K5501 cap question

Bullwinkle

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Does anyone have a cap map or can someone point me to a manual for a K5501. I've been told this WG model is the same as the 4900 series but it's for 25" tubes. I started going over the caps on the board and noticed that the values of the first dozen or so caps were identical, so I just used the 4900 cap designations as an ordering tool... now I'm finding some of the bigger caps near the flyback have a substantially higher voltage rating than the ones I ordered using the 4900 manual and the cap at 313 is a 47uf 160v cap in the 4900 manual, but the one onboard was 100uf 160v (this is the only cap that had a different MFD value)

Now the board obviously has been re-worked before, but I'm wondering if I the previous technician simply used what he had and went high on the voltage values for caps or if the values in the board are spec for a 5501.

Any help is greatly appreciated, thanks.

-tom
 
I have a 5501 chassis I can get to in a few days. Have you compared it to the 5515 manual to see if the differences there from the 4901 match yours?
 
I have a 5501 chassis I can get to in a few days. Have you compared it to the 5515 manual to see if the differences there from the 4901 match yours?

Isn't the 5515 medium res? not sure if that would make a difference in cap values or not. I can take a look at the manual in any case to see.

thanks modessitt

-tom
 
I asked a similar question the other day. I'd used a manual to order the caps, but when I received the caps and started to work found that the values on the board were different.
 
I capped both a 5501 and a 5515 in the last couple of months, but I didn't compare the two. I usually have bulk caps on hand and just cap them with identical values. Pretty sure the 5501 and 5515 use the same caps. There are other differences that make it med-res...
 
Yup..checked the 5515 manual and it's similar to the 4900 manual. So I capped it with what I had. (an example of the crap i was pulling off the board was a 10uf 350v cap when the manual called for 10uf 160v. A couple others were 10uf 200v caps where it called for 10uf 100v. I suspect the previous work simply used what they had, but I needed to make sure before putting in an undervalued cap.

Thanks for the heads-up on looking at the 5515 manual, modessitt.

-tom
 
It's always good to check the manual when you can to be sure, but replacing a cap with a higher voltage rating is just fine, so there was no issue there. It's when you don't have one as high as what is in there that you need to check the manual to find out how low you can go.

I know for sure that C313 is a 4.7u@160v on the 19" and a 10u@160v on the 25"...
 
I've capped the chassis including the filter cap and replaced the two vertical transistors and still have vertical collapse...I've reflowed solder in the vert out area to no avail... anything else I might try?

Thanks
-tom
 
Check other parts of the chassis. If there is a break around the yoke connector, it will be collapsed. And measure the vertical yoke. it should be about 37 ohms or so...
 
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