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270241 Service Manual

1. 210242 Filler for Speaker Box Specify m AVIBSA AMPLIFIED SUBWOOFER SPEAKER BLOCK DIAGRAM Code Description 210217 Black Sealer specify mt Accessories ie Rats on a Erm pec 768209 cuca ov gy P 788218 CONTROLS amp 277334 Owner s Manual 120965 M4i M5e x24mm Threaded Pin INPUTS BOARD CROSSOVEH BOAHD UM o 120148 Screw M5x65mm for Handle CS X OVER VOLUME AV 12 4 Ohm 120147 Screw M4x8mm for Speakers n ae Ee 778112 Cables Assembly 727601 Inputs Panel Assembly AV 12 4 Ohm AV 158 4 Ohm 778144 Jack Speakon Cables Assembly 841208 Cables Assembly 141200 Speakon Socket NLAMP Neutrik 727605 Inputs Panel Assembly AV 15S 4 Ohm eae EX cere MUTNE 140193 Jack Mono Socket 778144 Jack Speakon Cables Assembly 768202 Crossover Filter Board Pcb 313063 AV 12 4 Ohm 141200 Speakon Socket NLAMP Neutrik 667692 Rear Panel AV 12 4 Ohm 140193 Jack Mono Socket 667702 Handle 768206 Crossover Filter Board Pcb 313064 AV 15S 4 Ohm i NEGATIVE 667700 Grid 667696 Rear Panel AV 15S 4 Ohm 657270 EWT TM Elliptical Horn 667703 Handle 727607 657267 Box 667701 Grid AMPLIFIER BOARD s7 229037 1 4ohm Horn Tweeter 657269 Box 227056 12 4ohm Woofer Speaker 347393 Threaded Clog to steady on the floor 210242 Filler for Speaker Box Specify m 227060 15 4ohm Woofer Speaker 15V 5V VCCI VCC2 VCC2 210217 Black Sealer specify mt 210242 Filler f
2. m x 15V V m TR2 m e C198 100N m a MJE c 550 o N D M a 100V T 15V o xus ad sn m EN N C18 47U 15V 2N o N 5550m o f 15V D1 4002 R1 47E 3 X 010 400292 8k2 Nn D7 4148 IN 2 N x o oe 5 T E N N o N T 0 N z 019 7V5 020 7V5 N DL1 VTLSC4 a4 m C26 4N7 RSS 47K x it o sL 2 o o in M a a V 5 in P S p x c N al R64 22K IC1 TLO72 EN o C C25 10 N a M 470E S m R59 T C28 100 R58 4K7 100 por R38 100K BIAS ADJ M zN 7 5 51 10E int 5 o o N w R16 470E A o IC TLO72 g 9 m al a a 100N R48 12K R48 4E7 e a a D26 FEBB 05 4148 R27 68K 5 220U R14 2K2 D R17 4K7 C13 47P D12 4002 C22 100N iu dem Sto ZONE BOAR 100V C24 47U 12K 4 2 R24 820E 25 4 470P R13 D8 4002 R36 390E C15 470 1 2 7815 100N 100N IN OUT GNO C30 220U 80v 31 9064 CROSSOVER BOARD 3U7 R2 1 5 PCB 313061 Part Code 229037 Impedance 40hm FT 4000Hz LP 0dB oct HP 12dB oct Part Code 227056 Impedance 40hm NOTE THE SERVICE SUPPORT IS MADE ONLY BY REPLACEMENT THE ENTIRE BOARD PCB 313063
3. 100K SUBSONIC amp EMPHASIS FILTER 24dB oct X c C3 100N C1 100N 5 100V 2 5 100V C10 IC1 TLO72 der lt IC2 TLO72 15V ON JB Ew XB R12 SK6 15V PCBH313058 TF RED POWER MAINS EU VER SWITCH YELLOW 230Vac 15 50Hz MAINS US VER 115Vac 7 15 SO 60Hz 2 KLIXON BLACK 2 WHITE BLUE YELLOW 2 CN1 9 COMP 7 15V 6 GND IN 4 RLY 15V 2 GND 1 15V Xd N x m R70 TR27 z z Bc deret 5 5 327 2 TR26 z T c TR25 BC u BOARDO 5 i 56 iii Wee m 560 N N x z N 1 m o E m M N c N ni NI 22 15V 15V CN2 15 1 ON OFF R72 47K D 4002 2 159 SAHAN TR14 5 D2 4002 otl BC 2 560 t vaca TI rave 21 wv c gt TIS D o 550 CN2 1 1 F4 3 C gt 3 T2 5A R 94 Ne N CN1 2 S 3 ov oo gt Cue DS KBLO2 RON Avez KBPC25 N 2 1 o lm 8 SIGN R39 47K s R74 S6K2 D14 4148 R82 10K R85 15K R78 10K R83 D24 4148 NV R798 S6K2 t 15V c 560 IC2 LM393 N N w o T 4148 T 2 amp
4. 51 10E Sw R48 12K R49 4E7 018 4002 017 4002 016 4002 015 4002 029 4002 C27 220 R54 470 026 CS 2200 R14 2K2 D D12 4002 C22 100N 100V C24 47U 12K L C4 470P R13 R36 390E 100N 100N R70 10K TR27 BC 327 N N 150K 100N C35 100N C37 TR26 TR25 o BC o w BC S60 n M M 560 al N uU N x z N 1 M o o v E m M N c N N 22 15V 15V 15 R72 47K M o TR14 f oth BC 560 TRIG M gt BC D i 550 31 9064 Part Code 227050 Impedance 40hm DRW G BOCCATO DWGtt 550640 313059 313060 313061 319064 GENERALMUSIC S p A CKD G RICCI DATE 30 09 99 DESCRIPTION ALL RIGHTS ARE RESERVED NO COPIES OR REPRODUCE THIS DOCUMENT WITHOUT APP C ZUCCATTI REVH A AV1 55A WRITTEN CONSENT BY GENERALMUSIC Code 277334 130274 130276 737103 737104 778146 768211 340079 340078 140081 140069 110119 100060 100049 080605 080156 030560 030526 020250 768207 141189 141186 140929 120857 110267 100061 080743 080742 080293 074570 070245 042706 042630 042625 020250 727606 768214 141102 140929 110316 100904 100061 090917 090916 090201 090200 090194 090183 090153 080901 080245 080171 080156 080103 070105 060591 060051 04
5. 43 RS BSA LGA LOUDSPEAKER SYSTEMS active passive 3 CS C2 IN laBP TAQ NUE 356 Rig 4E7 EN R7 1 R25 4E z C Eq T index Technical Specifications 1 12 4 AVI2 8 AV15 4 AV15 8 AVIS Passive Versions Schematic Diagrams 1 12 4 AVI2 8 AV15 4 AV15 8 AVI5S Passive Versions Spare Part List AVI2A AVISA AVISSA Block Diagrams AV12A Test Procedures amp Adjustment AV15A Test Procedures amp Adjustment AV15SA Test Procedures amp Adjustment AV12A Schematic Diagram AV15A Schematic Diagram AVISSA Schematic Diagram AVI2A AVISA AVISSA Active Version Spare Part List Warnings Notice Service must be carried out by qualified personnel only Any tampering carried out by unqualified personnel during the guarantee period will forfeit the right to guarantee For a correct operation of the instrument after having switched off be careful to wait at least 3 seconds before switching on again To improve the device s specifications the schematic diagrams may be subject to change without prior notice All components marked by this symbol have special safety characteristics when replacing any of these components use only manufacturer s specified parts The u micro symbol of capacitance value is substituted by U The Q omega symbol of resistance value is substituted by E The electrolytic capacitors are 25Vdc rated v
6. R74 S6K2 014 4148 R82 10K R85 15K R78 10K R83 D24 4148 V R798 55kKk2 t 15V T l 560 IC2 LM393 N N o D30 4148 c 5 x 15V V mu RIT g a o xn 3 c z TRE AO MI 15V 2N o N s5500 o 15V 3 2 x D7 4148 lt m o c E a N 019 7V5 020 7V5 DL1 VTL5SC4 R34 1KS C26 4N7 RSS 47K 2 o 4 M lt 7 m N x RB4 22K IC1 TLO72 o T 25 1 470E duds o BIAS ADJ C28 10U R58 4K7 100 por R38 100K wa 5 R16 470E IC TLO72 lt N a a 100N u tr OS 4148 R27 68K R17 4K7 C13 47P V2 Er S404 SOA ANE G dope PERSE BOAR 4 2 R24 820E 25 C15 470 08 4002 m R2 180E 122 7815 IN GN iW OUT D 15V 15V D6 15V 07 1 04 CN2 15V 1 ON OFF 2 15V 3 15V 01 4002 D2 4002 e puer T4A KBPC2S 31 3061 R33 390E R50 OEO Ld 5 E TR2 C198 100N n a 100V N N EN N C18 47U 01 4002 Ri 47E D10 4002R2 8K2 Nu L1 C8 220U IE R28 8K2 R44 470E D28 4002 FE6B Sw 022 021
