View Full Version : Sony KV-2643R score


freakaftr8
09-04-2019, 12:26 AM
Always wanted this one. Well I picked it up curb style tonight down the street in my neighborhood. A sign taped to the CRT says not working. Oh well. Loaded it up in the back of a Prius and drug it home.

Red gun is extremely tired. (Typical since its driven the hardest) Green almost there too. Blue is bright as day... Typical for these early 26 inch Trinitron CRTs.
Played the screen and drive game and was able to achieve a somewhat watchable picture.

I've changed a few of these Trinitron CRTs in the past. Never attempted a rejuvenation. From what I hear its usually a no go.

I'd have to tap it in to my SENCORE cr161 as it doesn't have the proper socket.

Anyone attempted a successful rejuvenation on one of these ever? I figure maybe give it a shot. Got nothing to lose. Trinitron CRTs are not happy when bumped huh..

zeno
09-04-2019, 08:21 AM
Never had a Sony rejuve & last more than a day. What works
usually is bringing up the filament. Jump out the low value resistor
in series with the filament up on the CRT board. Slight risk it will
short but you got nothin to loose.

73 Zeno:smoke:
LFOD !

freakaftr8
09-04-2019, 09:28 AM
True. I'll give it a whirl. Something tells me that these trinitron CRT's don't run at a standard 6.3 V between the heater pins.

maxhifi
09-04-2019, 09:33 AM
I attempted to rejuvenate a slightly smaller Trinitron from around that era, with the result being that it got even weaker.

How does it test with higher heater voltage? Maybe you can rig something up to run it like that, instead of the more destructive route.

freakaftr8
09-04-2019, 09:50 AM
I was thinking of measuring the H to H voltage across the pins on the CRT neck. This should hopefully give me an idea of what it normally runs at. Even though I cranked around the screen and BKG pots, there is no red BKG pot. This is of course the weak one.

maxhifi
09-04-2019, 10:05 AM
I was thinking of measuring the H to H voltage across the pins on the CRT neck. This should hopefully give me an idea of what it normally runs at. Even though I cranked around the screen and BKG pots, there is no red BKG pot. This is of course the weak one.

Does this set have filament voltage derived from the flyback? I think that's common on Sony TVs. If that's the case, make sure to check it with a VTVM or meter which has decent response up to 15kHz - an ordinary DMM may give a falsely low reading here, since most aren't accurate above about 1kHz.

freakaftr8
09-04-2019, 10:14 AM
Somewhere I have a Simpson model 303. IIRC, it worked ok, but had a sticky needle that I repaired some years ago. Would the DVM meter be a bad choice because of the frequency the flyback runs off for the ripple in the DC that DVMs cannot pickup?

freakaftr8
09-04-2019, 10:20 AM
And would I not be mistaken that this is literally the first 26 inch Trinitron introduced in the US outside the 21 inch?

If so, it's a score to me to add next to my 30 inch KV3000R.

maxhifi
09-04-2019, 11:08 AM
Somewhere I have a Simpson model 303. IIRC, it worked ok, but had a sticky needle that I repaired some years ago. Would the DVM meter be a bad choice because of the frequency the flyback runs off for the ripple in the DC that DVMs cannot pickup?

They run the filament off high frequency AC, not DC. A DVM usually starts to read low as frequency increases, getting grossly inaccurate by the time you get up to approx. 15kHz (flyback frequency)

Someone correct me if this era sony doesn't power the filament this way, but I'm pretty sure they do. At one point you could buy Sony specific brighteners, which were small high frequency transformers intended to boost the filament voltage off the flyback.

Here is an example https://www.ebay.com/itm/SPB2-ISO-Isolated-CRT-Brightener-for-Projection-Sets-9-to-35-/182417131479

Before proceeding, make sure the filament in this TV really is powered from the flyback

freakaftr8
09-04-2019, 11:52 AM
Sorry I meant AC. I'll take some pictures tonight, however the neck board states an R, G, B, G1 G2, I believe and H and another H. Assuming this would be a yes since there is no single pin H and a Ground for H (heater).

Only speculation here of course. I may have it backwards.

freakaftr8
09-04-2019, 05:45 PM
Ok so it looks like the voltages that drive the filaments are derived from the flyback. This would require me to put my Simpson to the task, if I can find it.

