Start Button
Matrix column 1, row 3 ·
Wiring
- Column 1
- Green-Brown J206-1 · U20-18
- Row 3
- White-Orange J208-3 · U18-5
Parts
- Assembly 20-9663-1
Location
Owner's hint
Coin door / cabinet switch. Dedicated or matrix according to the table. (owner's experience, not the manual)
Related
Service log
Everything you record stays on this device.
Service notes: In the switch matrix at column 1 (J206-1, U20-18) and row 3 (J208-3, U18-5). 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