PVM 20M2/14M2/20M4/14M4/1954Q/1354Q cap kit list

[mikejmoffitt]

I took apart my PVM 20M2U and made an exhaustive capacitor list, and successfully re-capped it with success. I also re-capped a 1354Q with the same list, without any mismatches.

This covers the "A" board, and the CRT Neck board (I think the "C" board?)

Here's a digikey shopping cart list: http://www.digikey.com/short/3b0fcr

[xga]

Did you notice much of a difference between before and after re-capping?

[mikejmoffitt]

Did you notice much of a difference between before and after re-capping?

Huge difference. Minor geometry issues resolved, wrap-around on the top of the screen resolved (which also fixed the visible dim RGB calibration lines), and all ringing and moderate smearing of signals is now gone. The monitor now looks good when set to factory settings.

I also fixed a PVM 1354Q like this, which had completely broken geometry (unusably so). The 1354Q is more or less the 14M2, before the new naming scheme took over.

I will be applying this kit to my 14M4U soon as well.

[RGB0b]

Thanks for posting this. This might sound dumb to the experts on this thread, but sometimes trying to figure out which caps to buy is a bit intimidating. There's a ton of options and it's easy to make a mistake. Stuff like this is a gigantic help.

[ahaddow]

How dangerous is recapping? After reading about how fatal working on a CRT can be, since I have no training or education in things electric, I am kind of scared.

[korpse413]

Recapping arcade monitors is basically a necessity for the hobby. Yeah, the difference of hardware between an arcade monitor and a broadcast one is huge, but there is definitely overlap. Just as long as you discharge the monitor at the flyback you should be good to go (that is the part that can bite you and possibly kill you). Watch pretty much any video from a Youtuber called John @John's Arcade, hes always discharging and recapping monitors. He uses just a huge flathead that is grounded and puts one hand in his pocket in case something hairy happens.

Having a reliable repository of cap kits for a large spectrum of Broadcast monitors is definitely good to have as we are approaching a new decade of these things have been around. Cheers @retrorgb for (possibly) being that repository(?).

[Voliko]

Appreciate this. I have one of these but it has some geometry issues that I can't fix via the service menu. Might have to try this.

[AndehX]

my BVM 20G1E doesn't show any signs of needing recapped yet, but it's definitely something I would most likely end up doing in the future when issues start to arise. A repository for cap replacements would be most useful indeed.

[mikejmoffitt]

Agreed. If people can start making thorough cap lists for the monitors, it would be great going into the future.

[that1crzywhtguy]

I'm no expert, but I spent some serious time making a list for the PVM 2530. I put together a digikey cart (linked below). I've got one cart that is every electrolytic cap (all 232 of them!), and another that is all electrolytic caps for the geometry, convergence, and neck board. Hope this is helpful!

I also thought the spreadsheet I made (also linked below) could be useful (it's got every electrolytic in the set).

Carts:
Geometry, convergence, and neck board
http://www.digikey.com/short/jn837w

or

All electrolytics
https://www.digikey.com/short/jn8q4c


Excel List:
https://drive.google.com/open?id=1Mpa3z ... dtJxAEK2S-

Really hope this helps someone!

Cheers

Update 1: Updated digikey cart to replace obsolete/unavailable parts and to add caps for neck board
Update 2: Updated Spreadsheet to include all Electrolytic on all boards (some may not need replacement)
Update 3: Deleted board map photos. Don't think they were very useful in the end since I opted for shotgun approach to replacement.
Update 4: Added another cart that's the proper shotgun approach (it's got every single electrolytic cap in the set, all 232 of them!).

[flamie666]

I'm right now in the process of changing the caps (tedious task...). I bought mikejmoffitt's list, only had to change some caps that weren't available at the time. I have 2 14M2U so I bought the kit x2. I have some geometry issues in one and the other is a bit blurry too, so I will post my findings when I finish one.
Thanks for the cap list.

[flamie666]

Hi again,
I successfully changed all the caps of the A and C boards. The 14M2U works perfectly. There is some variation with the caps, specially the 47UF 25V, I used about 40 of them. I will count how many capacitors are left and order more for the other PVM. I will post some pictures of the A board and a comparison against my other PVM.

[SmokeMonster]

Thanks for this resource. My 1954Q could use a recap and this will save me some time it comes time.

[Brad251]

If you have the service manual for you set, does that make it easy to figure out which capacitors you need? If you don't have the service manual, how do you figure out which caps you need? I have some consumer Trinitrons that I would eventually like to recap and I will probably get some more consumer CRTs from other brands that I will want to recap as well. I don't have any soldering experience; is learning how to replace a capacitor something that could be done in a short amount of time?

[flamie666]

The service manual may have the capacitors list. There are some variation in sizes that you might consider so they fit. Consumer TVs generally don't have as many caps as a PVM. You should inspect your CRTs to count the caps and their values if they are not on the service manual. Changing the caps is an easy task, just practice with something that you don't care too much. you should take care inside a CRT, there are mortal voltages in the fly back transformer and the tube itself. Electronic knowledge always help but this is a mere technical task.

