Toshiba RTS 933 right channel apparently dead
Posted 07 March 2012 - 03:00 PM
1) with the balance in the middle, only hear the left channel, and by increasing the volume begins to distort
2)when move to the right channel, the volume begins to decrease until they hear anything in both channels.this happens on all inputs, radio / tape / line and phono-
3)connecting headphones is exactly the same.
4)clean all switches without getting any results.
5)I checked things. tape recorded and played in another box and heard in sterero smoothly.
connect it to another box using the output of line out and listen to 2 channel smoothly, with the same signal without distortion apparent.
when using the external speaker output, the left channel works , the right output signal does not have any signal.
for now is the little test I could do.my knowledge of electronics are close to zero!any idea or suggestion is welcome to try to check
some pictures of the interior
Posted 07 March 2012 - 03:13 PM
Posted 07 March 2012 - 03:36 PM
Posted 07 March 2012 - 06:25 PM
Checking connections on your bad channel - could just be a loose joint on the speaker at either spk or board end.
Disconnect your 'bad' spk & connect your good one to the bad channel - just to prove its not the spk & the fault lies with that channel.
Check for visual damage to the speaker cone - rips creases etc...
Have a look on the Board for dry solder joints.
If your feeling really confident & with the unit switched on, get something non conductive & have a tap [gentle taps - no drum solos ] around the board especially the sound chip
Hope that helps.
Posted 07 March 2012 - 11:10 PM
Posted 08 March 2012 - 08:52 AM
looketh in more detail and I'll upload some photos.
Posted 09 March 2012 - 09:13 PM
Posted 11 March 2012 - 03:49 PM
this is the part of the amplifier (I think lol), Black and Red arrows indicates external speaker outs ,Blue(L) and yellou ® and the ellipses red and black ,are the chips.
that could be measured in this area?
more pictures, so you can see some more details