Re: Got the V2000 HV blues...

Rodger Boots <rlboots2@gmail.com> wrote:

>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"
>>
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Received on Thu Aug 5 09:56:56 2010