So I had to replace a bad Dfac2 chip on my color classic board to get any audio. When I plug a speaker or headphone set into the audio out I am expecting to get stereo audio out and the internal speaker to cut out.. But the internal speaker keeps playing audio and the audio out only plays audio via the left channel (left earphone).
Is this normal behavior?
According to the Apple Service Source manual for the Color Classic, it has monophonic audio only.
This is in contrast to the SE/30 which has stereo sound from the ASC (Apple Sound Chip).
I would expect that the audio out jack is of the TS type (tip, shield) rather than the stereo TRS type. You can look inside the jack or count the pins that attach it to the board.
Thats some comfort however what about the internal speaker not cutting out when a speaker cable is connected to audio out and they both play audio?
To detect when a plug is inserted into an audio jack, the usual way is to use "normaled" connections, but it is possible to do it differently. I would try to use a TS (mono) plug, it might only be able to detect that kind.
I will try with a mono plug and see what happens
Thats a negative. I think the next step is to replace the audio jack. But before I go to that length. Can someone with a Macintosh Color classic please test a pair of head phones on the audio out jack in back and see if they get audio for one, and if the internal speaker still plays audio or cuts out? Thanks
Edit: When I use the same headphones on the audio jack of my LC575 (arent they from the same era?) it works fine and in stereo and the internal speaker cuts out.
replaced the jack, no change whatsoever. I am at a loss. Its not the audio jack
And when the headphone jack is inserted the continuity on the jack changes to this:
I sourced a new 343S0129 chip and it fixed my Color classic. Just wanted to update the thread.