Here are the pics of the pinouts. I see the resistor on H1 tied to G2. It's a 220kohm. What's that about? Going to H2 looks like a sony proprietary inductor of some type. Dont see that changing voltage.

freakaftr8
09-04-2019, 07:02 PM
Well in a turn of events, I went ahead and cranked up the screen drive, sub brightness and sub contrast all the way up.

5 minutes in to a bright green raster, the red popped back!

Would this technically act like a rejuvenation when g2 voltages go extremely excessive?

I'm going to run this hard like this and then readjust the drives in a few hours. Maybe the ramped up g2 drives cleared this out?

freakaftr8
09-04-2019, 08:30 PM
So I backed down all the adjustments to where I started, and noticed the red is now being driven towards center. The screen pots for B and G are damn near at centerline to achieve a good white balance. I have the BKG at centerline as well on all three pots.

I cranked everything up to max until I had a bright green screen with retrace lines, then it went to yellowish then red popped in. I left it like this for 20 minutes and backed it down. Then let the set cool for an hour and it stayed the same.

Well see how long this lasts I guess. Picture is pretty decent now. Just a bit out of focus around the corners, and if I turn up the picture level too high, I get green or red smearing. (Weak CRT still I'm sure due to poor focus tracking on the corners and sides of the CRT which will not pull in). I suppose I can always connect my anode probe to see if I have close to 30kv.

freakaftr8
09-05-2019, 11:19 AM
Ok. I have been reading back on old posts.. There was a discussion between a few members about "Econoquick"..

This design is meant to leave a few volts at the heaters when the tv is off, not half, or full voltage. I have a feeling that Sony designed this device while the energy crisis of the 70's was in full swing. Sony probably knew something.. If they couldn't get away with half voltage cause of the guidelines introduced then, they could with econoquick. Something at least had to be there at all times to keep the cathodes clean. My theory is If a Trinitron CRT is put into use, it cant sit for a while dormant with no filament activity or the cathodes will become corroded.. The fact that people probably may have been worried about energy consumption, they may have unplugged the set often while not in use, possibly drastically reducing the life of the CRT. This set set for 25 years stated by the previous owner. She recalls that the picture was perfect before it was put out of service just to replace it with a projection tv. It sat in the garage since unplugged.

maxhifi
09-05-2019, 11:51 AM
Her idea of perfect, and your idea of perfect may not be the same thing. That said, it's great to hear you got it going!

freakaftr8
09-05-2019, 11:59 AM
Her idea of perfect, and your idea of perfect may not be the same thing. That said, it's great to hear you got it going!


Yeah, I thought of that too.. But before I started, there was literally no red and barely any green. Unfortunately I didn't snap a picture before I got to work of this condition. Everything was very "smurf like" faces were literally blue. But, yes I agree, it's hard to remember details with the human mind ranging that far back.. luckfully she told me she plugged it up in the garage to see if it worked to decide whether she would sell it or give it away and that's when se noticed the raster was all blue. Hence the not working sign on it.

Electronic M
09-05-2019, 12:12 PM
Ok. I have been reading back on old posts.. There was a discussion between a few members about "Econoquick"..

This design is meant to leave a few volts at the heaters when the tv is off, not half, or full voltage. I have a feeling that Sony designed this device while the energy crisis of the 70's was in full swing. Sony probably knew something.. If they couldn't get away with half voltage cause of the guidelines introduced then, they could with econoquick. Something at least had to be there at all times to keep the cathodes clean. My theory is If a Trinitron CRT is put into use, it cant sit for a while dormant with no filament activity or the cathodes will become corroded.. The fact that people probably may have been worried about energy consumption, they may have unplugged the set often while not in use, possibly drastically reducing the life of the CRT. This set set for 25 years stated by the previous owner. She recalls that the picture was perfect before it was put out of service just to replace it with a projection tv. It sat in the garage since unplugged.

Actually it is the opposite....If the heater is ran for a prolonged time without beam current the cathode will develop an emission blocking layer faster. This problem was especially an issue in early tube based computers where the heater of a triode in a latch might be ran full tilt for hours with no cathode current. Any CRT can "fall asleep" (develop an emission blocking layer on the cathode) from sitting unused for several years. A good reason to run your sets periodically.

