Yamaha R-V702 R-V502 User Manual Page 32

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SAMSUNG Proprietary-Contents may change without notice
This Document can not be used without Samsung's authorization
SGH-E630 Flow Chart of Troubleshooting
7-10
6. Speaker Part(Melody)
U409 pin 5 = 2.85V?
Speaker does not work
Check the Clock signal at
Pin 1 of U402 (26MHz)
Check the clock generation circuit
(related to U101 and U402)
END
No
Yes
No
Resolder or replace U409
U402 pin 17,18 1.8V?
(When U402 operate)
Resolder U402
Yes
No
CN606 pin 23,25
1.8V?
Check the circuit related to
"SPK_P/SPK_N" signal
Yes
No
Is Speaker working?
No
Yes
Change the Speaker
Yes
Yes
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