hifi engine

morantz 4300

hi i am looking service manu for 4300 stereo amplifier this unit amp section work good but when preamp
connect unit make crakel noise



Re: morantz 4300

Are you certain it's not the preamp that is the source of the crackiling?

Re: morantz 4300

hi thanks
for email amplifier section is clear i used pre to test ,crackel are coming form morantaz 4300 pre any idea
please let me know

Re: morantz 4300

I have seen problems with the transistors in the tone amplifier circuits. Also, I have seen corrosion on the leads of the transistors; to solve this you need to remove them from the circuit, scrape off the corrosion, then resolder them.