Upper Right Jet
Matrix column 2, row 2 ·
Wiring
- Column 2
- Yellow-Red J137-2 · Q97
- Row 2
- Red-Black J133-2 · Q89
Parts
- Installed LED 555 Cool 4+1
- Bulb #555 24-8768
- Assembly A-11199
Location
Related
Service log
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Service notes: In the lamp matrix at column 2 (driver Q97, J137-2) and row 2 (driver Q89, J133-2). 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