NEC TV, no sound

[Dave Walch]

I have an NEC television with a sound problem. The model number is
CT-2606A. The date code is Jan 88. The serial number is 83012026.

The problem is the sound is intermittent; mostly off. The television
has audio input jacks (it's stereo) and when audio is presented there,
such as with a VCR, and the TV is used as a monitor, the sound is fine.

This implies to me the audio amplifiers and speakers are OK, and the
problem must lie before these blocks. I haven't found any bad traces
in the system board, and when I get the back off of the unit to try
to track down the bad component, the problem decides to go away until
I put the back on again.

My brother-in-law has the same problem with a similar model NEC TV.

Are there known issues with these TVs? Does anyone have ideas for
a better debugging method than poke-and-hope?

Thanks in advance,

Dave Walch (wa...@uicc.com)
--
David A. Walch (wa...@uicc.com) | "You know, your nose looks
Unitrode Integrated Circuits | just like Danny Thomas's!"
7 Continental Blvd. | -Ronald Reagan to the
Merrimack, NH 03054 | Lebanese Foreign Minister

[Dave Walch]