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Well, Last night just experimenting I probably did something really dumb. I unplugged the module to the right and powered it up and nothing, no change, ...
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I replaced the TDA chips as well as this amp just kept blowing fuses.
No longer blows the fuse but has a LOUD humm / buzz thru the speakers when switched...
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AVT 150H Replacement Parts
I need to replace the output jacks on a Marshall Valvestate 2000 AVT 150H
Does anyone know what part number / from where?
Thanks in advance...
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Mackie 1604 VLZ Pro issues
This is an older mixer and hopefully there is someone here that has had a similar issue.
Channel 4 is pretty much dead, several of the others are weak...
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can someone give me a price quote on the following?
1 007-0144-000 GP PCB ASSY POWER AMPLIFIER ( STUFFED )
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What should I expect to pay to get this thing fixed if I drop it
off at a repair shop?
It will need at least a couple of xstrs and probably...
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Yeah, I am starting to really dislike this unit.
I will order a power amp board complete and go from there.
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Okay,
I ended up on the bias adjustment pot and found that it was set basically to 0 ohms or very very close on the left chanell and closer to 9 ohms...
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I will work thru the bias circut tonight.
Hopefully I will find it there.
All the Xstrs are insulated to the heat sink via what looks like...
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Ok. Here goes. Q211 is fine, R219 is fine @ 100 ohms R220, R221, R223, R224 at .2 ohms. Q214 and Q216 are fine Z202 is fine.
You were right. It only...
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Well, I cant find it and I know its mostly die to my lack of experience.
I have two separate power amp boards. One will take out one set of xstrs (Q212...
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Fantastic answers Dr. "E"
I'll go back through this beast a bit more carefully.
I am still in the learning stages of repairing this...
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Man they sure are a pain!
The first time, I swapped used ones from another board
(trasistors checked OK) The 2nd time, I bought ALL new ones...
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Fender PA problem. Passpoprt 250
I have a Fender Passport 250 that let the smoke out of a couple of the
transistors on the power amp board and went into protect mode.
I replaced...
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Amps with different input voltage rating questions
Okay I have access to a Fender Cyber Twin Head but its rated
100V~ 50/60Hz, 360W
Question is, what would need to be done to use it here in North...
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That schematic is for the Fender Rumble Bass (not the Rumble 100)
The Rumble Bass is a tube amp and these are SS.
I have not tried patching...
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Fender Rumble 100 Schematic req
Cant find the Rumble 15,25,60,100 schematics anywhere (Not Rumble Bass) it's a different amp
Anyone have one?
ThanksLast edited by Showey; 02-28-2009, 03:57 PM.
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Fender SS amp no sound
Hey guy's I need some help here. I just received several Fender Rumble 100 bass amps. All are in different states of disarray. I can do all of the physical...Last edited by Showey; 02-28-2009, 02:36 PM.
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The official word from EMG:
"-9vdc will not hurt an EMG active pup. -18vdc will in fact fry it. He’ll have to replace the pup."...
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18v will not damage an EMG (they are rated to 27v)
Something else is wrong.
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