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Testing 600 XL

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I am trying to test a stock NTSC 600XL to see if it works.  It does not have a monitor port.  I don't have a TV with an antenna hookup on it.

 

Any ideas as to how I can test this?

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you must have a TV or monitor with an RF input to see, hear, touch the built-in Self Test functions (memory check, keyboard check, sound check).

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I have the RF-Coax adapter. I can try it on my Big TV. I know that has a Coax input.  Thanks!

 

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It's most probably a digital signal only connection.

It is possible to get a mono (Luma) signal pretty easily from the motherboard. But since I don't have an NTSC version schematics, I cannot find it. In the PAL version it's available at the emiter leg of the Q6 transistor (just needs additional 75R resistor).

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If you can find VCR (the tape mechanism doesn't have to work), you can use it's tuner section to convert RF signal to composite.

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3 hours ago, Peri Noid said:

It's most probably a digital signal only connection.

It is possible to get a mono (Luma) signal pretty easily from the motherboard. But since I don't have an NTSC version schematics, I cannot find it. In the PAL version it's available at the emiter leg of the Q6 transistor (just needs additional 75R resistor).

I hadn't thought of that, but could you just pull the audio and video off the modulator input an rig up a poor test cable. The 

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2 hours ago, oo7 said:

You could sell it as is to me if it’s cosmetics are ok

It will eventually go up for sale with all the rest of my stuff.  This particular 600XL is in "like-new" condition in the original box (I'm the 2nd owner; original owner is a friend) which is why I hesitate to open it up and mess with it.

  • Thanks 1

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3 hours ago, ZuluGula said:

If you can find VCR (the tape mechanism doesn't have to work), you can use it's tuner section to convert RF signal to composite.

Good idea... I have a VCR right here.

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2 hours ago, bf2k+ said:

It will eventually go up for sale with all the rest of my stuff.  This particular 600XL is in "like-new" condition in the original box (I'm the 2nd owner; original owner is a friend) which is why I hesitate to open it up and mess with it.

Interested 

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