Do you happen to know the value of R84? I noticed it was burnt also
1 other question also do you know what transistors commonly fail on this board ?
There are 4 outputs in this amp 2 of the outputs get hot fast the outputs that are heating up are the outputs with their 3rd leg connected to the inductor .
1 other question also do you know what transistors commonly fail on this board ?
There are 4 outputs in this amp 2 of the outputs get hot fast the outputs that are heating up are the outputs with their 3rd leg connected to the inductor .
R84 = 560 ohms.
If the 560 ohm resistor burned, it's not a common failure. You'll have to check every component.
Those outputs are the high-side outputs. Their drivers are the four transistors nearest to the op-amp.
If the 560 ohm resistor burned, it's not a common failure. You'll have to check every component.
Those outputs are the high-side outputs. Their drivers are the four transistors nearest to the op-amp.
Found the problem ..
Someone tried to repair this before ..
They had MPSA42'S in Q42,43,44 they should be MPSA92'S
Someone tried to repair this before ..
They had MPSA42'S in Q42,43,44 they should be MPSA92'S
Hi, anyone have schematic for this driver board?
i've tried to reverse enginering, but i've failed.
my email joetvanelliclub@gmail.com
thanks to all
i've tried to reverse enginering, but i've failed.
my email joetvanelliclub@gmail.com
thanks to all
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