[TechAssist] Re: RCA CTC169 proj. lense- is it algae or burn on CRT face? [UPDATE]
- From: Wayne Vanaman <Wayne@xxxxxxxxxxxxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Thu, 07 Apr 2005 10:32:33 -0500
Look for a white ground wire that goes from main chassis to the HV
splitter. Make sure the connections are good. I have seen breaks at
the connector, especialy on the splitter end.
This causes loss of video.
Wayne Vanaman
Omega Electronics
6904 W Fairfield Dr
Pensacola, Fl. 32506-3310
Wayne@xxxxxxxxxxxxxxxxxxxxx
WWW.PensacolaTVRepair.Com
850-456-5995 voice
850-458-6369 fax
Gary McCartney wrote:
> Thanks for everyone's time to reply.
>
> I put the lenses back on the CRTs and fired up the set. I can see the
> algae in the green CRT but the picture shines through it no problem. Red
> and blue are clear. I called the customer and explained the situation
> and the extra cost involved, but he said he was quite happy with the
> picture before he brought it in for repair and that he'll call me again
> if the picture becomes cloudy in the future.
>
> Unfortunately I now have another problem with this chassis. I believe
> there is a hairline crack in the circuit board somewhere because
> sometimes the set fires up without the CRT's lighting up. The filaments
> are lit and there is HV, and when I slide out the main board and twist
> it a bit, the CRT's come on. Have done a lot of soldering and I am now
> searching the board for cracks. I pushed once at the centre of the board
> and the CRT's came on but I can't get it to repeat, Arugggg. I did find
> the chocolate drop sydrome at the base of the vertically mounted board
> behind the tuner so I removed the board and cleaned it up- no change.
> Maybe the scope and schematic will find it.
>
> Will report back when I find the crack.
>
>
> Gary McCartney
>
> McCartney Electronics
> Guelph Ontario Canada
> Est. 1984
> email: gary (at) number63.ca
>
>
>
> My original message:
>
> I have a CTC169 projection in the shop that I replaced the HV splitter.
> Now I am cleaning the CRT lenses and I found the green one to have a
> smear look to it on the CRT face. The coolant does not seem to have
> bubbles or things floating around in it, but it looks like there is
> algae on the CRT face. Either that or the face is burned. I have
> included a link to a photo I took of the CRT so maybe someone will be
> able to tell.
>
> http://www.number63.ca/crt-lense.jpg
>
> I've only done a coolant job on one projection, that being an old
> Philips set, so I'm not real familar with the symptoms. I didn't notice
> any problem with the picture when looking into the lense before I
> removed it to clean. Is it worth ripping it apart to change the coolant,
> especially with RCA not providing new gaskets? Will I have to do it to
> all 3 CRT's to even up the brightness of the picture afterwards (red and
> blue don't have this problem but may look worse than a cleaned up green)?
>
> I've already told customer $250.00 to change the splitter. I'm afraid
> he'll want to cancel the whole job if I tell him more money to change
> coolant. How much should a job like this be worth, with new HDTV
> projections, plasma, etc entering the scene?
>
>
>
>
> Thanks for any replies.
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