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ALLEN & HEATH 2 S1SM1 copyright © 1995 ALLEN & HEATH Ltd. All rights reservedPublication...................... 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 ...................................................
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ALLEN & HEATH 3 S1SM1
DIMENSIONS
Dimensions packedunpacked packed
W D H Kg(lb) Kg (lb)
GS1 .................................................................... 630 ..... 550 ..... 140 .................. 7.5 (16.5) ...................... 10.5 (23.1)
EXPANDER ....................................................... 400 ..... 550 ..... 140 .................. 5 (11) ............................ 7 (15.4)
METERBRIDGE ................................................ 630 ..... 100 ..... 140 .................. 1.5 (3.3) ........................ 2.5 (5.5)
PSU .................................................................... packed with GS1 ....................... 1 (2.2) ........................... packed with GS1
OUTPUTS:
2 TRACK OUT ............... RCA PHONO ............. tip hot, sleeve gnd unbalanced .. 50 ohms ........................ -10dBV, +4dBu
GROUP OUT ................. RCA PHONO ............. tip hot, sleeve gnd unbalanced .. 50 ohms ........................ -10dBV, +4dBu
AUX OUT ....................... 1/4" JACKS ................ tip hot, ring gnd unbalanced ....... 50 ohms ........................ -10dBV, +4dBu
INSERT SEND ............... 1/4" JACKS ................ tip send, ring return unbalanced 50 ohms ........................ -10dBV, +4dBu
MONITOR OUT ............. RCA PHONO ............. tip hot, sleeve gnd unbalanced .. 50 ohms ........................ -10dBV, +4dBu
HEADPHONE ................ 1/4" JACK .................. tip L, ring R ................................ for stereo headphones 8 to 400 ohms
INPUTS:
MIC IN ............................ XLR ............................ pin 2 hot, 3 coldbalanced.......... >2k ohms ......... variable -60 to -20dBu
LINE IN .......................... XLR ............................ pin 2 hot, 3 cold balanced .......... >25k ohms ....... variable -30 to +10dBu
LINE IN .......................... 1/4" JACK .................. tip hot, ring gndunbalanced...... >25k ohms ....... variable -30 to +10dBu
STEREO LINE IN ........... 1/4" JACKS ................ tip hot, ring gnd unbalanced ....... >10k ohms .................... -10dBV, +4dBu
STEREO RETURN ........ 1/4" JACKS ................ tip hot, ring gnd unbalanced ....... >5k ohms ...................... -10dBV, +4dBu
2 TRACK RETURN ........ RCA PHONO ............. tip hot, sleeve gnd unbalanced .. >10k ohms .................... -10dBV, +4dBu
TAPE RETURN ............. RCA PHONO ............. tip hot, sleeve gnd unbalanced .. >5k ohms ...................... -10dBV, +4dBu
INSERT RETURN .......... 1/4" JACKS ................ tip send, ring return unbalanced >5k ohms ...................... -10dBV, +4dBu
CONNECTIONS
METERBRIDGEPSU
EXPANDER GS1
