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Gallien-Krueger 400RB-III, Service Manual

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Gallien-Krueger 400RB-III Service Manual Download Page 4

2

400RB Series

                    

Table  Of Contents

                    

     Gallien-Krueger

       2240 Paragon Dr.
       San Jose, CA, 95131
        phone: 408-441-7970
        fax:    408-441-8085
       www.gallien-krueger.com

Introduction.....................................................................
Quick Start.......................................................................
Sound Tips.......................................................................
Safety Information..........................................................
Installation and Maintenance........................................
Front Panel Controls.....................................................
Rear Panel Controls......................................................
400RB Series Combos...................................................
Tech Talk.......................................................................
Specifications.................................................................
Notes..............................................................................

                                         *All Features and specifications are subject to change without notice

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                                         **This list is subject to change without notice.

Table of Contents

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Summary of Contents for 400RB-III

Page 1: ...Service Manual 400RB III Series ...

Page 2: ...ts Operating Instructions 3 Turn On Calibration Procedure 20 Schematics 21 Bill of Materials 22 Note As of 1 99 there are no Engineering Change Orders ECOs for this model New ECOs will be re leased as they are issued ...

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Page 4: ... com Introduction Quick Start Sound Tips Safety Information Installation and Maintenance Front Panel Controls Rear Panel Controls 400RB Series Combos Tech Talk Specifications Notes All Features and specifications are subject to change without notice This list is subject to change without notice Table of Contents 9 10 11 12 14 15 3 5 6 7 8 ...

Page 5: ...not a substitute for reading the rest of the manual Your amplifier should have come with the following items please check the contents of the box to ensure that you have everything Included with your 400RB Head 400RB 1 Rack mount ears with hardware 2 Power cord 1 Owner s manual 1 Warranty card 1 Safety instructions sheet 1 Included with your 400RB Combo 400RB 112 or 115 1 Power Cord 1 Owner s Manu...

Page 6: ...r other manufacturer s products as some of our competitors are proud of reciting Instead I believe new and old problems are best solved with new solutions Having taken our own path GK GK GK GK GK products enjoy a unique unmatched sound allowing the artist using them every opportunity to make an original statement Having supported my products for over thirty years I have learned from the story they...

Page 7: ...ld be turned all the way down to get a flat response Set the Volume and Master Volumes at 0 If you have a five string bass push the button marked String Bass in Next Using an instrument cable connect your bass to the Input jack and turn the power switch on and play If the clip LED flashes push the button marked 10db 10db 10db 10db 10db in This will prevent you from overdriving the preamp Now Set t...

Page 8: ...ring instru ment Sound Tips Boost Master Turning up the Boost control will add a little growl to your tone This is an unmistakable GK trade mark sound that you will grow to appreciate Raising the Boost while lowering the Master will add more growl while keeping the sound level the same Growl is actually a small amount of even order harmonic distortion that sounds great through a woofer For most pl...

Page 9: ...r variation and electrical start up noise affecting your sound Do Not Use Extension Cords To avoid safety hazards use only the power cord supplied with your unit If a replacement cord is used make certain that it is of consistent quality and gauge as the original We do not recommend using extension cords with this product As with all electrical devices do not run power cords under rugs or carpets ...

Page 10: ...m part of the enclosure are specially designed to remove this heat Placing other electronic equipment near these heat dissipation systems may possibly affect the long term reliability of both your amplifier and the other equipment Moving the Unit Before moving the unit be certain to disconnect any interconnection cords with other components and make sure that you disconnect the unit from the AC ou...

Page 11: ...Presence Adds edge and definition to higher frequencies ActiveEqualization 7 Treble Boost and cut at 7kHz 14dB shelving type Add or remove edge and definition 8 High Mid 8 High Mid 8 High Mid 8 High Mid 8 High Mid Boost and cut at 1 kHz 6dB 10dB Q Optimized band pass type Works on lower string harmonics and effects the punch of your sound 9 LowMid Boost and cut at 250Hz 6dB 10dB Q Optimized band p...

Page 12: ...r amp output for Full Range operation only They deliver 240 watts into 4 Ohms Lower impedances should not be used Each jack has a minimum of 8 Ohms each Higher impedances such as 8 Ohms 16 Ohms or No Load are acceptable No damage will result from operating the amplifier with the speakers disconnected Rear Panel Controls ...

Page 13: ...40W into 4 Ohms Maximum power is achieved by connecting one 8 Ohm extension cabinet such as the 210RBS 410RBS or 115RBS in addition to the combo s internal 8 Ohm speaker load To drive more than one extension cabinet the combo s internal speaker can be disconnected by unplugging the speaker cable connected to the combo s back panel Below is a detailed description of the maximum loads the combos can...

Page 14: ... Since most amplifiers have limited output current capacity they need current limiting circuits to protect against self destruction High power tran sients trigger these circuits which rob the amplifier of it s ability to control speaker cones This creates a mushy unresponsive feel to your sound The 400RB Series has an extremely high current capacity over fifty amps so it doesn t need current limit...

Page 15: ...w have a thorough understanding of how your new 400RB Series amplifier works and what advantages it can offer you in getting your sound We thank you for reading the Owner s Manual and wish you the best of times Please send us your comments via www gallien krueger com or email us at sales gallien com Tech Talk Voicing Filters Voicing filters are used to completely revoice the amplifier In the case ...

