Pt.II
No Fault!!!
Every component is OK, power BJT are OK!!
So I put new main chord and give power.
Both channel have some volts of offset in their output and the idle current is too low.
So, following the Service Manual I can set the correct value of bias and offset trimmers.
Next step is to change the DISC lamp
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| VR1-VR2: offset voltage setting trimmer |
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| Yamaha A-1 |
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