AMIS250 Series Service Manual Product Description Set-Up
Contents
1. 1 2 3 4 5 6 7 8 ZN a TAPE OUT A VC L a nd x1 1 Di VCC e AG 1 2 VCC o GND R28 VI R31 C25 100R 78LS18 x2 1 10K Ju GND 19vDC Le E CH 1 OUT C45 C43 R32 100u CH 2 OUT 47 I 10K Lo eee A CH 3 OUT re R57 LINE OUT CH 4 OUT u 100R CH 5 OUT TALR e R5 O CH 6 OUT 100R 4 e UL v R53 C VCC DI PHANTOM Swi B B C32 Lt C17 4u7 150P SR n l E TELEPHONE INPUT US only A oh RI toor Til SE 600 600ohm n AMIS 250 MIC INPUT Size Number CD6238 SE Revisi D ID Date 12 Feb 2003 Sheet of File CAAMIS60 120 Manual CD6238 11 DD Drawn By R 2 3 4 5 6 7 8 Of tis ag V14 O ST DOT SOT EXE EHE E Ee R5 159 LET U10 m R20 RIS RI8 RI LK4 H Ic2 Dl R10 Q K R62 Ri R2 RB Australian Monitor INSTALLATION SERIES Uni 2 RIRI A DR gei R19 gt Dt R54 TO TTE n 430 R26 R4 24 R23 D3 HR ro X171 ar ds SS gt E E ee 4 C15 R36 LO 4 M wo NO QC 11QC710QC 9 QC 8 QC 7 QC 6 QC 5 QC 4 0C73 QC72 QC 1 OUTPUT TRAN2. RIR3Q RS R6 R9 RIQ RSS Ri1 R8R7 R23 RIS R40 RI2RI8 R20 R41 R2i R22 R5R52 R451 R44 C36 R37 R36 R54R35 R49 R31 R57R56 C37 LI cs n O cig B ca Ce O Ci7 3 Lod els R2 R30RI 1 JO R14 G R2 IC2 RI R4 R26R25 R47__ R4Z R53 E 48R33 R32 C32 CA YO rj e a CIO C2 O YO O u R28 DI Fi Qe C33 t1 Ss m C rt 1 0 C46 0 036 03 c42 030 025 W c25 d LK2 xii R42 R50LK3 Lir C43 899 ESTILY 92232 526 5000050 36 93 2 2 T AMIS250 Power amp Component List Designator Part Type Description Metalised Poly 100V Electrolytic cae ai Metalised Poly 100V Kap ie Ceramic a e 470n 22P 47u 33u AUT 47u 120p 4u7 47u 120p 470n 15000u 150004 _ Ton BAV21 BAV21 BAV21 TNA4004 14004 1N4004 _4V7 LM1458 LM1458 LM7818 Milla AN Electrolytic 35V Metalised Poly 100V _ Electrolytic 35V Electrolytic a Electrolytic 35V Multi Layer Ceramic 100V Electrolytic 35V rene oy EM __Electrolytic 35V on ii reg Multi Layer Ceramic 100V Electrolytic 50V Electrolytic 50V Mic gt Multi Layer Ceramic 100V Electrolytic 35V EE Multi Layer Ceramic 100V z Electrolytic 35V Metalised Poly 100V Electrolytic 50V _ Electrolytic 50V Meta Poly EE Small Signal Diode E
3. R70 4X 1K SLOW START HT PTC FAN PTC C40 1 2 3 4 6 7 8 vcc AG 1 2VCC vec TAPE OUT T d s R29 e R31 C35 C24 100K R33 C28 O3u 470u lu C38 100R 1 1 4u7 R4 R19 R18 NT 6K8 OK 6K8 De D ATu Tox R12 Ze CA LMI458 x3 1 HOR cui R50 19VDC 1K e e CH2 Cl VCC GND C39 dt R69 IC3B e 100u T IK CH3 LM1458 C21 TAPE R34 R38 JL 4u7 R67 CH4 Les 50K 3 x OUT 7 7 100R CH5 OUT L e C33 R47 C6 CH6 10K Au e 100P R68 I s es C32 a 100P X2 1 eg fa x2 3 VB pi pose BCSA X2 4 9V e x2 5 Jo c x2 6 19V R52 e 1K _ INSERT POINT B R66 1K8 R65 220R R9 2P R64 100R D8 33k At E bi 3 26 Ei SC a ip C43 Ye s 100k Tu 97 de du HI TEMP ke 136 Title AMIS250 MIXER Size Date 12 Feb 2003 CD6239 1 p File Sheet of t I CAAMIS60 120 ManuahCD6239 12 DDB Drawn By RS 7 8
