Service Manual 400RB
Contents
1. 15 16 17 18 019 R36 R37 R20 R23 R11 R8 R10 R13 R15 R16 R19 R35 R1 R3 R4 R31 R7 R12 R21 R22 R28 R29 R32 R2 R5 R6 R33 R34 R17 R18 R14 P2 3 4 5 6 7 P1 QTY REF DESIG 3 U1 U2 U3 1 U4 1 Q80 4 D8 D10 D69 D71 2 C6 C29 3 2 C41 C61 3 C35 C39 C55 2 C22 C24 1 C49 2 C16 C17 2 C7 C20 LVL 2 031 1227 0 2 031 2335 0 2 032 3104 0 2 038 0106 0 2 038 2105 A 2 051 1002 0 2 051 1005 0 2 051 1203 0 2 051 1204 0 2 051 2201 0 2 051 2202 0 2 051 2203 0 2 051 2204 0 2 051 3302 0 2 051 3303 0 2 051 4701 0 2 051 4702 0 2 051 4703 0 2 051 4704 0 2 051 5602 0 2 051 5603 0 2 052 0000 0 2 070 1513 0 2 070 1514 0 2 070 1522 0 2 090 0014 0 2 092 0076 0 2 093 0028 0 2 093 0029 0 2 145 0047 E DESCRIPTION CAP ELEC RAD 227 10 50 25V CAP ELEC RAD 335 20 50V CAP PE 104 5 63V CAP ELEC AXIAL TR 106 20 16V CAP ELEC AXIAL TR 105 20 50V RES CARBON FILM 1K OHM 1 4W 5 RES CARBON FILM 1M OHM 1 4W 5 RES CARBON FILM 12K OHM 1 4W 5 RES CARBON FILM 120K OHM 1 4W 5 RES CARBON FILM 220 OHM 1 4W 5 RES CARBON FILM 2 2K OHM 1 4W 5 RES CARBON FILM 22K OHM 1 4W 5 RES CARBON FILM 220K OHM 1 4W 5 RES CARBON FILM 3 3K OHM 1 4W 5 RES CARBON FILM 33K OHM 1 4W 5 RES CARBON FILM 470 OHM 1 4W 5 RES CARBON FILM 4 7K OHM 1 4W 5 RES CARBON FILM 47K OHM 1 4W 5 RES CARBON FILM 470K OHM 1 4W 5 RES CARBON FILM 5 6K OHM2. 1 4W 5 RES CARBON FILM 56K OHM 1 4W 5 RES CARBON FILM 0 OHM 1 4W 5 POT 50K 15A 7MM KNURL 1W POT 50KB 7MM KNURL 1W POT 2KB 7MM KNURL 1W SWITCH PP DPDT 2A BREAK MAKE PC JACK S2 BNB 1 4 5 TERM HDR 156X3 VERT MALE HDR 156X4 VERT MALE LOCK ROUND 400RB PREAMP BRD QTY REF DESIG C65 C66 C60 C68 c2 C11 C72 C82 C84 C87 R73 R83A R4 R1 R13 R34 R38 R42 R47 R83 R15 R62 R75 R77A R88 R31 R58 R19 R21 R23 R5 R18 R78 R86 R70 R81 R3 R30 R85 R40 R48 R57 R79 R28 R33 R37 R43 R50 R27 R44 R51 R56 R59 R9 R12 R32 R52 R54 R64 R77 R75A R76A R14 volume R36 R53 R63 R67 R89 EQ master pots R76 boost 51 52 53 54 all switches J1 J2 all jacks P2 P1
3. 12 With power switch on gradually turn up variac to 50V while listening to speaker and watching scope and ammeter Output should go negative then snap back to 0 Check regulated supplies or 14 5V or 1 V Adjust variac to 120V and turn speaker off Set Bias Adjust 14 41 board for 5mV across R26 R27 Power LED and boost LED should be lit Connect oscillator to input 200Hz amp 46 dBV Turn on 4 ohm load Adjust volume for slight clipping 2 3 o clock Output 28 Vrms Engage 10dB switch Output becomes 5 7 Vrms Disengage switch Turn boost to 0 Output becomes 3 Vrms Turn master to 0 Output becomes OV Turn load off Tones and Filter Test Set all knobs to center 12 o clock switches out Set scope B to 5V cm and 1 ms cm Set oscillator to 200Hz square wave at 46 dB V Look at output compare to figure 1 One ata time turn tone control knobs and compare output to figures resetting to center after finishing A Treble to 10 Fig 2 Treble to 0 Fig 3 B Hi mid to 10 Fig 4 Hi mid to 0 Fig 5 C Lo mid to 10 Fig 6 Lo mid to 0 Fig 7 D Bass to 10 Fig 8 Bass to 0 Fig 9 Engage low cut switch compare to Fig 10 Disengage Engage contour switch compare to Fig 11 Disengage 2 3 4 5 6 7 8 Turn front panel knobs to 10 switches out Connect front speaker to output and listen to noise It should be smooth not crackling Change AC voltage range to 1 V Noise should mea
