So I've got a request to pretty please repair this PA. Well... I plugged the unit in pressed power button and nothing. It just played dead, no display or anything. Gave it a good whack and low and behold it powered up and worked good for the time being. Turned the unit off, the display went off, but the PA itself stayed on, same as the switched 120V receptacles in the back. Gave it another whack and it turned off as it supposed to. Umm... I guess it likes to be spanked a lot? Unplugged the unit for a minute and same thing: wash, rinse repeat.
The repair:
The first problem not wanting to turn on, was on the CPU Board. Bad C329 6.3V 2200uF cap (replaced it with Rubycon YXG same ratings, the old one had mechanical issues) and a bunch of bad solder joints around the area of IC 309 and D315, "THE brown gue" on a jumper cable on the back, and for some reason I had to take out D315 clean it and reinstall it. Probably the brown gue's fault.
The later problem with not turning off the PA and the receptacles (but the display turns on an off no problem)is a faulty relay RY701 (VS14MB) on the BackUp PSU board. That relay keeps getting stuck. I replaced it with an Omron G2RL-1A-E relay.
So far so good! Dang! This thing has some very nice audio guys! 160WPC keeps the house rockin all right!
The repair:
The first problem not wanting to turn on, was on the CPU Board. Bad C329 6.3V 2200uF cap (replaced it with Rubycon YXG same ratings, the old one had mechanical issues) and a bunch of bad solder joints around the area of IC 309 and D315, "THE brown gue" on a jumper cable on the back, and for some reason I had to take out D315 clean it and reinstall it. Probably the brown gue's fault.
The later problem with not turning off the PA and the receptacles (but the display turns on an off no problem)is a faulty relay RY701 (VS14MB) on the BackUp PSU board. That relay keeps getting stuck. I replaced it with an Omron G2RL-1A-E relay.
So far so good! Dang! This thing has some very nice audio guys! 160WPC keeps the house rockin all right!
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