This information was taken from the Amiga 3000T manual.

DB 23-pin Male

PIN	NAME	DESCRIPTION
1	XCLK	External Clock
2	XCLKGEN	External Clock Enable
3	RED	Analogue Red
4	GREEN	Analogue Green
5	BLUE	Analogue Blue
6	DI	Digital Intensity (47 Ohm)
7	DB	Digital Blue (47 Ohm)
8	DG	Digital Green (47 Ohm)/TD>
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 XCLKGEN
14	ZD	Zero Detect (47 Ohm)
15	C1	Clock Out
16	GND
17	GND
18	GND
19	GND
20	GND
21	-12V	-12V DC (50ma)
22	+12V	+12V DC (100ma)
23	+5V	+5V DC (100ma)