My recommendation: if you are going to use it daily and want picture fast then the ecconoquick is good, but if you are not using it regularly unplug it or switch off the power strip it is plugged in to to reduce CRT wear.

Your chassis derrived rejuvenation is fascinating... I may have to try that on one of my Trinitrons at some point.

maxhifi
09-05-2019, 12:22 PM
Actually it is the opposite....If the heater is ran for a prolonged time without beam current the cathode will develop an emission blocking layer faster. This problem was especially an issue in early tube based computers where the heater of a triode in a latch might be ran full tilt for hours with no cathode current. Any CRT can "fall asleep" (develop an emission blocking layer on the cathode) from sitting unused for several years. A good reason to run your sets periodically.

My recommendation: if you are going to use it daily and want picture fast then the ecconoquick is good, but if you are not using it regularly unplug it or switch off the power strip it is plugged in to to reduce CRT wear.

Your chassis derrived rejuvenation is fascinating... I may have to try that on one of my Trinitrons at some point.

Almost every TV I've had the pleasure of working on, which has sat a long time since last being used, had a dramatic increase in emission, and stabilization of color tracking once I let the CRT sit at 8-9V for a while. Sometimes it stays that way, sometimes it drops right back down after it has been off a while.

freakaftr8
09-05-2019, 12:35 PM
Absolutely agree. Most of the vintage color sets I've picked up showed weak sleepy emission. the 8v overnight trick brought most back to life into the green.

As to Electronic M, yes I always thought that any heater without cathode use causes oxidation. I just dont understand why Sony would make a big deal of econoquick if the SS circuitry was a 8 to 10 second wait from dead cold anyway.

A far leap from a non instant on full vacuum tube tv that took 30 or more seconds to produce picture, in which yes, instant on reduced CRT life and vaccum tube life as well.

zeno
09-06-2019, 04:11 PM
A few notes on all of this.
Econoquick is just a fast warm up CRT. No STBY voltage.

Almost all SS sets WITHOUT a power transformer use a flyback (FBT) winding
for the CRT filament. Some sets ground on end & others "float" it at apx 130V.
This is to keep the F & cathode close DC wise to reduce arking & H-K shorting.

Service notes.
Always look for cold joints especially if the set has a PCB for the CRT socket.
Early RCA in line CRT sets used a spring contact socket. Many had toasting & went intermintant ( RCA, Admiral, Maggy, Sears/Warwick ). The plastic key on the CRT would melt & the contacts burn. Repair was a new socket, remove key, clean & bend F pins out slightly then put the key back on.

Sets with H-K short & grounded F.
There was a rash of Sanyo built Sears with Sylvania jugs that shorted H-K.
This coinsided with mass failures of the Z0064 HV rect, divider that kept us quite busy ! They used a grounded F configuration. Repair was to isolate the
F from ground ( cut etch & run a wire). Place a 1.5 meg resistor between
the shorting K & f. Also add IIRC a .01 cap from the K to ground. This made the set usable again but you could still see when it shorted in the pix.
$50 sure beat a new set for the customer !

Low E. Caution some risk !!!
You should use a scope for this ! Measure the P-P filament first. You want to
increase the F about 20-25%. Most sets have a low value resistor in series
with the F ( apx 2 ohm 1 W ). Jump it out & watch the scope for the change in P-P.
Early sets had an "open" FBT with the core for the pulse winding exposed.
Try adding a turn to the F winding. Use the scope to watch the P-P. Again not
a perfect solution but sure beats a new CRT !

Instant on.
One of my biggest beefs. Instant on is a killer especially on all tube TV's from
all MFG's. All of us are quick to condemn it. BUT on SS sets its a different
story IMHO. Ask anyone here what CRT holds up best from the 70's. 90%
will answer Zenith chromacolor jugs. The flat chassis & E line CC2 sets both
had instant on............

I am tired, nuf sed fer now
73 Zeno:smoke:
LFOD !

freakaftr8
09-06-2019, 05:52 PM
Well I found a 220k ohm resistor on the H2. There is an H1 and H2. Obviously I cant read with a DVM. Could you elaborate on this low value resistor jumping?

