WG 4900 Cap Kit Discrepancies

JoeB1355

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I was installing a cap kit in a WG4900 I believe 4906 is what was stamped on the frame.

I have 3 discrepancies -- This all looks factory as in the first cap kt ever in this monitor

C308 cap kit says 2.2 50v, what was in there 3.3 50v
C313 cap kit says 100 160v, whats was there 47 160v
C301 cap kit say 330 25v, what was in there 330 50v

so does the cap kit have upgrades?

should I seek out the ones that were in there?
 
I was installing a cap kit in a WG4900 I believe 4906 is what was stamped on the frame.

I have 3 discrepancies -- This all looks factory as in the first cap kt ever in this monitor

C308 cap kit says 2.2 50v, what was in there 3.3 50v
C313 cap kit says 100 160v, whats was there 47 160v
C301 cap kit say 330 25v, what was in there 330 50v

so does the cap kit have upgrades?

should I seek out the ones that were in there?

C301 is OK. Bigger voltage, same capacitance = OK

The wiring diagram does show C308 as a 2.2 50 volt and C313 as a 100 160 volt.

Maybe they were changed because it makes the monitor work better? I'd call the Cap kit maker and ask.
 
I just did a cap kit on a K4901 and came across the same thing. Double check all of your caps. I found one that seemed way off but after looking I found the correct uf with higher V. Higher V is fine. My kit was from Bob Roberts.
 
C301 is OK. Bigger voltage, same capacitance = OK

The wiring diagram does show C308 as a 2.2 50 volt and C313 as a 100 160 volt.

Maybe they were changed because it makes the monitor work better? I'd call the Cap kit maker and ask.

C301 is not larger voltage its smaller... 50v was in the monitor the new cap was only 25v -- hence my concern of just swapping it.
 
I just did a cap kit on a K4901 and came across the same thing. Double check all of your caps. I found one that seemed way off but after looking I found the correct uf with higher V. Higher V is fine. My kit was from Bob Roberts.

Yes my Kit was from Bob too -- I don't think its wrong. I'm just trying to find out if I needed a variant or if its correct to change the values to whats in the kit.

I verified each and every cap as I swapped them that's how I found the discrepancies.
 
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I was installing a cap kit in a WG4900 I believe 4906 is what was stamped on the frame.

I have 3 discrepancies -- This all looks factory as in the first cap kt ever in this monitor

C308 cap kit says 2.2 50v, what was in there 3.3 50v
C313 cap kit says 100 160v, whats was there 47 160v
C301 cap kit say 330 25v, what was in there 330 50v

so does the cap kit have upgrades?

should I seek out the ones that were in there?

The 4906 is the early version...your original caps are correct. I always replace with the same values as the originals.

Edward
 
C301 is not larger voltage its smaller... 50v was in the monitor the new cap was only 25v -- hence my concern of just swapping it.

Sorry, my mistake. I'd still call Bob or email him about it.
 
Sure I can tell Bob. I asked for a 4900 though not a 4906 when I ordered just in case he has both, but I can drop him a line just to let him know for future folks that may ask for a 4906. I wasn't sure on the minor rev until I pulled all apart and started the job.

(I'll probably have to order a few caps any way -- gotta check my bin first maybe I'll get lucky!)
 
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I'm always saving boards out of old TVs. So when I need a cap, I go on a cannibal run though the boards looking for good one to steal.

Of course I test them before I install them.
 
If you're unsure, just change what you know to be OK and re-fire the chassis. At the best your issues are resolved, at the worst you need to source 3 more caps.

You could get lucky.
 
You should always check manuals to see what is supposed to be there. If I'm doing a cap kit and don't have a 10u25v cap, I might put a 10uf50v cap in. The next guy to work on it may get a kit with a 10uf25v and not know what to do. That's why you check the manual.

But the 2.2 instead of the 3.3 is fine...
 
Most times the reason a cap value is different is because there might have been a field update to correct a known issue. Bob takes this into account.
 
So how do you test a capacitor?

I know how to test lots of other things but unless it was shorted or something other than watching charge up etc on ohms.

without a good way I bet lots I've tossed from cap kits were just degraded not bad bad.

I don't have any capacitance mode on my meter.

What do you use?
 
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