This information was taken from the Amiga 3000T manual.
DB 23-pin Male
Pin Name Description
1 XCLK External Clock
2 XCLKEN External Clock Enable
3 RED Analog Red
4 GREEN Analog Green
5 BLUE Analog Blue
6 DI Digital Intensity (47 Ohm)
7 DB Digital Blue (47 Ohm)
8 DG Digital Green (47 Ohm)
9 DR Digital Red (47 Ohm)
10 CSYNC Composite Sync
11 HSYNC Horizontal Sync (47 Ohm)
12 VSYNC Vertical Sync (47 Ohm)
13 GNDRTN Return for XCLKEN
14 ZD Zero Detect (47 Ohm)
15 C1 Clock Out
16 GND
17 GND
18 GND
19 GND
20 GND
21 -12V -12 Volts DC (50ma)
22 +12V +12 Volts DC (100 mA)
23 +5V +5 Volts DC (100mA)