bias circuit of Kenwood KX-1030

Discussion in 'Electronics Repair' started by mikefc55, Jan 8, 2017.

  1. mikefc55

    mikefc55

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    hello all

    I'm just finishing the resurrection of this beautiful cassette deck. the only remaining problem is that the bias adjustment circuit is not working. It records fine and the dolby circuit works as well. A feature of this deck is to imprint two frequencies to adjust bias. a 400Hz and a 10kHz. I'll be damned if I can find the oscillator on the schematics, in my deck only the 400Hz is turning on. There is NO 10kHz signal and no effect on the level of the 400Hz when adjusting the bias knob. I'm looking for a crystal oscillator, am I wrong? From there I could trace the circuit and find the problem.
     

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    mikefc55, Jan 8, 2017
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