Proprietary-Contents may change without notice
Flow Chart of Troubleshooting
This Document can not be used without Samsung's authorization
9-15
9-7. Key Data Input
When one of the keys is
pushed,
Isn't it displayed on LCD?
Check the Dome sheet & Key Pad
END
No
Yes
Yes
Check Initial Operation
When one of the keys is
pushed,
KEY_ROW(0,4),
KEY_COL(0,4)
signal is OK?
Replace the PBA
No
Yes
Summary of Contents for SGH-E740S
Page 35: ...8 PCB Diagrams 8 1 Top ...
Page 36: ...PCB Diagrams 8 2 Bottom ...