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ALLEN & HEATH GL4800 Service Information
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ALLEN & HEATH GL4800 Service Information

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SERVICE INFORMATION
Publication AP6151

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Summary of Contents for ALLEN & HEATH GL4800

  • Page 1 SERVICE INFORMATION Publication AP6151...
  • Page 2 Introduction This publication provides technical information on servicing the Allen & Heath GL4800. Included are internal layout drawing, block diagram and circuit schematics with board layouts and spare parts lists. Whilst we believe this information to be reliable we do not assume responsibility for inaccuracies.
  • Page 3 Technology: The GL4800 uses conventional thru-hole and SMT (surface mount) PCB technology. In certain cases it may be better to replace a faulty assembly rather than try to fix it without the appropriate tools and training.
  • Page 4 Contents Log Internal Layout drawing ............gl4800_layout_1.pdf Surface and Main Parts ..............gl4800_parts_1.pdf System Block Diagram ..........gl4800_blockdiagram_1.pdf Master PCB ..............gl4800_002-165_master_2.pdf Slave PCB ..............gl4800_002-167_slave_1.pdf MPU PCB ..............gl4800_002-198_mpu_2.pdf Mono Input PCB ........... gl4800_003-410_mono_input_2.1.pdf Stereo Input PCB ..........gl4800_003-411_stereo_input_3.1.pdf Group PCB (A,B & C) ......gl4800_003-412_413_414_group_3.3.pdf Mono PCB...............
  • Page 5 R114 1R0 PF G6_MIX G3_MIX G4_MIX G1_MIX R111 G2_MIX 1R0 PF 10K 1% ALLEN&HEATH ISSUE BY DATE GL4800 MONO INPUT 22-03-05 TITLE: Kernick Industrial Estate, Penryn, Cornwall, PAGE: England. TR10 9LU Tel: +44 (0)8707 556250 AG2621 DRG No: ISSUE: SHEET:...
  • Page 6 IC2D 100K LM339 M_MIX S14B LED T1 3MM GREEN R116 820R 1% MUTE ALLEN&HEATH ISSUE BY DATE GL4800 MONO INPUT 22-03-05 TITLE: Kernick Industrial Estate, Penryn, Cornwall, PAGE: England. TR10 9LU Tel: +44 (0)8707 556250 AG2621 DRG No: ISSUE: SHEET:...
  • Page 7 003-410 iss.2.1...
  • Page 8 GL4800 003-411 iss.3.1...
  • Page 9 003-411 iss.3.1...
  • Page 10 JP100_6 JACK V3M R103_7 0VA6 0VA7 0VA8 LINK OPT LINK OPT LINK OPT ALLEN&HEATH ISSUE BY DATE GL4800 IN8M CONN PCB TITLE: 05-01-05 Kernick Industrial Estate, 23-03-05 Penryn, Cornwall, PAGE: England. TR10 9LU Tel: +44 (0)8707 556250 C6075 Fax: +44 (0)8707 556251...
  • Page 11 LINK OPT SAFE4 SAFE3 LINK OPT 4099B SAFE2 BANK ASSIGN SAFE1 ALLEN&HEATH ISSUE BY DATE GL4800 IN8M CONN PCB TITLE: 05-01-05 XXX Kernick Industrial Estate, 23-03-05 XXX Penryn, Cornwall, PAGE: England. TR10 9LU Tel: +44 (0)8707 556250 C6075 DRG No:...
  • Page 12 003-416 iss.2...
  • Page 13 STEREO CHANNEL 1 STEREO CHANNEL 2 STEREO CHANNEL 3 STEREO CHANNEL 4 CN104 CN105 CN104_1 CN105_1 CN104_2 CN105_2 CN104_3 CN105_3 L100 L100_1 L100_2 L100_3 MUTE1 MUTE2 MUTE3 MUTE4 SAFE1 SAFE2 SAFE3 SAFE4 C102 MLED1 C102_1 MLED2 C102_2 MLED3 C102_3 MLED4 L101 L101_1 L101_2...
  • Page 14 LK13 LK19 LK25 LK31 LK37 470K MUTE8 TC LINK TC LINK TC LINK TC LINK TC LINK TC LINK LINK TCW 470K LK14 LK20 LK26 LK32 LK38 MUTE7 470K TC LINK TC LINK TC LINK TC LINK TC LINK TC LINK LINK TCW MUTE6 LK15...
  • Page 15 003-419 iss.2...
