Re: WG 6102

As a follow-up, I started going through the troubleshooting flow charge
and found the following (I did this with all plugs in place - P600, P700
& P100):

P900 on HV
- Pin 1 shows 28v solid if the monitor screen blanks, but stays around
   the 27.x range with fluctuations from 25.0 to 28.4 with the screen on.
- Pin 5 shows around 25v-27v with the screen blank and 190v solid
   when it on. It's my understanding that show read 180v, not 190v.

I'm thinking the above proves I have an issue in the HV section and it's
probably the caps or surrounding components, such as Q900-Q903.
Checking Bob Robert's WG6100 cap kit (and the additional parts
list) and it doesn't seem to include Q900. Should I assume that part
never goes bad?

Scott Caldwell

Scott Caldwell wrote:
> WG6102 (P327, P328, P329)
>
> I am almost done with my Tempest cabaret restoration, but am still
> fighting
> with the monitor. Depending on the monitor's mode, it may or may not
> turn on when the game is powered on. However, a good wack to the
> side of the cabinet will usually bring it back. Obviously, this
> sounds like
> cold solder or a loose connection. I believe it's in the HV unit, but
> for the
> life of me I can't find it. I resoldered all pins, cleaned the pins
> on I could
> the row of pins, but the molex plug, etc. Can't find any burned or
> damaged components on the board.
>
> Here is what I know:
>
> - Even with the picture off, there is still loads of deflection chatter.
> - If the monitor is off, the tube itself doesn't crackle. However,
> when it
> turns back on I hear the normal crackle. If the monitors turns on when
> powerd on, I also hear the normal crackle.
> - With the monitor out of the game, and when the picture is on, I can
> very
> lightly tap the top of the HV cage and it turns off (but deflection
> chatter
> can still be heard). If I tape the cage again, it rarely turns on,
> but if I
> hit (wtih some effort) the side of the frame, near the top, that the
> HV unit
> is on, the screen will usually flash the image for a moment and fail
> again.
> If I do this enough, it will eventually stay on.
> - I have NOT done a cap kit on the monitor yet, since I am still
> trying to
> get the "correct" list of parts together for this monitor (it's a
> true 6102)
> and I know there has been discussion before relating to what is the
> correct parts, what's not, whom sells it, what they sub, etc., etc.,
> etc.
> - Testing the HV, under the cup, shows 20Kv and it climbs a little if the
> monitor is on about a minute or so. My HV probe isn't the most
> accurate and tends to fluctuate slightly (about .5Kv or so).
> - The other problem I am seeing with the monitor is a curve across the
> bottom of the screen and shaky vectors. I know the shaky vectors
> are usually a missing HV cage (mine is present) or bad caps at 901,
> 902 and 905 in HV unit. However, I'm not sure what is causing the
> curve.
>
> Anyone have any ideas?
>
> Scott C.
>
>
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>

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Received on Sat Aug 5 16:49:58 2006