Grave "A"
Matrix column 1, row 4 ·
Wiring
- Column 1
- Yellow-Brown J137-1 · Q98
- Row 4
- Red-Yellow J133-5 · Q87
Parts
- Installed LED 44 Blue Super Flex
- Bulb #44 24-6549
- Assembly A-11754
Location
Related
Service log
Everything you record stays on this device.
Service notes: In the lamp matrix at column 1 (driver Q98, J137-1) 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