How different are flybacks?

telmnstr

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How different are flybacks? Still have a 7201 I'm troubleshooting.

At the hackerspace a 15" or 17" PC monitor came in and a friend heatgunned all the parts off for the misc box. In there is a flyback with what looks like a similar pinout.

The thing is, the schematic for the 7201 doesn't really list a part #, so I'll have to look at it when I get over there this eve. Going to see if I can find a data sheet for both components and compare.

But are flybacks fairly standard components that are easy to cross reference?
 
The 053X0641-001 is the flyback for the K7201. $20 from Bob Roberts...
 
The 053X0641-001 is the flyback for the K7201. $20 from Bob Roberts...

I emailed him about buying one or two, but never got an email back. I think there was something else on the page. Guess I need to give it another go.

I'm just somewhat randomly replacing everything at this point :) I'm thinking the HV shutdown might be activated, need to figure out how that is set (how the position on the pot is figured out.) I haven't touched it yet. But there is no HV past the isolation xformer so...

I can't find any datasheets on these things. Grrr. The WG original is a Taiwan Meritron, the other on hand spare I have is a DuGo
 
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good news though, you are able to use the regular plain jain k7000 flyback 053X0528-001 as a replacement for the 053X0641-001!!!.. I did readings they are both spec same.
not many flybacks cross that is correct.. few and far between.. most of them are chassis specific. yes the mount will be slightly differnt however internaly the 0528 internals are the same as the 641.. you wont be able to screw it down the bracket support.. thats what wire ties are for. :)
 

It's the first thread I checked. I've replaced a good number of parts in it mentioned, and tested r005 (out of circuit even, looking at it.) I'll pick up a new one tomorrow assuming Radio Shack still carries them. All I have on hand is 1/4 watt version of 560k ohm resistor.

Your issue matches mine exactly. She was working, but would randomly have the monitor cut off. Finally it just did it for good.

For some reason I have no problem fixing my friends games, but when it comes to my own, they kick my butt.
 
Got life last night! Culprit seems to be R007.

I didn't have proper size on hand, just a 1/4 watt version, but the monitor showed signs of life. Radio Shack doesn't carry 47k in 1/2 watt so I'm off at lunchtime to get one from the only game in town for electronics parts (which means the part will be circa 1975 heh)

The downside is with the 1/4 watt resistor it didn't seem to come up properly, mostly a scan fail situation, or perhaps repetitive shutdowns. With so much hacking on it trying to figure out what was wrong, I'm going to go back and recheck all the solder joints, make sure I didn't miss anything. It's been totally recapped now, in the most expensive way possible (costs about $30 for a set of caps for a monitor from the local electronics supplier. )

Once I verify what the fix is, I will go back to my earlier thread and post a reply for the next person that might come along with the similar issue.
 
Status report. Replaced R007 with a proper 1/2 watt 47K resistor. Monitor whines a bunch, sounds like it was gonna go thermonuclear (pitch gained) and for a split second it came to life, but then shut down with a scan fail type scenario. Dot in the middle, I rapidly switched it off, don't want a phosphor burn in the middle.

During troubleshooting a few weeks ago I replaced the two transistors on the line connected side (q001 and q002 IIRC) as well as the IC over there. One of the trannies was a NTE cross reference I think, so I'm going to switch it back to the original parts and see where that gets me.

So close!
 
Oh yea, it was all plugged in.

I swapped out the NTE replacement IC that I had tried for the PWM IC (which I guess is a switchmode power supply.) Put it back to the original. It came up, picture looking beautiful.

Sometimes the monitor powers on okay, sometimes it doesn't. When it doesn't I do hear the "static sound." Power cycling will result in a working picture.

There is a buzzing sound coming from the monitor PCB though. I haven't run it for any long periods of time yet, but in the short start and stops I think it shut down once. Trying to listen I can't really tell exactly what it is, but it sounds like it might be one of the transistors Q001 or Q002, which I assume are being driven by the PWM IC. Maybe it's normal? Doesn't really sound healthy tho.

I checked the Q001 and Q002 to see if they were generics but they are proper parts. Hmmm. Given the monitor being mounted in the cabinet, I'm wondering if this problem has been there. In the past it's "shut off" once in a blue moon, and when it did the final time before R007 died I just figured a power cycle would bring it back.

Hmmm more fun for this weekend! Can't wait to put this one behind me and move on!
 
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