Grave "R"
Matrix column 4, row 4 ·
Wiring
- Column 4
- Yellow-Black J137-4 · Q95
- Row 4
- Red-Yellow J133-5 · Q87
Parts
- Installed LED 44 Blue Super Flex
- Bulb #44 24-6549
- Assembly A-11271
Location
Related
Service log
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Service notes: In the lamp matrix at column 4 (driver Q95, J137-4) and row 4 (driver Q87, J133-5). One dark lamp is the #44 bulb (24-6549) 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