7. XER 7V5 1W 5 Zener Diode mes FE6B 6A 100V Fast Recovery Diode xis 1N4002 1A 100V Rectifier Diode ERA 1N4148 100mA 75V Signal Diode FAK 470E 20 Vertical Linear Trimmer SEN 8K2 2W 10 Resistor in OE22 5W 5 Wire Resistor ad 56K2 1 4W 1 Metalized Film Resistor 49K9 1 4W 1 Metalized Film Resistor St 10KO 1 4W 196 Metalized Film Resistor 030715 340783 340154 340079 340078 090924 090923 090920 090919 090918 090863 090862 080821 667698 237068 237069 210215 210212 110614 110291 110029 110018 110037 110036 080607 020491 778112 768204 667703 667701 659027 657272 657270 229036 227058 210242 210217 210215 210211 120965 120148 120147 737107 737108 778147 768213 340079 340078 100060 100049 080606 080293 080156 060403 030884 030555 768210 140929 140908 140873 110305 100919 100084 100061 100019 080743 080742 080103 075820 074570 070241 042717 042625 042617 042605 042565 042555 768209 141189 141186 140935 kk kk kk kk Box Assembly 1000u 6v3 20 Vert Electrolytic Capacitor TO264 Mica Washer TOS TO218 Mica Washer TO220 Mica Washer TO220 Insulated Bush MJL21194 TO264 Npn Transistor MJL21193 TO264 Pnp Transistor 802 TO126 Npn Darl Transistor MJE15031 TO220 Pnp Transistor MJE15030 TO220 Npn Transistor TIP36C TO218 Pnp Transistor TIP35C TO218 Npn Transistor Ptc 90 PTH59FO4BE2
8. D R17 4K7 C13 47P 900 012 4002 C22 100N UN a 2 2 R24 820E L R25 68E L x a A S 100V M 4 C24 47U 20 3 S NE n HO o 100N 100N J N N R69 4K7 n x lt t R70 10KE TR27 z z Z BC 327 o T TR26 x TR25 o BC BC M 560 M 560 N N x z N M o 1 m o bos I N c m N M N 22 145V 15V 15v R72 47K I TR14 BC 560 C10 4700U 4700U PCBH319064 CROSSOVER BOARD C4 7US R2 2E7 PCB 313061 Part Code 229036 Impedance 80hm FT 2600Hz LP 12dB oct HP 18dB oct Part Code 227058 Impedance 40hm NOTE THE SERVICE SUPPORT IS MADE ONLY BY REPLACEMENT THE ENTIRE BOARD KD G RICCI DATE 30 09 99 DESCRIPTION ALL RIGHTS ARE RESERVED NO COPIES OR REPRODUCE THIS DOCUMENT WITHOUT APP 20 REV A 31 3062 AV1SA WRITTEN CONSENT BY GENERALMUSIC ON DL 1 SIGNAL COMP 00 VOLUME LEFT INPUT LINK RIGHT INPUT LINK RIGHT OUT LEFT OUT LEGATO CROSSOVER BOARD VR2 SKB R32 4K22 IC3 TLO72 C20 22P 1 R23 10KO R15 15k0 R14 15k0 n R31 10KO C12 47U R22 10KO I R11 15KO 1 IC4 TLO74 N MG IC4 TLO74
9. 090200 2N5550 TO92 Npn Transistor 090194 BC560 TO92 LN Pnp Transistor 090183 BC550 TO92 LN Npn Transistor 090153 BC327 92 Pnp Transistor 080901 VTL5C4 Analog Optoisolator 080245 7M 5 1W 5 Zener Diode 080171 FE6B 6A 100V Fast Recovery Diode 080156 1N4002 1A 100V Rectifier Diode 080103 1N4148 100mA 75V Signal Diode 070105 470E 20 Vertical Linear Trimmer 060591 8K2 2W 10 Resistor 060051 0 22 5W 5 Wire Resistor 042695 56K2 1 4W 196 Metalized Film Resistor 042687 49K9 1 4W 196 Metalized Film Resistor 042605 10KO 1 4W 196 Metalized Film Resistor 030715 1000u 6v3 20 Vert Electrolytic Capacitor 340783 TO264 Mica Washer 340154 TOS TO218 Mica Washer 340079 TO220 Mica Washer 340078 TO220 Insulated Bush 090924 MJL21194 TO264 Npn Transistor 090923 MJL21193 TO264 Pnp Transistor 090920 MJE802 TO126 Npn Darl Transistor 090919 MJE15031 TO220 Pnp Transistor 090918 MJE15030 TO220 Npn Transistor 090863 TIP36C TO218 Pnp Transistor 090862 TIP35C TO218 Npn Transistor 080821 Ptc 90 PTH59FO4BE222TS 667699 Rear Panel 237068 Transformer 230Vac 350W EU 237069 Transformer 115Vac 350W US 210215 Adhesive Rubber Foam 10x1 9mm Specify mt 210212 Slider Switch Adhesive Gasket 110614 Mains Socket 110291 Power Switch 110029 T4A Fuse 5x20mm EU 110018 T6 3A Fuse 5x20mm EU 110037 T6 3A Fuse 6 3x32mm US 110036 T4A F
10. and set its sensitivity at 5V div oet the LEVEL potentiometer full clockwise The load resistor is disconnected INITIAL TEST Increase slowly the Variac The channel output signals must be symmetrical respect the GND without visible distortion and oscillation as shown in Fig 1 Trace A Trace B shown the amplifier 2nd stage input If there is a distortion read the section ADVICES HIGH RAIL CHECK Connect the CH2 probe tip to D25 cathode and set its sensitivity at 20V div When the output signal Positive half wave is less than 22Vp the voltage on D25 cathode must remain constant at 28V when the output signal exceeds 22Vp the voltage must follow the output signal with 6V offset see Fig 2 Trace B to check the negative high rail connect the probe to D26 anode see Fig 2 Trace C Connect the 40 500W load on the output and repeat the INITIAL and HIGH RAIL checks GAIN ADJUSTMENT oet the generator level at 10dB 0 245Vams adjust the trimmer VR2 on INPUTS board to obtain an output level of 14 5Vp 10Vawms Re set the generator level at OdB 0 775Vnug SIGN COMP SENSOR CHECK Set the LEVEL pot to minimum set the scope timebase at 1V div 1mS div then increase the level and checkthe SIGNAL COMP led activity it mustturn on green light when the amplifier output is higher than 1Vp Set the scope at 20V div and increase the level check the led it must change from green to red colour when the amplifier output signal is 36 2V
11. balanced 15 unbalanced Froms0 to 320 12db oct lt 2 THD4Noise Volurre Shield on off frequency AV 15SA SIGNAL LIMIT LED ONLED COMBO XLR M input XLR M output COMBO XLR M input link See label on the apparatus aB SYSTEM SPECIFICATIONS aB aB HE 100 NOTE Measured with the arti dipping circuit off Transistor Packages TO92 TO126 BC550 BC560 MJE340 MJE350 1 Collector MJE802 2 Base 1 Emitter 3 Emitter 2 Collector 2N5401 2N5550 3 Base 1 Emitter 2 Base 4 Collector 3 Collector 02 220 218 MJE15030 MJE15031 TIP35C TIP36C 1 Base MJE4342 MJE4352 2 Collector 1 Base 3 Emitter 2 Collector 4 Collector 3 Emitter 4 Collector 4 70264 MJL21 193 MJL21 194 1 Base 2 Collector 3 Emitter 4 Collector AV12 4 SPECIFICATION XOVER FREQ 4000Hz SLOPE LP OdB oct SLOPE HP 12dB oct POWER max 200W 4ohm nominal SPECIFICATION XOVER FREQ SLOPE HP 12dB oct POWER max 200W 8ohm nominal SPECIFICATION XOVER FREQ 2600Hz SLOPE LP 12dB oct SLOPE HP 18dB oct POWER max 350W nominal AV15 6 SPECIFICATION XOVER FREQ 2600Hz SLOPE LP 6dB oct SLOPE HP 12dB oct POWER max 350W 8ohm nominal 23 POWER max 350W 4ohm nominal L INK POWER IN POWER IN L INK POWER IN POW
