Ball Shooter
Matrix column 2, row 7 ·
Wiring
- Column 2
- Green-Red J206-2 · U20-17
- Row 7
- White-Violet J208-8 · U19-5
Parts
- Switch 5647-12693-04
- Assembly A-11619
Location
Owner's hint
Rollover switch with a wire actuator. Check that the wire moves freely and the microswitch clicks. (owner's experience, not the manual)
Service log
Everything you record stays on this device.
Service notes: In the switch matrix at column 2 (J206-2, U20-17) and row 7 (J208-8, U19-5). Gap 1/16 inch; clean by pulling card stock through the closed contacts, never a file. One switch that fails T.1 is its gap, the wire at the lug or its diode; a shorted diode makes the whole column or row misread. A whole column dead is U20 or the J206 pin, a whole row is the row comparator. A3 Switches and optos
Appendices:A3 Switches and optosA5 Power driver boardA1 Multimeter basics