Allen_&_Heath_GS1_Mixer_Service_Manual电路图.pdf

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1、GS1 SERVICE MANUAL PUBLICATION AP2064 compact 8 buss console RadioFans.CN 收音机爱 好者资料库 ALLEN & HEATH2S1SM1 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 s

2、ervice 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, ma

3、ins 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 respo

4、nsibility 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

5、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 dangero

6、us 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 you

7、r 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 IMPLEM

8、ENTATION 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 DIAG

9、RAMS 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). METERBRIDG

10、E PCB LAYOUT. METERBRIDGE CIRCUIT DIAGRAM. RadioFans.CN 收音机爱 好者资料库 ALLEN & HEATH3S1SM1 DIMENSIONS Dimensions packedunpackedpacked WDHKg(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. p

11、acked 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.

12、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 cold balanced . 2k ohms .variable -60 to -20dBu LINE IN .XLR

13、. pin 2 hot, 3 cold balanced . 25k ohms .variable -30 to +10dBu LINE IN .1/4 JACK . tip hot, ring gnd unbalanced . 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,

14、 +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 METERBRIDGE PSU EXPANDERGS1 RadioFans.C

15、N 收音机爱 好者资料库 ALLEN & HEATH4S1SM1 MAX OUTPUTS: . unbalanced +21 dBu 2kohms max load METERS: . 8 segment bargraphs for L,R -20VU to +6VU (peak) 0VU = +4dBu or -10dBV as selected FREQUENCY RESPONSE: 10Hz to 30kHz +0/-1dB DISTORTION: THD 0.006% Line in to mix out at 1kHz CROSSTALK: Interchannel better t

16、han -75 dB at 1kHz NOISE:. 22Hz to 22kHz MIC EIN -127 dB into 150 ohms LINE pre-amp at 0dB -88 dBu MIX noise -82 dBu POWER REQUIREMENTS: . 33VA max. at 50/60Hz External power supply with Mains input factory set for local requirements. Output supply on 5pin 240deg DIN 33Vac at 900mA PHANTOM POWER: .

17、+48V DC at 45mA generated internally Global +48V ON switch with individual channel disable links. 0 dBu = 0.775 Volts RMS 0 dBV = 1 Volt RMS Line level options: +4dBu (high level), -10dBV (low level) CONSTRUCTION:. All metal chassis with aluminium extrusions on front and sides. Moulded plastic end c

18、aps. TECHNICAL SPECIFICATION MIDI SPECIFICATION Transmitted Note The following message is transmitted for a mute key press: 9n kk v1 kk v2 n . - MIDI channel 16 (fixed) kk . - Note number (see Implementation tables) v1 . = 40H or more . Mute ON . = 3FH or less . Mute OFF v2 . = 0 Received Note 9n kk

19、 vv n . - MIDI channel (must be equal to 16) kk . - Note number (see Implementation tables) vv. = 40H or more . Mute ON . = 3FH or less . Mute OFF . = 0 . IGNORED Program Changes In Patch mode, pressing a function key will transmit MIDI Program Change messages as follows: Cn p where, n . - MIDI chan

20、nel = 16 p . - Program Change No. (see table Function keys in Patch mode) The console will also recall its stored Patches on receipt of the above message in any mode GS1 Expander Implementation table MUTEMIDI HEXDEC CHANNELNOTE EX 1 . G#1. 2C . 44 EX 2 . A1 . 2D . 45 EX 3 . A#1 . 2E . 46 EX 4 . B1 .

21、 2F . 47 EX 5 . C2. 30. 48 EX 6 . C#2. 31. 49 EX 7 . D2. 32. 50 EX 8 . D#2. 33. 51 Basic GS1 Implementation table MUTEMIDI HEXDEC CHANNELNOTE 1 . G#0. 20. 32 2 . A0 . 21. 33 3 . A#0 . 22. 34 4 . B0 . 23. 35 5 . C1. 24. 36 6 . C#1. 25. 37 7 . D1. 26. 38 8 . D#1. 27. 39 9 . E1 . 28. 40 10 . F1 . 29. 4