12. no level changes must be detectable respect 1kHz OFFSET SENSOR CHECK oet the Variac to zero voltage output disconnect resistive load from the amplifier output connect temporarily by means of a suitable conductor wire CN2 pin 3 15Vdc to R72 side RL1 the protection circuitry TR14 15 16 detect the DC voltage and open the output relay RL1 within 3 seconds approx Remove the connection wait until the relay switch on and after some seconds repeatthe check with 15Vdc available on CN2 pin 2 the protection circuitry must open the relay again 2 SIGNAL TO NOISE RATIO CHECK Disconnect the audio generator and short the input pin 1 2 3 of XLR socket shorted the output signal noise must be less than 1mV AV15SA Amplified Subwoofer The following adjustment and notes are relative to this model only TECHNICAL SPECIFICATIONS Dimensions WxHxD 500x706x490mm Weight 24 5Kg Power Requirements 230Vac 10 50Hz 370VA 115Vac 10 50 60Hz 370VA Output Power 40 350W Max Undistorted Out 40 105Vpp Sensitivity 1W 1m 97 Max SPL continuous 122dBsp peak 125dBsas Frequency Response filter amplifier speaker 50Hz 320Hz only amplifier 3dB 10Hz 60KHz Input Sensitivity OdB 0 775 Input Impedance balanced 30KQ unbalanced 15KQ Voltage Gain 150Hz 33 1dB IMD SMPTE 60Hz 7KHz 4 1 0 196 THD THD N lt 0 1 S N Ratio unweighted gt 100dB Setup gt Connect
13. the Variac between the mains and the amplifier and set it at zero voltage 2 Turn full clockwise the LEVEL and X OVER potentiometers gt Connect the audio generator to the channel input and set it to 150Hz 7 75mVnys OdB sinusoidal signal gt Place the temperature sensor between heatsink and the PTC R59 gt The procedures that follow must be executed subsequently in the order specified 06 Supply Check 2 Remove the transformer secondary fuses located on SUPPLY board set the Variac to the nominal mains voltage check with the Multimeter the AC supply voltages 1 2 102 2 F3 F4 60 1 5Vac gt Re setthe Variac at zero voltage turn off the amplifier and put the fuses back on its holders gt Connect the oscilloscope probe CH1 to the channel output before RL1 set it to 20V div 1mS div 2 Setup the Variac slowly monitoring the Outputs with the oscilloscope CH1 connected it should display the sinusoidal input signal amplified with no distortions if a distortion occur check the AMPLIFIER board as suggested in the ADVICES section gt Ifthe protection trips turn off the amplifier wait some minutes and disconnect the supplies from the amplifier module CN2 CN3 on AMPLIFIER board continue to check the supplies 2 Finally verify the DC supplies on SUPPLY board CN2 pin 5 Vcc2 71 2Vdc CNS pin 1 Vcc1 42 1 5Vdc CN3 pin 5 6 Vcc1 42 1 5Vdc CN3 pin 4 Vcc2 71 2Vdc CN2 pi
14. 10035 080607 020491 778112 768202 667702 667700 659027 657271 657270 229037 227056 210242 210217 210215 210211 120964 120148 120147 737105 737106 778146 768212 340079 340078 140081 140069 110119 100060 100049 080606 080293 080156 060403 030560 030555 768208 141189 141186 140929 120857 110267 100061 080743 080742 080293 074570 070245 042715 042630 042625 727607 768215 141102 140929 110316 100904 100061 090917 090916 090201 090200 090194 090183 090153 080901 080245 080171 080156 080103 070105 060591 060051 042695 042687 042605 Mains Socket Power Switch T4A Fuse 5x20mm EU 2 5 Fuse 5x20mm EU 4 Fuse 6 3x32mm US T2 5A Fuse 6 3x32mm US KBPC25 25A 200V Rectifier Diode Bridge 100nF 1096 250Vac Polyester Capacitor Box Assembly Cables Assembly Crossover Filter Board Pcb 313063 AV 12 4 Ohm Handle Grid White Pot Knob Box EWT TM Elliptical Horn 1 4ohm Horn Tweeter 12 4ohm Woofer Speaker Filler for Speaker Box Specify m Black Sealer specify mt Adhesive Rubber Foam 10x1 9mm Specify mt Gasket between Tweeter and Horn M4i 5 x17 5mm Threaded Pin Screw M5x65mm for Handle Screw M4x8mm for Speakers AV 15A Amplifier Assembly 350W Amplifier Module EU 350W Amplifier Module US Amplifier Cables Assembly 350W Supply Board Pcb 313061 St TO220 Mica Washer ud TO220 Insulated Bush Pe H 2c P 10
15. 22TS Rear Panel Transformer 230Vac 350W EU Transformer 115Vac 350W US Adhesive Rubber Foam 10x1 9mm Specify mt Slider Switch Adhesive Gasket Mains Socket Power Switch T4A Fuse 5x20mm EU T6 3A Fuse 5x20mm EU T6 3A Fuse 6 3x32mm US T4A Fuse 6 3x32mm US KBPC25 25A 200V Rectifier Diode Bridge 100nF 1096 250Vac Polyester Capacitor Cables Assembly Crossover Filter Board Pcb 313062 AV 15 4 Ohm Handle Grid White Pot Knob Box EWT TM Elliptical Horn 1 80hm Horn Compression Driver 15 4ohm Woofer Speaker Filler for Speaker Box Specify m Black Sealer specify mt Adhesive Rubber Foam 10x1 9mm Specify mt Gasket between Tweeter and Horn M4i M5e x24mm Threaded Pin Screw M5x65mm for Handle Screw M4x8mm for Speakers AV 15SA Amplifier Assembly 350W Amplifier Module EU 350W Amplifier Module US kk kk kk kk kk kk kk kk kk Amplifier Cables Assembly 350W Supply Board Pcb 313061 TO220 Mica Washer TO220 Insulated Bush 7815 15V 1A Voltage Regulator 7915 15V 1A Voltage Regulator GBU8D 8A Rectifier Diodes Bridge 15V 1W 5 Zener Diode 1N4002 1A 100V Rectifier Diode 180E 3W 10 Resistor 10000U 80V 20 Snap In Electrolytic Capacitor 4700u 50V 20 Snap In Electrolytic Capacitor Con
