Allen&Heath GL2800M SERVICE MANUAL

Copyright © 2007 Allen & Heath Limited. All rights reserved
ALLEN&HEATH
SERVICE MANUAL
GL2800M
Allen & Heath Limited
http://www.allen-heath.com
Limited One Year Warranty
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This product is warranted to be free from defects in materials or workmanship for period of one year from the date of purchase by the original owner. To ensure a high level of performance and reliability for which this equipment has been designed and manufactured, read this User Guide before operating. In the event of a failure, notify and return the defective unit to ALLEN & HEATH Limited or its authorised agent as soon as possible for repair under warranty subject to the following conditions
Conditions of Warranty
The equipment has been installed and operated in accordance with the instructions in this User Guide. The equipment has not been subject to misuse either intended or accidental, neglect, or alteration other than as described in the User Guide or Service Manual, or approved by ALLEN & HEATH. Any necessary adjustment, alteration or repair has been carried out by ALLEN & HEATH or its authorised agent. This warranty does not cover fader wear and tear. The defective unit is to be returned carriage prepaid to ALLEN & HEATH or its authorised agent with proof of purchase. Units returned should be packed to avoid transit damage. In certain territories the terms may vary. Check with your ALLEN & HEATH agent for any additional warranty which may apply.
For further assistance please contact our distributor or your territory.
http://www.allen-heath.com/UK/distributors.asp
DEVELOPMENT CHANGES
Release notes for this issue
CONTENTS
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SERVICING PRECAUTIONS AND GENERAL NOTES
PARTS IDENTIFICATION
How to order parts
Exterior parts
Interior parts
BLOCK DIAGRAM
CIRCUIT DIAGRAMS
SOFTWARE & FIRMWARE
SPECIFICATION
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DEVELOPMENT CHANGES
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PARTS IDENTIFICATION
Parts must be ordered from our distributor in your territory. A list of international distributors can be viewed at http://www.allen-heath.com/UK/distributors.asp
UK parts must be ordered through an appointed A&H dealer or service centre. A list of UK service centres can be viewed at http://www.allen-heath.com/UK/service_centres.asp
How to order parts
EXTERIOR PARTS:
Push button square red AJ2961JIT
Knob red AJ2074AJIT
Push button square grey AJ2864JIT
Knob green AJ2074AJIT
Knob grey AJ2078AJIT
Knob black AJ6106AJIT
Push button rect black AJ3228JIT
Push button rect grey AJ2865JIT
Knob brown AJ2080AJIT
Knob light blue AJ2075AJIT
Knob dark blue AJ2075AJIT
Knob yellow AJ2079AJIT
Push button square white AJ2960JIT
Push button rect white AJ2962JIT
Push button round black AJ4251JIT
Fader screw AB2811JIT
Fader knob black AJ3503JIT
Fader knob yellow AJ8080JIT
Fader knob light blue AJ8081JIT
Fader knob dark blue AJ6237JIT
Fader knob grey AJ6278JIT
Fader knob red AJ8079JIT
Fader knob brown AJ6692JIT
Fader knob green AJ6691JIT
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POTENTIOMETERS & FADERS
Gain AI3838
EQ frequency AI8005
EQ boost/cut AI8004
Aux 2 4 6 8 10 12 14 16
AI6718
Mono fader PCB assembly 003-613
EQ frequency AI8005
EQ boost/cut AI8004
HPF AI8009
Aux 1 3 5 7 9 11 13 15
AI8006
Mix master fader PCB assembly 003-614
Big headphone AL5903
Small headphone
3.5mm AL5323
Talkback AI8004
Osc/noise AI8111
Headphone AI8007
PFL trim AI8004
EXT IN AI8007
Attention
Alps faders shown. Some units may have Panasonic faders.
