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DISCLAIMER: The pinouts shown here were contributed by manufacturers, vendors and individuals. While every effort has been made to insure accuracy, LaserFX.com can not be responsible for any errors or omissions.

Laser Fantasy International - Three channel drive amp

Pinout for the edge connector and dip switches settings on the Laser Fantasy International three channel closed loop scan driver board. This is NOT an official Laser Fantasy document - for the latest info, contact Laser Fantasy directly.
This closed loop driver card has been superseded by newer designs but is still found in older equipment and is often available on the used/surplus market.

Edge connector

Edge connector has numbered contacts one one side and lettered contacts on the other

Pin Number	Signal description
1 & A	Ground
2 & B	- 15 VDC
3 & C	+ 15 VDC

Driver channel one - Use with X galvo

Pin Number	Wire Colour	GS DB15 connector	Function
1 & A	shield/orange/brown	4 & 13	Ground
4 & D	white	8	+12 for oscillator
7 & H	black	3	Position feedback
8 & J	red	11	Position feedback
6 & F	red/green	1 & 9	Drive coil low
5 & E	black/yellow	2 & 10	Drive coil high
9 & K			Input [normal]
10 & L			Input [inverting]

Driver channel two - Use with Y galvo

Pin Number	Wire Colour	GS DB15 connector	Function
1 & A	shield/orange/brown	4 & 13	Ground
4 & D	white	8	+12 for oscillator
13 & P	black	3	Position feedback
14 & R	red	11	Position feedback
12 & N	red/green	1 & 9	Drive coil low
11 & M	black/yellow	2 & 10	Drive coil high
15 & S			Input [normal]
16 & T			Input [inverting]

Driver channel three - Use with Blanking galvo

Pin Number	Wire Colour	GS DB15 connector	Function
1 & A	shield/orange/brown	4 & 13	Ground
4 & D	white	8	+12 for oscillator
19 & W	black	3	Position feedback
20 & X	red	11	Position feedback
18 & V	red/green	1 & 9	Drive coil low
17 & U	black/yellow	2 & 10	Drive coil high
21 & Y			Input [normal]
22 & Z			Input [inverting]

NOTE

1/ Wire colours shown are representative of General scanning G120D type galvos with DB15 connectors.
2/ To use the amp with unbalanced signals, connect signal to normal and ground connections for each channel. To use the amp with balanced line signals, connect to the normal, inverting and ground connections and adjust DIP switches.

DIP switch settings

X and Y channels [chan 1 & 2]
Unbalanced input - Normal image output : 2, 5, 7, 8 ON - all others off
Unbalanced input - Inverted image output : 1, 2, 4, 7 ON - all others off
Balanced input - Normal image output : 1, 3, 5, 8, 9 ON - all others off
Balanced input - Inverted image output : 1, 3, 5, 6,7 ON - all others off

Blanking channel [chan 3]
Normal output : 1, 2 ON - all others off
Invert output : 3, 4 ON - all others off

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