[TechAssist] Re: RCA CTC169 proj. lense- is it algae or burn on CRT face? [UPDATE]
- From: "al m" <ampm@xxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Thu, 7 Apr 2005 10:06:51 -0400
Look in the front left corner by the audio board. If that's not it check the
box capacitor towards the front of the board in the center for solder and
internal break.
Al Marquardt
ampm@xxxxxxx
Al Marquardt Electronic Repair
206 W Main
Girardville Pa. 17935
----- Original Message -----
From: "Gary McCartney" <gary@xxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Thursday, April 07, 2005 10:03 AM
Subject: [TechAssist] RCA CTC169 proj. lense- is it algae or burn on CRT
face? [UPDATE]
> 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.
> --
>
>
>
>
> Gary McCartney
>
> McCartney Electronics
> Guelph Ontario Canada
> Est. 1984
> email: gary (at) number63.ca
>
>
>
>
>
>
>
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