See page 9-13
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Ident strip 17-24 AK6474JIT
Feet AK0102JIT
XLR4 pin AL8104
XLR screw AB2810
Ident strip 9-16 AK6473JIT
Push button tall grey AJ8071JIT
Ident strip 1-8 AK6472JIT
1 234567 8
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INTERIOR PARTS:
Master connector 003-612JIT
Master 1 003-609JIT
Master 2 003-610JIT
Power connector 003-372JIT
Headphone socket AL6264
4M connector 003-611JIT
Screw (base) AB2809
Mono i/p 003-607JIT
Mix master 003-608JIT
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IDENTIFY PANASONIC FADERS / ALPS FADERS BY MIXER SERIAL NUMBER
List of mixer serial numbers using Panasonic Faders on Mix Masters to date 15109106:
L28MON24002847 L28MON32002932 L28MON32002934 L28MON32002935 L28MON32002936 L28MON40002944 L28MON40002945 L28MON24002949 L28MON24002950 L28MON40002951 L28MON40002952 L28MON48002983 L28MON32002985 L28MON24003012 L28MON24003013 L28MON24003014 L28MON24003015 L28MON32003017 L28MON32003019 L28MON40003026 L28MON40003027 L28MON40003028 L28MON40003031
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List of mixer serial numbers using Panasonic Faders on Mix Masters to date 5110106:
L28MON24002847 L28MON32002932 L28MON32002934 L28MON32002935 L28MON32002936 L28MON40002944 L28MON40002945 L28MON24002949 L28MON24002950 L28MON24003012 L28MON24003013 L28MON24003014 L28MON24003015 L28MON3200298s L28MON32003017 L28MON32003019 L28MON32003055 L28MON32003063 L28MON32003064 L28MON320031 13 L28MON40002951 L28MON40002952 L28MON48002983 L28MON40003026 L28MON40003027 L28MON40003028 L28MON40003029 L28MON40003031 L28MON40003048 L28MON40003052 L28MON40003055 L28MON400031 19
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GL2800Ms with Panasonic faders on whole mixer.
L28MON40003144 L28MON32003132 L28MON40003149 L28MON40003146 L28MON48003161 L28MON32003134 L28MON40003145 L28MON40003142 L28MON32003128 L28MON48003206 L28MON48003207 L28MON48003209 L28MON40003152 L28MON32003191
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SPECIFICATION:
Performance
Maximum XLR input level +34dBu (inc pad) Maximum XLR output level +26dBu Internal headroom Channels +20dB, Mix +22dB Master meters 12 segment -30 to +16dB, 0VU= +4dBu XLR Channel meters 4 segment -12,0,+6+16dB (5dB before clip) Frequency response 20Hz to 50kHz +0/-1dB Mic CMRR at 1kHz > 80dB typical THD+n at +14dBu 1kHz Mic to mix out < 0.003% Crosstalk at 1kHz Fader shutoff >90dB Mute shutoff >88dB Inter channel >90dB Noise, rms 22Hz to 22kHz Mic EIN -128dB Residual output noise < -96dBu (-100dB S/N) Mix noise 24 channels < -80dBu (-84dB S/N) Channel HPF Switched 100Hz, 12dB/octave Output HPF Swept off to 400Hz, 12dB/octave Channel EQ HF Shelving +/-15dB, 12kHz HM Peak/dip +/-15dB, 500Hz to 15kHz, Q=1.8 LM Peak/dip +/-15dB, 35Hz to 1kHz, Q=1.8 LF Shelving +/-15dB, 80Hz Mix 1-8 EQ HM Peak/dip +/-15dB, 500Hz to 12kHz, Q=1.6 LM Peak/dip +/-15dB, 80Hz to 2kHz, Q=1.6 Power supply External RPS11 IEC input External Input for optional RPS11 backup supply
Connections
Channel XLR balanced pin 2 hot Sensitivity -60 to +14dBu Total gain range 74dB 20dB Pad out 2k ohm, in >10k ohm Wedge Ext in XLR balanced pin 2 hot >10k ohm, 0dBu, +20dBu max IEM Ext in TRS unbalanced >10k ohm, 0dBu, +20dBu max Talkback mic XLR balanced pin 2 hot Sensitivity -50 to -10dBu Phantom power Internal jumper +48V (fitted) Inserts Channel TRS, tip send, ring return, 0dBu Output TRS, tip send, ring return, -2dBu Mix 1-16 out XLR balanced pin 2 hot <75 ohm, +4dBu, +26dBu max IEM/Wedge out XLR balanced pin 2 hot <75 ohm, +4dBu, +26dBu max Talkback/Osc out XLR balanced pin 2 hot <75 ohm, +4dBu, =26dBu max Headphones TRS, tip L, ring R, 30 to 600 ohm headphones recommended Lamp 4-pin XLR max 12V 5W lamp
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