  • Page 16 JP100_6 R103_7 0VA6 0VA7 0VA8 LINK OPT LINK OPT LINK OPT PIN-SOLDER 1.5MM ALLEN&HEATH ISSUE BY DATE GL4800 SM CONN PCB TITLE: 05-01-05 Kernick Industrial Estate, 29-03-05 Penryn, Cornwall, PAGE: England. TR10 9LU Tel: +44 (0)8707 556250 C6077 Fax: +44 (0)8707 556251...
  • Page 17 LINK OPT SAFE4 SAFE3 LINK OPT 4099B SAFE2 BANK ASSIGN SAFE1 ALLEN&HEATH ISSUE BY DATE GL4800 SM CONN PCB TITLE: 05-01-05 XXX Kernick Industrial Estate, 29-03-05 XXX Penryn, Cornwall, PAGE: England. TR10 9LU Tel: +44 (0)8707 556250 C6077 DRG No:...
  • Page 18 003-417 iss.2...
  • Page 19 0VA2 0VA3 0VA4 0VA5 LINK OPT LINK OPT LINK OPT LINK OPT PIN-SOLDER 1.5MM ALLEN&HEATH ISSUE BY DATE GL4800 MS CONN PCB TITLE: 05-01-05 Kernick Industrial Estate, 29-03-05 Penryn, Cornwall, PAGE: England. TR10 9LU Tel: +44 (0)8707 556250 C6078 Fax:...
  • Page 20 LINK OPT SAFE4 SAFE3 LINK OPT 4099B SAFE2 BANK ASSIGN SAFE1 ALLEN&HEATH ISSUE BY DATE GL4800 MS CONN PCB TITLE: 05-01-05 XXX Kernick Industrial Estate, 29-03-05 XXX Penryn, Cornwall, PAGE: England. TR10 9LU Tel: +44 (0)8707 556250 C6078 DRG No:...
  • Page 21 003-418 iss.2...
  • Page 22 J2 NF LINK OPT JP10B NF LINK OPT MTR_6 PIN-SOLDER 1.2MM C52 330P/DISK MTR_SND ALLEN&HEATH 15/03/04 CONVERTED TO PROTEL ISSUE BY DATE GL4800 GROUP PCB TITLE: Kernick Industrial Estate, Penryn, Cornwall, PAGE: England. TR10 9LU Tel: +44 (0)1326 372070 AG2623 DRG No:...
  • Page 23 L_MIX FB30 FB-TH FEED TO SYSLINK VR2A R_MIX R171-1 R137 10K 1% POT11 20KK IC1 REPLACED BY 2 SIL 4 CONNS FOR GL4800 SUP PCB ALLEN&HEATH 15/03/04 CONVERTED TO PROTEL SIL1 SIL2 ISSUE BY DATE NOTE GL4800 GROUP PCB TITLE:...
  • Page 24 1/63 ALLEN&HEATH 15/03/04 CONVERTED TO PROTEL ISSUE BY DATE NOTE GL4800 GROUP PCB TITLE: Kernick Industrial Estate, FOR FB1 - FB30, R171 GROUP-L/R ASSIGNMENT REFER TO TABLE ON PAGE 1 Penryn, Cornwall, PAGE: FOR FITTED AND NON FITTED COMPONENTS SEE TABLE ON PAGE 1 England.
  • Page 25 GL4800 003-415 iss.3.2...
  • Page 26 GL4800 003-415 iss.3.2...
  • Page 27 003-415 iss.3.2...
  • Page 28 003-412 / 413 / 414 iss.3.3...
  • Page 29 GL4800 002-165 iss.2...
  • Page 30 GL4800 002-165 iss.2...
  • Page 31 002-165 iss.2...
  • Page 32 GL4800 002-167 iss.1...
  • Page 33 002-167 iss.1...
  • Page 34 XLR NC3MAV20 0VA4 XLR NC3MAV20 0VA5 PIN-SOLDER 1.5MM PIN-SOLDER 1.5MM PIN-SOLDER 1.5MM PIN-SOLDER 1.5MM ALLEN&HEATH ISSUE BY DATE GL4800 MASCO PCB TITLE: 05-01-05 XXX Kernick Industrial Estate, 02-03-05 XXX Penryn, Cornwall, PAGE: 23-03-05 XXX England. TR10 9LU Tel: +44 (0)1326 372070...
  • Page 35 JACK V3M JACK V3M JACK V3M JACK V3M 0VA9 0VA9 0VA9 0VA9 ALLEN&HEATH ISSUE BY DATE GL4800 MASCO PCB TITLE: 05-01-05 XXX Kernick Industrial Estate, 02-03-05 XXX Penryn, Cornwall, PAGE: 23-03-05 XXX England. TR10 9LU Tel: +44 (0)1326 372070 C6079...