Essentially increasing heater voltage it sounds.

I still have a focus issue on the outside perimeter of the CRT I cannot achieve with dialing focus around. also blue and red smearing from weak R and B emission although it retains good brightness and contrast even with the smearing with my chassis derived rejuvenation. lol

I know it's most likely a weak crt, just surprised it can retain a really bright raster with quite a bit of contrast, not like the usual Trinitron weak crt.

But it does exhibit the smearing as contrast level goes up. And quite a bit out of focus around the perimeter.

freakaftr8
09-07-2019, 02:44 AM
Ok. I gave my homebrew crt rejuvenation by cranking up R,B,G drives, screen g2 and sub brightness and sub contrast one more go just for the heck of it to try to bump this sleepy CRT awake since I wasn't happy about the red and green smearing issue I was having since the picture level had to be at a less than adequate level to make the smearing livable. I figured what do I have to lose, after all it was free.

So for 2 hours I let it cook like this in the garage to the intro to Family Guy where I saw it the worst.. After about 20 minutes I saw some red background flickering, then it gow worse. All the sudden the red bloomed in like crazy, then faded back to normal.. The red smear became green. 5 minutes after that, the green did the same thing, then the green smear dissapeared.

So I backed everything back down to midrange after letting it cook for another 1.5 hours.

What I found is if screen G2 is all the way up, sub brightness all the way down, this eliminates 90 percent of the color smearing.

Still convinced its a weak crt.

Btw, anode HV is right at 28.9KV. Reference decal says 29KV
I also looked over the neckboard for solder cracks.

zeno
09-07-2019, 11:14 AM
Wrong resistor. It should be just a few ohms. If not on CRT PCB trace the F
wires back to the FBT. It also may not be there at all.

Well I found a 220k ohm resistor on the H2. There is an H1 and H2. Obviously I cant read with a DVM. Could you elaborate on this low value resistor jumping?

Essentially increasing heater voltage it sounds.

I still have a focus issue on the outside perimeter of the CRT I cannot achieve with dialing focus around. also blue and red smearing from weak R and B emission although it retains good brightness and contrast even with the smearing with my chassis derived rejuvenation. lol

I know it's most likely a weak crt, just surprised it can retain a really bright raster with quite a bit of contrast, not like the usual Trinitron weak crt.

But it does exhibit the smearing as contrast level goes up. And quite a bit out of focus around the perimeter.

freakaftr8
09-07-2019, 11:26 AM
The H1 and H2 wires connect directly to the flyback via pigtail connector.

freakaftr8
09-07-2019, 08:13 PM
Ok. Found out my HV probe is messed up possibly. what I thought was 28.9k is actually reading 15k. It's a bk precision HV-44 probe. The damn needle adjustment was cranked up and didn't realize it. Once I calibrated it back to zero, this is what I'm seeing. Doubt the tripler is actually only putting out 15k when the set requires 29kv. Is there something I'm missing?

Could be my meter. Bout to go check some vintage sets of mine to be sure.

freakaftr8
09-08-2019, 12:44 PM
Huh.. My probe measured a Zenith I have the back off at 24kv. Tvs rated at 25kv. Now I'm wondering what's up. Maybe this is the reason for such poor focus? But still convinced the crt is worn out. 710AB22 is just one of those duds.

zeno
09-08-2019, 03:23 PM
Huh.. My probe measured a Zenith I have the back off at 24kv. Tvs rated at 25kv. Now I'm wondering what's up.

Strange. Cant imagine getting a decent pix at so low HV. Maybe you are not quite hitting the metal ? Fold up the boot & be sure. NOTE most Sonys have
a coax HV lead. The outer is HV & the inner goes to the H-STAT control.
The inner makes contact to a small spring on the CRT. If you dont use the
removal tool you can loose or bend the spring. Remove the 2 HV claws
first then pull strait off. Dont use the bend & rip off method !

73 Zeno:smoke:
LFOD !

freakaftr8
09-09-2019, 10:05 PM
Think my probe is shot. The needle is sticking. looking for a replacement. What's the best way to adapt my sencore cr161 to read how bad this CRT actually is? Thinking of using some wires and alligator clips. What do you guys think? I know I need heater, ,R,G,B, g2 and g1 and ground right? I'm not aware of the stripe colors on the jig? Do I need to use those or just the common colors?