16. 2695 042685 042605 030715 340154 340079 340078 090920 090919 090918 090913 090912 090863 090862 080821 667697 237077 237078 210215 210212 010 Spare Part List ACTIVE VERSIONS Description Accessories Owner s Manual Mains Cable EU Mains Cable US AV 12A Amplifier Assembly 200W Amplifier Module EU 200W Amplifier Module US Amplifier Cables Assembly 200W Supply Board Pcb 313061 m TO220 Mica Washer NE TO220 Insulated Bush ici 2c P 10 Terminal Block T P 10mm Terminal Block Fuse Clip 10 max EU US a 7815 15V 1A Voltage Regulator 2 7915 15V 1A Voltage Regulator add KBLO2 4A 200V Rectifier Diode Bridge ah 1N4002 1A 100V Rectifier Diode xx 4700u 80v 20 Snap In Electrolytic Capacitor 2200u 35v 20 Snap In Electrolytic Capacitor ion 10n 400V 10 Polyester Capacitor Inputs Board Pcb 313058 ssi Hor Female XLR Jack Socket NCJ6FK H Neutrik bie Hor Male XLR Socket NC3MAH Neutrik in 9 Contacts Vert Male Connector Vertical Male Faston 6 3mm ix 1sw 2pos Horizontal Slider Switch em TLO72 Dual J Fet Operational Amplifier ME 3mm Wide Diffused Green Led Led 3mm Wide Diffused Red Grn a 15V 1W 5 Zener Diode s 5K 31steps Linear Potentiometer id 100K 20 Vertical Linear Trimmer 80K6 1 4W 1 Metalized Film Resistor x 17K4 1 4W 196 Metalized Film Resistor a 15KO 1 4W 1 Metalized Film Resistor a 10n 400V 10 MKT Polyester Capacitor 200W Amplifie
17. 5x65mm for Handle 15 VCC VCE2 VCC2 768244 120147 Screw M4x8mm for Speakers AVISA AMPLIFIED LOUDSPEAKER um AV 15 4 Ohm MEE MEN SUPPLY REGULATORS amp amp CAPACITORS CAPACITORS 778112 Cables Assembly MAINS POWER 727603 Inputs Panel Assembly AV 15 4 Ohm 778144 Jack Speakon Cables Assembly TRANSFORMER 141200 Speakon Socket NLAMP Neutrik 768212 SUPPLY BOARD 140193 Jack Mono Socket 768204 Crossover Filter Board Pcb 313062 AV 15 4 Ohm 667694 Rear Panel AV 15 4 Ohm 667703 Handle POWER ON 667701 Grid AM 657270 EWT TM Elliptical Horn SIGNACOMP mu 657268 Box POSITIVE AMPL IF IER COMPRESSOR 229036 1 80hm Horn Compression Driver 227058 15 4ohm Woofer Speaker 210242 Filler for Speaker Box Specify m 210217 Black Sealer specify mt gt WW 758 210215 Adhesive Rubber Foam 10x1 9mm Specify mt POS 210211 Gasket between Tweeter and Horn 120965 M4i 5 x24mm Threaded Pin 120148 Screw M5x65mm for Handle NEGATIVE AMPL IF IER 120147 Screw M4x8mm for Speakers Note 768207 7276068 E INPUTS BOARD AV 15 8 Ohm Each spare part is single quantity unless otherwise specified AMPLIFIER BOARD VCCI VCC2 727604 Inputs Panel Assembly AV 15 4 Ohm Asterisk prefix explanation 778144 Jack Speakon Cable
18. BEES T R30 4K99 V I z 10KO C21 470 R25 10KO T 1 R18 15K0 1 ICS TLO74 22P 15 C31 R17 X 10KO R27 TIN eS 15V 07 1SV 08 04 CN2 400 SHIELD 51 CN1 4 Hy S305 HPDUTR 1 2 pe 330E HPOUTL 4 57 fel 4 PCB 313059 ICS TLO74 V N VA C22 22P R36 10KO R16 15 R28 15K0 a L L R26 10KO R37 4K99 SHIELD CHASSIS GROUND o Y o Tx 100N C23 100N 2 5 100V 2 5 100V IC3 TLO72 R12 88K7 C28 15N 3 VA X OVER IC4 TLO74 C33 1SN ICS TLO74 MAINS EU VER 230Vac 15 MAINS US VER 115Vac 7 15 RB 10KO 7 1 C5 47U RL1 4 6 3 VA R9 10KO 1 SOHz 50 50Hz IC2 MC33078 C4 47U Ic1 TLO71 N a R13 150E 1 oj z o o A 7 C14 47 a 6 5 B 16 R7 10KO xi 10K IC2 MC33078 KLIXON WHITE BLUE lt i CN1 HPOUTL 4 GND 3 E HPOUTR 1 17 47 R8 1 C13 47U g Aut F 11 5 O x vA VA o IC2 MC33078 31 5060 TF RED POWER SWITCH YELLOW 2 BLACK YELLOW 2 CN1 9 COMP 7 15V 6 GND IN 4 RLY 15V 2 GND 1 15V mico a A 1 VAC2 CN2 1 VAC1 CN2 2 VAC1 8 SIGN R39 47K
19. DRW G BOCCATO OWGt 550642 313058 313061 319064 313063 GENERALMUSIC S p A G RICCI DATE 30 09 99 DESCRIPTION ALL RIGHTS ARE RESERVED NO COPIES AVI2A OR REPRODUCE THIS DOCUMENT WITHOUT APP 20 WRITTEN CONSENT BY GENERALMUSIC SIGNAL COMP 08 VOLUME VR1 SKB DL2 R10 1K2 gt gt N m R11 10K R13 10E 400 1 15V 1 04 15V D1 VV SHIELD swi R8 R7 1SKO 1 O 7 7 22 15 R4 C13 22P R9 15KO0 1 2 TLO72 VR2 100K SUBSONIC 24dB oct amp EMPHASIS FILTER 17K4 x 100N C1 R1 C3 C12 470 RB 3K9 xi 100V 2 5 C10 IC1 TLO72 4 TLO72 IC2 TLO72 R3 82KS ON Jb ENPUES ES JA LJ R12 SK6 470 15V PCB 313058 1 RED Z30Vac 15 SWITC WE 230Vac 15 50Hz SWITCH YELLOW MAINS US VER 115Vac 15X 50 50Hz KLIXON BLACK 2 WHITE BLUE YELLOW 2 9 COMP 8 SIGN 15V 6 GND 5 IN 4 RLY 15V 2 GND 15V 15V 10U C17 R40 8K2 cops CN1 1 VAC2 CN2 1 VAC1 CN1 3 CN2 2 VAC T4A 10N C4 400 2 o 400 R39 47K D14 4148 R85 15K R41 1K R87 D3
20. ER IN POWER IN POWER OUT 159 202 CROSSOVER BUARU C R1 1ES NOTE THE SERVICE SUPPORT IS MADE ONLY BY REPLACEMENT THE ENTIRE BOARD PCBH313063 768205 ERUSSsUVER BUAR C Ri 1 5 NOTE THE SERVICE SUPPORT IS MA DE ONLY BY REPLACEMENT THE ENTIRE BOARD PCBH313063 R2 2E7 100V 10uF L 2mH R1 2E2 R1 15E NOTE THE SERVICE SUPPORT IS MADE ONLY BY REPLACEMENT THE ENTIRE BOARD NDTE THE SERVICE SUPPORT IS MADE ONLY BY REPLACEMENT THE ENTIRE BOARD 31 3065 56206 LRUSSUVeER L1 3 5mH NOTE THE SERVICE SUPPORT IS MADE ONLY BY REPLACEMENT THE ENTIRE BOARD 31 3064 DRW DWGit 550643 R MAGALOTTI DATE 30 09 99 DESCRIPTION APP C ZUCCATTI REV t A Avalon Passive Part Code 229037 Impedance 40hm Part Code 227056 Impedance 40 Part Code 229038 Impedance 80hm Part Code 227057 Impedance 80hm Part Code 229036 Impedance 80hm Part Code 227058 Impedance 40hm Part Code 229036 Impedance 80hm Part Code 227059 Impedance Part Code 227060 Impedance 40hm ALL RIGHTS ARE RESERVED NO COPIES OR REPRODUCE THIS DOCUMENT WITHOUT WRITTEN CONSENT BY GENERALMUSIC Spare Part List PASSIVE VERSIONS 1
21. O 4148 R86 47K 15V ul lt DL1 VTLSC4 VV R64 22K R59 C28 10U R58 4K7 100 7 5 IC TLO72 x all uw PAL OIF 550w AMPLIFIER BUARD R2 180E 1W 15V 15V D6 15V 07 1WD4 15V D1 4002 D2 4002 05 GBUSD x 550 1K R62 013 4148 KBPC2S IN GN 024 4148 019 7V5 1 023 4148 2 7815 R83 C26 4N7 Ici 25 R38 OUT D R74 S6K2 R82 10K R78 10K WR79 S6K2 560 IC2 LM393 N 5 a n 15V V m lt a TR2 m in C19 100N x N 5 MJE m N o a S 100V at ZN N TRE RO MI NO C18 470 2N Y N o 5550m o D1 4002 R1 C3 820P 47E 010 4002R2 8K2 E 4 47K R19 4K7 R26 68K C10 47P C8 220U 1 R28 8K2 TR18 MJE 340 R45 4 7 020 7VS 1 R55 47K R34 1K5 D28 4002 R44 470E R35 S60E FE6B TLO72 Sw 10P VR1 470E m BIAS ADJ 022 021 51 10E Sw R16 470E 100N R48 12K R49 4E7 018 4002 017 4002 016 4002 015 4002 029 4002 C27 220 R54 470 026 05 4148 27 CS 2200 R14 2K2
