AMP REPAIR



One of Christina's neighbors at the apartment complex was selling some practice amps.  She bought me two of them for me for only $35 - a (See pic 1) and a Peavey Rage 158.  The seller also threw in a microphone.



Pic 1 - Marshall MKII


Unfortunately, she couldn't test them but he said they worked.  Well the Peavey 158 worked great but the Marshall amp had almost no volume.  After a little troubleshooting I figured that the amplifier chip was dead so it was replaced.  See pic 2.  A replacement chip was only $2.32 plus shipping.



Pic 2 - Installed new dead amplifier chip


But that didn't solve the problem. The power supply circuit was tested next and it was all OK. The amp was taken apart further and a broken volume control potentiometer was discovered. See pics 3 and 4.



Pic 3 - Empty Front Panel


Pic 4 - Broken Volume Control Pot and replacement

Dug up an old pot in my electronics tool box and confirmed the potentiometer was the problem. See pics 5 and 6. A replacement cost only $1.50 plus shipping. Spent more money on shipping than parts. Oh well. The new part has white letters in pic 7.



Pic 5 - Test potentiometer


Pic 6 - Test Setup new pot


Pic 7 - New potentiometer installed

The amp is working great and I really like the tones you can get out of this small amp.



Three of my amplifiers (also have 2 more amps but they are really cheap)



My cheap guitars - No guitar cost over $115!


Stairway to Heaven - Look Out!


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