Its putting out a mediocre picture with sub brightness down, and screen drive turned all the way up surprisingly. just out of focus around the outer areas. Wont come in at all. Center of the raster is clear as a bell and the smearing is gone while over driving the G2.. But I can tell the tube is weak.

I know now that the filament voltage is 6.3v ang G1 is 50v. Would use a socket CR-37 but I dont have one.

freakaftr8
09-10-2019, 01:59 AM
Ok so heres my setup. I used an old BK 465 to run the juice to the filaments. I unplugged the AC filament feed from the socket on the mainboard, then connected it to the BK via one of the sockets, and monitored by DMM. Honestly there is little difference besides some of the color saturation gets a little better and whites stand out more and gets brighter but nothing huge. Focus still sucks wither it's set at standard 6.3v or up to 8v.

maxhifi
09-10-2019, 09:35 AM
Ok so heres my setup. I used an old BK 465 to run the juice to the filaments. I unplugged the AC filament feed from the socket on the mainboard, then connected it to the BK via one of the sockets, and monitored by DMM. Honestly there is little difference besides some of the color saturation gets a little better and whites stand out more and gets brighter but nothing huge. Focus still sucks wither it's set at standard 6.3v or up to 8v.

Sounds to me like you should dump this thing and focus on your CTC39 :)

freakaftr8
09-10-2019, 11:17 AM
That's probably what I'm going to do, however it makes a nice test jig for some crazy ideas and figuring out how to adapt a CRT tester via homemade connections and rejuvenation attempts. Figure of I was going to waste a CRT on accident, this would be a good learning curve. It was free after all. All in the name of science..lol. I'm going to use the chassis for an RGB mod possibly for a NEO GEO arcade unit.

Electronic M
09-10-2019, 12:11 PM
One way to make a universal universal (as in should work on any tester and CRT) is to find a junk scope that uses the same base as a 10BP4 (and 90% of CRTs pre1960), Rob the base off the scope tube and populate clip leads onto the pins for the gun of a 10BP4. Nearly all testers had settings and socket to test a 10BP4 so if you build a socket that adapts that to clip leads that socket will adapt almost any tester to almost any CRT...It will only one gun at a time, and you'll have to label your clip leads and consult the pinout of the tube you want to test, but it sure beats having no adapter at all.

This is exactly the universal adapter I made when I decided I wanted one. I color coded my leads based on the color code for the red gun leads in a color CRT, and have a good enough handle on which of those are what element that I can hook them up to a monochrome the (which used a different color code than a color tube) if I know or can see the pinout through the glass. Most testers only need 2 H leads, a K, a G1, and a G2 to work.

freakaftr8
10-06-2019, 12:43 AM
Got bored today while waiting on some caps on order for my CTC-16..

With the junk CRT tester I have connected to the heater voltage on this Sony, I performed something that came to mind.. A little experiment of sorts.

I notice that when I jump the voltage up to around 8V, I get green saturation that seems to lack at 6.3v. With heaters running at normal voltage I get green smearing to the right and in kind of reddish whites.

I would jump the CRT voltage to around 12 and without hitting the tube with a rejuvenator, I would hold it there in tap the back of the neck well I bring it the heater voltage back to 6.3v. I did this roughly 10 times and when to hold it at the 12v for about 10 minutes each time. And every minute I would tap the neck with the handle of a screwdriver. (This is because every time at high heater voltage, the green would flicker in if I tapped the neck)

Every time I would bring it back down to 6.3, the picture Room go back to a murky reddish color with greeny whites with some smearing. After about the 5th or 6th time running at 12 V I had a massive amount of green saturation, Then the picture went bright green with retrace lines. At that point I brought it back down to 6.3 and the green screen with the retrace slowly faded back down. Suddenly I had the picture you see here. No more blur Or smearing at all. On a neck of the CRT by measuring a 143 V on the green where I had a 111 V before . Blue and red
measure about a 148 V.

Is this the AKB circuit balancing the guns? I didn't thing. Set of this vintage has auto kine bias.. But man, surprisingly it looks way better. I had to rebalance the drives to compensate for the sudden green gun improvement. Red seems better too from early on with the crazy chassis derived rejuvenation I did. Lol. I'm close to dumping this thing off to e waste, but thought I'd have some fun with it. Now it looks really good...

