![background image](http://html.mh-extra.com/html/samsung/sgh-x490/sgh-x490_service-manual_1191261041.webp)
SAMSUNG Proprietary-Contents may change without notice
Flow Chart of Troubleshooting
This Document can not be used without Samsung's authorization
7-
17
7-8. Receiver Part
U402 pin 3, 15 = 1.5V?
Resolder or replace U402
END
No
Yes
Yes
Receiver does not work
SPK +,- PAD
= 1.5V?
Change LCD module
No
Yes
Is Receiver working?
Replace the Receiver
No
Yes
No
Resolder or replace
U402
Yes
No
Resolder EAR400
EAR400 pin 5, 2 = short?
Yes
HEA1 pin 24, 26 = 1.5V?
No
Resolder HEA1
Yes
Check the soldering of the
speaker wire
No
Modify the speaker wire soldering
Yes
U402 pin 8, 12 = 1.5?