SPORTS ART C51R, Руководство по ремонту

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SPORTS ART INDUSTRIAL CO., LTD.
Display Board Key Test
1. Test for “short” when the key is not pressed:
(a) Put multimeter to the ohm setting. Place probes on two points on one side of the key as shown.
(b) Normal reading when the key is not pressed down: OL or “open” as shown on the lower left.
(c) If the reading shows a number near 0 ohm, the key has “shorted out.” Replace the key or the whole
display board.
2. Test for “open” when the key is pressed:
(a) Put multimeter to the ohm setting. Place probes on two points on one side of the key.
(b) Press the key as shown on the lower right. Normal reading: close to 0 ohm.
(c) If the reading is greater than 2 ohm or “open, “ the key is malfunctioning. Replace the key or the whole
display board.
Normal reading when not pressed: “OL” or “open” Normal reading when pressed: near 0 ohm
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