CTV MATSUI 1407R - Modification for AV In

Hi Chas,

Your best chance of finding this data is with member @michael-dranfield his collection of manuals is legendary. As I've used the mention feature of this forum, Michael will have received a notification of this thread.

I can have a look tomorrow, it's a long time since I did CRT for a living so I don't just recognise the model number off the top of my head but I did do a lot of mastarcare stuff in the 80s and I have kept all my service manuals. 

Needless to say you should check that the reason there are no external AV inputs is the TV might be live chassis, rendering it unsuitable for conversion. They might have used an alternative, more expensive, isolated PS in TVs built with AJ connectors installed.

Posted by: @chasl001

↑

Appreciate I've not posted enough to qualify for the VRAT data library access.

Hi Chas, only just spotted this, it's not true, you've had access to the data library pretty much since you joined, it's just there is nothing in there.

There used to be over 10,000 items in our online library, and I have much more that wasn't yet scanned. It all had to be removed due to running out of server storage, though I have a copy on my PC. Now it's just a temporary staging area, manuals get copied in then deleted as and when requested. Yesterday I looked in all my cabinets, and my PC, nothing for Matsui 1407, which is why I reckoned if Michael does not have it, you're unlikely to find it.

Posted by: @michael-dranfield

↑

I can have a look tomorrow, it's a long time since I did CRT for a living so I don't just recognise the model number off the top of my head but I did do a lot of mastarcare stuff in the 80s and I have kept all my service manuals. 

Thanks Michael, appreciate it if you find even a cct for this particular model.

Posted by: @irob2345

↑

Needless to say you should check that the reason there are no external AV inputs is the TV might be live chassis, rendering it unsuitable for conversion. They might have used an alternative, more expensive, isolated PS in TVs built with AJ connectors installed.

Yeah, appreciate that, hence the need for the cct before I even begin, haven't even taken the back off yet.

I expect it's going to be a no-goer, but to pick up a couple of these for a quid each was a bargain I could not refuse.

I remember teaching trainees about working on live chassis when I was a TTI, so I'll just have to try and remember what I taught all those years ago 😉😉

Posted by: @crustytv

↑

Posted by: @chasl001

↑

Appreciate I've not posted enough to qualify for the VRAT data library access.

Hi Chas, only just spotted this, it's not true, you've had access to the data library pretty much since you joined, it's just there is nothing in there.

There used to be over 10,000 items in our online library, and I have much more that wasn't yet scanned. It all had to be removed due to running out of server storage, though I have a copy on my PC. Now it's just a temporary staging area, manuals get copied in then deleted as and when requested. Yesterday I looked in all my cabinets, and my PC, nothing for Matsui 1407, which is why I reckoned if Michael does not have it, you're unlikely to find it.

Thanks, my memory must be playing tricks, I seem to remember you had to post xx number of times before you gained access to the library. Oh well, Nurse! ...  

Posted by: @irob2345

↑

Needless to say you should check that the reason there are no external AV inputs is the TV might be live chassis, rendering it unsuitable for conversion. They might have used an alternative, more expensive, isolated PS in TVs built with AJ connectors installed.

I can remember seeing a range of sets which although not having an isolated SMPS it had external inputs using opto couplers. There still must a been a small mains transformer though to feed power to the cold side of the opto’s. Not sure of the brand, Hitachi maybe?

Well progress of sorts on the project.

1. The sets work - Bonus, one of the two remotes also works

2. Whilst this set has no AV inputs, the chassis must be one used by multiple models made for Currys Matsui brand, as there are holes in the PCB for mounting a SCART Socket.

3. Given 2 above, the worry about Isolation is minimal, as it has a fully isolated SMPS PSU and the ground pins of what would have been the SCART connector (Pins 4, 5, 9, 13, 14, 17, 18 & 21 ) all go to the ground on the COLD side.

The not such good news side is that none of the Matsui 14xx series manuals I have found have the same major ICs as in this board.

IC601 - Video signal processing = TB1229N

IC103 - System controller? = OEC6047B

IC850 - Teletext = CF70195NW

The datasheet for the TB1229 shows it has switchable Video inputs and both Analogue and Digital RGB inputs for Text and presumably input from the SCART socket if it was fitted. I have yet to check where the input connections go. If just terminated with caps, then I can probably feed in computer RGB and on the CVBS side, break into the Video input instead of the tuner.

The set was built around 1995 - 2000 as the manual for the 1403 states it as being 1995. I've checked the few back issues I have of Television Magazine but they're older, similarly my copies of Television Servicing.

