Allen&Heath GL2 User Manual

GL2 &

GL2S

RACK MOUNT MIXERS

SYS-LINK

EXPANDER OPTION

To connect one GL2 or GL2-S console as a channel expander to a second console by means of a single interconnecting cable.

Kit GL2-SL1 = SINGLE

Single option to install SYS-LINK to one GL2/GL2-S console to allow interconnection to a second console already fitted with SYS-LINK. Interconnecting cable not supplied.

Kit GL2-SL2 = DUAL

Dual option to install SYS-LINK to two GL2/GL2-S consoles. Interconnecting cable supplied.

For information on using SYS-LINK please refer to APPLICATIONS NOTE AP0205

FITTING INSTRUCTIONS

Publication AP0204

Issue 2 Aug 95

THE GL2 SYS-LINK EXPANDER OPTION

The GL2-SL1(2) option is supplied as a kit of parts to be installed in the ALLEN & HEATH GL2 or GL2-S console. This allows console to console interconnection via the GL2 SYS-LINK connector

standard. For information on using SYS-LINK please refer to the separate APPLICATIONS NOTE AP0205. Access is required to the console internal assemblies. Circuit assembly and soldering is necessary.

THIS WORK SHOULD ONLY BE CARRIED OUT BY TECHNICALLY QUALIFIED PERSONNEL.

1. CHECK THE CONTENTS OF THE KIT

These are listed on the PACKING SHEET AP0203 enclosed with the kit. The option comprises a pre-tested circuit assembly with connectors and wiring harness fitted, and a

replacement plug-on IDC ribbon harness.

2. PREPARE THE WORK AREA

Tools required include a 2-point crosshead screwdriver, 5, 12 and 15mm , longnose pliers, small

wirecutters, and a fine tipped soldering iron.

3. REMOVE THE CONSOLE BASE Follow the NUMBER SEQUENCE

INVERT THE CONSOLE

AND REMOVE 4x M3 BASE SECURING SCREWS.

DO NOT REMOVE THESE 3x POWER UNIT FIXING SCREWS.

DISCONNECT THE MAINS INPUT, UNPLUG

ALL CABLES AND REMOVE THE CONSOLE FROM THE RACK OR CASE.

REMOVE 2x POWER UNIT

SIDE M3 SCREWS.

REMOVE ALL THE JACK NUTS

(15mm NUTDRIVER) AND 4AB CONNECTOR SCREWS (XLRs, PHONOS).

CAREFULLY LIFT OFF THE

BASE.

REMOVE 4x FRONT PANEL M3

SCREWS

GL2 SYS-LINK EXPANDER OPTION SHEET AP0204 ALLEN & HEATH

REMOVE 4x FRONT PANEL SIDE

M3 SCREWS AND NUTS

4a. FIT THE SYS-LINK CIRCUIT ASSEMBLY GL2 DIAGRAM 1

Unplug and remove the existing console IDC ribbon harness. Cut out a section of the earth busbar between stereo channels 11/12 and 13/14 leaving about 3mm

at each end.

Remove the 4x screwlocks from the front of the SYS-LINK D-connectors. Keep these to secure

the connectors after the base is refitted.

Remove the 2x M3x6mm screws from the end of the SYS-LINK assembly spacers. Position the SYS-LINK assembly between the stereo channels 11/12 and 13/14. Solder the free ends

of the green earth wires to the cut ends of the console earth busbar.

Now mount the SYS-LINK assembly to stereo channel 11/12 using the M3x2mm screws previously

removed through the stereo board holes into the spacers.

4b. FIT THE SYS-LINK CIRCUIT ASSEMBLY GL2-S DIAGRAM 1

Unplug and remove the existing console IDC ribbon harness. Cut out a section of the earth busbar between stereo channels 15/16 and 17/18 leaving about 3mm

at each end.

Remove the 4x screwlocks from the front of the SYS-LINK D-connectors. Keep these to secure

the connectors after the base is refitted.

Remove the 2x M3x6mm screws from the end of the SYS-LINK assembly spacers. Position the SYS-LINK assembly between the stereo channels 15/16 and 17/18. Solder the free ends

of the green earth wires to the cut ends of the console earth busbar.

Now mount the SYS-LINK assembly to stereo channel 15/16 using the M3x2mm screws previously

removed through the stereo board holes into the spacers.

5a. SOLDER ON THE SYS-LINK WIRE HARNESS GL2 DIAGRAM 2

Lay the harness above the faders positioning each branch in place against the Group and Master

circuit assemblies.

Solder the prepared ends of the harness wires to their corresponding square solder pads on the Group

assemblies. This may be done with the assemblies in place by carefully using a fine-tipped soldering iron. Make sure the wiring pads are tinned with fresh solder first for good joints. The suggested order is :

Group Assembly 1 Pink wire, then Blue, Red, Yellow Group Assembly 2 Pink, Blue, Red, Yellow

Lift the Master Assembly slightly from the panel to gain access to the wiring pads. Do this by

removing the master control knobs, potentiometer nuts and chrome jack socket nut. Desolder the earth busbar from the Master assembly.

Solder the harness wires to the wiring pads on the Master Assembly as illustrated. the suggested

order is :

Master Assembly Pink, Blue, Red, Yellow, Brown, Grey

Refit the Master assembly. Make sure that the jack washers, potentiometers and meter LEDs are

correctly positioned in the panel cutouts. Replace the control nuts and knobs.

Resolder the earth busbar to the Master Assembly.

ALLEN & HEATH

GL2 SYS-LINK EXPANDER OPTION SHEET AP0204

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