Cousin It (2)
Matrix column 2, row 6 ·
Wiring
- Column 2
- Yellow-Red J137-2 · Q97
- Row 6
- Red-Blue J133-7 · Q85
Parts
Location
Related
Service log
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Service notes: In the lamp matrix at column 2 (driver Q97, J137-2) and row 6 (driver Q85, J133-7). One dark lamp is the #555 bulb (24-8768) or its socket; a whole column or row dark is the driver transistor or the J137/J133 connector, not the bulbs. Find it in T.8 Single Lamp Test. With LEDs, a faint glow on lamps that should be off is matrix ghosting: the ghost-busting ROM for this game or non-ghosting LEDs. A4 Lamps, flashers and GI
Appendices:A4 Lamps, flashers and GIA5 Power driver boardA1 Multimeter basics