7-8. Receiver Part
Receiver does not work
U402 pin 3, 15 = 1.5V?
U402 pin 8, 12 = 1.5?
EAR400 pin 5, 2 = short?
HEA1 pin 24, 26 = 1.5V?
SPK +,- PAD = 1.5V?
Check the soldering of the
speaker wire
Is Receiver working?
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
END
SAMSUNG Proprietary-Contents may change without notice
This Document can not be used without Samsung's authorization
No
Resolder or replace U402
No
Resolder or replace U402
No
Resolder EAR400
No
Resolder HEA1
No
Change LCD module
No
Modify the speaker wire soldering
No
Replace the Receiver
7-17
Flow Chart of Troubleshooting