Wonder for how long. It's been on all day and still looks surprisingly good. oh well.

zeno
10-06-2019, 09:02 AM
Can almost guarantee this set dont have AKB. It has adjustments.
Besides Sonys AKB will cause the video to blink on & off with a jug
as soft as this one especially when cold. I asked Sony why once &
they said they didnt want sets with soft CRT's cause they are like
billboards screaming "Sony pixs suck!".

73 Zeno:smoke:
LFOD !

freakaftr8
10-06-2019, 02:30 PM
I kinda figured. that system was not implemented till the late 80s early 90s.

Left it on all night again. Still really good! Drastic improvement from when I first got it. Looks almost as good as the CRT on my Sony KV3000R (which is perfect).

Neat technique I came up with. Possibly overheating the cathodes temporarily in bursts may have burned away some of the contamination on the cathodes. of course this is purely speculation.

Lol kids playing Donkey Kong Super Nintendo.

freakaftr8
10-07-2019, 01:13 AM
Maybe I did something close to what this VKer did except I used no transformer on the G1 circuit since the G1 was already activated with the TV on during my process.

http://www.videokarma.org/archive/index.php/t-257458.html

It appears that the Trinitron cathodes, being paper thin, can actually be cleaned by non destructive CRT whacking with a full on rejuvenation, but merely by burning the cathodes clean with extreme heater voltage. In sessions.

Not sure how or why, but heck, it worked, and unlike Alastair's design, I was actually seeing this happen since it was on ar the time.

freakaftr8
10-07-2019, 10:08 AM
Btw. Never posted a pic of how it looked when I got it. This is after I turned down the B drive. It was really blue and looked nasty.

freakaftr8
10-07-2019, 11:02 PM
I have however, have really crappy poor outer focus. Any ideas? Possibly a poor flyback or divider block?

Btw, heres a shot of the KV3000R in the same room.

freakaftr8
10-10-2019, 12:12 AM
Quick question as to screen readings? Is this an inclusive test to show how much the CRT is biasing each gun? I've always thought the closer these readings are to each other, the better the CRT is. Am I correct?

It seems that the longer I run this thing, the better the picture is getting and these readings are coming closer together. in the last day I've had to back off on the green and red a bit.

freakaftr8
10-10-2019, 02:52 PM
I tested the screen grids on a small 14 inch Trinitron CRT computer monitor I have here at work that's built into a CNC machine. They range all from 131v to 138v. Pretty close to each other. This CRT puts out a great picture. Guess that answers that. If one is low, that's the cathode in trouble.

freakaftr8
10-11-2019, 11:34 PM
Ok.. so that outer focus problem just cured itself. Well I mean it's alot better.. it's been slowly getting better over the last 2 days.

rpm1200
10-17-2019, 12:08 PM
And would I not be mistaken that this is literally the first 26 inch Trinitron introduced in the US outside the 21 inch?

No, I think the KV-2601 was out before this one, that one was more stripped down (it's not even a remote control set). However this is the one of the Poltergeist TVs, which is pretty cool.

freakaftr8
10-17-2019, 12:48 PM
Lol I did this. I was bored. Even the time in the clock is matched. First pic is from the movie, second is mine.

freakaftr8
10-17-2019, 12:51 PM
Btw, CRT is still holding strong. Had to make a correction on the red and back it off slightly.

freakaftr8
10-23-2019, 01:26 AM
Still looking like a Trinitron should look. Ran about 3-4 hours a day. Picture seems really good after spending a few hours with convergence and pincushion corrections.

Electronic M
10-23-2019, 09:27 AM
Pretty impressive it is still going that well.

