U5000 manual/schematic part discrepancies...

modessitt

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So, I don't currently have a U5000 cap listing on my site, and I'm working on some today, so I decided to make the listing (even though I have in the past but can't find it now).

Anyway, the first cap I pull is C117, which is a 22uf 50v. I check the part listing in the back of the U5000 Service Manual and it shows it as a 10uf 50v. :confused: I then check the U5000 Schematic and it shows it as a 22uf 63v. :rolleyes:

Okay, so I match the new part to the schematic and put that on my listing.

Then I come to the next part - C725. This cab has had the label coating come off. I check the Service Manual and it shows a 100uf 50v. I then check the schematic and it shows a 22uf 100v. I then check another U5000 chassis and it shows a 22uf 100v, so that has to be right.

Seems to be quite a few part discrepancies between the service manual and the schematic, so I'll be having fun doing verifications to make sure the listing is accurate.

Just an FYI in case anyone gets a cap kit from someone that was based off the service manual instead of the schematic...
 
Ok, here's an interesting one.

C700 was a 220uf 16v. Service Manual lists it as a 220uf 16v. Schematic lists it as a 47uf 16v - same as C600 (which is listed as a 47uf 16v in the Service Manual). Now, the other U5000 chassis has a 220uf 16v cap there.

So - Is it possible the Service Manual is an updated listing with part mod updates? C700 is in the horizontal sync input circuitry, and C600 is in the vertical sync circuitry.

It also lists C616 as a 1000uf 50v instead of the normal 1500uf 35v that was original, and Bob"s cap kits always put 1000uf's in for that location.

Should I base my listing off of what the schematic says, what the parts listing says, or what is actually there? Unfortunately, this chassis had been worked on in the past, so there is no guarantee that these parts were original...
 
Okay, I dug out a U5000 that had never been worked on, and it has a 220uf 16v cap there, so that's what goes on the list. It has caps that match the schematic for C117, C616, and C725 also.

So - I guess I'll refer to this untouched chassis for my listing if there is a discrepancy...
 
So - I guess I'll refer to this untouched chassis for my listing if there is a discrepancy...

That's what I would do unless you come across a service bulletin or upgrade kit that says otherwise.

C613 is the only cap see mention in the typical upgrades. Vertical Sweep upgrade kit has it listed as a 100uf 50v. (is a 35v on schematics and manual parts list)
 
Welcome to the wonderful world of Wells-Gardner! Remember, many times things change between the times the schematics & manuals are printed and the actual chassis production. Then of course there are always Wells' famous undocumented "improvements/changes" done during production.

I replace the caps with what is originally installed on the chassis unless a service bulletin says otherwise.
 
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Well, I finished the kit, and other than what I already posted, it had a 4.7uf 160v on the schematic for C504 on the neckboard, and a 4.7uf 200v in the service manual.

Of further note, I found someone put a K7400 neckboard (P719-I) on this chassis instead of the U5000 neckboard (P719-F or P719-H). Considering the U5000 is dual-res and has extra parts on the neckboard that the standard-res K74000 neckboard does not, I'm replacing it with a U5000 neckboard. I've seen problems in the past with people putting the wrong standard-res neckboard on the dual/medium-res chassis....
 
I have a couple U5000 chassis with the P719-I neckboard.
I also have a K7400 with a P719-J listed on my parts inventory sheet I did up awhile back.

Just trying to add to the confusion. :)
 
Does it work with the -I? Does it have caps at C519 and C541?

I only have one of the U5000's up and running in a machine, but haven't looked at it in forever, can't recal which neckboard it has on it currently. And that machine is buried right now.
The others are chassis sitting in a box....I haven't had a need to mess with fixing them yet. (don't like the U5000's anyways)

But when I did my monitor parts inventory a couple years back I made sure to write down chassis, neckboard, and remote board designations from everything I had on hand, that's where I pulled that info from.
 