Some time back I found a Television Magazine Index on the web which listed all the makes and models that had been featured, blowed if I can find it now. Anyone???

So I'll begin mapping out the connections from the vacant SCART pins and the components, in the hope I can use similar interfaces on other models the re-create the inputs and there's an area on the back cabinet perfect for mounting sockets.  

Managed to find time to have a quick look today and I can't find the manual for the model you want but this doesn't mean I don't have it as there are many different names used for these orion based sets, take a look at the photo to see what I mean, if you could find some other names used for this set it would be useful, also a photo of the chassis might help.

Now I see your chip line up I have another idea, I will check again in the morning. 

Posted by: @michael-dranfield

↑

Managed to find time to have a quick look today and I can't find the manual for the model you want but this doesn't mean I don't have it as there are many different names used for these orion based sets, take a look at the photo to see what I mean, if you could find some other names used for this set it would be useful, also a photo of the chassis might help.

-- attachment is not available --

 

Here's some pics of the PCB with number which may help.

Posted by: @michael-dranfield

↑

Now I see your chip line up I have another idea, I will check again in the morning. 

Thanks, appreciate it.

Just realised, the set is a 1407S not a 1407R as in the thread title, sorry. Can that be changed? I changed this post title.

Sorry, no luck yet, thus is the one I was thinking of but totally different.

So with Deerstalker firmly in place and Lens to the fore, I was determined to find out more about this set. I tested the other set and that worked fine - as a TV - so that made me more enthused about this potential modification. 

I found a website (there are several) which had a spreadsheet of Make/Model cross references, I expect it's already here on the forum but if not let me know and I'll upload it. Suffice to say, it did indeed list the Matsui 1407 see screen grab

As you can see, it correctly shows the 1407 as an Orion model with the PCB Marked TM784A as does mine.

Also, it states that the 1407 is the same as the 2107N. I found a manual for that set and it categorically is NOT the same, different chips throughout!

So next, I thought, I wonder if anyone else has had these difficulties and searched high and low through different forums to no avail.

Then, by chance, I came across good old TELEVISION magazine. I searched the ones I had, but they only go up to the late 80s. Then I found a website that has copies for practically all the years it was published. I downloaded the copies from 1990 to 2005 and searched them for anything related to a Matsui 1407. I found one instance where Eugene Trundall reported a fault on one. I looked at my set for similarities but what he worked on was not what I had.

Getting more and more frustrated, I just kept searching anything Matsui, Orion, 14" TV. Several times I doubted my own eyesight and gave up. 

Today I thought I'd take another look, having found a datasheet for the Jungle Chip IC601 - TB1229CN, I found the sheet for a TB1229DN, close enough. It has AV switching built in but that controlled by the I2C BUS, which I could probably hack - I built a Memory Chip reader for the engineers at Mastercare years ago. But I wondered if using the remote I could force the AV switchover. The sets remote has some hidden contacts on it for probable use with another model, but these didn't activate AV, nor did a one-for-all remote programmed with almost every other Matsui code, the set would only respond to the original remote or one code ((0)147).

So I put the back on the set and was about to put it out in the shed when I noticed something odd, see the pic below:

 Can you spot it???

Well, it seems the model number is Not 1407 as in ONE FOUR ZERO SEVEN, but

ONE FOUR OH (capital letter O) SEVEN.

Sadly however, this has not helped in my search, still no circuit diagrams for this model found.

Looks like I'll have to put this aside for the foreseeable future.

AV inputs were often selected as a channel number - you could get to AV In with the Channel Down button.

We used to program our AV automation systems to turn the TV ON (regardless of its current state) by hitting a Channel Up button. Then, to select AV In you'd first hit Channel 1 and then the Channel Down button.

There used to be a website called www.remotecentral.com. Sadly it now seems to be gone.

Posted by: @irob2345

↑

AV inputs were often selected as a channel number - you could get to AV In with the Channel Down button.

We used to program our AV automation systems to turn the TV ON (regardless of its current state) by hitting a Channel Up button. Then, to select AV In you'd first hit Channel 1 and then the Channel Down button.

There used to be a website called www.remotecentral.com. Sadly it now seems to be gone.

Thanks, I was aware of the Channel buttons taking you to AV input but this seems not to be the case with this model. I suspect, that as there are no AV inputs, this option has been programmed out. The channels are programmable but Ch 0 can't be set. I'll give the Ch1 then down option a go but I think I've sort of done that already.