Make sure that you solder those in the right direction and you haven't mix them.
İ check all again and change the 5401 with new one. And save thhe resistor but now - 9v at audio out
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Attachments
Measure voltage at 15v zeners.
Measure voltage across 0.47 Ohm.
Use a bulb in series with the transformer primary to save your amplifier .
ATTENTION when working with the main!
DANGER!
Use a combination of a cheap speaker in series with a 1000uf electrolytic capacitor as a load on the amplifier speaker output.
Play some music.
Measure voltage across 0.47 Ohm.
Use a bulb in series with the transformer primary to save your amplifier .
ATTENTION when working with the main!
DANGER!
Use a combination of a cheap speaker in series with a 1000uf electrolytic capacitor as a load on the amplifier speaker output.
Play some music.
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on zeners 15.4v
on 0,47ohm 0v
which kind a bulb do i need to use on it i have 10a fuse on board its not saving the amp?
not: when i give ac power, audio output have 0V. when i cut ac voltage then on audio out getting dc voltage and raise slowly to -9V i just see that luckly
i did that my friend no signal coming out. this will be second channel. first one working but this is i cannot find what is the problem.tomorrow i will make new pcb and new components i will post here what will happen.
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hi timos i did play music
) 3 channel b500 burned. r21 (100R). any one please help if you have time i need finish this amplifier killing me.
my 2 channels not work good but 1st one was working good but now 3 channel burn R21 100R same resistor.
and they burn 5200 transistors too
((((((