I am rebuilding the U5000 in my SW Trilogy and was wondering

What cap did you install at C729 ? The 220uf 50 or the 10uf 50 NP
Mine came with a 10uf50 in it and it looked original so that is what I used. Bob's kit calls for the 220uf50 at that location. I think the schematic said 220, my chassis had a 10uf50 np so I stuck with that.

Also,
My 10uf63v from location C810 has been soldered to the bottom of the board across Q808.
I wasn't sure if I should move it back to it's original location or leave it. Maybe it was a service bulletin procedure ?

I should note that P&L has a sticker on this chassis and it looks like they "capped" it. I use the term capped loosely as they only replaced about half the caps.

Getting ready to fire this thing up and give it the smoke test.
 
If you have a 10uf 50v NP cap at C729, then you don't have a U5000. You have either a K7400 or a K7500...
 
It could be a 7500 i guess. It does not look like a 7400, i didn't see a picture of the 7500 and looks just like the U5000. It does have the P719-I neckboard, the main board says P738-F.
 
BTW, it has that dual plug connector near the middle of the board. Isn't that only on a U5000 ?
I am still pretty sure this is a U5000. It was capped before so someone could have put in the wrong cap at C729.

You guys tell me , pics...
P1050100.jpg

P1050099.jpg
 
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It's a U5000. yep, someone used the wrong kit when rebuilding it. Use the 220uf cap. You may want to verify the other caps.

I haven't added the U5000 list to my site yet, but here it is:


===================
Wells-Gardner U5000
===================

----------------------
Neckboard P719-F/H/I
----------------------

C501 - 10uf 25v
C502 - 10uf 25v
C503 - 10uf 25v
C504 - 4.7uf 160v
C507 - 100uf 16v
C512 - 1uf 50v (Negative leg towards the adjustment pots)
C519 - 4.7uf 25v
C530 - 10uf 25v
C541 - 4.7uf 25v (Unmarked location. Positive leg on collector of Q501. Negative leg on closest side of W515.)

--------------------
Main Chassis P738-F
--------------------

C105 - 270uf 400v (Filter)
C107 - 33uf 160v
C115 - 100uf 200v
C117 - 22uf 63v
C304 - 1000uf 25v
C305 - 2200uf 35v
C310 - 10uf 200v
C600 - 47uf 16v
C602 - 10uf 25v
C605 - 100uf 35v
C607 - 470uf 35v
C610 - 2.2uf 50v
C613 - 100uf 35v
C615 - 33uf 16v
C616 - 1500uf 35v
C700 - 220uf 16v
C701 - 10uf 25v
C706 - 1uf 50v
C709 - 1uf 50v
C712 - 1000uf 16v
C713 - 4.7uf 25v
C716 - 1uf 200v
C725 - 22uf 100v
C729 - 220uf 50v
C730 - 4.7uf 25v
C731 - 10uf 25v
C732 - 10uf 25v
C805 - 2.2uf 200v
C808 - 2.2uf 200v
C810 - 10uf 63v


HOT - C3686
Flyback - 053X0624-001
Yoke - 9A2988-1
 
Going through mine again and I am wondering about c616. You have a 1500uf, mine has a 1000uf, Bob's kit says 1000uf or 2200 uf depending on the monitor, u5000 manual says 1000uf, wondering if your 1500uf at c616 is a typo ?

Edit: My c810 was not populated. Bob's kit shows like yours with a 10uf63 there but nothing in the k7400 or k7500.

Double Edit: Looks like my 10uf63 is soldered across the bottom of Q808.
 
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Going through mine again and I am wondering about c616. You have a 1500uf, mine has a 1000uf, Bob's kit says 1000uf or 2200 uf depending on the monitor, u5000 manual says 1000uf, wondering if your 1500uf at c616 is a typo ?

