Hi,
It has been a few years that my Music Man has been sitting and Mike answered some questions on the old board. Anyway i need new caps installed and I would like to change the input voltage from 110V to 220V as I now live in Thailand.
Is the input transformer the one in middle? (Pictures attached). The one in the middle has the numbers EIA 606-025. I take it is a Woodward Schumacher transformer. If this is the one I need to know if it can be wired for 220V?
Next thing when i removed the chassis there was a snag with two rca plugs on the bottom that i unplugged. Now when i put the chassis back there is no indication of where the red or black rca plug goes back into?
I am still trying to find someone here in Thailand to replace the capacitors for me but not getting anywhere yet.
Someone on the old board was kind enough to give me a list of caps i need to replace and they were:
4-150uF@50v Not sure which caps these are all in the components.
1-100uF@100v
1-50@50v
2-100uF@450v Are these last 4 on the bottom under the cover?
2-20uF@450v
Does anyone sell a kit of the above parts or just find them on ebay or what is the best way to get them?
Thanks for any input on this.
William
210 - 130W cap replacement and input voltage change has been upd
Can only add 5 pics so here i need to add more.
Rewiring is probably not possible
Hi William,
if your amp has a standard US issue transformer in it, you cannot rewire for 220V. You need to replace the power transformer. If you are lucky enough to find a true EX type transformer for the early style 130W version you may drop it in and it should work. If you are not able to find this piece (it is relatively rare) you need to get a new replacement used in the later style with the transistor driver. In turn this means rewiring the power selector and standby switches and adding two resistors. This operation is described thoroughly in the Music Man service bulletins.
As for the reverb RCA jacks: The red one goes in the jack closest to the front of the amp.
If you are not able to identify the transformers or the capacitors in the amp I respectfully suggest that you find a qualified technician or leave the amp as is and use a step down transformer.
Cheers,
Lars Verholt
210 - 130W cap replacement and input voltage change
Hello Lars,
Thanks for the reply. Is the list of caps I mentioned correct and where can I buy these parts? Are there different types and will i be able to get the correct ones with just the description in the list? Also which ones do i need to replace in the picture? Is it correct that the 2-100uF@450v & the 2-20uF@450v caps are underneath the cover on the underside?
Thanks,
William
Finding replacement capacitors
Good news I found a shop to replace my capacitors here in Thailand but they want me to get the parts for them.
I ordered all the parts locally here through RS components. Does anyone have a picture of the all the caps marked in the place on the boards?
Thanks,
William
If you are going to replace..
You might as well replace all the electrolytic ones.
2 x 100uF @450V, 2 x 20uF @450V, 5 x 150uF @50V, would also replace the 150K @2W bleeder resistors.
Cheers,
Lars Verholt
If you are going to replace..
Thanks.... how many of the 150K @2W bleeder resistors are there?
Is there a picture anywhere with the caps marked which ones they are? Would be nice to have that. Essentially i will be bringing all the parts and the amp to the tech to replace them.
Thanks,
William
Tech
If your "Tech" isn't smart enough to know which end is which, you need to find another guy. Not trying to be mean here but if you're asking help to do it yourself and you don't have the expertise, just say so. We'll help. The info is out there if he's willing to look but if you NEED help to do it yourself, say so. Mike.
Hey Mike,
Hey Mike,
Here is the skinny. Like I said after all these years I could only find one guy that will repair the amp in Thailand. He is recommended by Fender. I talked to him and he said I will need to supply all the parts. I called him again and asked about resistors and he said nope you have to buy them too. Hmm... no resistors? Okay so I ordered all the caps and resistors I have found on the black board which a friend in the states recommended to replace after seeing the pics i sent him. I ordered all the caps with the list you provided me before. Now Lars said there is 5 of the 150uF@50v caps and you said 4 before. So that is why i am asking if there is a picture with the caps marked out so I make sure i get them all. Lars also mentioned to replace the "150K @2W bleeder resistor" is there only one? I ordered a bag of 10.
Now I don't know what i am getting into. When I get all the parts (2 are on back order) I will take them down to the place in Bangkok (3 hours from here) and see what this guy has to say. He will not say how much for one thing. If it is too ridiculous I will have to attempt the job myself or save up some money and fly my friend out from Alabama if he is willing to fix it.
Thanks,
William
MY 130 chassis only HAS 4.
MY 130 chassis only HAS 4. There IS that 100@100 on the driver board though. See attached pic
That's the one
The 5th 150uF cap is the bias filter cap. Its value is not that critical. Either your amp came with 100uF in this spot or it was replaced at some point. There are two bleeder resistors. Typo on my part.
Cheers
Lars Verholt
Thanks for the replies Mike &
Thanks for the replies Mike & Lars. I have received all the parts so far except 3 caps on backorder. Should be another 30 days before I get them. Will post back after i get them and bring them to the repair guy in Bangkok.
Thanks,
William
need clarification one two caps please
Hello Again,
It's been awhile now i have all the parts and this repair place recommended by Fender fell through. Terrible company. I finally found someone that repairs amps including Music Mans here for some famous Thai bands. I just got a call from the guy and he says I missed two caps that I didn't supply. (2) 220uf50 caps. I don't see these on the list but here is a picture he took from my amp. Maybe someone replaced these two with larger ones? Could someone please let me know if they should be 150uf50 or do i need to get these two new ones at 220? I also added another picture so you can see clearly where it is.
Thanks,
William
Those are SUPPOSED to 150mF @
Those are SUPPOSED to 150mF @ 50V. They've been subbed before. Mike.
Cap job complete
Just wanted to give an update on this forever project. I was finally able to get all my caps replaced on my Music Man. Also needed some new rca plugs on the foot switch and now it is screaming like it used to. Thank you for all your help in identifying the capacitors. The guy in Bangkok did a great job on my amp.
Glad it all turned out
Glad it all turned out positive. Mike.