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 Post subject: DiscoVision Philips Code Test Disc
PostPosted: 20 Nov 2020, 03:30 
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I recently purchased everything a former LD tech owned related to laserdisc. Included was this Philips code test disc. The best part: it is a box that Magnavox shipped on July 29th, 1981.

The disc contains test frames as well as excerpts of what I believe is Sting, The (1973) [11-001].

I am assuming this disc was made to either check or test players with Philips code before it became part of the Laservision standard? Does anyone happen to know more about this?


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 Post subject: Re: DiscoVision Philips Code Test Disc
PostPosted: 20 Nov 2020, 03:37 
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Blam1 will know more about this, possibly happycube also?????
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 Post subject: Re: DiscoVision Philips Code Test Disc
PostPosted: 20 Nov 2020, 04:06 
Jedi Knight
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The Sting was also used for something else, right?
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 Post subject: Re: DiscoVision Philips Code Test Disc
PostPosted: 22 Nov 2020, 07:06 
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It's basically the very first test/alignment disk. The "Philips Code" bit means that it has the VBI data used with all LD players other than the PR-7820 (which used MCA Code) - most disks through the 80's had both codes, and only early industrial titles (like 79/80 model year GM disks) had just the MCA code.

Also, any other interesting finds?

(Snide note: GM apparently was so used to poorly made disks that they switched to Technidisc soon after Pioneer US got it's act together.)
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 Post subject: Re: DiscoVision Philips Code Test Disc
PostPosted: 23 Nov 2020, 23:36 
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Thanks for shedding some more light on that happycube. :thumbup:

Reference discs:
Yamaha: CAV Test Disc [LD-05]
GGV1003, GGV1012, GGV1015
Part 2 and 3 of the LD Tuning Fork videos you already uploaded
Sony Reference Disc https://www.lddb.com/laserdisc/submit/5 ... nce-Disc-7
CD test discs (none Pioneer though)

I'm not by the parts currently for part numbers but I know I have:
GGF1067
GGV-129 (finally!)
Various replacement ICs
Various belts
Various NOS spindles
A NOS pickup assembly

Oddities:
SuperBox II (http://www.superbox.com/) and accompanying NPS disc.
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 Post subject: Re: DiscoVision Philips Code Test Disc
PostPosted: 24 Nov 2020, 01:36 
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Great score! The GGF1067 remote is really hard to find, but at least the codes have been copied off.
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 Post subject: Re: DiscoVision Philips Code Test Disc
PostPosted: 24 Nov 2020, 16:55 
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Yeah I have been using the Anderic clone that I learned about from the Domesday86 website. Works great, but it is nice to have the real one now that it seems repair and service have become my main hobby. Also included was a "wobbler" 8" GGV disc with a chunk taken out of one side to put the focus servo through its paces.

Did you ever find booklet GRT1028 that came with the Tuning Fork videos?
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 Post subject: Re: DiscoVision Philips Code Test Disc
PostPosted: 24 Nov 2020, 17:03 
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'fraid not. I forgot about it but it would be wonderful to find. (As it is I've got some service manuals to scan and upload)

Can you take a picture of that modified GGV? I've got just enough copies to chance trying that here.
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 Post subject: Re: DiscoVision Philips Code Test Disc
PostPosted: 24 Nov 2020, 23:37 
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What HappyCube said...

I've been picking up GM discs, and shockingly some of the Technidisc stuff isn't terrible. I do have one where the aluminum has literally disintegrated. Very strange. Still trying to catalog the entire GM library.

I have GGV1012 and GGV1069 which appear to be identical Mint Markings on GGV1069 are GGV1015. Are there any differences between the three you've picked up? What is GGV-129 - it's not here in LDDB?
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 Post subject: Re: DiscoVision Philips Code Test Disc
PostPosted: 25 Nov 2020, 22:04 
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blam1 wrote:
Are there any differences between the three you've picked up? What is GGV-129 - it's not here in LDDB?

That is what I am trying to discern, but I won't be able to properly check them out until next week. I was using one of them after I got it just like the other GGVs though (at least 115 and 475 are the same). I'm going to map the appropriate Sony reference frames to the Pioneer ones as well.

GGV-129 is the absurd screwdriver they made for centering and tangential adjustments from the CLD-3070 to the CLD-D702 era.
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 Post subject: Re: DiscoVision Philips Code Test Disc
PostPosted: 26 Nov 2020, 06:53 
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Not absurd, just a bit eccentric... (ducks)

IIRC the GGV's have some subtle differences, but I don't know what they are - the best way to spot the ones that count are comparing service manuals for players from appropriate eras.
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 Post subject: Re: DiscoVision Philips Code Test Disc
PostPosted: 27 Nov 2020, 19:27 
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happycube wrote:
Not absurd, just a bit eccentric... (ducks)

:lol: This gave me a seg fault! :lol:
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 Post subject: Re: DiscoVision Philips Code Test Disc
PostPosted: 29 Nov 2020, 02:13 
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I have attached a photo of the wobbler.


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 Post subject: Re: DiscoVision Philips Code Test Disc
PostPosted: 30 Nov 2020, 18:59 
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Sounds like a freggin' freight train....
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 Post subject: Re: DiscoVision Philips Code Test Disc
PostPosted: 30 Nov 2020, 23:03 
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Haha indeed. I tested it out on my beater unit and it sounded like there was a running engine inside.
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 Post subject: Re: DiscoVision Philips Code Test Disc
PostPosted: 02 Dec 2020, 07:51 
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I don't think I could do that to a GGV disk. I pictured something more like a careful punch, but I don't see how that could work cleanly either.

I do like the comment about stopping it...
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