4. 12K DIRECT OUT J6 V 100K 470 NOTES SUNLESS OTHERWISE SPECIFIED G3 MOUNTED ON HEATSINK ADJUST BIAS FOR SMV ACROSS EACH 26 AND R27 DENOTES RMS VOLTAGE U1 IS LF351 ON A BOARD C2A 240V POWER F504 4A 120v 50 60 2 080 0012 0014 240V GK DOCUMENT ma RE 406 0041 MODEL 8 DESCRIPTION GRLLIEN KRUEGER POWER AMP POWER SUPPLY SCHEMATIC DBF DESIGNED BY PART 406 PCO DATE FROM SN TO SN p PE I DI 60041C R A G 0041A 0041C 603 0004 3 10 8210 6 311199 goa WwaoganudM Nathuve 925 leh d2 0911 NESZ S 2 10 95 bSLNI 442214 ro anas 1 452 IEH NESEJI einen vanen SNILW3ANI NON 4104100 Y Nani E v104100 400 5831 4 WV Ol 15008 NO ONY my AV NIS 24902 W NO LIONO 1531 3178341 1 452 ve 915 210 ssvg GIW 0 7152 523 250911 340 o 01 e ZN wi SZ 2a X ig gt NO Mel NALLY 1 009 S6SIINS or 10 3514 zHOS AOb L2H 92M SSOu2v AWOI Mod SVG LSNEGY NO G2LNNOW 0 m 4 MI gt 818 gt po
5. 24 LVL LVL 2 2 PART 130 0063 0 130 0064 0 132 0314 E 120 0005 0 132 0317 A 120 0006 0 132 0318 A 120 0006 0 132 0565 0 114 6056 0 120 0011 0 132 0567 0 120 0005 0 132 0568 0 120 0005 0 132 0569 0 120 0005 0 132 0575 0 120 0005 0 150 0012 0 150 0013 0 160 0002 0 PART 001 1030 0 010 0012 0 010 1013 0 020 0160 0 020 2105 0 030 2101 0 DESCRIPTION 400RB FRONT PANEL OVERLAY 400RB REAR PANEL OVERLAY 400RB II REAR PANEL ALUM 100 400RB 200W UPPER SINK ALUM 125 400RB 200W LOWER SINK ALUM 125 400RB II FRONT PANEL NUT 10 32 PRESS FOR STEEL STEEL 18 GAUGE JET COAT 048 400RB II RIGHT SIDE ALUM 100 400RB II LEFT SIDE ALUM 100 400RB II COVER ALUM 100 400RB II RACK EAR ALUM 100 400 800 400 MANUAL 400RB 206 0041 C 400RB Power Amp DESCRIPTION LF353N DUAL JFET OP AMP MPSA06 NPN 80V 500MA TO 92 MPSA56 PNP 80V 500MA TO 92 1N966B ZENER 16V 5 400MW DO 35 1N4002 RECT 1A 150V DO 41 CAP CER AX 101 10 50V NPO QTY D1 D2 D3 D4 D5 D6 QTY DESIG 102 44 44 114 49 49 320 21 LVL 030 2103 0 030 2104 0 030 2470 0 030 2561 0 031 2227 0 038 0106 0 038 3477 0 051 0101 0 051 0221 0 051 1001 0 051 1002 0 051 1004 0 051 1005 0 051 1203 0 051 3302 0 051 4701 0 051 5602 0 051 5603 0 052 0000 0 05
6. of 2 sides GALLIEN TECHNOLOGY _ 408 441 8081 2240 Paragon Dr San Jose CA 95131 Fax 408 441 8085 ECO SUPPLEMENT CUSTOMER LEVEL 0 System DATE DESC Board ORIGINATOR ASSY REV LJ Fab REASON FOR CHANGE Continued from Page Continued on ECO supplement page DESCRIPTION OF CHANGE Continued from Page Continued on ECO supplement page TOTAL PARTS ADDED TOTAL PARTS DELETED PART DESCRIPTION QTY REF DES PART DESCRIPTION REF DES 2259 271 Fokus 225 GALLIEN TECHNOLOGY 1408 441 8081 ECO 2240 Paragon Dr San Jose CA 95131 Fax 408 441 8085 777 ENGINEERING CHANGE ORDER LEVEL 7 System DATE 6 95 Board ORIGINATOR 7 8 6 d REV D CJ Fab