| Fender Champion 110, upc1188 - Click HERE for Original Thread |
| drummer_Dave |
Hello all,
So here's my dilemma, hope someone can help
I recently acquired a Fender Champion 110 guitar amp, that didn't turn on. After i tore it apart and couldn't see any burnt components i needed to isolate the power supply from the rest of the components so i removed all 5 op amps and put dip sockets in. now the only thing connected to the power supply was the upc1188 20watt power amp chip i powered the unit up and the transformer started buzzing (from what ive found this usually happens when you ground a tranny output) so i shut of the amp and found that one of the 1n4003 bridge diodes was conducting both ways, so i replaced it and the unit powered up fine. Great, or so i thought
I still dont get an output signal, i found a copy of a Fender champion 30 schematic ( http://www.manualnguide.com/dl/10166/ )which is almost the exact same (except for the power out chip which id a tda1514). so basically I am sort of at a point were i think i need a upc1188 chip (or the proper schematic). Does anyone know where i can get one or 2 of these chips? or i also have a second option. I could always build a kludge board (26v rails) with a lm3886 chip i have lying around and interface that with the existing circuit.
Any help in sourcing parts or schematic would be greatly appreciated.
Dave |
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| drummer_Dave |
well after i reverse engineered the power amp section and figured out what was wrong I ended up finding s an electrolytic cap in the signal path was dried up. Who uses electrolytic in audio signal path??? urg) i then found the schematic of the whole amp tucked inside the amp. so if anyone need the schematic email me and i will scan and email it.
Dave |
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| Nigel Goodwin |
| quote: | Originally posted by drummer_Dave
Who uses electrolytic in audio signal path??? urg) |
Almost every solid state amplifier ever made? :D |
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| Geek |
Hi Dave,
| quote: | Originally posted by drummer_Dave
...an electrolytic cap in the signal path was dried up. Who uses electrolytic in audio signal path???... |
Sounds to me like you need to join the tube amp crowd ;)
Cheers! |
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| drummer_Dave |
I agree geek, once i finish off my digital matrix mixer i plan to do a nice 15 - 20 watt tube amp (never dealt with tubes before so im sure there will be a lot of searching in this site) fortunately a guy i work with (who is 70+) has a whole pile of tubes and transformers i can have, i just have to sort through them, but thats a whole nother thing for another day
Dave |
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| head_spaz |
| quote: | | Does anyone know where i can get one or 2 of these chips? |
I see that you've already fixed your amp, but if you still want to pickup
a few spare ICs, tubesandmore.com stocks them.
Look under the Solid-State-Devices / ICs / Fender category.
IC - ORIGINAL FENDER, POWER AMP PC1188H
Part Number = P-QPC1188H
2007 Catalog / page 68
Price USD = $10.25 |
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| drummer_Dave |
thanks for the heads up head_spaz
Dave |
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| Kenda47 |
Hi Dave
It looks like you solved your problem. I have been asked to see if I can repair my friend's son's Champion 110 but the amp is pretty fried in the output stage area and with no schematic I am struggling to know what the components should be.
You mentioned that you can e-mail a schematic for the Champion 110. If you still have one I would be very grateful.
Thanks for your help.
Cheers
Keith |
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| drummer_Dave |
yep i got the schematic at home, Ill try to scan it and email it within the next day or so if you can be patient...
Dave |
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| Kenda47 |
Cheers Dave that would be great. Thanks alot. I notice you are thinking opf buildiong a valve amp. This is my forte so if I can help let me know.
Keith |
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| gypsypunk |
hi
please could you help me i have been meaning to get my little champion 110 amp fixed up as i have had it so long with a broken input jack and the drive has kaput
any chance of a copy of the schematics
i would really appreciated it
victorjones@hotmail.co.uk |
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| drummer_Dave |
sorry for the delay all, scanner was down. pm me with your email so i can attach the file and send it to you.
Dave |
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| drummer_Dave |
gypsypunk i tried sending the file to you at
victorjones@hotmail.co.uk but i got a delivery failure, any other email's i can try?
Dave |
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| kingmattress |
| Dave, I am also working on a Champion 110. Pretty nice little amp. I would really appreciate it if you would send the schematic my way. I may have damaged a pot trying to put a knob on. The flat on these pots are opposite the other amps I have like this. The pots are also not attached to the face plate, just the board. I also need to order a new jack and I need the part number. Thanks! |
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| drummer_Dave |
Pm me so i can get your email, once i get that i can send it on to you :)
Dave |
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