Allen&Heath GL4000 SERVICE MANUAL User Manual

Page 37

ALLEN & HEATH

GL4000 SYS-LINK OPTION

CONSOLE FRONT

GL4000-824 inverted with the base cover removed.

fig. 2

Chan
24

Chan

REMOVE THE INPUT CONNECTOR CIRCUIT BOARD ASSEMBLY:

The INPUT CONNECTOR circuit board assembly (A) directly behind the SYS-LINK connector mountings on
the rear panel must be removed to gain access to the SYS-LINK D type connector mounting holes.
Follow the procedure below:
1

Unscrew the 16 XLR mounting screws and remove the 32 jack socket nuts on the rear connector
panel.

Disconnect the 8 flexible flat cables (C) from the INPUT CHANNEL circuit board assemblies.

Disconnectd the ribbon harness (D)

Carefully remove the INPUT CONNECTOR circuit board assembly (A) and place to one side.

Now remove the SYS-LINK blanking plate.

Only technically competent personel should attempt to fit the SYS-LINK option.
Disconnect the Power Supply Unit and cables from the console before fitting
the expander module.

PRELIMINARY:

To fit the SYS-LINK option it is necessary to partially remove the INPUT CHANNEL circuit board assembly
next to the GROUP 1 circuit board to enable access to the SYS-LINK circuit board mounting holes. The
INPUT CONNECTOR circuit board assembly behind the SYS-LINK D type connector mounting holes on
the rear panel will also have to be removed. It is not necessary to remove any other circuit board assemblies
as access to the SYS-LINK connections can be made with a pair of long nose pliers.

REMOVE THE KNOB CAPS:

Pull off the knob caps and unscrew the nuts from the INPUT CHANNEL next to GROUP 1 channel. The
switch caps can remain in place.
Remove the optional Meterbridge if fitted.

REMOVE THE CONSOLE BASE :

Carefully invert the console and remove the base panel by removing all screws along the edges of the base
panel. Also remove the 3 screws in the centre of the largest panel