SJEFFECTIVE _ PENDING APPROVAL STOMER alls EZ Next production Run Pending Reject Reason Engineering 7 7 0 1 85 EJA in Proces me Jan in Stock Ja being Serviced Type of Changes sen 22120122 Potters 4 2 old onore improvement RE mgl 05 kor Cost accounting REASON FOR CHANGE AFFECTED AREA Armat X east art thy 28 m toni jur 9960 use a SL matte naj ee Componente 201 Ano andy Han and Veut uN d bra ok DE Bee m Used on Ar KON DIG board nol eqo ers of EC o 11 is ange Continued on ECO supplement pag 5 CQ Artw
7. b 3 delolo Z on at RISA RIA Comp Control Form PS Assembly Drawing L Test Procedure Fab Drawing ee Codst 86 L ISilkscreen L IPunch P Continued on ECO supplement page RET TOTAL PARTS ADDED TOTAL PARTS DELETED PART DESCRIPTION REF DES PART DESCRIPTION QTY REF DES 2 b uswe soto pot lt EZ 207 kB Imm I RU FEE KE RN AE EEE EN MG DISTRIBUTION b lt Engineering L Material Production Fabrication Others FORM REV A 12 7 93 Page of LVL 6 22 99 PART 010 0012 0 011 0002 0 011 0007 0 011 1008 0 013 0018 0 013 1019 0 023 0108 0 056 330 0 056 0500 0 080 0012 0 090 0008 0 091 0005 0 092 0002 0 092 0004 0 092 0011 0 092 0064 0 093 0014 0 093 0032 0 093 0035 0 094 0013 0 094 0020 0 095 0005 0 100 0000 0 400RB II INDENTED BILL OF MATERIALS Main assembly numbers are in bold face Most commonly needed parts are italicized DESCRIPTION MPSAO06 NPN 80V 500MA TO 92 TIP31C NPN 80V 3A TO 220 MJE15030 NPN 150V 8A TO 220 MJE15031 PNP 150V 8A TO 220 MJ 15001 NPN 140V 15A TO 3 MJ 15002 PNP 140V 15A TO 3 KBPC 602 BRIDGE RECT 6A 200V C216A RES CERAMIC WW 33 OHM 5W 10 RES CERAMIC WW 5 OHM 5W 10 TRANSFORMER 200W 120V Z 4 SWITCH ROCKER SPST 4A QUICK TERM FUSE 5A 125V 1 4X1 1 4 SLB JACK SW 11 1 4 0 TIP SLDR TERM JACK SW
8. 4 2702 0 070 0508 0 092 0066 0 093 0029 0 145 0041 C PART 001 1030 0 001 3029 0 010 2010 0 020 0120 0 030 2101 0 030 2103 0 030 2104 0 030 2222 0 030 2224 0 030 2470 0 030 2472 0 030 2561 0 CAP CER AX 103 10 50V X7R CAP CER AX 104 10 50V X7R CAP CER AXIAL 47 PF 10 50V NPO AXIAL 561 10 50V X7R CAP ELEC RAD 227 10 50 50V CAP ELEC AXIAL TR 106 20 16V CAP ELEC AXIAL 477 10 50 63V RES CARBON FILM 10 OHM 1 4W 5 RES CARBON FILM 22 OHM 1 4W 5 RES CARBON FILM 100 OHM 1 4W 5 RES CARBON FILM 1K OHM 1 4W 5 RES CARBON FILM 100K OHM 1 4W 5 RES CARBON FILM 1M OHM 1 4W 5 RES CARBON FILM 12K OHM 1 4W 5 RES CARBON FILM 3 3K OHM 1 4W 5 RES CARBON FILM 470 OHM 1 4W 5 RES CARBON FILM 5 6K OHM 1 4W 5 RES CARBON FILM 56K OHM 1 4W 5 RES CARBON FILM 0 OHM 1 4W 5 RES CARBON FILM 2 7K OHM 1W 5 POT 1K TRIM 6MM SLOT 3W FASTON M PC 250 HDR 156X4 VERT MALE LOCK ROUND 400RB POWER AMP BOARD 206 0047 E 400RB Preamp DESCRIPTION LF353N DUAL JFET OP AMP DG419DJ DUAL COMP ANALOG SWITCH 4113 N JFET 35V 2MA TO 92 1N759A ZENER 12V 5 400MW DO 35 CAP CER AX 101 10 50V NPO CAP CER AX 103 10 50V X7R CAP CER AX 104 10 50V X7R CAP CER AX 222 10 50V X7R CAP CER AXIAL 224 20 50V Z5U AXIAL 47 PF 10 50V NPO CAP CER AXIAL 472 10 50V X7R AXIAL 561 10 50V X7R C4 C1 C6 C5 C8 C10 C7 C2 C9 C11 12 13 014
