Analog Part Troubleshooting - Samsung PS43E450A1WXZG Service Manual

CAUTION
Make sure to disconnect the power before working on the IP board.

4.1.3. Analog Part Troubleshooting

1) It is easy to check analog video signal than digital video signal.
2) Use reference signal input. (ex. 16 Gray)
3) Check Signal Level and sync.
4) Check Signal path until input of Video Decoder.
• Tuner → Switch → Video Decoder
• AV Connector → Switch → Video Decoder
• Scart → Switch → Video Decoder
Is the ca ble conne ction be twe e n
Main boa rd a nd the s pe a ke r
prope rly conne cte d?
Ye s
Is th e output volta ge of S MP S norma l?
(CN801 P IN 7 : 15V)
Ye s
(1)
Is the s pe a ke r output te rmina l of
the Ma in boa rd norma l?
Ye s
Re place the S pe a ke r.
No Conne ct the ca ble prope rly or
re place the ca ble, if ne ce s s a ry.
No
Re place the S MP S .
No
Re place the Main boa rd.
So und Output S ha pe
(1)
4. Troubleshooting