22、1 11 . F#1 . 2A . 42 12 . G1 . 2B . 43 Function keys in Patch mode Fkey Prog Change Message 1 . CF 00 2 . CF 01 3 . CF 02 4 . CF 03 5 . CF 04 6 . CF 05 Function keys in MIDI mode FKeyNameMIDI Mess. (Press)MIDI Mess. (Release) 1 . RECORD. 9F 5D 20 . 9F 5D 00 2 . STOP . 9F 5F 20 . 9F 5F 00 3 .PLAY . 9

23、F 5E 20 . 9F 5E 00 4 . REW. 9F 5B 20 . 9F 5B 00 5 . FWD. 9F 5C 20 . 9F 5C 00 6 . CYCLE . 9F 58 20. 9F 58 00 Function keys in MMC mode FKeyNameMMC Message 1 . LOCATE. F0, 7F, 7F, 06, 44, 02, 00, 08, F7 2 . STOP . F0, 7F, 7F, 06, 01, F7 3 .PLAY . F0, 7F, 7F, 06, 02, F7 4 . REW. F0, 7F, 7F, 06, 04, F7

24、5 . FWD. F0, 7F, 7F, 06, 05, F7 6 . SET LOCATE. F0, 7F, 7F, 06, 4C, 02, 08, 01, F7 ALLEN & HEATH5S1SM1 CONSOLE FUNCTIONAL CHECK The GS1 undergoes several rigorous stages of testing and quality control before being despatched from the factory. The following procedure is offered to the distributor, de

25、aler and customer to confirm that the unit has arrived without damage and in full working order. 1.Packing inspection 1.1Check that the packed unit is intact and has not suffered unreasonable transit damage. 1.2Carefully open the box and check the contents: GS1 console in polythene bag, power unit,

26、User Manual, Brochure, and orange Quality assurance card. 2.Cosmetic inspection 2.1Carefully unpack the unit and check general cosmetic quality. Check that the plastic end caps and front armrest are securely attached. 2.2Set the controls ready for the electrical tests which follow: All faders down,

27、Gains min, EQ mid, Aux min, Level min, Pan mid, switches up. 3.Power-up and initial LED test 3.1Check that the power unit is marked with the correct mains voltage. Plug the power unit DIN connector into the GS1 AC 36V socket. Plug the power unit mains connector into the local mains outlet. 3.2Apply

28、mains power. Check that the MMC LED to the left of the mode switch lights. Press the MODE switch and check that the MMC, PATCH and MIDI LEDs light in turn. 3.3Press each CHANNEL ON switch in turn lighting the green ON LED. Press again to turn the channel off. 3.4Press each PFL switch and check that

29、the red PFL ACTIVE LED lights in each case. 3.5Press the Microphone PHANTOM POWER switch checking that the red PHANTOM POWER LED lights. Measure +48V nominal between pin 3 (+ve) and pin 1 (-ve) and between pin 2 (+ve) and pin 1 of each mic XLR. 4.Patch Learn check 4.1Press the MODE switch to select

30、Patch mode. Press the LEARN switch. The LEARN LED should flash. 4.2Turn all channels ON. Press MMC Function Key F1. Now press LEARN again. The Learn LED should go out. This has stored a patch with all channels on which is recalled by pressing function key F1. 4.3Turn all channels off. Test that pres

31、sing F1 turns all channels on. 4.4Remove power from the GS1. Wait about 30 seconds and power on again. Select Patch mode and check that the patch F1 has been remembered with power removed. 5.Signal test The following tests check the audio inputs and outputs for signal flow and quality. This does not

32、 test every routing combination but does check that all circuit blocks and input/output connections are working. The equipment suggested includes a CD player with known good quality music or test signal material, and a stereo amplifier with high quality loudspeakers. Where further technical equipmen

33、t is available, more accurate and comprehensive testing is possible using a sinewave signal source, dB voltmeter and oscilloscope. This requires the necessary level of technical competence. 5.1Plug CD player left output into TAPE RTN on Channel 1. Start CD playing and raise L-R fader to 0, and raise Channel 1 TAPE RTN Level pot until the L, R meters both read an average 0 (first red LED). Press the meters Lo switch to check that the meter reading decreases to average around -10. 5.2Co