Re: Commodore 1084s RGB Cable Question.

Ray,

I totally understand where ya coming from on that..... So now I'm in a
dilemma...do I open it up and possibly make matters worse.... or just use it
on my C64 (as it works fine on that in 40col), and go on the hunt for an
adapter (if they exist) that allow me to connect a normal old 14inch pc
monitor to the c128. I don't suppose you know if one exists? (or for a
charge, be able to build me one?)

Regards.
Paul.

p.s. that you for all your help on this matter.

"Ray" <rr0cc@xxxxxxxxx> wrote in message
news:dcreh1$r61$1@xxxxxxxxxxxxxxxxxxxxxxxxxx
>> When in 80 col mode, it does exactly what you said, the VSync is not
>> working, as the screen is scrolling upwards (it looks like) so much that
>> there are like 8 commodore start up messages flashing by. I've tried it
>> on another c128 (neither are D machines) and both produce the same
>> output.. I've tried tweaking the knobs on the back (VSync/H-Hold/V-Hold),
>> and reducing the brightness/contrast, etc, but nothing. I'm guessing
>> maybe the RGB connector on the monitor is duff, as when I'm connected
>> with the Video out (DIN plug) on the 128 to the red/white and yellow
>> connectors on the back, it all appears fine, no jumping what so-ever.
>> Do you come to the same conclusion, or could it be something else?>
>
> Paul,
> That actually sounds like a different problem. The H sync (cable
> capacitance) problem I mentioned shows as picture bending (sideways) or
> total loss of video. If the V sync is interrupted, the picture will indeed
> scroll up/down instead of locking as it should. If there is a sync switch
> on the monitor, make sure it's set to DIGital with POSitive sync. Other
> than that (and you -know- the cable continuity checks OK pin for pin)
> there might be a problem with the monitor... broken connection inside or a
> circuit problem. Does the vertical hold control have any effect on the
> speed of picture rolling? If not, an internal ground connection to the
> front control panel may have opened up (cracked board or ???). Even with
> total loss of vertical sync, you should be able to set the hold control
> for a single (although "floating") image. Bad solder connections sometimes
> respond to "percussive diagnostics" ie bumping the monitor with your hand.
> Most if not all Commodore monitors eventually suffer from bad solder and
> resulting intermittants. The first thing I do when I get one open on the
> bench is resolder everything... then look for other problems, if any.
>
> Ray
> --
>
> My return addy is spamblocked. To reply, remove the zeroes.


.

Relevant Pages

  • Re: Commodore 1084s RGB Cable Question.
    ... I'm guessing maybe the RGB connector on the monitor is duff, as when I'm connected with the Video out on the 128 to the red/white and yellow connectors on the back, it all appears fine, no jumping what so-ever. ... The H sync problem I mentioned shows as picture bending or total loss of video. ... an internal ground connection to the front control panel may have opened up. ... Most if not all Commodore monitors eventually suffer from bad solder and resulting intermittants. ...
    (comp.sys.cbm)
  • Re: When will we be able to sync via WiFi?
    ... plugging in the USB does not disable the phones data connection. ... same way exchange is supposedly secure. ... "or some other company makes a sync app that ...
    (microsoft.public.pocketpc.activesync)
  • Re: Apple //e RGB Card to CGA pinout?
    ... it can use composite sync on the same terminal which is Horizontal when using separated syncs. ... I read in the Mitsubishi manual that it should be possible to have the syncs composite on the green input too, but that doesn't work because then the normal monocrome video output should work on the green input. ... I then made a quick adapter for the mitsubishi monitor without the resistors to display "8 colors". ... If you already connected CGA monitor to PC and it is working fine with no problem, then the configuration from Apple //e RGB card to CGA monitor is wrong according to my theory. ...
    (comp.sys.apple2)
  • WM5 and AS4.1 issues - initial sync takes forever
    ... new Windows Mobile 5 device to use for himself. ... Windows Firewall is off for the Windows Mobile network connection ... First sync occured online, in office. ... Activesync partnerships deleted. ...
    (microsoft.public.pocketpc.activesync)
  • Re: Apple //e RGB Card to CGA pinout?
    ... it can use composite sync on the same terminal which is Horizontal when using separated syncs. ... Either there is a problem with the levels or the monitor might be broken (I will open it and see if there is anything to adjust. ... If you already connected CGA monitor to PC and it is working fine with no problem, then the configuration from Apple //e RGB card to CGA monitor is wrong according to my theory. ... I will proceed later today to investigate with an oscilloscope and compare the signals from the apple with the signals from the cga card. ...
    (comp.sys.apple2)