9. EEE DRAWING S SHOWING MODIFICATION ATTACHED R NO D YES SPECIFY La Ll Yoh me DEPT 4 DATE 2 1 93 REVIEWED APPROVED BY UV DEPT DATE PCOFORM i ee GALLIEN TECHNOLOGY 408 441 8081 ECOZ 2240 Paragon Dr San Jose CA 95131 Fax 4081 441 8085 MODEL ENGINEERING CHANGE ORDER STOMER LEVEL System DATE 2 4 57 E Board ORIGINATOR J Pare Fab LOPENDNG ___ Taova Next production Run in Process EE O U JAN in Stock Production being Serviced T s m when nola Sfmprovement Fer for pu bondo REASON x CH ANGE To ur La ce TE GO uf 114 264 4 AFFECTED AREA S4Schematic Cg Artwork sil of Material Continued on ECO supplement page DESCRIPTION OF CHANGE Doardl vo M mb 26 44 ZTM elu aia C4 2 5 Comp Control Form Drawing TTest Procedure Drawing E Silkscreen _ Punch Program Continued on ECO supplement page TOTAL PARTS ADDED TOTAL PARTS DELETED PART DESCRIPTION REF DES DESCRIPTION REF DES lod cos 1212 DISTRIBUTION Production LL drabrication L Others FORMS REV A 12 7 93 Page __
10. L11 1 4 0 TIP SLDR TERM LONG JACK SW L12A 1 4 S TIP LONG Q CON 25 TAB 18 22GA INSULATED RECEPTACLE AC Q TERM HOUSING 3X 156 FEMALE 22GA LOCK HOUSING 4X 156 FEMALE 22GA LOCK HOLDER FUSE 1 4 X 1 1 4 Q TERM SOLDER LUG 10 POWER CORD 117V PLUG DETACH INSULATOR MICA 56 03 2AP TO3 Level 1 refers to main asy Level 2 refers to board pts QTY REF DESIG LVL PART ff 100 0020 0 100 0030 0 100 0031 0 100 0032 0 100 0033 0 100 0037 0 100 0041 0 100 0042 0 100 0076 0 100 0102 0 100 0103 0 112 0081 0 112 0101 0 112 0121 0 112 4081 0 112 6001 0 112 8060 0 112 9060 0 112 9101 0 114 0080 0 114 1060 0 114 6001 0 115 7005 0 115 7021 0 130 0022 DESCRIPTION BUMPER ROUND RUBBER 1 2 X 14 BUTTON RECT BLACK CAP PUSH SWITCH WASHER M RECT TO 220 MGT INSULATOR MICA 56 77 11 AP TO 220 CABLE TIE PLT 1M M SMALL HEAT CLIP TO 98 WIRE HOLDER N 4 HANDLE RUBBER 6 5 FOOT RUBBER ROUND 5 8DIA X 5 8 72 APLS SPLINE SHAFT KNOB 72 APLS SPLINE SHAFT BOLT 6 32 1 2 PHP CAD BOLT 6 32 5 8 PHP CAD BOLT 6 32 3 4 PHP CAD SCREW 6AB 1 2 FHP 82 CAD NUT 6 32 KEP LARG SIZE CAD TR BOLT 6 32 3 8 PHP B O TR BOLT 6 32 3 8 FHP B O TR BOLT 6 32 5 8 FHP CAD BOLT 10 32 1 2 PHP B O BOLT 10 32 3 8 FHP 82 B O NUT 10 32 KEP CAD WASHER 3 8 FIBRE FLAT WASHER 3 8 INTERNAL CAD 200W HEAT SINK QTY REFDESIG 13
11. NS BALL O100V 1120 Deeov Ne40v 05042 06092 TYPE OF CHANGE O NECESSARY TO THE FUNCTION OF THE UNIT OR ADDITION TO THE UNIT amp OTHER Done for CSA Rpprova CHANGE TO BE IMPLEMENTED TO REMARKS NEXT PRODUCTION RUN GND 1 ALL UNITS IN PRODUCTION D ALL UNITS IN STOCK ALL UNITS BEING SERVICED OTHER o BEGINNING SERIAL NUMBER AFFECTED DESCRIPTION OF CHANGE O SEE PCO SUPPLEMENTS O CONTINUED ON PCO SUPPLEMENT PAGE When o Power supply wwe fr en l ter mval of AC veceptical o the power Switch then wire from me power Switch to the end bus Me Luse holder Then from the other lua of the fuse holder to the tramsformec The wire frem he reve goes divvectly the transformer REASON FOR CHANGE 1 ad CSA veguires These Charge 5 Xov