Monitor heads please help!?

[paulcan69]

Hello all,

Had a monitor go down last night, my 9000a the only one which has never needed a repair, until now.

Right here goes, easy for some of you I'm sure, please try to help me quick as I'm itching to get it up and running, I had just put Ghost's and Goblins in there a few days ago and miss it already!

Classic 9000 series style of fault, picture goes then I can here a faint crackle/bubbling!!

When I checked the large white resistor was soooo hot it was almost on fire, you could see the outer core of it was melting, and yes I had to touch it and it was very hot!

So like all 9000's and following the repair logs for these LOPT and HOT.

Just now I removed the LOPT and sure enough it has a dirty great big crack around in and something has oozed out

not sure of the technical term there....

So my question is this, I have another LOPT from a 9000 (but not an 9000A) and I know I can use this IF I cut pin 2, question is which pin is pin 2?

Lastly does this only apply to the HR replacement ones, as mine seems to be an original 9000 LOPT

(But I know this one is good as I removed it from a fully working 9000)

The part no.?? on the broken one from the 9000A is:-

072-011 1E2109

The part no.?? on the one I have to go in as a replacement is:-

072-011 1F1036

Is the last bit a batch no. and it won't matter or is it all a part no. which needs to be the same??

Just for ref the one that's was in the 9000A (with the crack in it and is broken) has all it's pins intact no-one has cut any of them.

Sames goes for the 9000 LOPT

Please help

Any advice is warmly welcome!

Rav? TB2000? Tim? Ordy? 69er? Ace? Zektor? P-man? (I forget who's on which forums)

One of you please save my evening!

I could have this back together in a matter of minutes, I have a HOT ready to go in, just need a nudge to know whats right and safe!

Thanks y'all

paulcan692011-04-26 20:09:22

 

[Macro]

well, if you use your meter, pin 2 should connect to GND on the PCB (if that helps)

 

[paulcan69]

Ok just used my head to find pin 2, I looked at the 9000 schems as 9000a I can never find, but at least I can see which pin is pin 2 on a Hanty LOPT.

Ok question is do I cut the one on here, or first fit it but insulate pin 2 and obviously don't solder it in and check it works first before I cut the pin off and can't go back?

If my "replacement" LOPT was an HR one I would just cut it, but I'm scared incase this one I have is a drop in and play replacement?

I've been told that the reason pin 2 needs to be cut is that if not it will have a massive short to ground! What does that mean that the chassis metal goes live?

 

[paulcan69]

Ah Macro thanks bud!

Sorry let me get it straight...if I meter pin 2 on the 9000a chassis it should go to gnd?

Sorry to be dumb I see where your going but can be slow to grasp it!

 

[paulcan69]

Ok Macro from what you said I did the following:-

Meter my newly found Pin 2 on the 9000a chassis and sure enough it goes to GND

Then looking at a 100% fooked/dead 9000 chassis I have I metered the same pin and it doesn't go to ground!

This makes me think I will need to cut pin 2 on a originally 9000 LOPT for use in a 9000a

Agreed anyone/Macro?

Thanks for this, this is really helping me go the right way I feel.

 

[paulcan69]

Lastly please, please can someone put up the 9000a schems, someone must have them I would pay £15 to have a "good" copy of those, everytime I need info on this monitor I run into trouble with lack of schems.

This monitor seems to be a bast*rd child of a 9000 but with some 900e style changes to it???

Does anyone know the story with these, was it a proto that never really got rolled out?

Ta

 

[paulcan69]

Well that didn't work, the second I turned it on, it tripped the garage fuse

Oh dear!!

May just need a 9000 chassis now!

(Although it didn't blow any of the quick blow fuses on the chassis board?)

Oh well live and learn.

I'll have more of a look at it tomorrow night.

 

[paulcan69]

Never mind I did it, and killed it - I think!

Got a Polo 20" chassis from Mo @ Videotronics now all good!

Had to remove the ISO as Polo runs on mains, + swap Blue and Red around as Hanty changed that after the 9000 series.

 

[Macro]

oh dear, I tried it with all pins connected originally and it was just dead the way it was with the blown lopt - the big resistor getting hot.

spoke to an engineer at Hanty who told me to cut pin two, as otherwise it grounded out one of the coils (hence the bit about ground) - so did that, and it's still working fine.

sorry it didn't have the same effect on your PCB!

 

[paulcan69]

I think it should have worked maybe when it went down in the first place it had other issues anyway, ah well win some loose some lol