|
Vintage Television and Video Vintage television and video equipment, programmes, VCRs etc. |
|
Thread Tools |
10th Aug 2008, 10:56 am | #1 |
Heptode
Join Date: Feb 2007
Location: La Spezia, Italy
Posts: 834
|
Philips KT3
Hello,
I have just fished a 1979 Philips KT3 16" portable from a skip, the set works and has a nice picture, but the programme selector keypad/display is faulty, some of the buttons are selecting a wrong programme, for example, if i push 2 i get 5 , but if i push 5 i get 5 correctly... i have already tried to swap the ICs on the front control panel assembly and on the customer control board (which is still based on potentiometers) and also checked the entire set for dry joints, but the fault is still there |
10th Aug 2008, 9:58 pm | #2 |
Dekatron
Join Date: Sep 2003
Location: Bolton, Greater Manchester, UK.
Posts: 6,644
|
Re: Philips KT3
If it's got Neons in the tuning cabinet, change them all. Sounds like No5 is faulty. Also check capacitors, clean the unit out thoroughly and check any ribbon cables or connectors.
Check the buttons themselves. Cheers, Steve P.
__________________
If we've always had it, why is the Car Boot open? You're not sneaking another Old TV in are you...? |
11th Aug 2008, 12:03 am | #3 |
Heptode
Join Date: Feb 2007
Location: La Spezia, Italy
Posts: 834
|
Re: Philips KT3
Hello,
There are a couple of neon bulbs on the front panel, one for the stdby light and another one (green) that flashes whenever a button is pressed... i can see no other neon bulbs in this set... I'll put the set on the bench this week... |
11th Aug 2008, 8:13 am | #4 |
Octode
Join Date: Apr 2007
Location: Hampshire, UK.
Posts: 1,574
|
Re: Philips KT3
If this is the sort of KT3 where the tuning controls are in a drawer that slides out then it is very common to find that the solid core wires they used crack where they go into the plugs. Often the insulation is left undamaged so this can be a tedious fault to find.
|
11th Aug 2008, 6:07 pm | #5 |
Heptode
Join Date: Feb 2007
Location: La Spezia, Italy
Posts: 834
|
Re: Philips KT3
In my set, the tuning controls are under a removable cover on the right side of the cabinet.
|
11th Aug 2008, 6:46 pm | #6 | |
Heptode
Join Date: Dec 2006
Location: Milton Keynes, Buckinghamshire, UK.
Posts: 696
|
Re: Philips KT3
Quote:
Regards Dr. Dave
__________________
Do you have the scope to be a TV repair man |
|
11th Aug 2008, 6:49 pm | #7 | |
Dekatron
Join Date: Sep 2006
Location: Kilmarnock, Ayrshire, UK.
Posts: 5,420
|
Re: Philips KT3
Quote:
Does your set have the finger touch type buttons ? Can you post a photo so I identify the model. Trevor
__________________
Cheers, Trevor. MM0KJJ. RSGB, GQRP, WACRAL, K&LARC. Member |
|
12th Aug 2008, 2:55 pm | #8 |
Dekatron
Join Date: Apr 2005
Location: North Wales, UK.
Posts: 6,884
|
Re: Philips KT3
Hi
This is an early remote control set with a number displayed on a large LED and momentary push button controls to choose the station. I have had this fault, but I'm sure it was one of the two ICs on the PCB with the tuning wheels on it. Either that or a diode in the selector part of the circuit on the earthy end of the pots. ISTR the two ICs on there are slightly different. It's basically a ring counter which earths the end of each pot sequentially via a diode. When you select 2 but it says 5, does it select pot 5, pot 2 or neither? I think that would help pinpoint the area of the fault. Glyn |
12th Aug 2008, 3:19 pm | #9 |
Retired Dormant Member
Join Date: Feb 2008
Location: Croydon, London, UK.
Posts: 408
|
Re: Philips KT3
i have had this fault before and i think it will do it for all the even channel numbers that are selected
the fault is on the panel with the pots on it i think one of the ic is a counter of some sort |
13th Aug 2008, 12:24 am | #10 |
Heptode
Join Date: Feb 2007
Location: La Spezia, Italy
Posts: 834
|
Re: Philips KT3
|
28th Aug 2008, 2:31 pm | #11 |
Heptode
Join Date: Feb 2007
Location: La Spezia, Italy
Posts: 834
|
Re: Philips KT3
here's a photo of the set, i haven't yet been able to find the fault
|
31st Aug 2008, 7:25 pm | #12 |
Dekatron
Join Date: Aug 2006
Location: Madrid, Spain / Wirral, UK
Posts: 7,484
|
Re: Philips KT3
Nice sets - very commmon over here.
I have one without remote, mechanical ch switches, and a few months back i found the remote version - well, i salvaged its control panel in a smashed set on the street! When i get round to mounting it in my other set I will let you know if i have any odd faults. |