22. Terminal Block 79 3c 10 Terminal Block Fuse Clip 10 max EU US xi 7815 15V 1A Voltage Regulator et 7915 15V 1A Voltage Regulator iex GBU8D 8A Rectifier Diodes Bridge ai 15V 1W 5 Zener Diode Tt 1N4002 1A 100V Rectifier Diode aid 180E 3W 10 Resistor iid 4700u 80v 20 Snap In Electrolytic Capacitor XX 4700u 50V 20 Snap In Electrolytic Capacitor Inputs Board Pcb 313058 em Hor Female XLR Jack Socket NCJ6FK H Neutrik t Hor Male XLR Socket NC3MAH Neutrik ii 9 Contacts Vert Male Connector 6 Vertical Male Faston 6 3mm t 1sw 2pos Horizontal Slider Switch m TLO72 Dual J Fet Operational Amplifier add 3mm Wide Diffused Green Led A Led 3mm Wide Diffused Red Grn uid 15V 1W 5 Zener Diode ae 5K 31steps Linear Potentiometer S 100K 20 Vertical Linear Trimmer 2 82K5 1 4W 1 Metalized Film Resistor ii 17K4 1 4W 196 Metalized Film Resistor m 15KO 1 4W 1 Metalized Film Resistor 350W Amplifier Board Pcb 319064 i 350W Amplifier Board Pcb 319064 without Power Transistors iid 6 Contacts Vert Male Connector mes 9 Contacts Vert Male Connector SEE Relay 24V 1 Switch no 16A 250V AY LM393 Dual Comparator C TLO72 Dual J Fet Operational Amplifier KER MJE350 126 Pnp Transistor EER MJE340 126 Npn Transistor EN 2N5401 TO92 Pnp Transistor dad 2N5550 TO92 Npn Transistor gue BC560 TO92 LN Pnp Transistor SUE BC550 TO92 LN Npn Transistor BC327 TO92 Pnp Transistor NEN VTL5C4 Analog Optoisolator
23. e check with the Multimeter the AC supply voltages F1 F2 76 2Vac F3 F4 42 1 5Vac Re set the Variac at zero voltage turn off the amplifier and put the fuses back on its holders Connect the oscilloscope probe CH1 to the channel output before RL1 set it to 20V div 1mS div Set up the Variac slowly monitoring the Outputs with the oscilloscope CH1 connected it should display the sinusoidal input signal amplified with no distortions if a distortion occur check the AMPLIFIER board as suggested in the ADVICES section Ifthe protection trips turn offthe amplifier wait some minutes and disconnect the supplies from the amplifier module CN2 CN3 on AMPLIFIER board continue to check the supplies Finally verify the DC supplies on SUPPLY board CN2 pin 5 Vcc2 54 2Vdc pin 1 Vcc1 29 1 5Vdc CN3 pin 5 6 Vcc1 29 1 5Vdc CN3 pin 4 Vcc2 54 2Vdc CN2 pin 3 15 1Vdc CN2 pin 2 15 1Vdc If one or more voltages don t correspond check the rectifiers capacitors and transformers disconnecting them from circuitry refer to schematics Channels Check gt gt Verify with the Multimeter the insulation between the heatsink and the transistors collectors Verify with the Multimeter the PTC resistor value R59 it must be between 500 and 2000 SETUP Connect the CH1 scope GND clip to CN2 pin 6 SGND terminal Connect the CH1 probe tip to CN3 pin 2 or 3 PWR out Connect the CH2 probe tip to D20 anode
24. ere in the circuitry of the positive low rail If the positive cycle appears distorted you can assume that the problem is in the circuitry of the negative low rail 2 Ifthe high rails appear distorted or are not modulating as shown in figure then the problem probably exists somewhere in the circuitry of the respective 4 r defective high rail Refer to the schematics Figures Figure 1 and 2 show the right shape of the traces but not their real levels refer to the levels mentioned in the chapter of appropriate amplified loudspeaker Figure 3 and 4 show the frequency response of the AV15SA crossover Fg 1 F T1111 AHAH i N 3 Fig 2 HN Trace B TF Trace A Y Zi Trace C E X OVER at max 30 8 7 NS NS X OVER at min 26 8 15 4 Fig 4 LIH SU BEI We SCC CH 28 ik 18k 2Bk m E ATL E D L za oo HO won R10 1K2 LLI 2 D 3 in o gt gt 53 5 R8 15 4 R7 1SKO z 5 illo 1 DARUT ESIS gt gt X a N N V g 52 gt gt wn 2 ERE ys T sla wv 4 4 R11 10K VA R13 10E bieza SHIELD O O S1 400 5W1 C13 22 R9 15 IC2 TLO72 C12 470 RB 3K9 VR2
25. k the AMPLIFIER board as suggested in the ADVICES section gt gt If the protection trips turn off the amplifier wait some minutes and disconnect the supplies from the amplifier module CN2 CN3 on AMPLIFIER board continue to check the supplies Finally verify the DC supplies on SUPPLY board CN2 pin 5 4 Vcc2 71 2Vdc CNS pin 1 4 Vcc1 42 1 5Vdc pin 5 6 Vcc1 42 1 5Vdc pin 4 Vcc2 71 2Vdc CN2 pin 15 1Vdc CN2 pin 2 15 1Vdc If one or more voltages don t correspond check the rectifiers capacitors and transformers disconnecting them from circuitry refer to schematics Channels Check gt gt Verify with the Multimeter the insulation between the heatsink and the transistors collectors Verify with the Multimeter the PTC resistor value R59 it must be between 500 and 2000 SETUP Connect the CH1 scope GND clip to CN2 pin 6 SGND terminal Connect the CH1 probe tip to CN3 pin 2 or 3 PWR out Connect the CH2 probe tip to D20 anode and set its sensitivity at 5V div Set the LEVEL potentiometer full clockwise The load resistor is disconnected INITIAL TEST Increase slowly the Variac The channel output signals must be symmetrical respect the GND without visible distortion and oscillation as shown in Fig 7 Trace A Trace B shown the amplifier 2nd stage input If there is a distortion read the section ADVICES HIGH RAIL CHECK Connect the CH2 probe tip to D25 cath
26. n 15 1Vdc CN2 pin 2 15 1Vdc 2 Ifone or more voltages don t correspond check the rectifiers capacitors and transformers disconnecting them from circuitry refer to schematics Channels Check gt Verify with the Multimeter the insulation between the heatsink and the transistors collectors 2 Verify with the Multimeter the PTC resistor value R59 it must be between 50Q and 2002 gt SETUP Connect the CH1 scope GND clip to CN2 pin 6 SGND terminal Connect the CH1 probe tip to CN3 pin 2 or 3 PWR out Connect the CH2 probe tip to D20 anode and set its sensitivity at 5V div Set the LEVEL potentiometer full clockwise The load resistor is disconnected gt INITIAL TEST Increase slowly the Variac The channel output signals must be symmetrical respect the GND without visible distortion and oscillation as shown in Fig 1 Trace A Trace B shown the amplifier 2nd stage input If there is a distortion read the section ADVICES 2 HIGH RAIL CHECK Connect the CH2 probe tip to D25 cathode and set its sensitivity at 20V div When the output signal Positive half wave is less than 34Vp the voltage on D25 cathode must remain constant at 40V when the output signal exceeds 40Vp the voltage must follow the output signal with 6V offset see Fig 2 Trace B to check the negative high rail connectthe probe to D26 anode see Fig 2 Trace C gt Connect the 40 500W load on the output and repeat the INITIAL and HIGH RAIL check
