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Old 30th Apr 2024, 3:51 am   #1
label321
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Default Philips 1218 TXT Issues:

Hello reader,


I have a Philips k30 chassis tv.

With dark snow not bright.

And the led display on de front does'nt work either.

The led works one second if you turn the tv on or off.

And if you search channels it shows a yellow bar.

I dont have much knowledge of old tvs.

But may someone can give me tips or tell me whats is broken.


Regards Justin.
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Old 30th Apr 2024, 12:00 pm   #2
Welsh Anorak
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Default Re: Philips 1218 TXT Issues:

This sounds like a later remote version, in which case there's probabaly a rechargeable battery in it on one of the left side panels. This will need replacing, and you may find it has leaked down the panel.
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Old 30th Apr 2024, 2:00 pm   #3
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Default Re: Philips 1218 TXT Issues:

Hi,

Yeah i cut the battery same problem.
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Old 30th Apr 2024, 4:33 pm   #4
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Default Re: Philips 1218 TXT Issues:

The battery stores the (preset) brightness, colour and volume settings whilst the TV is switched off. Possibly also the station tuning as well (although unless there are still analogue TV broadcasts in the Netherlands, you won't receive anything without a digital to analogue terrestrial TV adaptor box or a DVD player with a UHF or VHF modulator fitted, or another suitable programme source).

If you don't fit a good battery, these settings will have to be reset every time the TV is switched on.
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Old 30th Apr 2024, 5:12 pm   #5
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Default Re: Philips 1218 TXT Issues:

I've not seen a K30 like this, so I suspect it wasn't sold in the UK.

Do check the PCB for leakage from the battery.

If you press brightness + you should see the snow get brighter. If not you have a fault on the tuning/remote sub panels. Check the fusible resistors Philips were so fond of.

Maarten will probably know more about this particular model. Over here we usually had the VST tuning system.
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Old 30th Apr 2024, 5:13 pm   #6
label321
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Default Re: Philips 1218 TXT Issues:

No broadcast on cable anymore here in NL.

Yeah i know that if you remove the battery that is wil not save the settings.

But it has no led display and the tv din't receive a nintendo or hdmi converter.
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Old 30th Apr 2024, 7:47 pm   #7
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Default Re: Philips 1218 TXT Issues:

Hi.

As this set has yellow bar tuning I think it has the VST tuning control system. I don't recall the K30 having this but the very similar K35 did. VST was also used with the CTX-E and System 4 (KT4/K40). The microcontroller IC should be type MSM5840H. Quite often with Philips service information, a supplement is required to be used with the main service info. In this case it would be useful to have a look at the VST supplementary service information. Unfortunately I can't locate my data but hopefully another forum member may be able to help.

The MSM5840H microcontroller IC has a service mode by grounding pin 16 to assist fault finding. It would be good though to first check the supplies to the IC are in order and look out for any physical signs on the board. The chip is normally quite reliable. The NiCad memory back up battery is often the cause of problems on this board as others have said. It was a long time ago that I last repaired a K35 with the VST system, probably thirty years ago.
Good luck with the repair.

Regards,
Symon
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Old 1st May 2024, 4:02 am   #8
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Default Re: Philips 1218 TXT Issues:

A picture of the actual model number label on the back of the set would help, various pictures of the chassis would be nice too we like pictures, lots of pictures
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Old 1st May 2024, 3:39 pm   #9
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Default Re: Philips 1218 TXT Issues:

Type 22SC1218.

Not much i can find on the interwebs.

Pictures wil follow.
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Old 1st May 2024, 7:03 pm   #10
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Default Re: Philips 1218 TXT Issues:

Type 22CS1218 is indeed listed as the K30 chassis from about 1981, 22SC models don't appear to exist, so I take it that was a typo

Thanks
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Old 3rd May 2024, 6:11 pm   #11
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Default Re: Philips 1218 TXT Issues:

Hi Justin,
I mainly wanted photos of the chassis/circuit boards as there were two versions of the K30 and also its smaller sibling the KT3, the first earlier version used a two chip colour decoder, the later Edition 2 of both chassis used a single chip decoder.

There were some other differences too mainly the mother board as the decoder panels were not interchangeable and would have helped us to help you, as there were some faults that applied to one but not the other, some faults are common to both versions.
I don't expect you to know which version you have but we would have saw which.

Secondly Philips used at least three versions of control at this point, 1) basic manual (of which yours isn't) and two versions of electronic control, 2) voltage synthesized tuning, or VST and 3) a system called TRD, Photographs here would have determined which you have.
This would lead to more accurate fault diagnosis.
Thanks
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Old 3rd May 2024, 9:46 pm   #12
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Default Re: Philips 1218 TXT Issues:

TRD = Tuning Remote Digital....in case anyone wondered....!

