Hantarex Polo problems

LyonsArcade

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Hi guys;
I have a Polo 25" that I fixed (ahem) a few months ago with a flyback and capkit. today it started going into shutdown with the flyback clicking again. I checked the HOT and it's fine. Per Randy Fromm's flowchart I've checked several diodes and caps, and all are fine. Anybody have any idea what would make it go into shutdown but still have a good HOT?

The bottom of the board looks great, hardly any burn areas and everything seems to be making good connection with no bad solder joints or lifted traces. Underneath it looks practically new.
 
Yeah, I checked all those (especially the two Fromm mentioned, kind of right in front of the hot and up on legs). Everything checked out.
 
O.K., I've been working on it somemore. It's doing the click click thing where it turns the power supply on and off. I replaced the flyback just for giggles, same problem. I checked and rechecked the HOT, it's fine. I checked every diode on the board, they're all fine. I checked ZD101, I checked T101, I replaced IC101, I checked all the resistors in the power supply section and can't find one out of spec.

Anybody have any ideas? Oh I also replaced C112.

B+ is testing at between 70 and 90 vdc, but it fluctuates of course as the power supply turns on and off. I'm not sure if it's on long enough to lift up to where it needs to be or not...
 
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It's between 70 and 90, back and forth as the power supply switches on and off. I'm thinking something's shorting out and causing it to draw too much of a load in the horizontal deflection circuit, so I'm looking there now. The Hot and all the diodes and resistors seem fine though, I'll keep looking.
 
I'm getting somewhere! In circuit, R228 is a dead short. I'm gonna see what's connected to it to see what the problem is.

Edit: Nevermind. It's supposed to be like that in circuit... this thing is a pita, everything checks out o.k., and it's not blowing the HOT or any of the other transistors, because nothings' shorted that I can find, but yet it shuts down like it's shorted. Grrrrrrr.
 
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I have one doing the same exact thing right now. Mine was working fine until I moved it to a different location and now its doing the click click click thing. I was just figuring something came loose, I havent pulled the chassis yet to find out. If you figure out what it is I'd really like to know.
 
Which one? I think there are two(I didnt get a good look I just got it today) Those are cement resistors right? Where did you get yours from?
 
as per what Chad's told me when my Polo was down, a common problem is the solder joints outright break on the white block resistors, and as such, create all kinds of havoc on the electronics on the other side of the incoming current. :)

3 repairs later, I'm not entirely sure why my Polo did the click-click-click. all I know is this time I dropped some money and had Chad rebuild the damn thing right.

enclosed in the return box was another flyback. I asked him what the deal was, if it was an extra. it had a label saying "UNKNOWN FLYBACK" -- the one that PNL installed for me. yep, they had the wrong flyback in it.

if you wanna spare yourself the torture and potentially going grey, just send it to him cause he "knows" them. most of the guys on here will tell you they're the biggest pos's in existence, but pound for pound, I'll take the Pepsi challenge with a Polo and any WG monitor and will give the nod to the Polo every single time in terms of picture quality.

I hope you can get this resolved. I went about 6 months without mine.
 
I don't know what's up with mine, I may have to send it in to Chad. The resistors are all still soldered well, on mine the bottom of the board is in excellent condition, no lifted traces, no burn marks, nothing. It looks like it was just built yesterday. Everything's making good contact, etc. Usually when it does the hv shutdown thing, it's because something's shorted out, but nothing is. The HOT isn't shorted, all the resistors and caps aren't shorted, but yet it still shuts down.

I'm not going to use P&L either anymore, I had them rebuild a U2000 one time that only lasted 2 days before I had to send it back to them, the shipping gets rediculous when you have to do it over and over again.
 
I don't know what's up with mine, I may have to send it in to Chad. The resistors are all still soldered well, on mine the bottom of the board is in excellent condition, no lifted traces, no burn marks, nothing. It looks like it was just built yesterday. Everything's making good contact, etc. Usually when it does the hv shutdown thing, it's because something's shorted out, but nothing is. The HOT isn't shorted, all the resistors and caps aren't shorted, but yet it still shuts down.

I'm not going to use P&L either anymore, I had them rebuild a U2000 one time that only lasted 2 days before I had to send it back to them, the shipping gets rediculous when you have to do it over and over again.

yeah, what's the point of the guarantee if you have to pop for $30 to keep re-shipping. I don't understand the concept of doing a repair just to fix the bad part, and leave everything else untouched.

I especially don't understand why they'd install the wrong flyback in the first place. wow. makes me wonder how long this Polo 2 SVGA I had fixed by them will last (also a click-click-click situation.. if I recall it was something bad in the power supply on that one). it's sat for a year and a half, was supposed to be for a Dr. Face photo machine, but the computer software was no good. also sent a D9200 that was arcing and doing all kinds of evil shit, but mostly because the red and green were dead on it ... frankly I don't know which monitor's worse to work on, a D9200 or a Polo. :p

Chad did the works on my Polo. the invoice is probably like 2 feet long. j/k he does a lot, but as per what his instruction sheet says, you have to re-adjust all the color pots and brightness/contrast/screen to match your tube.

I almost had a heart attack when I plugged it in and saw all red.
 
What's Chads screen name so I can contact him about my polo? How much did he charge you?

*edit. Chad at arcadecup.com , okay and it looks like 135.00 for a Polo.
 
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What's Chads screen name so I can contact him about my polo? How much did he charge you?

*edit. Chad at arcadecup.com , okay and it looks like 135.00 for a Polo.

yeah, that's with flyback. I think it might be $40 less without? but chances are it needs a flyback. gotta be careful with the anode, you can short everything out if you touch that against something it doesn't belong touching. :) I usually wrap that up with bubble wrap as soon as I pull it.

I trust Chad's work, I think it'll be worth it. they're the best looking monitors.
 
mined turned out to be a cap with a broken leg on the power supply section, cap kit fixed it right up.
 
I've got one with no power and I have replaced the caps, flyback and HOT. Still nothing. I know I'm missing something. I need to dig into it again.

Jeff
 
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