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Yamaha PB1 Parts Still Available?

flemmings27

flemmings27

Jul 26, 2020
15
10
#1
Hello All

Newb here. Does anyone know if you can still get potentiometers and other types of amp parts for a Yamaha PB1? And since I know nothing about how to repair amps, if someone out there will be still be able to fix this beast. Also, if it's alright to post this in two places, I'm going to put this in the amp forum also.

Thanks
 
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#2
They should be pretty standard parts. The only things that is an issue sometimes is some of the manufacturers sanded the numbers off of transistors and IC’s. Figure out the values and physical sizes you need and check out tubesandmore.com or mouser.com.
 
#4
Welcome to Talkbass!

This forum is mainly for discussion of pickups and onboard electronics in basses. Cross posting stuff the Amps forum natively covers isn't necessarily a huge faux pas, but I'd guess that even the Effects forum might have a little better correlation. ;)

What parts specifically do you need, and did you start your search by contacting Yamaha tech support? In any case, I'm attaching a copy of the PB1 service manual. Hope it helps.
 

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#5
flemmings27 said:
Hello All

Newb here. Does anyone know if you can still get potentiometers and other types of amp parts for a Yamaha PB1? And since I know nothing about fixing amps whether someone will still be able to fix this beast. Also, if it's alright to post this in two places, I posted this in the electronics and parts forum area too

Thanks
Click to expand...

Joyce if you find out, let us know. I need two knobs for mine and can't seem to find them anywhere.
 
#6
flemmings27 said:
Hello All

Newb here. Does anyone know if you can still get potentiometers and other types of amp parts for a Yamaha PB1? And since I know nothing about how to repair amps, if someone out there will be still be able to fix this beast. Also, if it's alright to post this in two places, I'm going to put this in the amp forum also.

Thanks
Click to expand...

What's it doing or not doing? I use a guy down my way who's pretty durn good. IME, a Yammie PB-1 is worth repairing...within reason.

Tom — Alpha Music - The Premiere Local Music Store | Virginia Beach

Riis
 
#7
Any QUALIFIED service yamaha service center that works on Yamaha MI and pro audio gear will have the resources to be able to repair this.

They used many of the same (or similar) parts throughout their pro audio lines and should have suitable if not identical parts available.
 
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#9
Passinwind said:
Welcome to Talkbass!

This forum is mainly for discussion of pickups and onboard electronics in basses. Cross posting stuff the Amps forum natively covers isn't necessarily a huge faux pas, but I'd guess that even the Effects forum might have a little better correlation. ;)

What parts specifically do you need, and did you start your search by contacting Yamaha tech support? In any case, I'm attaching a copy of the PB1 service manual. Hope it helps.
Click to expand...

Hi thank you so much for the service manual. My answer to your Q about whether I started by contacting Yamaha, the answer was "no" because I received the amp at the end of the week and Yamaha wasn't open, so I started asking my questions where I could ask them first. I've been in touch with Yamaha, and their first answer was no because they couldn't obtain the service parts manual, and when I asked that particular guy if I could get the service parts manual, would he be able to tell me, and he sloughed off my question by telling me I should just return the amp. Thanks again - love the Sgt. Schultz icon - did you know that John Banner was a US Army WWII vet and he was featured on an army poster during the war? That was way before he liked to eat alot! :)
 
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#11
Zooberwerx said:
What's it doing or not doing? I use a guy down my way who's pretty durn good. IME, a Yammie PB-1 is worth repairing...within reason.

Tom — Alpha Music - The Premiere Local Music Store | Virginia Beach

Riis
Click to expand...
Some of the knobs are very noisy in the typical way that pots can become dirty over the years. But a couple of the knobs make a warbling noise when you change them. I'm pursuing this a little further - I'm hoping I can keep it, and yeah, I know they're worth fixing. I used that pre-amp as part of my live rig gear for a few years. They sound great.
 
#12
agedhorse said:
Any QUALIFIED service yamaha service center that works on Yamaha MI and pro audio gear will have the resources to be able to repair this.

They used many of the same (or similar) parts throughout their pro audio lines and should have suitable if not identical parts available.
Click to expand...

Hey Aged Horse - thanks for your response; trying to chase that issue with Yamaha right now is a pain b/c of Covid, because none of them are in their building where their service parts manual is. Or at least that's the story the one service tech guy told me; even when I told him I could probably get him the service manual, he sloughed off my question. So I got the service parts manual from someone on here and am back on the phone right now waiting to talk to someone, hopefully someone different who's more open to chasing the issue.
 