27. ode and set its sensitivity at 20V div When the output signal Positive half wave is less than 34Vp the voltage on D25 cathode must remain constant at 40V when the output signal exceeds 40Vp the voltage must follow the output signal with 6V offset see Fig 2 Trace B to check the negative high rail connect the probe to D26 anode see Fig 2 Trace Connect the 4Q 500W load on the output and repeat the INITIAL and HIGH RAIL checks GAIN ADJUSTMENT Set the generator level at 10dB 0 245Vams adjust the trimmer VR2 on INPUTS board to obtain an output level of 19Vp 13 4 Re set the generator level at OdB 0 775Vnug SIGN COMP SENSOR CHECK Set the LEVEL pot to minimum set the scope timebase at 1V div 1mS div then increase the level and check the SIGNAL COMP led activity it mustturn on green light when the amplifier output is higher than 1Vp Set the scope at 20V div and increase the level check the led it must change from green to red colour when the amplifier output signal is 50 2Vp increasing the input level the output signal must keep the same level this is due to the limiter compression circuitry IC2 DL1 IC1 BIAS ADJUSTMENT With the load connected wait until the temperature reach 50 oet the generator level at zero connect the Multimeter across the resistors R60 then adjust VR1 trimmer to read 15x0 5mVdc gt BANDWIDTH CHECK Switch alternatively the generator frequency to 100Hz and 10kHz
28. oltage unless otherwise specified All resistors are 1 8Q unless otherwise specified All switches shown in the OFF position All DC voltages measured to ground with a voltmeter 20KOhm V a Logic supply ground lt Soldering point 4 Supply voltage e Male connector Test point Analog supply ground 2 Female connector lt Flag joined with one or more flags Chassis ground M F faston connector with the same signal name inscribed 2 Earth ground Zs ATTENTION Observe precautions when handling electrostatic sensitive devices Address GENERALMUSIC p A Sales Division 47842 S Giovanni in Marignano RN ITALY Via delle Rose 12 tel 0541 959511 fax 0541 957404 GENERALMUSIC on the NET http Www generalmusic com High Low W continuous W peak Ohms AVALON TECHNICAL SPECIFICATIONS AV 12 AV 15 AV 15S LOUDSPEAKER SPECIFICATIONS 1 tweeter with phasing 1 compression driver plug and EWT hom wth EWT hom 200 350 400 600 4 8 4 8 Hz 5 kHz 2 6 kHz 6 12 dB oct 6 12 dB oct 200 Hz 12 6 dB oct 12 dB oct 4 12 18 dB oct 4 way SPEAKON ACK input link High density polyetylene enclosure 4 polyetyenic foam Protection rretal grid 436x616x420 500x706x490 500x706x490 1kHz max THD 1 15 18 5 20 26 18 5 24 5 POTENZA D USCITA IHF Tone burst 10 20 ms Max THD 0 199 350 0 775V 30
29. or Speaker Box Specify m 210215 Adhesive Rubber Foam 10x1 9mm Specify mt 210217 Black Sealer specify mt EU LOW RAILS HIGH RAILS 210211 Gasket between Tweeter and Horn 210215 Adhesive Rubber Foam 10x1 9mm Specify mt MIT ING PEGULATORG i leapa mons 120964 M4i M5e x17 5mm Threaded Pin for Woofer 177721 Fixing Plate to fix the Floor Bracket UNES SWITCH 120148 Screw M5x65mm for Handle 120965 4 M5e x24mm Threaded Pin P RITE 120147 Screw M4x8mm for Speakers 120148 Screw M5x65mm for Handle 768213 SUPPLY BOARD 120147 Screw M4x8mm for Speakers AV 12 8 Ohm 667704 Floor Bracket with Threaded Knobs 778112 Cables Assembly 727602 Inputs Panel Assembly AV 12 8 OHM POWER ON 2 778144 Jack Speakon Cables Assembly 141200 Speakon Socket NLAMP Neutrik SIGN COMP 140193 Jack Mono Socket er POSITIVE 768203 Crossover Filter Board Pcb 313063 AV 12 8 Ohm COMPRESSOR pues 667693 Rear Panel AV 12 8 Ohm 667702 Handle 667700 INPUT MMC din 657270 EWT TM Elliptical Horn ITE 657267 229038 1 80hm Horn Tweeter 227057 12 80hm Woofer Speaker NEGATIVE 210242 Filler for Speaker Box Specify m AMPLIFIER 210217 Black Sealer specify mt 768208 72 607 210215 Adhesive Rubber Foam 10x1 9mm Specify mt INPUTS BOARD AMPLIFIER BOARD VOE2 210211 Gasket between Tweeter and Horn 120964 M4i M5e x17 5mm Threaded Pin 120148 Screw M
30. p increas ing the input level the output signal must keep the same level this is due to the limiter compression circuitry IC2 DL1 IC1 BIAS ADJUSTMENT With resistive load connected wait until the temperature reach 50 c oet the generator level at zero connect the Multimeter across the resistors R60 then adjust VR1 trimmer to read 13 0 5mVdc BANDWIDTH CHECK owitch alternatively the generator frequency to 100Hz and 10kHz no level changes must be detectable respect 1kHz OFFSET SENSOR CHECK oet the Variac to zero voltage output disconnect resistive load from the amplifier output connect temporarily means of a suitable conductor wire CN2 pin 3 15Vdc to R72 side RL1 the protection circuitry TR14 15 16 detect the DC voltage and open the output relay RL1 within 3 seconds approx Remove the connection wait until the relay switch on and after some seconds repeatthe check with 15Vdc available on CN2 pin 2 the protection circuitry must open the relay again SIGNAL TO NOISE RATIO CHECK Disconnect the audio generator and short the input 1 2 3 of XLR socket shorted the output signal noise must be less than 1mV AV15A Amplified Loudspeaker The following adjustment and notes are relative to this model only TECHNICAL SPECIFICATIONS Dimensions WxHxD 500x706x490mm Weight 26Kg Power Requirements 230Vac 10 50Hz 370VA 115Vac 10 50 60Hz 370VA Output Power 40 350W Max Undisto
