vision pro 27" chassis removal help "red wire"

[draginit]

im new to monitors....out of the box my monitor(vision pro 27") is blowing the fuse right behind the power cord, im supposed to be sending in the chassis only for repair and was able to figure how to remove every connection except for one.  the mid-sized red one from the black box on the pcb board to the back of the tube. 
can someone tell me how to remove this??  ive called happ several times for assistance but i always get an answering machine.
-any help .....or assistance to solve the problem on my own even would be appreciated!!

[grantspain]

i guess you're talking about the ht lead that goes to the anode cap,to remove the anode cap you must first understand that it has a spring type clip that holds it to the tube(a y shape pin)therefore to remove it requires you to push one way whilst pulling the cap also you must be aware that the tube can(not always and depending the monitor make)still hold some voltage so don't be too concerned at a electricity spark,if you are worried about this you can discharge the tube by creating a short to the chassis earth.hope this helps

[vader]

Do a google search for " Discharging a monitor ".  If you are even remotely uncomfortable
doing this, take it to a professional or find a friend who knows how to do it.  The red
wire goes to flyback and anode.  Both are high voltage and can pack quite a punch even
after being off a while.  The circuitry should discharge automatically, but if your blowing
fuses, I wouldn't trust that to be working

[grantspain]

don't be too worried about the ht,i have to remove monitors 15 foot up hanging from a ladder and i don't bother to discharge first,i just keep one hand away from earth-but vader is correct if you are really concerned get a pro in to help(i mean professional not prostitute)

[draginit]

ok, my bad, i guess the tube would be the monitor...i got the anode wire off no prob!  to be more specific, its the mid-size red wire from the screen adjuster box to the back of the tube which i believe is the cap? it appears to be hardwired in from either end..
-the monitor i think is discharged as its never seen power yet, the fuse blows immediatly.

[vader]

don't be too worried about the ht,i have to remove monitors 15 foot up hanging from a ladder and i don't bother to discharge first,i just keep one hand away from earth-but vader is correct if you are really concerned get a pro in to help(i mean professional not prostitute)

whats wrong with the prostitute > 

[grantspain]

for a fuse to blow on power up usually means there is a dead short on the primary circuit of the monitor psu,either the bridge rectifier circuit or something to do with the degauss circuit,but if this monitor is new then its best to return it for a free repair,its useful to note that if you have damaged the degauss coil during installation then its possible this could be the fault but thats easy to prove by unplugging the degauss coil

[grantspain]

don't be too worried about the ht,i have to remove monitors 15 foot up hanging from a ladder and i don't bother to discharge first,i just keep one hand away from earth-but vader is correct if you are really concerned get a pro in to help(i mean professional not prostitute)

whats wrong with the prostitute > 
nothing they just charge more than a tv tech

[draginit]

its true, the monitor is under warranty which is why im turning it in for repair, but they only will take the chassis and not the whole monitor, which is why i have this predicament.   and i will have to get more familiar with all the components......unfortunatly i have to leave for work so hopefulyy i will be able to continue this troubleshooting tomorow.. thanks for the help so far!!

[Rickn]

From the little I have read, you have got some pretty good advise, likely the degauss coil.

Returning the board will likely get you back a board with a replaced fuse that blows up right away.
2  choices unplug the coil as described below, discharge the fuse by connecting a jumper to grond and touching both sides of the fuse (ocassionaly a filter cap may be charged and could give a nasty bite)
Now replace the fuse, do not reconnect the degauss coil.
Power up, if everything is fine it is the coil- see below.
If you have an ohmmeter here is what you need to do.
- Unplug the degausser from the chassis.
In case you do not know what this is, look on the back of the tube, there will be a "Coil", this looks like a heavy wire wrapped in black electrical tape.
It will have 2 single leads coming from it that plug into the main board, probaly close to the fuse that is blown.

Now connect 1 end to the ohmmeter to one of the 2 leads of the plug you disconnected (on the coil end -not the board), connect the other end to the metal frame or the ground braid on the tube.

If you do have a low resistance, the degauss coil has been pinched or cut somewhere- look at the area where the vertical frame brackets are bolted to the horizontal frame brackets.
If the bolts are too long, they may have cut the coil.

Find the cut and re-tape it, if the copper wires have had damage to the varnish coating it could be more serious. The tape should be a minimum of 3 layers.

In any case, want more help call me at the factory tomorrow- I will be glad to walk you thru..

Even though the Happ is not our monitor we are here to help.

Rick Nieman
Nieman Video Displays
Rick@niemandisplays.com
519-621-1722

[draginit]

wow, good stuff!,,, ok i examined the entire deguass coil thouroghly and could not find any damages,  my ohmeters batt. is dead so i will have to get one in the afternoon, but i powered up with degauss off and it still blew. but for good measure i will still check resistance.
-on the good side, i did figure how to remove the red wire, i found the small board on the back of the tube just slides off the pins on the back which now gives me access to the plastic piece holding it in.  but i dont want to send it out just yet, especially that its looking like i will fix it here.
-i see the leads from the deguass coil near the blown fuse but just to make sure, there are two more wires coming from the deguass coil just below the middle of the tube, black and white and a lot smaller, going to about the middle of the chassis board, does this effect the result any? need photos?
-i will probably take the offer to call for help!, but if the fuse is blowing with the deguass coil off, does that mean the board probly is bad?
-ok and one last thing, and its probly stupid but it may prevent clueless troubleshooting..the fuse-the one i took out is a slo-blow .315 250, locally around here i found fuses with these specs but do not have the same type of coil inside...the one i took out, its coil was considerably larger then the fuses im finding in local stores. is there a difference in slo-blow fuses or are specs,..all the same with different style coils inside?  thanks!!

[Rickn]

Yes there are differences in Slow,- blow, generally speaking in a monitor application, it is not critical.
Based on the amperage of the fuse, I am now thinking, it is not in the primary ; degaussing circuit??

Perhaps you may be best to pack the board up and return it,- too much paying around can void your warranty.

[grantspain]

rickn is correct about not mucking around with it,but you must have read that fuse wrong it can't be .315 amp(if you fart near that rating it would blow) its more likely to be 2amp or at most 3.15amp

[draginit]

grantspain, thanks. i did read it incorrect, i had to turn on a light to see it,    but it was 3.15... but of course the problem still exists.. based on the help you guys have given me i guess i'll pack it up n send it out.
thanks..hey, atleast, by luck, the original question was resolved here.

[draginit]

hey rickn, you were right, i got the board back with a new fuse and they told me they couldnt find anything wrong, so that justified a 40$ service charge even under warranty...mystyriously tho my monitor powers up now,,, but now i have no picture!!   any ideas anyone..  i did see the cpu bios screen flash just once and then it just keeps making the adjustment noises?.  i have another identical monitor with the same setup and it makes the same noises only it has picture(i understand that those noises are just made when adjusting the frequency or screen sizes n such right?..  the bad monitor will show the no signal screen if just powered but as soon as i turn on the cpu it goes black
(its not my video card as its new and i can get picture thru a regular monitor and my settings ar 800x600 16 bit colors 60hz, just like my other monitor...
any help on this one would be appreciated....