Re: WG 6102

I should have waited 5 more minutes to send this...

I was able to get the screen on again and adjusted the monitor to around
19.5Kv,
but the curve is still present. While it was on, I seriously wiggled
the wires going
into the red, flat connector for P900 (HV) and no change. Did the same
for the
other two-wire molex connector on the HV and no change. What about the two
transistors on the outside of the HV cage. Those don't normally get
replaced,
but could either of those cause this?

I did notice after the monitor was on a few minutes that the picture
shut off and I
wasn't able to get it to flash back on for a moment by hitting the side
of the frame.
It's got to be something else.

Scott C.

Scott Caldwell wrote:
> Alright. Here is an update on this, but I still need some help.
>
> I have performed Bob Robert's ENTIRE deluxe cap kit and am still having
> the same issues. My molex connector for P900 on the HV PCB is red, not
> white, but I tried pressing the wires into the scissors pins (same
> results).
> Anything else that would cause this. I reflowed/replaced solder on every
> solder joint I could find or thing of, that looked goofy, etc.
>
> BTW, I did replace the pot on the HV PCB, but until I can get the HV to
> kick in again, I can't adjust it to the correct 19.5Kv. I did see
> what it was
> reading when I hit the monitor on the side and the voltage jumps from 0
> to around 3-5Kv for just a moment, since the monitor image isn't staying
> on.
>
> Scott C.
>
> -----Original Message-----
> From: Scott Caldwell <scottcaldwell@sbcglobal.net>
> To: vectorlist@vectorlist.org
> Date: Mon, 07 Aug 2006 01:02:10 -0500
> Subject: Re: VECTOR: Re[2]: VECTOR: WG 6102
>
> > >
> > > I've replaced the pot before (another HV unit), so that's no
> sweat, but what
> > > connectors are you referring to (P900 and the other molex plug)?
> > >
>
> i was refering to the flat white connector on the loom that plugs onto
> the pcb.
>
> Scott Caldwell wrote:
> > I've replaced the pot before (another HV unit), so that's no sweat,
> but what
> > connectors are you referring to (P900 and the other molex plug)?
> >
> > Scott C.
> >
> > peter jones wrote:
> >> the caps would not explain the fact that you can change things by
> banging it - that points to the connectors and the pot.
> >>
> >>
> ---------------------------------------------------------------------------
>
>
> Scott Caldwell wrote:
>> 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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>>> chris@westnet.com
>>>
>>>
>>
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>>
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>>
>>
>
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>
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>
>

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Received on Sat Aug 12 16:54:49 2006