Hello everyone,
I came across this amp and I powered it up and it pulls too much current so that my power supply goes into protection (it has 14A max current).
Tried to put resistor in series of +12 and that prevented it from shutting down, but the BUZ102 (6 FETs) get so hot.
Turned off right away, pulled the FETs checked them e they seem fine.
Checked thegate voltage on the board and it's about 4v.
What should I check next?
Can someone help me please?
Is this a known defect?
Thanks for your help.
I came across this amp and I powered it up and it pulls too much current so that my power supply goes into protection (it has 14A max current).
Tried to put resistor in series of +12 and that prevented it from shutting down, but the BUZ102 (6 FETs) get so hot.
Turned off right away, pulled the FETs checked them e they seem fine.
Checked thegate voltage on the board and it's about 4v.
What should I check next?
Can someone help me please?
Is this a known defect?
Thanks for your help.
Check the output transistors.
If has bias pots, someone may have mis-adjusted the bias.
If you can't find the fault, power it up for a few seconds with it out of the heatsink to see which of the transistors get hot.
If has bias pots, someone may have mis-adjusted the bias.
If you can't find the fault, power it up for a few seconds with it out of the heatsink to see which of the transistors get hot.
I know it's ridiculously old but the only thing that got hot were the SIPMOS BUZ102 q17 to q22.
I left it powerded on for too long and now nothing heats up.
q17-q22 still reads
G .7v
D 12v
S 0v
please help,
I left it powerded on for too long and now nothing heats up.
q17-q22 still reads
G .7v
D 12v
S 0v
please help,
It's possible that there is an intermittent short in the transformer. Insert a 10 amp fuse in the B+ line and twist/push/pull on the transformer to see if the fuse blows.
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