Quote:
Originally Posted by lawrenceenglish
Hi I have got a circuit diagram .and all v are as listed good .I think that my problem if the Toshiba tmp 8355p as only 2 buttons on the front panel are working.the amp the speaker relay is working. The amplifier only works with the pre in with a good sound. I can only turn but no up or down volume .so if you no how to reset tmp chip it may set it right. I am going to buy another 5000 for the parts .but if I could get the tmp working. It would save me £40. The front panel and display only half work . I have tracked it back to the main computer chip .as I do not have a scope.thr trace ends there. Anyway I have gone on long enough. Can you be a bit more in detail about what you said .all the best to you Lawrence
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For the front panel buttons issue, have you checked the flexible lead between the panel and the main PCB? This is a very common problem and is nearly always caused by the flexible connection lead de-laminating due to it flexing over the years, which breaks the contacts between the front panel and the main board.
It can be replaced easily enough with a length of IDC ribbon cable.