Posted 14 January 2017 - 02:25 PM
I have had an issue with the sound on this unit being that the sound is okay through the radio and the dubbing selection but selecting the cd line in and tape the sound is so quite. I need to push the volume to the max to even get a hint of sound out of it.Today I've used contact cleaner on the selection switch and the record bar switch but the problem remains. Any one got any other ideas on what I can try thanks
Posted 14 January 2017 - 09:15 PM
Posted 16 January 2017 - 07:22 AM
Posted 16 January 2017 - 08:42 AM
I would try to temporarily bridge the the selection switch in order to find out if it is an issue with it.
Btw. the service manual of the TRK-3D80 is very similar and available for free. The circuit boards are almost the same.
I am currently working on the same machine. In my case the 3D-System is not doing to much. The LED switches on once the button is pressed, but there is nearly no difference in sound (bass expected).
I guess I have to change one ore more capacitors on the amplifier circuit board. Everything else is working well.
Posted 16 January 2017 - 11:02 AM
Posted 18 January 2017 - 08:28 AM
I would give it a try and use a multi-meter in order to find out which soldering points are bridged. Usually each of the two rows points work separated from each other. No connection between them. As there are no other moving parts in the way of the music-signal in the case you described I would suspect that the switch is faulty.
Posted 19 January 2017 - 08:30 AM