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Old 25th January 2014, 12:59 AM   #1
diyAudio Member
Join Date: Oct 2012
Default Problem with AMPEG amp

Something strange happens to this AMPEG ba115hpt, you can find its schematic here: AMPEG BA115HPT Service Manual free download, schematics, eeprom, repair info for electronics

I connect a CD to the CD INPUT and a little crack sound like some component breaking and now you can hardly hear the sound. I am getting signal in the MOS gates but the output is nearly quiet with the level at max.

I already change the NE5532 (U3) with no improvements. I wonder how nearly 2V sinusoidal is reaching MOS gates and getting no amplification. Any suggestion are appreciated.
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