Allen heath gs1 mixer service manual
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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