The elusive Indextron

[dinorhino]

Hi there, it's been a while since I've checked in on this thread. The indextron is still disassembled on my bench so I took some pics for you. I haven't attempted to power it on since last time.

I didn't replace every capacitor on either the diversity unit or the tv unit, I left the really tiny non polar caps and really large high voltage caps, maybe this was a mistake. I did test every original cap with a ESR meter and they all tested well within spec.

The diversity unit does operate the relay when powered on. I'm using a 16V 4.5A laptop charger to power both the diversity unit and tv. The voltage drops to ~14v under load IIRC. I had wondered if this was enough to power it, I don't have a good way of measuring the current draw but the charger brick stays relatively cool.

I haven't actually tested the audio outputs yet to see if the tuner is functioning...

I want to finish this project to make room on my bench, I know if I put it back together now I'll probably never come back and finish it LOL

HelloVoltage, any information you can give me on what you had to repair and replace on either unit, please share! I'm a novice when it comes to CRT's and electronics repair in this context so what you might think is not worth mentioning might be very valuable to me! Thanks for the help so far.

Here's some pics
https://drive.google.com/file/d/1uMp...ew?usp=sharing
https://drive.google.com/file/d/158Y...ew?usp=sharing

[jhalphen]

Hi to all,

Hope i'm not "broadcasting old news" but found this Sony KVX-370 Indextron demo on YouTube (7min 13") from 4 years ago.
Guy purchased a NIB unit & recapped it before any tryout and it works.
Good views of the internal construction & circuit boards.
Still photos would help documenting future repairs.

https://youtu.be/9mGqyCtXyhA?si=lN7bm4yUzoPKERts

Best Regards
jhalphen
Paris/France

[HelloVoltage]

Originally Posted by jhalphen

Hi to all,
Still photos would help documenting future repairs.
Paris/France

What photos do you want of the 370/kv-4sv?

I thought it been well covered by now.

[jhalphen]

Hi to All,
Hi HelloVoltage,

I'm the person who gave everybody the KVX-370 service manual about 20 years ago.
The B&W Scans (other than schematics) are of very poor quality with no grey scale.

I was just suggesting that color snapshots of the hi-def YouTube video would be a good adjunct to the service manual.

Best Regards
jhalphen
Paris/France

[HelloVoltage]

jhalphen

do you know if any scans of the boards have been made with part overlay? if not I can. Is there a preferred software for such ?

[HelloVoltage]

are there archival scans of any of this "out there" that any of you know of?

[jhalphen]

Hi to All,
Hi HelloVoltage,

Documents shown in your photo are not available anywhere (to my knowledge) as good quality scans.

Overlays: i just looked at the service manual, component placements are identified on the various printed circuit board.
not great quality, but usable.
Sorry, can't post an example because of ridiculously low forum size limits (and i'm too lazy to subscribe to an outboard hosting service).

Creating new overlays for the KVX-370 would be a considerable task and not necessary (in my opinion).

However, i have never seen any tech data concerning the car Indextrons (XKV-55, ...) or diversity receivers.

Best Regards
jhalphen
Paris/France

[mbates14]

Originally Posted by jhalphen

Hi to All,
Hi HelloVoltage,

I'm the person who gave everybody the KVX-370 service manual about 20 years ago.
The B&W Scans (other than schematics) are of very poor quality with no grey scale.

I was just suggesting that color snapshots of the hi-def YouTube video would be a good adjunct to the service manual.

Best Regards
jhalphen
Paris/France

Would be amazing to have better scans of the SMPS circuit.

[jhalphen]

Hi to all,
Hi mbates 14,

Photos of the Sony KVX-370 SMPS PCB.:

worth a shot : try posting a request on ARF's TV section and flag @AC.
Andy is a world class expert on KVX-370 indextrons, he's repaired many over the years for various collectors including myself.

ARF TV :
https://antiqueradios.com/forums/viewforum.php?f=3

If you ask nicely, he may have some archived photos of the PCBs while he was repairing them.
He departed VK a few years ago for personal reasons.

I've never managed to find an original Sony paper copy of the KVX-370 service manual.

Looking on Buyee Japan shopping site for the KV-4SV2 yields this :

https://buyee.jp/item/jdirectitems/a...n_DirectSearch

Good Luck!

Best Regards
jhalphen
Paris/France

[HelloVoltage]

[QUOTE=dinorhino;3261915
I left the really tiny non polar caps and really large high voltage caps, maybe this was a mistake. I did test every original cap with a ESR meter and they all tested well within spec.
[/QUOTE]


My large caps leaked out fierce on the first diversity unit I opened up, most trace repair was in that relay area.

[QUOTE=dinorhino;3261915
I'm using a 16V 4.5A laptop charger to power both the diversity unit and tv.
[/QUOTE]

I use just the 12v rail of an atx power supply. (amperage permitting)That should be enough as these are automotive electronics.

Originally Posted by dinorhino;3261915
HelloVoltage, any information you can give me on what you had to repair and replace on either unit, please share!
[/QUOTE

Here's some pics
https://drive.google.com/file/d/1uMp...ew?usp=sharing
https://drive.google.com/file/d/158Y...ew?usp=sharing

I'm making a full repair video for an xkv55. Frown on the poor packaging on this one. only indextron to suffer shipping damage so far from japan. bezel cracked. So far besides caps, I see at least one burnt out resistor. Waiting for mouser delivery.