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How to Replace CRT Coolant in a Blurry Rear Projection TV   Goto page Previous  1, 2  
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coachmatt42



Joined: 30 Jan 2010
Posts: 6
Location: Atlanta
PostPosted: Mon Feb 01, 2010 6:26 pm    Post subject: Reply with quote
Jesse Mack wrote:
If you have coolant leaking into the yoke windings you will start arcing between the yoke and the crt and will not be able to visably see the arc.
Only way to check this is to remove the yoke and clean crt and yoke - you usually can see a possible burn spot on the yoke. Sometimes this can be corrected with silicone if it has not progressed to far.

Hope this helps.

Jesse


k thanks Jesse. I am gonna try that and see what happens. I'll let you know the status tomorrow....
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sheltronics



Joined: 23 Feb 2010
Posts: 2
Location: utah
PostPosted: Tue Feb 23, 2010 11:08 pm    Post subject: crt coolant Reply with quote
You really need to take the 4 screws out that seal the crt to case. Buildup needs to be taken off the crt front with a razor for best pic.I have done about 50 or so of these and the only way to do it is the right way.
Jesse Mack



Joined: 22 May 2008
Posts: 600
Location: The Last Frontier
PostPosted: Wed Feb 24, 2010 12:31 pm    Post subject: Reply with quote
The buildup is an algae and is removable with denatured alcohol per philips own service literature and the alcohol also kills the algae.

Method given IS the right way per philips own service literature.

The only valid reason to replace the crt to chamber seal is if there was coolant leaking prior to repair. Then both seals should be replaced.

Jesse

PS: You may have done 50, I have done 150 and have never had a rework. Mr. Green
sheltronics



Joined: 23 Feb 2010
Posts: 2
Location: utah
PostPosted: Wed Feb 24, 2010 8:38 pm    Post subject: I am sorry Reply with quote
I was told by my mentor to always replace both seals as i looked up to him.
I never had a guide to go by. Again sorry
Jesse Mack



Joined: 22 May 2008
Posts: 600
Location: The Last Frontier
PostPosted: Thu Feb 25, 2010 12:10 pm    Post subject: Reply with quote
No reason to be sorry, I could only wish that all of the employees I have had had your attitude I would consider myself lucky.

Jesse
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seanpearson



Joined: 23 Apr 2010
Posts: 1
Location: st. louis
PostPosted: Fri Apr 23, 2010 8:54 am    Post subject: Reply with quote
Hi there... How long does the coolant change usually take per CRT? I plan on doing the green and blue tomorrow, and just curious about how long it will take. Im very proficient working with this tv (Magnavox 51mp392h), as i have already replaced the convergence ICs.

I was thinking it would probably be like an hour per CRT just to be safe and make sure they get cleaned properly and make sure they dont leak...
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