Re: Trouble with WG6100

On Mon, 10 Apr 2000 14:13:25 Walt wrote:
>Noel:
>
>Sorry, should be Q604 NOT Q607. I will look at the part from Bob's kit
>tonite. I replaced the 4 transistors on the heat sinks with NTE48's and
>NTE49's.

I believe Gregg's article calls for NTE50's (not 48's) at Q603 and Q703. Although I have used the 49's at 604 and 704, I have never tried the 50's at 603 and 703. Why, you might ask? Because I initially relied on this summary of Gregg's article, which leaves out this upgrade:

http://www.gamearchive.com/video/manufacturer/atari/vector/html/zanen206.html

I plan to try the NTE50's within the next two weeks. We may have stumbled across your problem here. I believe that the NTE48's are NPN transistors, while the schematic calls for PNP at locations Q603 and Q703. I assume that NTE50's are PNP and would work.

Noel

>
>
>----- Original Message -----
>From: Noel Johnson <nej2001@my-Deja.com>
>To: <vectorlist@synthcom.com>
>Sent: Monday, April 10, 2000 1:20 PM
>Subject: Re: VECTOR: Trouble with WG6100
>
>
>>
>> --
>>
>> On Mon, 10 Apr 2000 08:01:06 Walt wrote:
>> >Update on my Monitor -- I got it working!!
>> >
>> >Turns out you were right Jon, I should have been more careful with Bob
>> >Robert's unsupported upgrade kit. Turns out the transistors included in
>the
>> >kit for Q607/Q704 were the wrong type and were causing all the blown
>diodes
>> >and fuses.
>>
>> Are you sure you don't mean Q604, not Q607? I don't believe there is a
>Q607 on the deflection board. Q604 and Q704 are two of the four transistors
>with heatsinks on the deflection board. Gregg Woodcock's article recommends
>upgrading these from the original MPSU07 (or NTE188) to the beefier NTE49.
>I have done this a half dozen times on P314 and P327 revision boards with no
>ill affects. Would you mind if I asked what part that Bob substituted for
>these?
>>
>> Thanks,
>> Noel Johnson
>>
>
>
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Received on Mon Apr 10 17:34:07 2000