Re: Two Ampliphone HV problem questions

Did you fix the no heater problem?

I just had a similar problem. I connected the heater wires that go to the HV pcb to the coin door lamp supply and the picture was fine. The resistor on the heater winding tested good so I decided to remove it and test under load ...bingo ! New resistor fixed it.

Sent from my iPhone

On 20 Feb 2014, at 02:01, mkdud@aol.com wrote:

> I'll vouch for the Bob Parker ringer...I've got my $49.95 back x 20 on this, definitely recommended...
>
>
> -----Original Message-----
> From: John Robertson <pinball@telus.net>
> To: vectorlist <vectorlist@vectorlist.org>
> Sent: Sun, Feb 16, 2014 1:57 am
> Subject: Re: VECTOR: Two Ampliphone HV problem questions
>
> On 02/15/2014 10:11 PM, David Shoemaker wrote:
>> 1:
>> HVT with a cinelabs HV unit installed.
>> Good +/- 24 V
>> Good crackle / HV.
>> No neck glow, testing the heater voltage at the back of the board I am getting ~ 13.0v AC. Roughly double what I would expect. This tube was working fine with the last HV I worked on but I don’t have a known good at the moment to verify something didn’t go bad there. I did continuity test the tube heater pins and that seems fine.
>>
>>
>> 2:
>> HVT with a Red transformer (yea I know, red = dead).
>> I don’t have a ringer handy to test it with.
>>
>> Good -24
>> Bad +24 (reads around +12), I pulled the 406D out and retested, the +24 was there.
>>
>> Putting the 406D back in and replaced the LM7824, no change.
>>
>>
>> Suggestions?
>>
>> Thanks,
>> David
>>
>>
>>
> For $49.95 you can get a nice Bob Parker ringer...
>
> http://www.flippers.com/catalog/product_info.php/blue-flybacklopt-ring-tester-p-19
>
> Sorry folks, I couldn't resist! Bob designed two very nice pieces of test equipement and he is a nice guy too!
>
> John :-#)#
>
>
> --
> 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 Fri Feb 28 04:32:31 2014