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Old 14th Oct 2020, 2:17 pm   #1
Clansman1968
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Default Sony Trinitron KV-1800UB

hi trying to connect this TV to digital set top box have connected settop box to aerial and then used output on set top box to TV but im not getting any signal am i doing something wrong the set top box has a scart connection but obviously the TV set dosnt thanks for any help .
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Old 14th Oct 2020, 2:23 pm   #2
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Default Re: sony trinitron KV-1800UB

It's probable that your set top box does not have an RF modulator needed when receivers don't have a Scart or phono video/audio sockets. The aerial/output sockets on your set top box are simply aerial pass through. Hope this explains your problem. John.
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Old 14th Oct 2020, 2:32 pm   #3
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Default Re: sony trinitron KV-1800UB

thanks for reply ill have to look round for different set top box.
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Old 14th Oct 2020, 5:16 pm   #4
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Default Re: sony trinitron KV-1800UB

There aren't many that do have RF out, and most of those are quite old now.
It's usually best to buy a stand alone RF modulator (make sure it's for UK use) which is relatively cheap and easily available on line. Otherwise use an old VHS recorder (try a charity shop or Freeecycle) which will probably have a SCART input and RF output. The deck itself doesn't actually have to work.
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Old 14th Oct 2020, 7:37 pm   #5
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Default Re: Sony Trinitron KV-1800UB

Hi Welsh I've still got a VHS player what connections do I connect it all up in thanks.
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Old 15th Oct 2020, 8:56 am   #6
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Default Re: Sony Trinitron KV-1800UB

Another pitfall is that many of the last generation of video recorders don't have a modulator either as most TV receivers had scart sockets fitted! You will be safe with anything produced in the 80's to the mid 90's.
If your not sure we can probably advise. John.
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Old 15th Oct 2020, 9:13 am   #7
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Default Re: Sony Trinitron KV-1800UB

Hi.
Some VCR's can shut down too if left on without a tape running (E to E mode). The modulator is the neatest way of doing this TBH.
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Old 15th Oct 2020, 9:32 am   #8
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Default Re: Sony Trinitron KV-1800UB

Connection is easy. You'll need an RF lead (coax lead male to female) and a SCART lead.
Just run the coax from the VCR's RF out socket to the TV's aerial input.
If your VCR works, then play a tape. As you do, rotate the tuning knob on the Sony. The output is usually (though not always) around channel 36 on the dial. If this works, then your VCR is suitable. Connect a SCART lead from the set-top box to the SCART imput of the VCR. Select the aux input (maybe EXT, L1, A1 or similar) and it should work.
If you don't have a SCART socket or you don't get a picture when tuning, your VCR might not be suitable as John says, so come back to us and we can help.
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Old 15th Oct 2020, 3:05 pm   #9
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Default Re: Sony Trinitron KV-1800UB

Big thanks for all your help have tried what you said using another analogue tv and what you suggested works , think im gonna have to have the sony looked at have attached a pic of start up screen on it i know it was working when put into storage about 3 years ago hopefully it wont be much to sort out pic isnt exactly like shown as taking with camera changes it slightly i suppose because of flicker .
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Old 15th Oct 2020, 3:19 pm   #10
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Default Re: Sony Trinitron KV-1800UB

Probably a capacitor drying out which will need replacement. From your post it sounds like you'll need to find someone to sort it out for you. Might be worth posting on the 'repair Services Wanted' on the forum - there might be someone nearby.
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Old 15th Oct 2020, 4:17 pm   #11
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Default Re: Sony Trinitron KV-1800UB

Thanks again for your help.
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Old 17th Nov 2020, 4:06 pm   #12
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Default Re: Sony Trinitron KV-1800UB

Hi guys the TV couldn't be repaired something to do with the tube, I've got hold of a mitsubishi ct- 2207bm working condition connected VHS player to it and can watch videos but when connect didgy box to VHS player the signal doesn't seem to be going through as nothing on screen any thoughts on that .
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Old 17th Nov 2020, 4:54 pm   #13
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Default Re: Sony Trinitron KV-1800UB

If you've selected the correct input (AV1, AV2 or whatever) on the VCR and just get a blank screen then it's likely your digibox is set to RGB output whereas your VCR wants CVBS (PAL Video). If you connect your digibox to a TV that can display the output then go to the menu and select CVBS or video as opposed to RGB in settings. Then it should work.
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Old 17th Nov 2020, 7:56 pm   #14
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Default Re: Sony Trinitron KV-1800UB

Hi Glyn thanks for your help again I'll try that out tomorrow and let you know how I get on cheers.
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Old 17th Nov 2020, 8:37 pm   #15
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Default Re: Sony Trinitron KV-1800UB

Can't remember if it's the 1800 or the 1810 that had a cap decoupling the colour output stages. 200v rating it was, I would look around there though.
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Old 18th Nov 2020, 10:59 am   #16
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Default Re: Sony Trinitron KV-1800UB

Going back to your post #12 regarding the Sony, I'd find it odd that the tube has failed after storage. Much more likely is Tony's suggestion of a decoupling capacitor.
Of course the tubes in these were pretty short lived so it's likely the repairer said it's not worth repair as when it's done the picture will be poor anyway. Worth keeping the set though.
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Old 18th Nov 2020, 11:19 am   #17
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Default Re: Sony Trinitron KV-1800UB

Me again checked didgy box it's set to cvbs have set up as in pic as said can play videos but still not getting signal from didgy box have connected scart lead to AV1(TV) and scart on flat screen TV and it's picking up didgy box so signal must be going through VHS player but still not getting to the old tv.

Excuse drawing.
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Old 19th Nov 2020, 12:21 pm   #18
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Default Re: Sony Trinitron KV-1800UB

That VCR is a Funai which are a law unto themselves and may have cut corners with the AV switching. Any chance you could find a different VCR? Doesn't have to play, just loop the AV input through to the RF.
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Old 19th Nov 2020, 12:46 pm   #19
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Default Re: Sony Trinitron KV-1800UB

Hi Glyn thanks again I'll see what I can find might splash out and get a modulator.
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