Atari CX 5200 Field Service Manual page 57

If the unit canno t be adjusted or if values are out of ran g e, proceed to the F lowchart
Entry P oint: Pg. 4A-20.
POKEY SOFTFIRE TEST
Connect the oscilloscope to pin 1 6 of A7 (l v/divisionjl O ms/div.).
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Insert the controller into port 1.
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Press key 5 followed by ST ART.
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Press the top fire button (softfire).
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A 5v p-p square wave signal should appear.
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SOFTF IRE TRO UBLESHOOTIN G FLOW CHART, page 4 A- 1 9.
Unplug the controller from port 1 and plug it into port 2.
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Repeat the fourth and fifth steps for port 2 .
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CX5200 Field S ervic e Manual
If it does not, proceed to the
3 A- l O