I may have to try your trick if the intermittent smearing green and red getting WAY overdriven till the protect circuit kicks it off isn't a solder issue on my Super Fine Pitch Wega... Slapping it on power up seems to reset the problem...If it weren't a 200lb monster I'd have pulled the back already.

freakaftr8
10-27-2019, 07:54 PM
Well all.... I ran into a problem. my 6 year old dumped gorilla glue all over the top of the tv. It came off the wood with some goo gone but it took the paint clean off the top of the crt bezel surround. it's like a matte grey. I noticed my KV-1510 has the same color. So appears the CRT bezel on my RCA CTC39. Anyone ever repaint the grey on a CRT bezel let me in on what the paint code or color I should look out for? I'm thinking about taking a piece off and going down to a paint shop to have them match it. I hate to have to paint the whole surround, hoping to just repaint the top. Already tried this with a Ford color I found in the garage from a previous car repair. The color almost matched but was too light and of course gloss. This appears to be flat or matte finish.

1st pic is the KV-2643R
2nd pic is the KV-1510.

Thanks all

Electronic M
10-27-2019, 08:26 PM
Auto parts stores seem to have the best selection of grays...it will all be in gloss, but if the color match is good you could follow up with a more mate finish of clear lacquer.

freakaftr8
11-08-2019, 12:44 AM
Still going strong! 2-4 hours a day use.

Popester
11-08-2019, 04:52 PM
I really like that clock feature on the tv. I like that green glow. Can the clock display be dimmed or brighter? I have Sony Betamax decks that can have the display on a dim or bright setting with a switch.

Popester
11-08-2019, 04:55 PM
Do you use the lumisponder feature? I never liked how low the contrast looked with them on. Probably a gimmick Sony used to sell tv's. I know most of the manufactures were also using the feature. I always disabled it on my sets.

freakaftr8
11-08-2019, 11:01 PM
No unfortunately the clock and a channel display indicator are not adjustable. The Lumisponder is kind of cool. But yes it does dim the picture quite a bit however where I have it placed a does do a pretty good job sense the light from the front door shines directly near the TV during the day and brightens the room the TV goes to full brightness and contrast that at night it dims about 60% of it. Although it is easier on the eyes it does get a little too dim for my taste so I really don't use it.

freakaftr8
11-12-2019, 06:17 PM
Aaaaannnnnddddd. That's all she wrote folks. Last night the red started to smear and noticed the red BKG getting a reddish hue to it. Green gun going south for the winter (or forever)... white background on like games make the white go florescent green. Oh well. Maybe I'll try to whack it again.

Electronic M
11-13-2019, 07:54 AM
I had a similar issue on my 2004 super-fine-pitch HD Trinitron. Gray scale would intermittently get too red red and green would smear and eventually it would shoot so red it would trip the protection circuits and shut down....a smack before it reached shut down would usually bring things back to normal...got sick of the problem and reflowed the solder on the red amp IC and heatsink and it hasn't misbehaved since.

Popester
11-14-2019, 07:36 PM
Sony used to make new jugs in San Diego. I think even some of their models might of been made there but I did know that in the seventies you get get new jugs from Sony. I wonder if you could find one to replaced it. I think yours is tired 😓. Such a nice console too. Maybe you could find a jug somewhere.

freakaftr8
11-14-2019, 11:50 PM
Yea I wish. I'm in California and you think there may be a stockpile of these somewhere considering how many 710AB22 CRTS were replaced in the 80s and 90s to the more robust A67JHG00X and A67JHG01X. The red gun is done now. Tried my trick and something in the neck arced bad. Now it's a dud. So I did a proper send-off and sent 20v to the heaters. Lol. It was a lightshow! I'll be storing it in the garage in case I happen to come across a beat up set with a good jug. I found one on OfferUp in Oakland, bit the person wont get back to me. It's the KV-2649R. the stereo model that was also featured in Poltergeist. its beat up thou.

However on a good note, I get to play with a dead PVM-1953MD I just picked up. Should be fun..

Popester
11-16-2019, 09:48 PM
Don't give up on finding a jug. There has to be one out there waiting for you to get. These were very nice tv's in there day. They only thing about the Sony CRT's is that they tended to have a short life span. It's also to bad that we don't live in an era anymore where a rebuilt would be available. Good luck. That set would be worth hanging onto for a jug.

freakaftr8
10-18-2020, 03:27 PM
Bringing this one back from the dead. New CRT installed from a trip to Los Angeles to pick up a roach infested KV-2670R. Swiped the good A67JHG01X and viola beautiful picture after some convergence and purity tweaks of course. So it's alive again! But looking to bypass the tuner, imI started a new thread on here.