Re: VECTOR: Re: G05 and q502

OK, in this case D504 (the LED) is supplying power to Q502 emitter.  If 
the LED is open the spot killer won't work.  Looks to me that you'd 
still have a normal picture, though.


Tom Bombaci wrote:

>Looks like d504 on a G05-801 is a 1N914. on a G05-802, d504 is the LED.
>
>I am referring to the '802' manual below
>
>http://arcarc.xmission.com/archive/PDF%20Monitors/Electrohome%20G05-802%20G05-805%20Monochrome%20XY%20Issue%202%20Atari%20TM-151.pdf
>
>Page 20, about 60% down.
>
>-tom
>----- Original Message ----- 
>From: "Rodger Boots" <[email protected]>
>To: <[email protected]>
>Sent: Tuesday, May 10, 2005 2:24 AM
>Subject: Re: VECTOR: Re: G05 and q502
>
>
>Hmmm, manual I looked at has D504 being an 1N914 diode at the junction
>of C508, C509, & D505. Either being shorted or open would kill the spot
>killer. D507 is the LED.
>
>Maybe I have a different manual.
>
>
>[email protected] wrote:
>
>  
>
>>"Poor brightness with retrace lines could mean a defective D504, or
>>perhaps the “Z” signal wire is not connected properly to the base
>>of Q504."
>>
>>According to the manual, d504 is the Red LED. How does a
>>defective LED cause retrace lines?
>>
>>-tom
>>

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