approval PARTS ADDED PARTS DELETED DESCRIPTION REF DES D CONTINUED ON PAGE CONTINUED PAGE ____ AFFECTED AREAS DONE BY DATE O CIRCUIT SCHEMATIC ID D BILL OF MATERIAL 10 O AUTO INSERTER IG M SAMPLE CHANGE DOCUMENT DIST LIST COPIES O TEST PROCEDURE 10 GK USA D COMP CONTROL FORM SERVICE CENTERS 0 FAB DRAWING TOG EUROPE O PUNCH PROGRAM ___ GK CAMPBELL D PUNCH SAMLE 10 ENGINEERING D ASSEMBLY PROCEDURES 10 FABRICATION D ARTWORK PRODUCTION D SILKSCREEN TEMPLATE 1 OUTSIDE SUPPLIERS SE MN ULM
12. Service Manual 400 GALLIEN KRUEGER Table of Contents Operating Instructions Turn On Calibration Procedure Schematics Engineering Change Orders ECOs Bill of Materials N O O w OPERATORS MANUAL 400RB THE BASICS Your new 400RB represents the latest advances that technology has to offer It was designed to provide the widest possible range of usable sounds The combination of three voicing filters with four bands of active EQ is unbeatable for flexibility and ease of operation This amplifier has many features all of which are described here A careful examination of this manual will help you to get the most from them INPUT SECTION This section contains the 1 4 input jack and the input atten uator With the attenuator out the maximum input level is 1V rms 3V P P For larger input signals the input attenuator should be set This reduces the gain of the input stage by 10 dB increasing the input head room to 3V rms 10 P P EFFECTS LOOP Located on the rear panel it is provided for the insertion of effects It is post EQ but pre boost and master Using standard guitar cords connect the effects input to the send and the effects output to the return The boost and master controls will effect any signal put into the return jack The level is 1 5V rms 4 5V P P into 100K ohm Send Return Effects Device s Input Output DIRECT OUT This output will put 500mv into 600 ohms unba
13. are 4005 UN Tame wwe 2n YIMOHd 5 MI 91H 9 cu L 2 om 100 6 Le 996 NI 200 NI 954 E 2 1a ZN J21 WOOI me is 209 2ddAM on NISE 41 in Uh J GIE dIL cib p 20051 W 2 10051 cw 680 45 rs OE OG 1 30N 16 on lik 55 9Sv SdW SI 9 45 52 IEOSI 3EW 01 2 v 90V Sdw 56 ro 09 29 BO AC SO 29 uo 7 00 R i gt 8 R e GD e gt E e 8 E 8 4h00 Ghl 3008 440344 84005 MIN 01141405 0 9405 5403 330 311109 NMOHS 3015 104403 Traces Values Ref desig 149 0044 D Eu 148 0043 0 Eu zum 269 G bu 8 52 0 400 02 issu Bl JER 80 GC NST TRS SF edens L J Add 1400 EO 6 39 3 4 G D m Z Z N AJ C T GJ AJ c6 92 E 838005 3100 713004 J100 8A3H 09908 5 HAMOd NOT LdIS2S30 0 C 20 m e Id8 0041 C GALL IEN KRUEGER PRODUCTION CHANGE ORDER PCO LEE Te 1 DATE 2 f1 ASSEMBLY 3oz ooSo 302 00b0 MODEL BB RB ASSEMBLY DESCRIPTION 400 RB Mam Assemblu PAGE Ju OF LL AFFECTS OPTIO