Like I said in the 3nd post (I think), the manual's parts list shows a 1000uf, which is commonly used during a rebuild because a lot of parts suppliers don't stock a 1500uf cap, but the schematic shows it was originally a 1500uf cap, which is what I order and use, and which is why it's listed on my cap listing:

U5000C616.png
 
Thanks. I put the 1000uf in since I don't have the 1500. Monitor is still dead :(
Checked the hot and almost everything in the flow charts. No B+ at all. Can't really hear the tick so not sure if it's in shutdown. Has a new flyback too. Gotta be something really lame I am overlooking. Flowed new solder in lots of places too.
 
It's a U5000. yep, someone used the wrong kit when rebuilding it. Use the 220uf cap. You may want to verify the other caps.

I haven't added the U5000 list to my site yet, but here it is:


===================
Wells-Gardner U5000
===================

----------------------
Neckboard P719-F/H/I
----------------------

C501 - 10uf 25v
C502 - 10uf 25v
C503 - 10uf 25v
C504 - 4.7uf 160v
C507 - 100uf 16v
C512 - 1uf 50v (Negative leg towards the adjustment pots)
C519 - 4.7uf 25v
C530 - 10uf 25v
C541 - 4.7uf 25v (Unmarked location. Positive leg on collector of Q501. Negative leg on closest side of W515.)

--------------------
Main Chassis P738-F
--------------------

C105 - 270uf 400v (Filter)
C107 - 33uf 160v
C115 - 100uf 200v
C117 - 22uf 63v
C304 - 1000uf 25v
C305 - 2200uf 35v
C310 - 10uf 200v
C600 - 47uf 16v
C602 - 10uf 25v
C605 - 100uf 35v
C607 - 470uf 35v
C610 - 2.2uf 50v
C613 - 100uf 35v
C615 - 33uf 16v
C616 - 1500uf 35v
C700 - 220uf 16v
C701 - 10uf 25v
C706 - 1uf 50v
C709 - 1uf 50v
C712 - 1000uf 16v
C713 - 4.7uf 25v
C716 - 1uf 200v
C725 - 22uf 100v
C729 - 220uf 50v
C730 - 4.7uf 25v
C731 - 10uf 25v
C732 - 10uf 25v
C805 - 2.2uf 200v
C808 - 2.2uf 200v
C810 - 10uf 63v


HOT - C3686
Flyback - 053X0624-001
Yoke - 9A2988-1

MODESS !!!!.. my chassis is the same as ARC's except i don't have the small board as CN202 and my neckboard is a P719 but no other letters...the sticker on mine says 54A7401-008/A.. have no idea what that is.. but it's missing all those parts i told ya....i did some testing tho... all the trans are good except Q509 510 511..they were iffy so they are getting replaced..and the 12v zener is flaky Z500...more to follow... anyway..let me know what you think... remember..mine is a 25K5108 :)



END OF LINE.

Daniel.
 
Thanks. I put the 1000uf in since I don't have the 1500. Monitor is still dead :(
Checked the hot and almost everything in the flow charts. No B+ at all. Can't really hear the tick so not sure if it's in shutdown. Has a new flyback too. Gotta be something really lame I am overlooking. Flowed new solder in lots of places too.

Dead U5000's that don't tick tend to be due to an open R760, open R765, shorted Q708, or shorted Z705 - in that order...
 
MODESS !!!!.. my chassis is the same as ARC's except i don't have the small board as CN202 and my neckboard is a P719 but no other letters...the sticker on mine says 54A7401-008/A.. have no idea what that is.. but it's missing all those parts i told ya....i did some testing tho... all the trans are good except Q509 510 511..they were iffy so they are getting replaced..and the 12v zener is flaky Z500...more to follow... anyway..let me know what you think... remember..mine is a 25K5108 :)



END OF LINE.

Daniel.

Arc's is a 27" version.

If your only problem is missing colors, then it should be fairly easy to trace the voltage from the video input connector to the neckboard, then through to the input of U501, then to the drive transistors, then to the socket...
 
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