31. r Board Pcb 319064 200W Amplifier Board Pcb 319064 without Power Transistors MA 6 Contacts Vert Male Connector A 9 Contacts Vert Male Connector uid Relay 24V 1 Switch no 16A 250V add LM393 Dual Comparator TEN TLO72 Dual J Fet Operational Amplifier Mk 50 TO126 Pnp Transistor mem MJE340 TO126 Npn Transistor MN 2N5401 TO92 Pnp Transistor TNT 2N5550 TO92 Npn Transistor MEX BC560 TO92 LN Pnp Transistor Ae BC550 TO92 LN Npn Transistor BC327 TO92 Pnp Transistor NEN VTL5C4 Analog Optoisolator or 7V5 1W 5 Zener Diode er FE6B 6A 100V Fast Recovery Diode iiti 1N4002 1A 100V Rectifier Diode 1N4148 100mA 75V Signal Diode Wem 470E 20 Vertical Linear Trimmer cid 8K2 2W 10 Resistor 22 5W 5 Wire Resistor CEN 56K2 1 4W 1 Metalized Film Resistor TUS 47K5 1 4W 196 Metalized Film Resistor iid 10KO 1 4W 196 Metalized Film Resistor us 1000u 6v3 20 Vert Electrolytic Capacitor 218 Mica Washer SE TO220 Mica Washer a TO220 Insulated Bush Ak MJE802 TO126 Npn Darl Transistor Sh MJE15031 TO220 Pnp Transistor a MJE15030 TO220 Npn Transistor a MJE4352 TO218 Pnp Transistor a MJE4342 TO218 Npn Transistor is TIP36C TO218 Pnp Transistor ae TIP35C TO218 Npn Transistor xx Ptc 90 PTH59F04BE222TS Rear Panel Transformer 230Vac 200W EU Transformer 115Vac 200W US Adhesive Rubber Foam 10x1 9mm Specify mt Slider Switch Adhesive Gasket 110614 110291 110029 110014 110036 1
32. rted Out 40 105Vpp Sensitivity 1W 1m 99dBspr Max SPL continuous 124 127 Frequency Response amplifier speaker 60Hz 20kHz only amplifier 3dB 10Hz 60kHz Input Sensitivity OdB 0 775Vnus Input Impedance balanced 30KQ unbalanced 15KQ Voltage Gain 33 1dB IMD SMPTE 60Hz 7KHz 4 1 0 196 THD THD N lt 0 1 S N Ratio unweighted gt 100dB Note measured with the limiter deactivated Setup gt Connect the Variac between the mains and the amplifier and set it at zero voltage Turn full clockwise the LEVEL potentiometer Connect the audio generator to the channel input and set it to 150Hz 7 75mVnuvs OdB sinusoidal signal Place the temperature sensor between heatsink and the PTC R59 The procedures that follow must be executed subsequently in the order specified Supply Check gt Remove the transformer secondary fuses located on SUPPLY board set the Variac to the nominal mains voltage check with the Multimeter the AC supply voltages F1 F2 102xz2Vac F3 F4 60 1 5Vac Re set the at zero voltage turn off the amplifier and put the fuses back on its holders Connect the oscilloscope probe CH1 to the channel output before RL1 set it to 20V div 1mS div Set up the Variac slowly monitoring the Outputs with the oscilloscope CH1 connected it should display the sinusoidal input signal amplified with no distortions if a distortion occur chec
33. s 2 GAIN ADJUSTMENT oet the generator level at 10dB 0 245Vays adjust the trimmer VR1 on CONTROLS amp CROSSOVER board to obtain an output level of 19Vp 13 4 Vnus 2 Re set the generator level at OdB 0 775Vnug 2 SIGN COMP SENSOR CHECK Set the LEVEL pot to minimum set the scope timebase at 1V div 1mS div then increase the level and check the SIGNAL COMP led activity it mustturn on green light when the amplifier output is higher than 1Vp Setthe scope at 20V div and increase the level checkthe led it must change from green to red colour when the amplifier output signal is 50 2Vp increas ing the input level the output signal must keep the same level this is due to the limiter compression circuitry IC2 DL1 IC1 2 BIAS ADJUSTMENT With the load connected wait until the temperature reach 50 c oet the generator level at zero connect the Multimeter across the resistors R60 then adjust VR1 trimmer to read 15x0 5mVdc gt BANDWIDTH CHECK The bandwidth of the amplifier board only is linear within the audio range 20Hz 20kHz but in this case is limited by the X OVER circuitry on CON TROLS amp CROSSOVER board Figure 3 and 4 show the LowPass and the HighPass response check the correspondance with it for some frequency values 50 100 150 300 for example 2 OFFSET SENSOR CHECK oet the Variac to zero voltage output disconnect resistive load from the amplifier output connect temporarily by means of a s
34. s Assembly Omitted First level spare part 141200 Speakon Socket NL4MP Neutrik One asterisk Second level part of previous listed first level part Ee ie elu eer 140193 Jack Mono Socket Two asterisk Third level part of previous listed second level part AVIZA AMPLIFIED LOUDSPEAKER BOARD 768205 Crossover Filter Board Pcb 313065 AV 15 8 Ohm Three asterisk Ei m LOW RAILS HIGH RAILS RECTIFIER RECTIFIER 667695 Rear Panel AV 15 8 Ohm Any request for not above mentioned part must encompass specific description including REGULATORS caes 667703 Handle 1 Model name Due 667701 Grid 2 Section name TRANSFORMER 657270 EWT TM Elliptical Horn 3 Module code 769211 SUPPLY BOARD 657268 Box 4 Reference name 229036 1 80hm Horn Compression Driver 5 Quantity number DRW G BOCCATO DWGH 550644 PCBt GENERALMUSIC 5 ITALY CKD G RICC DSKH 5 PART 1 1 SCHEMATIC DIAGRAM AVALON SERIES ACTIVE ALL RIGHTS ARE RESERVED COPIES BLOCK DIAGRAMS OR REPRODULE THIS DOCUMENT WITHOUT ARP 20 REV 08 10 38 WRITTEN CONSENT BY GENERALMUSIC 04 TEST PROCEDURES amp ADJUSTMENTS These procedures are relative to the ACTIVE versions amplified loudspeakers only Precaution gt To prevent short circuit during any test the oscilloscope must be EARTH insulated this occurs because some test require to connect its probe to the amplifier output non compliance may ca
35. st Instruments Vv v v v v v Audio Generator Dual Trace Oscilloscope Digital Multimeter Temperature Meter 49 500W 1000 10W resistors Variac 0 250Vac AV12A Amplified Loudspeaker The following adjustment and notes are relative to this model only TECHNICAL SPECIFICATIONS Dimensions WxHxD 436x616x420mm Weight 28 5Kg Power Requirements 230Vac 10 50Hz 210VA 115Vac 10 50 60Hz 210VA Output Power 40 200W Max Undistorted Out 40 80Vpp Sensitivity 1W 1m 9 Max SPL continuous 120dBspi peak 123dBsp Frequency Response _ amplifier speaker 70Hz 20kHz only amplifier 3dB 10Hz 60kHz Input Sensitivity OdB 0 775 Input Impedance balanced 30KQ unbalanced 15KQ Voltage Gain 31 1dB IMD SMPTE 60Hz 7KHz 4 1 0 196 THD THD N lt 0 1 S N Ratio unweighted gt 100dB Note measured with the limiter deactivated Setup gt gt gt gt gt Connect the Variac between the mains and the amplifier and set it at zero voltage Turn full clockwise the LEVEL potentiometer Connectthe audio generatorto the channel input and setitto 1kHz 775mVnus OdB sinusoidal signal Place the temperature sensor between heatsink and the PTC R59 The procedures that follow must be executed subsequently in the order specified Supply Check gt Hemove the transformer secondary fuses located on SUPPLY board set the Variac to the nominal mains voltag
