Hi folks,
Replying to myself here since I've had a bit of a breakthrough but not in
the way I'd have liked. A fellow collector who also got one of these
machines at the same time opened his up and there was an extra little
bridgeboard piggybacked off some resistors next to the teletext display chi
On 31/10/2016 23:14, "drlegendre ." wrote:
> "Hence the question - am I wasting my time without a schematic for this
> analogue board?"
>
> Might be helpful if you mentioned exactly what is or isn't wrong with the
> unit.. describe the symptom(s), etc.
I thought I'd ask before ploughing on with
On 31/10/2016 22:22, "Peter Coghlan" wrote:
>>
>> Before I replaced the failed potentiometer (new one seen top left) the
>> display looked like its horizonal hold had gone so I reasoned that's what
>> the pot controlled. I can *nearly* get a steady picture but the brightness
>> is out as well, d
On 31/10/2016 22:29, "tony duell" wrote:
>
>> Before I replaced the failed potentiometer (new one seen top left) the
>> display looked like its horizonal hold had gone so I reasoned that's what
>
> OK... The TDA1180 is the horizontal oscillator, etc, IC. It's well-known.
>
> Start by getting i
"Hence the question - am I wasting my time without a schematic for this
analogue board?"
Might be helpful if you mentioned exactly what is or isn't wrong with the
unit.. describe the symptom(s), etc.
On Mon, Oct 31, 2016 at 1:44 PM, Adrian Graham wrote:
> Folks,
>
> I think I know the answer to
> Before I replaced the failed potentiometer (new one seen top left) the
> display looked like its horizonal hold had gone so I reasoned that's what
OK... The TDA1180 is the horizontal oscillator, etc, IC. It's well-known.
Start by getting its data sheet. Indentify the horizontal oscillator comp
>
> Before I replaced the failed potentiometer (new one seen top left) the
> display looked like its horizonal hold had gone so I reasoned that's what
> the pot controlled. I can *nearly* get a steady picture but the brightness
> is out as well, despite there being working pots for that and contras
On 31/10/2016 20:51, "tony duell" wrote:
>
>> My recent Executel addition has a 5" screen with associated analogue board
>> that seems to be powered from a display chip I can't find any info on, and
>
> Well, it won't be _powered_ from that IC. My guess is that said IC provides
> the HSync and
> My recent Executel addition has a 5" screen with associated analogue board
> that seems to be powered from a display chip I can't find any info on, and
Well, it won't be _powered_ from that IC. My guess is that said IC provides
the HSync and VSync signals, the video comes from other devices on
Folks,
I think I know the answer to this before I even ask, and that answer will be
'got a schematic' to which the answer's 'no and I doubt one exists any more'
but...
My recent Executel addition has a 5" screen with associated analogue board
that seems to be powered from a display chip I can't f
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