[flamie666]

Here are some pics of the PVM A board with the new caps installed:

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The left monitor is the one with the new caps, great picture!. The other PVM has a blurry image and not too much brightness. I don't know if is the tube or the caps. I want to try that PVM with the board that have the caps replaced to know if it will improve or not.

[Brad251]

Thanks for your help. There are quite a few tight spots on your board where it looks like it would have been challenging to solder a new capacitor there.

[mikejmoffitt]

Near the deflection stuff is a royal pain. Worth doing with high-temp caps and hoping to not do it again for a long time.

[flamie666]

@mikejmoffitt hehehehe you're so right... I don't want to do this any time soon... but...
Do you think that the lack of brightness and focus is caused by the caps? It takes some time for the image on that PVM to stabilize (I think this might be the caps that aren't charging as fast as they used to) but I don't know if they will fix these issues.

[greenhawk84]

I sure would like to know what capacitors to buy for my PVM-14N6U!

[22point8]

I sure would like to know what capacitors to buy for my PVM-14N6U!

Manual for you https://1drv.ms/b/s!ArJdQhcOk1dnllqDRD6QOszqUam4

[mvsfan]

i think its about time to re-cap my Sony Wega because its starting to get an annoying curl on one side of the screen.

probably also time to change 2 ICs. its starting to take a long time to turn on. the power light flashes 9 times before it turns on.

Its from 2002.

[unmaker]

I took apart my PVM 20M2U and made an exhaustive capacitor list, and successfully re-capped it with success. I also re-capped a 1354Q with the same list, without any mismatches.

This covers the "A" board, and the CRT Neck board (I think the "C" board?)

Here's a digikey shopping cart list: http://www.digikey.com/short/3b0fcr

So I'm looking into recapping a few of my PVM's but I noticed that some of the capacitors in your list are rated at 85°C. Wouldn't it be ideal to use all 105°C capacitors or is it not that big a difference over 85°C caps as long as their a quality brand like Nichicon?

Also apparently there was a service bulletin about the 2.2uF capacitor at C584 which recommends replacing that capacitor with a 1uF 160V 105°C high ripple capacitor.

Just copy and pasting from here

Spoiler

What problems are you having that you want to recap? I was researching this myself and it seems there was a service bulletin about one particular cap on the M2/M4 line so you might want to do that one single one first:
Model: OEV143, OEV203, PVM-14M2MDU, PVM-14M2U, PVM-14M4U, PVM-20M2U, PVM-20M4U, PVM-20M2MDU
Part required: Sony pt# 1-124-940-51 Cap, 1uF/160V, 105 degree C high ripple Qty: 1
Modification procedure:
Replace C584 (2.2uF) with 1UF high ripple capacitor. NOTE: Since the diameter of this new capacitor is larger than that of the previous capacitor, make sure the C584 capacitor does not touch the Q503 heat sink or the D527 lead wires.
Perform the deflection adjustment according to service manual.

It also appears this may be relevant to the 195X models as well

https://www.electronicspoint.com/thread ... sue.67832/

[mikejmoffitt]

I mostly went by brand, but I think a few of those might have been last-minute changes from one choice being unavailable. If you'd want to swap out any for higher-rated caps and/or better brands, go for it, I'd be down to change out the first post with an improved list.

This does cover the 195x/135x series too, I put it in the thread title.

[unmaker]

I mostly went by brand, but I think a few of those might have been last-minute changes from one choice being unavailable. If you'd want to swap out any for higher-rated caps and/or better brands, go for it, I'd be down to change out the first post with an improved list.

This does cover the 195x/135x series too, I put it in the thread title.

What I meant to say by mentioning the 195x/135x models is that they may be prone to the same horizontal RGB lines that involve the capacitor at C584. There was apparently a service bulletin recommending that capacitor be replaced with a 1uF 160V 105°C high ripple capacitor. Here are two other threads mentioning the issue:

http://shmups.system11.org/viewtopic.php?f=6&t=55802

http://shmups.system11.org/viewtopic.ph ... 1#p1135021

[mikejmoffitt]

Shit, the shopping list is gone now. Not sure what happened to it.

[leonk]

Guys. You should consider putting a list together and giving it to console5.com

He has a great wiki to permanently store this info. His cap kits also cost less than digi-key/mouser because he buys the caps in huge bulk volumes and passes the savings to you!

[kaedwood]

Appreciate this. Does anyone have the pvm 1354q service manual?

[22point8]

Appreciate this. Does anyone have the pvm 1354q service manual?

https://1drv.ms/b/s!ArJdQhcOk1dngxmfZLXbxBSJpcuK

[kaedwood]

Appreciate this. Does anyone have the pvm 1354q service manual?

https://1drv.ms/b/s!ArJdQhcOk1dngxmfZLXbxBSJpcuK

Thanks.