Re: black widow xy monitor problem

  The reset tests low with the logic probe
Thanks,
Dan Piraino

Daniel Piraino wrote:

> The board set is not working I tested the x and y outputs and I get
> no readings. The probe shows both X and Y low. The Z is high. Im not
> familiar with these boards. The only vector board im familair with and
> have repaired is the asteroids. This board is a gravitar converted to
> Black Widow. All voltages to the board are what they should be. I
> probed the mpu and the majority of the pins where low and about five
> were high. There is no pulsing of data. There should be some shouldnt
> there be? Im lacking information. I need to know what does what on
> this board so I can figure out whats going on with it. I need to know
> what kind of readings I should get from X,Y and Z. (I dont have a
> scope.) I also need to know what readings the mpu should give me. ( I
> only have a DMM and a Logic Probe)
>
> If anyone knows where I can get some info on the web or has some to
> share I would appreciate it,
> Thanks,
> Dan Piraino
>
> Anthony Pietrak wrote:
>
>>Dan,
>>
>>Not sure if you addressed this yet, but is the your Black Widow boardset
>>known working?
>>
>>Assuming it is, I've found that most issues with these monitors are not
>>componenents failing (assuming you recapped the board, and reflowed all of
>>the solder joints on the pins). Many issues are usually a loose wire on a
>>molex connector. I've also seen bad connections on the sockets of the
>>deflection transistors, usually a wire will get weak at the solder joint and
>>fall off.
>>
>>Probably sounds obvious, but I would just give a good tug and jiggle on all
>>of your connectors while the monitor is on and see if something comes up.
>>
>>Anthony
>>
>>
>>--Anthony Pietrak
>>www.QuarterArcade.com
>>Restored Arcade Games for your Home
>>
>>
>>
>>>-----Original Message-----
>>>From: owner-vectorlist@vectorlist.org
>>>[mailto:owner-vectorlist@vectorlist.org] On Behalf Of Daniel Piraino
>>>Sent: Sunday, July 31, 2005 8:44 PM
>>>To: vectorlist@vectorlist.org
>>>Subject: Re: VECTOR: black widow xy monitor problem
>>>
>>>
>>> I replaced 100 uf cap on HV board. C902 I think.
>>>I checked voltage coming off of pin 1 and pin 8 of the hv board. Im
>>>getting +/-25 vdc instead of +/- 28 vdc. Is that enough? I
>>>also checked
>>>pin 5 of the same connector for 180v, but all I get is 171v. Is that
>>>enough? I still have to check Q900 thru Q903. I checked the resistors
>>>around those transistors and they check out ok. Spot killer is not on.
>>>I also checked Q603 and Q703 on the deflection board and resistors
>>>around those. Their all good. Like I said before I checked the
>>>transistors on the chassis and they checked out ok.
>>>But I unplugged the transistors from the deflection board to see what
>>>would happen. I still get the same results with the transistors not
>>>plugged in.
>>> Now maybe Q605, Q606 and Q705, Q706 are not good, they checked out
>>>alright though.
>>>Any ideas,
>>>Dan Piraino
>>>
>>>Daniel Piraino wrote:
>>>
>>>
>>>
>>>> I have been trying to get this monitor up and running. But
>>>>
>>>>
>>>still have
>>>
>>>
>>>>a problem with the picture only showing a dot in the middle of the
>>>>screen. If I turn up the brightness on the HV, the dot gets
>>>>
>>>>
>>>bigger. I
>>>
>>>
>>>>can here some chatter. There is an lv2000 installed. Checked all
>>>>transistors on chassis , checked out good. Checked HV board
>>>>
>>>>
>>>replaced
>>>
>>>
>>>>1.5k resistor that was burnt but it didnt fix the problem. After
>>>>resistor was replaced I forgot to plug in ground on HV board from
>>>>brightness& focus part of the HV transformer. It made aloud
>>>>
>>>>
>>>squelling
>>>
>>>
>>>>noise. It then stopped when I plugged it in. I saw some smoke but
>>>>couldnt see anything burnt. Could I have hurt something else?
>>>>Any ideas,
>>>>Dan Piraino
>>>>
>>>>
>>>>
>>>>
>>>--------------------------------------------------------------
>>>-------------
>>>
>>>
>>>>** Unsubscribe, subscribe, or view the archives at
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>>>>** Please direct other questions, comments, or problems to
>>>>chris@westnet.com
>>>>
>>>>
>>>>
>>>--------------------------------------------------------------
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>>>comments, or problems to chris@westnet.com
>>>
>>>
>>>
>>
>>
>>
>>
>>
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>>** Please direct other questions, comments, or problems to chris@westnet.com
>>
>>
>>

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Received on Tue Aug 2 23:50:16 2005