Samsung YP-R1 Service Manual page 21

Troubleshooting
4-1-2 If there is no sound
If there is no sound
Is audio signal present?
Yes
1
Is R711 high?
Yes
 See the waveform and
Replace the board.
(Detailed inspection is
required.)
4-6
No
No
the image in Fig. 4-4.
Does U701 work?
Yes
Does U301 work?
Yes
No
Replace U701.
Replace the board.
(Detailed inspection is
required.)
No
Replace U301.
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