  • Page 36 JACK V3M JACK V3M 47/25 R124 P110 R106 0VA9 0VA10 PIN-SOLDER 1.5MM ALLEN&HEATH ISSUE BY DATE GL4800 MASCO PCB TITLE: 05-01-05 XXX Kernick Industrial Estate, 02-03-05 XXX Penryn, Cornwall, PAGE: 23-03-05 XXX England. TR10 9LU Tel: +44 (0)1326 372070 C6079...
  • Page 37 003-420 iss.3...
  • Page 38 1N4002 PIN-SOLDER 1.5MM PIN-SOLDER 1.5MM P13 PIN-SOLDER 1.5MM P14 PIN-SOLDER 1.5MM HOLE-AI SLOT-AI ALLEN&HEATH ISSUE BY DATE GL4800 POWER CONN PCB TITLE: MG 25/02/05 Kernick Industrial Estate, Penryn, Cornwall, PAGE: England. TR10 9LU Tel: +44 (0)1326 372070 6161 DRG No:...
  • Page 39 003-423 iss.B...
  • Page 40 10K 0.5% 0805 TF NF CAPEL 0.200/0.175 33/25_S 0R0 0805 NF RES SMD0805 NF CAPEL 0.200/0.175 ALLEN&HEATH ISSUE BY DATE GL4800 MIX AMP SUB PCB TITLE: MG 02/03/05 Kernick Industrial Estate, Penryn, Cornwall, PAGE: England. TR10 9LU Tel: +44 (0)1326 372070...
  • Page 41 003-452 iss.1...
  • Page 42 GL4800 002-198 iss.2...
  • Page 43 GL4800 002-198 iss.2...
  • Page 44 002-198 iss.2...
  • Page 45 LINK OPT V_DIV_REFA V_DIV_REFA METER VU METER VU METER VU LM393 LM393 LINK OPT METER VU METER VU METER VU 100K 100K 1N4148 1N4148 GRP1/7 TL072 GRP4/L TL072 10/16 10/16 1N4148 1N4148 PR VA 10K PR VA 10K 10/16 10/16 V_DIV_REFA V_DIV_REFA BLGND...
  • Page 46 LK11 LK16 LK21 LK26 LINK TCW LINK TCW LINK TCW LINK TCW LINK TCW LINK TCW LK12 LK17 LK22 LK27 LINK TCW LINK TCW LINK TCW LINK TCW LINK TCW LINK TCW LK13 LK18 LK23 LK28 LINK TCW LINK TCW LINK TCW LINK TCW LINK TCW...
  • Page 47 GL Meters iss.3...
  • Page 48 GL4800 Internal Layout (GL4800-824B shown) Product ......GL4800-824m ........GL4800-832m ........GL4800-840m 16WAY RIGHT ........GL4800-848m 16WAY LEFT HAND HARNESS 4SM CONNECTOR PCB POWER CONNECTOR PCB MASTER CONNECTOR PCB HAND HARNESS 8M CONNECTOR PCB GL4800-824 AL2760 12WAY FLEX CABLE AH2228 003-417 003-423 003-416 003-420...
  • Page 49 GL4800 Surface Parts 9MM POT NUT AB8050 Buttons and Knobs LAMP LATCHING SWITCH AL0162 LATCHING SWITCH AL0162 +48V +48V 11MM 20KK POT AI8003 11MM 20KK POT AI8003 4PIN FEMALE XLR AL8104 2TRK RETURN LATCHING SWITCH AL0162 LATCHING SWITCH AL0162 POLARITY...
  • Page 50 GL4800 Surface Parts (GL4800-824B shown) 5PIN DIN SOCKET AL0095 JACK SOCKET SWITCHED AL3410 BLANKING PLATE AA4659 MOMENTARY SWITCH AL0374 (CONSOLE SHOWN WITH JACK SOCKET UNSWITCHED AL3407 JACK SOCKET SWITCHED AL3410 JACK SOCKET UNSWITCHED AL3407 JACK SOCKET UNSWITCHED AL3407 JACK SOCKET SWITCHED AL3410...
  • Page 51 GL4800 SYSTEM BLOCK DIAGRAM =SYSLINK INPUT OPTION 2-TRACK RETURN PEAK REPLAY TO L-R 4-BAND FULL SWEEP EQUALISER OUTPUT REVERSE (LR2 / AUX 9-10) L(R)2 OUT MIC/ LINE FADER STEREO PFL LINE IN LO-CUT MONO -20dBu GAIN FILTER L(R)2 0dBu IMPEDANCE BALANCED...