R to B couldn't have explained it better! PLEASE post some pictures of your chassis.
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Old 4th May 2024, 9:11 am   #13
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Default Re: Philips 1218 TXT Issues:

Someone did indeed wonder! Thanks.
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Old 4th May 2024, 11:51 am   #14
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Default Re: Philips 1218 TXT Issues:

The earliest TRD version was seen in the K12 chassis and was built up entirely in logic ICs and used direct channel selection with two (BCD?) switches. I don't think it even had presets, but did it have a remote? It should have or else it couldn't have been a TRD. I should have taken the once in a lifetime oppertunity to take it home when I saw such a set by the curb, many years ago...
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Old 4th May 2024, 12:49 pm   #15
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Default Re: Philips 1218 TXT Issues:

Quote:
Originally Posted by Sideband View Post
TRD = Tuning Remote Digital....in case anyone wondered....!
In its very first usage (at a symposium about ICs for TV from Philips Semiconductors / Valvo in 1974) TRD meant "Touch, Remote and DICS)".
DICS itself meaning Digital Integrated Channel Selection.
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Old 6th May 2024, 1:27 am   #16
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Default Re: Philips 1218 TXT Issues:

Quote:
Originally Posted by label321 View Post
And if you search channels it shows a yellow bar.
Wouldn't that tell it is a VST version?

It is years since I last did one of these, but if I remember right if the battery failed all the controls went to zero. This means no light or sound.

The other problems mentioned I never encountered. Could be that the battery has leaked though.
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Old 6th May 2024, 9:02 am   #17
Philips210
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Default Re: Philips 1218 TXT Issues:

Quote:
Originally Posted by hans View Post
Quote:
Originally Posted by label321 View Post
And if you search channels it shows a yellow bar.
Wouldn't that tell it is a VST version?
That's what I was thinking in post #7 Hans. In which case I doubt that the main chassis is a K30. It's more likely to be the similar K35.

Regards,
Symon
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Old 6th May 2024, 3:25 pm   #18
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Default Re: Philips 1218 TXT Issues:

Quote:
Originally Posted by Philips210 View Post
Quote:
Originally Posted by hans View Post
Quote:
Originally Posted by label321 View Post
And if you search channels it shows a yellow bar.
Wouldn't that tell it is a VST version?
That's what I was thinking in post #7 Hans. In which case I doubt that the main chassis is a K30. It's more likely to be the similar K35.

Regards,
Symon
Hi Symon, Hans

Model 22CS1218 is listed as the K30 in the official Philips Model Survey (attached), SC
models of any size as provided by the OP don't appear to exist at all in the official Philips model lists.

Could the Philips lists be incomplete and there was a K35 version of the same model? I don't know but it is possible, could this be a version of the K30 chassis we haven't seen yet? again I don't know, this is why I requested photographs from the OP so we would know what we are actually dealing with here.

As a side note apparently there was a version of the K35 that used the earlier two chip decoder too, I have never seen one in the flesh! all the K35 chassis that I ever saw only used the single chip version, besides I would have thought that by the time the slightly later K35 was released all of the decoder panels would have been updated to the single chip version by then?
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File Type: pdf Chassis Philips 2003.pdf (174.5 KB, 37 views)
File Type: pdf philips model number survey 2002.pdf (177.7 KB, 31 views)
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Last edited by Red to black; 6th May 2024 at 3:34 pm.
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Old 6th May 2024, 4:02 pm   #19
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Default Re: Philips 1218 TXT Issues:

Thanks Red to black for the Philips model lists, they're very comprehensive.
Yes, agree, a K35 with the two chip decoder is a surprise and a rarity.

Perhaps Philips briefly introduced the VST system on very late K30 models on the continent. I'm almost sure we never had VST with a K30 chassis in the UK.
The only yellow bar tuned sets I came across were mostly fitted with the CTX-E and K35 chassis. I did see a few with the System 4 chassis as well but not that many. The majority of System 4 sets that I saw used the TRD tuning system.

Regards,
Symon
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Old 6th May 2024, 7:24 pm   #20
Maarten
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Default Re: Philips 1218 TXT Issues:

Quote:
Originally Posted by Philips210 View Post
Quote:
Originally Posted by hans View Post
Quote:
Originally Posted by label321 View Post
And if you search channels it shows a yellow bar.
Wouldn't that tell it is a VST version?
That's what I was thinking in post #7 Hans. In which case I doubt that the main chassis is a K30. It's more likely to be the similar K35.
K35 sets have a model number with a number 3 directy behind the letters CS so with a number 1 this is clearly a K30. It's indeed likely it uses a VST tuning system.

The exact type of decoder might also depend on the features of the set (TXT would probably use the one chip decoder) and/or where it was made.

Last edited by Maarten; 6th May 2024 at 7:31 pm.
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