Pin assignments of LC575 logic board v.s. analog board
| Number | Logic board | Analog board |
|---|---|---|
| 1 | -12V | -12V |
| 2 | GND | GND |
| 3 | +5V | +5V |
| 4 | GND | GND |
| 5 | +5V cont. | +5V cont. |
| 6 | GND | GND |
| 7 | /PFW | /PFW |
| 8 | GND | GND |
| 9 | Composite/Horizontal sync. | Composite sync. |
| 10 | GND | GND |
| 11 | Video (B) | Video (B) |
| 12 | GND | GND |
| 13 | Video (G) | Video (G) |
| 14 | GND | GND |
| 15 | Video (R) | Video (R) |
| 16 | GND | GND |
| 17 | Brightness | Brightness |
| 18 | GND | GND |
| 19 | Contrast | Contrast |
| 20 | Monitor ID 2 | Monitor ID 2 |
| 21 | Mic (+) | Mic (+) |
| 22 | Mic (-) | Mic (-) |
| 23 | +5V | Mic(+5V) |
| 24 | Monitor ID 1 | Monitor ID 1 |
| 25 | Monitor ID 0 | Monitor ID 0 |
| 26 | GND | GND |
| 27 | n.c. | n.c. |
| 28 | Sound out (R+) | Sound out (R+) |
| 29 | Sound out (R-) --> FG | Sound out (R-) |
| 30 | Sound out (L+) | Sound out (L+) |
| 31 | Sound out (L-) --> FG | Sound out (L-) |
| 32 | GND | GND |
| 33 | Vertical sync. | n.c. |
| 34 | n.c. | n.c. |
| 35 | n.c. | n.c. |
| 36 | GND | GND |
| 37 | Sound muting control | Sound muting control |
| 38 | GND | GND |
| 39 | Monitor blinking control | Monitor blinking control |
| 40 | GND | GND |
| 41 | n.c. | |
| 42 | n.c. | |
| 43 | n.c. | |
| 44 | CD-ROM sound (R+) | |
| 45 | GND | |
| 46 | CD-ROM sound (R-) | |
| 47 | GND | |
| 48 | CD-ROM sound (L+) | |
| 49 | GND | |
| 50 | CD-ROM sound (L-) |