14. lanced It can be used with a direct box or can be connected directly to the high Z input of a mixer SPEAKERS Two speaker jacks are provided on the rear panel and will accept SPEAKERS CONT a total load of 4 ohms Lower impedances should not be used This unit can drive one four ohm speaker or two eight ohm speakers maximum Higher impedances such as eight or sixteen ohms are accep table No damage will result from operating the amplifier with the Speaker disconnected POWER SWITCH The power switch and associated pilot light are located in the lower right hand corner of the front panel FUSE Located on the rear panel never operate this amplifier with any other than the recommended fuse 120V operation replace with type 3AG4A 240V operation replace with type 3AG2A MAINTENANCE Your new amplifier is rugged It was built to give you a life time of trouble free operation if it is operated in accordance with the instructions above The only maintenance required is cleaning We recommend a soft damp cloth and mild soap for cleaning the outside surfaces If you are going to pack your amplifier around a lot we recommend a road case to protect it from scratches and road wear SETTING UP YOUR SOUND Your amplifier is designed to sound about right with the tone controls set flat 5 We therefore recommend you start with the EQ set flat and the voicing filters out Helpful Hints 1 Don t be afraid to experiment with
15. ork of Material DESCRIPTION OF CHANGE 1 karot Cho 83570 22 Comp Control Form 2 ae ROT zzont amp 3 C68 335 0 Assembly Drawing V Manat RO Mor Zk 0 2 ZB SAB qr 5 6 f RIS 1 Chande RT 2 4 220 Procedure _ Fab Drawing Silkscreen Punch Progr Continued on ECO supplement page Punch Program TOTAL PARTS ADDED TOTAL PARTS DELETED PART DESCRIPTION QTY REF DES PART DESCRIPTION REF DES DISTRIBUTION jEngineering a FORME REV A 42 7 93 Page of E GALLIEN TECHNOLOGY 408 441 8081 2240 Paragon Dr San Jose CA 95131 Fax 408 441 8085 B c 4 ENGINEERING CHANGE ORDER SSIGMER J lan Ka LEVEL 7 4 4 AC DESC 4oogB urna Ate Board ORIGINATOR IMQSA no ASSY 15 pod1 D Nad REV DIE _ EFFECTIVE _ PENDING APPROVAL X Next production Run Pending Reject Reason Engineering 770 4 4 DZIA in Process Material 6 Marketing Cost accounting AFFECTED AREA Improvement L Others REASON FOR CHANGE Z bushing neue _ Schematic Artwork EX IBill of Material Continued on ECO supplement page DESCRIPTION OF CHANGE _ NAL p chama FE Fimm
16. peakers Max 8 ohm 4 ohm Power 8 ohm 4 ohm Boost Preset Shipping Weight Dimensions Boost and cut at 4khz will add or remove edge and definition Boost and cut at lkhz There is a lot of sound in this band it works on the lower harmonics of your instrument and affects the punch of your sound Boost and cut at 250hz Basically this band affects the body of your sound Boost and cut at 60hz Affects only the bottom end and will be used to account for varying room accoustics 2mv rms 1V rms 1M ohm 6mv rms 3V rms 1M ohm 1 5V rms boost off 100k ohm min 1 5V rms boost off 40k ohm 500mv rms 600 ohm 2 max 1 max 125w 200w Switch to Ground 14 lbs 35 height 17 width x 9 depth 400RB 200W Bass Amp Turn on Procedure Board s 206 0047 C preamp 206 0041 A power amp Model 400RB all options 8 19 91 Setup Variac on zero power switch off