36. trols amp Crossover Board Pcb 313060 9 Contacts Vert Male Connector 6 Contacts Vert Male Small Connector 4 Contacts Vert Male Connector Relay 12V 2 Switch 1A 250V MC33078 Dual LN Operational Amplifier TLO74 Quad J Fet Operational Amplifier TLO72 Dual J Fet Operational Amplifier TLO71 LN J Fet Operational Amplifier 3mm Wide Diffused Green Led Led 3mm Wide Diffused Red Grn 1N4148 100mA 75V Signal Diode 4x100K 16mm Hor Rotary Alog Potentiometer 5K 31steps Linear Potentiometer 100K 20 Horizontal Linear Trimmer 88K7 1 4W 1 Metalized Film Resistor 15KO 1 4W 1 Metalized Film Resistor 13 1 4W 1 Metalized Film Resistor 10KO 1 4W 1 Metalized Film Resistor 4K99 1 4W 1 Metalized Film Resistor 4K22 1 4W 1 Metalized Film Resistor Inputs Board Pcb 313059 Hor Female XLR Jack Socket NCJ6FK H Neutrik Hor Male XLR Socket NC3MAH Neutrik 6 Contacts Hor Male Connector 140872 4 Contatcs Hor Male Connector 110267 1sw 2pos Horizontal Slider Switch 080293 15V 1W 5 Zener Diode 727607 350W Amplifier Board Pcb 319064 768215 350W Amplifier Board Pcb 319064 without Power Transistors 141102 6 Contacts Vert Male Connector 140929 9 Contacts Vert Male Connector 110316 Relay 24V 1 Switch no 16A 250V 100904 LM393 Dual Comparator 100061 TLO72 Dual J Fet Operational Amplifier 090917 MJE350 TO126 Pnp Transistor 090916 MJE340 TO126 Npn Transistor 090201 2N5401 TO92 Pnp Transistor
37. uitable conductor wire CN2 pin 3 15Vdc to R72 side RL1 the protection circuitry TR14 15 16 detect the DC voltage and open the output relay RL1 within 3 seconds approx Remove the connection wait until the relay switch on and after some seconds repeatthe check with 15Vdc available on CN2 pin 2 the protection circuitry must open the relay again 2 SIGNAL TO NOISE RATIO CHECK Disconnect the audio generator and short the input pin 1 2 3 of XLR socket shorted the output signal noise must be less than 1mV Advices 2 Checkthe channels one attime to determine which is right note if you have a spare amplifier module that you know as right use it 2 Ifyou have determinate that the problem is a short on a rail you must check the output transistors to determine which transistor devices are bad Use asoldering iron to lift one leg of each emitter pin and measure the emitter collector resistance on each device Unsolder and lift one leg of each base pin and check the base collector resistance of each transistor and replace any that measure as a short If all the transistors are OK unsolder and lift one leg of each diode and check them Check the circuit board for open foil traces Use the Multimeter as Ohm meter to check the resistors particularly the base and emitter resistors of damaged transistor 2 Ifthe input sinewave appears to be distorted during the negative cycle you can assume that the problem is located somewh
38. use 6 3x32mm US 080607 KBPC25 25A 200V Rectifier Diode Bridge 020491 100nF 1096 250Vac Polyester Capacitor Box Assembly 667703 Handle 667701 Grid 659027 White Pot Knob 659026 Orange Pot Knob 657273 Box 347393 Threaded Clog to steady on the floor 227060 15 4ohm Woofer Speaker 210242 Filler for Speaker Box Specify m 210217 Black Sealer specify mt 210215 Adhesive Rubber Foam 10x1 9mm Specify mt 177721 Fixing Plate to fix the Floor Bracket 120965 4 M5e x24mm Threaded Pin 120148 Screw M5x65mm for Handle 120147 Screw M4x8mm for Speakers 667704 Floor Bracket with Threaded Knobs Note Each spare part is single quantity unless otherwise specified Asterisk prefix explanation Omitted First level spare part One asterisk Second level part of previous listed first level part Two asterisk Third level part of previous listed second level part Three asterisk UNE Any request for not above mentioned part must encompass specific description including 1 Model name 2 Section name 3 Module code 4 Reference name 5 Quantity number
39. use damages to oscilloscope inputs circuitry Before removing or installing any modules and connectors disconnect the amplifier from AC MAINS and measure the DC supply voltages across each of the power suppliy capacitors If your measurement on any of the caps is greater than 10Vdc connecta 1000 10W resistor across the applicable caps to discharge them for your safety Remember to remove the discharge resistor immediately after discharging caps Do not power up the amplifier with the discharge resistor connected Head these notes entirely before proceeding to any operation These notes not comprehensive of all damages that possibly occur but includes some specifically advices checks and adjustments relative to this amplified speaker Do not check the amplifier with the speaker connected use only an appropriate load resistor Remarks gt The power supply utilizes a dual bipolar DC rail configuration with low and high voltages one positive and one negative low rail Vcc1 and one positive and one negative high rail Vcc2 Visual Check Check the speakers for any damaging cone breaking interruption or so Before proceed to supply the amplifier check visually the internal assembly if appears an evident damage find the most possible reasons that cause it Check the wiring cables for possible interruptions or shorts If the damage has burnt a printed circuit board don t try to repair it replace with a new one Te

270241 Service Manual

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