Re: Got the V2000 HV blues...

Did anyone else notice that the manual (in a note) says that the 1 A fuse
used to be a 1.5 A fuse on early monitors?

Possible causes: bad fuse holder causing extra heating of fuse, leaky
electrolytic (runs warm, goes into thermal runaway as it gets warmer, blows
fuse), open electrolytic (causing ripple current back into fuse), flyback
being driven at wrong frequency, misadjusted voltage regulator in HV unit
(is HV level correct), problem with regulator (does HV change as unit
warms?).

On Thu, Aug 5, 2010 at 12:00 AM, John Robertson <pinball@telus.net> wrote:

> Total Impulse wrote:
>
>> 1 amp slo-blo.
>>
>> Then the problem could be a defective picture tube that has an
> intermittent shorting screen or similar flaw. You could test this hypothesis
> by simply unplugging the picture tube neck plug, leaving the HV anode and
> the aquadag grounds in place and again wait to see if the fuse fails. If it
> does go to the next tests below.
>
> If you have a couple of voltmeters and some time you could put an ammeter
> in series with the fuse and a second meter monitoring the screen output
> (400VDC) of the HV cage. See if there is an inverse relation between the
> current and the HV and how long it takes - then use some cold spray (or hold
> a can of blowing/dusting upside down) on a few items to see if you can find
> a relationship...
>
> If you have a 38VDC supply on your bench then simply put the HV anode cap
> in a ceramic coffee cup (clean) and leave it on for a while monitoring the
> meters at times to see what is happening.
>
> You might try turning out the room lights and see if there is any glow
> around the transformer or on the underside of the PCB indicating a HV
> leakage path...
>
> John :-#)#
>
> Cinelabs Info wrote:
>>
>>> Did you use a Slo-Blo or Fast-Acting device for F102?
>>> -Mark
>>> On Mon, Aug 2, 2010 at 12:36 PM, Total Impulse <totalimpulse@comcast.net<mailto:
>>> totalimpulse@comcast.net>> wrote:
>>>
>>>
>>> It was up and running yesterday for at least 5 hours, sitting on the
>>> floor next to the game. Today, I reinstalled it in the game, and it
>>> kept working fine. Then, I installed the back door on the cabinet,
>>> and 30-45 minutes later, the monitor was dark. F102 was blown again.
>>>
>>>
>>
>>
>
> --
> John's Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9 Call
> (604)872-5757 or Fax 872-2010 (Pinballs, Jukes, VideoGames)
> www.flippers.com "Old pinballers never die, they just flip
> out"
>
> ---------------------------------------------------------------------------
> ** Unsubscribe, subscribe, or view the archives at
> http://www.vectorlist.org
> ** Please direct other questions, comments, or problems to
> chris@westnet.com
>

---------------------------------------------------------------------------
** Unsubscribe, subscribe, or view the archives at http://www.vectorlist.org
** Please direct other questions, comments, or problems to chris@westnet.com
Received on Thu Aug 5 02:03:55 2010