connect power cord Connect either output to load box load A Resistance loads open switch in center Speaker on Load box to scope B and AC VM Set scope switch on load box to look at load A down Set oscillator on 200Hz sine wave 5mVrms 46 dB V DVM on 20 mV DC range AC Voltmeter on 30V range Scope B on 10V cm Scope sweep on 1ms cm scope trigger on B on RB Front panel set Tones master and boost to 10 switches out Volume on 0 Power Supply and Power Amp Test 1 2 3 4 6 D 8 9 10 11
17. sure less than 400mV Engage low cut contour and hi boost Noise 400 mVrms Volume to 0 Noise 100mVrms Boost to 0 Noise 10 mVrms Return knobs to zero switches out ready for burn in 400RB WAVEFORMS 200 HZ square wave BV 5mVrms input All knobs to 12 00 switches out Look at output with scope sef on Ims div and 5V div l Tones Center Filters Off Bass to TU Fig 3 Treble to 0 5 Hi Mid to 0 Fig 6 Lo Mid to 10 12 R13 UNLESS OTHERWISE SPECIFIED TEST CONDITIONS 200HZ SIN AT INPUT 1 a r 2 DSG 8 8 VEL BE ALL TONE AND VOL ON 10 BOOST ON 10 ALL FILTERS OUT DENOTES RMS VOLTAGE 2 V DESCRIPTION NEW 400RB PREAMP 406 0047 1 1 3 pa 5 amp L 1 40 1 94 H393NYN NII 71799 3 0 2000 909 SU4 di 044009 4409 304 ALUG AGU is 1994 48 9391539 384 OIIUW3HOS dWyJUd 84008 MIN G6 S2 G 84008 18155 00 3501 5 NORNA Ohee NOILdIMOS3O 3140 1808 166 806 ASO 1ONHO3L NII TUS SKA 31039 _ 100 5431113 TU 01 NO 1S008 OT NO DA ONY SNOL TU IAGNI 19 NIS 28002 AWesSNOILIGNOD 1531 I 031312395 3SIMM3HIO 5531 1 5310 FE RER e SEN OG 1N4002 5 y 60V D 7 use EEE 104 1M 1 60 41V No LOAD SPEAKER 37 5 6K 4 OHMS J8 104
18. the EQ on your bass first Make sure that you have as close to the sound you want from your bass before adjusting the EQ on your amp 2 Set your playing level first You may want to push up your volume and boost levels while dropping back the master This will give a fatter sound but can add dis tortion Some players find this desirable you will have to be the judge For the cleanest possible sound operate the master on 10 max The boost control is footswitchable and can act as a pre set volume The L E D next to the boost control indicates that boost is on SETTING UP YOUR SOUND CONT 3 Once your basic levels are set work with the voicing filters control stage rumble at high volume The Lo Cut is a bass roll off and is used to Mid Cut puts notch at about 500hz giving a mellow round sound Hi Boost adds edge and definition 4 Having set your levels and filters you are ready to fine tune your tone This is an involved procedure requiring you to use your ears to tell you what is right We have broken the sound spectrum into four basic bands and provided active controls for each Adjustment procedures are repetitive and require patience TREBLE HIGH MID LOW MID BASS SPECIFICATIONS Normal Gain Sensitivity Max Level Impedance 1048 Gain Sensitivity Max Level Impedance Effects Send Level Load Impedance Effects Return Level Impedance Direct Level Impedance Min S
Download Pdf Manuals
Related Search