Page 16: ...z Hi Mid 6db 10dB 1kHz Treble 14db 7kHz Voicing Filters String Bass Button 11db 20Hz Contour 2db 50Hz 10db 500Hz 3db 7kHz P r e s e n c e 9 d b 1 0 k H z Noise 90db referenced to 240W A weighted Cooling Continuously Variable Speed fan Amplifier Protection Full short circuit thermal RF protection Stable into reactive and mismatched loads Five second muted warm up Specifications Dimensions HxWxD 3 1...

Page 17: ...he 10 dB switch OUT Turn the BOOST to zero Output should be 3 8Vrms 9 Turn the WOOFER MASTER to zero output should be 0 volts 10 Turn the main VOLUME back down to zero TONESANDFILTERSTEST 1 Set the VOICING FILTERS to zero all other controls to the center 12 o clock and all switches out 2 Disconnect the load from the amplifier output 3 Change the scope setting to 2V Div and 1ms time base 4 Set the ...

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Page 29: ...BOLT 4 40 3 8 PHP CAD 2 pwr switch 4 111 0101 0 BOLT 4 40 5 8 PHP CAD 4 sink chassis 1 111 4060 0 SCREW 4AB 3 8 FHP 82 B Z 2 xlr direct out 1 111 6001 0 NUT 4 40 KEP SMALL 1 gnd terminal 1 111 7011 0 WASHER 4 SPLIT 9 2 pwr sw 3 bd chassis 4 sink chassis 1 112 8060 0 TR BOLT 6 32 3 8 PHP B Z 2 handle 1 112 9060 0 TR BOLT 6 32 3 8 FHP B Z 10 top cover 1 113 3060 0 SCREW 8AB 3 8 PHP B O 2 pwr cord co...

Page 30: ...SA56 PNP 80V 500MA TO 92 3 Q1 5 8 2 012 0002 0 2SC4793 NPN 200V 1 5A 2 10R1A 3 Q15 17 18 2 012 0003 0 2SC5242 NPN 230V 15A 2 16C1A 3 Q20 21 22 2 012 1002 0 2SA1837 PNP 200V 1 5A 2 10R1A 3 Q16 19 26 2 012 1003 0 2SA1962 PNP 230V 15A 2 16C1A 3 Q23 24 25 2 020 0004 0 1N755A ZENER 7 5V 500MW DO 35 1 D7 2 020 0150 0 1N965B ZENER 15V 5 500MW DO 35 2 D6 10 2 020 1000 0 1N4148 RECT FAST 200MA 100V 4NS DO ...

Page 31: ... 5 1 R5 2 050 4701 0 RES CARBON FILM 470 OHM 1 8W 5 4 R25 34 39 47 2 050 4702 0 RES CARBON FILM 4 7K OHM 1 8W 5 1 R23 2 050 4703 0 RES CARBON FILM 47K OHM 1 8W 5 1 R3 2 050 6801 0 RES CARBON FILM 680 OHM 1 8W 5 1 R37 2 050 6802 0 RES CARBON FILM 6 8K OHM 1 8W 5 1 R18 2 051 0270 0 RES CARBON FILM 2 7 OHM 1 4W 5 2 R43 44 2 051 1001 0 RES CARBON FILM 100 OHM 1 4W 5 1 R49 2 051 1003 0 RES CARBON FILM ...

Page 32: ...3 0 2SC3502 F NPN 200V 100MA TO 126 1 Q14 1 010 1003 0 2SA1380 F PNP 200V 100MA TO 126 1 Q13 1 086 0000 0 FAN 24V DC 160MA 80X80MM HIGH SPEED 1 1 093 0506 0 HSG 1X2 LOCKING CRIMP 093 0909 1 For fan wires 1 093 0909 0 TERM CRIMP 1 22GA 093 0509 2 for 093 0508 0 1 095 0006 0 HEAT SHRINK 3 16 IN 3 Around fan cable 1 105 0001 0 INSULATOR TAPE 1 X7MIL ADHESIVE BACK 0 1 105 0005 0 INSULATOR 9MIL TO 126 ...

Page 33: ...CER AXIAL 561 10 50V X7R 1 C27 2 030 4100 0 CAP CER AXIAL 10 PF 10 100V 1 C40 2 030 4101 0 CAP CER AXIAL 101 5 100 V COG 2 C18 45 2 031 0106 1 CAP ELEC RAD 106 20 25V NP 7 C3 8 11 12 30 39 2 031 0107 0 CAP ELEC RAD 107 20 16V LOW LEAKAGE 1 C43 2 031 1336 0 CAP ELEC RAD 336 10 50 25V 1 C10 2 031 2106 0 CAP ELEC RAD 106 10 50 50V 4 C32 33 46 47 2 031 2227 0 CAP ELEC RAD 227 10 50 50V 2 C37 38 2 031 ...

Page 34: ... CARBON FILM 8 2K OHM 1 8W 5 1 R64 2 060 1002 0 RES METAL FILM 1 00K 1 8W 1 2 R75 76 2 060 1213 0 RES METAL FILM 12 1 K OHM 1 8W 1 2 R73 74 2 060 1274 0 RES METAL FILM 127K 1 8W 1 1 R37 2 070 1513 0 POT 50K 15A 7MM KNURL 1W 1 R61 volume pot 2 070 1514 0 POT 50KB 7MM KNURL 1W 6 R14 21 28 38 43 51 boost presence EQ s 2 070 1522 0 POT 2KB 7MM KNURL 1W 2 R6 56 master contour pots 2 090 0007 0 SWITCH 8...

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