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#13
flemmings27 said:
Hey Aged Horse - thanks for your response; trying to chase that issue with Yamaha right now is a pain b/c of Covid, because none of them are in their building where their service parts manual is. Or at least that's the story the one service tech guy told me; even when I told him I could probably get him the service manual, he sloughed off my question. So I got the service parts manual from someone on here and am back on the phone right now waiting to talk to someone, hopefully someone different who's more open to chasing the issue.
Click to expand...
Once you have the part numbers from the service manual, that number will show in the service database the evolution and revision level of that part. Often a basic part will remain the same for decades, yet will evolve as vendors change, RoHS status changes, etc. Yamaha is very good at maintaining this information.

That said, unless you have that part number, they will generally be unable to help, and many companies have a policy of not researching parts for obsolete equipment for end users as it can take an enormous amount of time. Qualified Yamaha service centers will have access to different people than the end user and quite often can look at a part, recognize a current product that uses the part and access it (and the correct part number) that way.

I serviced Yamaha (mostly pro audio consoles) back in the day so I am familiar with how this system works. The parts are coded in a way that makes it easy to reference when a designer is looking for existing parts in a new design.
 
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#14
agedhorse said:
Once you have the part numbers from the service manual, that number will show in the service database the evolution and revision level of that part. Often a basic part will remain the same for decades, yet will evolve as vendors change, RoHS status changes, etc. Yamaha is very good at maintaining this information.

That said, unless you have that part number, they will generally be unable to help, and many companies have a policy of not researching parts for obsolete equipment for end users as it can take an enormous amount of time. Qualified Yamaha service centers will have access to different people than the end user and quite often can look at a part, recognize a current product that uses the part and access it (and the correct part number) that way.

I serviced Yamaha (mostly pro audio consoles) back in the day so I am familiar with how this system works. The parts are coded in a way that makes it easy to reference when a designer is looking for existing parts in a new design.
Click to expand...


Hey Aged Horse - thanks again for this info. I just finished a conversation with a Yamaha Parts and Service tech. She said that some of the items, such as the circuit board, etc, are no longer available because they are old. But other parts, such as transistors, etc, are not proprietary, so all I would need to do is Google search those numbers to see if they are still available. For those watching this thread, user PASSINWIND provided a link to the service manual above. When you get to the "Parts List," it will look like this below. The column called "Part No" is the number that Yamaha identifies the item by. Any number that appears under "Description" is the number of non-proprietary parts that you would stick into a Google search to see if it exists. Also FYI everyone, the Yamaha techs are somewhat hampered in their ability to give you info because of COVID - they are not in their offices and can't access databases, etc.

upload_2020-7-28_12-34-41.png
 
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#15
Doufuss said:
Joyce if you find out, let us know. I need two knobs for mine and can't seem to find them anywhere.
Click to expand...


Hey Doofus - I have what is essentially the answer now. Check out Passinwind's response to my query - he posted the Service Manual to it. And then check out my 2nd response to Aged Horse where I explain what Yamaha told me about the parts, etc, and posted a picture of the Parts Service Manual to show what I was explaining.
 
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#17
If you enquire using the Yamaha part number, they should be able to cross that to the most current part version for that part number which may be suitable (if there is a cross).
 
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#18
This is cool. I randomly selected a couple of parts from the list and they come up in google. You'll easily find all your parts.

Completely unlike my old Fender guitar amp where finding even a switch is like solving some big mystery. Fender assigns a part number to it which doesn't cross reference to anything. :(

I found one that'll do by removing the old and reading the case.
 
#20
agedhorse said:
Each company has a different way of handling part numbers for manufacturing purposes.
Click to expand...

Manufacturing, inventory, etc. There's a lot of good reasons to do it that way. A company I worked for for many years had their own part numbers for all repair/replace part stock and a bewildering variety of nonsensically applied cost codes to labor and equipment. It all went back to the original accounting system set up in 1975. If you weren't raised in their system it was pretty hard to find "you know, the thing"

But the parts are the parts. They have their x or y value, voltage/amperage rating, and size.

In my case, it would have been good to look at the schemo and see those numbers.

In this case, with Yamaha, it's a dead certainty you're going to get what you need.

One man's opinion.
 

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