Safety warning, Introduction, Service and technical support – Allen&Heath GS1 SERVICE MANUAL User Manual

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ALLEN & HEATH

S1SM1

Publication ...................... AP2064 Issue 1

INTRODUCTION

The information presented in this manual is intended for competent technical personnel to carry out service and product
support for the GS1. We assume that the reader is familiar with the related electronic theory and audio terminology,
and is able to carry out basic servicing, fault-finding and repair of audio equipment of this type. Service personnel should
also be familiar with audio systems, mains earthing and power requirements, as well as handling precautions.

For further information on the operation and application of the GS1, please refer to the

USER GUIDE

publication

AP2061 supplied with each unit.

Whilst we believe the information in this manual to be reliable we do not assume responsibility for inaccuracies. We
also reserve the right to make changes in the interest of further product development.

SERVICE AND TECHNICAL SUPPORT

Under normal conditions the GS1 does not require user maintenance or internal calibration. Any service work required
should be carried out by qualified technical personnel only.

We are able to offer further product support through our worldwide distribution network. To help us provide the most
efficient service please would you quote the console serial number in any communication regarding this product.

SAFETY WARNING !

Mains electricity is dangerous and can kill. Mains voltage is not present within the

GS1

console but is present in the external power supply unit. Do not attempt to disassemble the
power supply unit. Do not carry out any work within the

GS1 console while it is powered. The

external power supply unit is factory set to match your local a.c. mains supply and marked
on the cover. Check that this matches your local mains supply. Check your mains wiring
and earthing before switching on.

CONTENTS

INTRODUCTION ................................................................................... 2
SERVICE & TECHNICAL SUPPORT .................................................... 2
PRECAUTIONS ..................................................................................... 2
DIMENSIONS ........................................................................................ 3
CONNECTIONS .................................................................................... 3
TECHNICAL SPECIFICATION .............................................................. 4
MIDI IMPLEMENTATION DATA ........................................................... 4
CONSOLE FUNCTIONAL CHECK ....................................................... 5
CONSOLE DISASSEMBLY ................................................................... 7
REMOVING THE CONSOLE CIRCUIT BOARD .................................. 8
EXPANDER DISASSEMBLY ................................................................. 9
REMOVING THE EXPANDER CIRCUIT BOARD ................................ 10
EXPANDER OPTION FITTING INSTRUCTIONS ................................. 11
METERBRIDGE OPTION FITTING INSTRUCTIONS .......................... 12
ORDERING SPARE PARTS ................................................................. 16

TECHNICAL DIAGRAMS

BLOCK DIAGRAM .................................................................................
GS1 CONSOLE CIRCUIT DIAGRAM PCB KEY ..................................
PCB COMPONENT LAYOUT - CHANS 1 to 8 .....................................
PCB COMPONENT LAYOUT - CHANS 9 to 16 & MASTER L-R .........
CONSOLE CIRCUIT DIAGRAMS (8 pages) .........................................
GS1 EXPANDER CIRCUIT DIAGRAM PCB KEY ................................
EXPANDER PCB COMPONENT LAYOUT ...........................................
EXPANDER CIRCUIT DIAGRAMS (3 pages) .......................................
METERBRIDGE PCB LAYOUT .............................................................
METERBRIDGE CIRCUIT DIAGRAM ...................................................