4. 4u7 NP 4u7 150P 150P ANPI 4u7 NP gr UJM __AUT NP 1u 4u7 NP sug e Au7 NP 4u7 NP 4u7 Au NL 150P 4u7 _ Au7 EE en XLR Connector female XLR Connector female XLR Connector female XLR Connector female XLR Connector female XLR Connector male RCA Connector Female RCA Connector Female RCA Connector Female RCA Connector Female RCA Connector Female _RCAConnectorFemale RCA Connector Female RCA Connector Female iu RCA Connector Female BE Goo e eee Non Polar Electrolytic 50V Non Polar Electrolytic 50V Non Polar Electrolytic SOV Electrolytic 35V Non Polar Electrolytic 50V Non Poir Electrolytic CA poe Non Polar Electrolytic 50V Electrolytic 35V Multi Layer Ceramic 100v ii Li SE Multi Layer Ceramic 100v EE Multi Layer Ceramic 100v 1 Electrolytic 35V Non Polar Electrolytic 50V Non Polar Electrolytic 50V Non Polar Electrolytic 50V Metalised Poly 100V SSES Non Polar Electrolytic 50V Electrolytic 35V Non Polar Electrolytic 50V Non Polar Electrolytic 50V Electrolytic 35V Metalised Poly 00V a Metalised Poly 100V KVOT e Bene gt gt Multi Layer Ceramic 100v Multi Layer Ceramic 100v Electrolytic 35V EE a ven _ Electrolytic 35V Electrolytic mann e _ Manufacture s Code 2587210266 2587210266 2587210266 2587210266 2587210266 2587210266 2
5. AMIS250 Series Service Manual Product Description Set Up Test Procedures Component Lists Full Schematics PCB Overlays Australian Monitor Private Bag 149 Silverwater NSW 1811 Australia www australianmonitor com au AMIS250 Circuit Description The AMIS250 mixer amplifier is designed for commercial installations It operates on 230 240 VAC 50Hz 240V version 115VAC 60Hz 115V version and may be desk or rack mounted rack mount kit supplied The AMIS250 delivers 250 watts into a load of 4 ohms 70 or 100 volt line 240V version 25 or 70 volt line 115V version As standard the AMIS250 is supplied self standing with rubber feet It features 6 microphone line input channels as well as a host of unique features including multiple levels of muting and 24 VDC make the AMIS250 a very flexible amplifier The 115V version also has a transformer balanced 600 ohm telephone input 115V version Power Switch This switch controls the switching of AC power to the amplifier A blue On LED will indicate whether the amplifier is switched on or off This switch will not switch DC power on or off in DC operation In DC operation mode the amplifier is always on and the blue power LED will always be illuminated Protect LED A feature of the AMIS250 is high temperature protection In most applications the internal cooling fan will most probably never switch on When used with demanding speaker loads or in difficult operating envir
6. 25V 70v 40 80 7 10 11 12 14 Priority check 7 2 Plug microphone into input 1 and oscillator to input 3 Check for muting of channel 3 7 3 Plug microphone into input 2 Check for muting of channel 3 7 4 Check Mute Disable function Insert Disable Enable link Factory set ENABLE Check 4 tone switched inputs Set output level of tones to approx 14Vrms 2V using Evac tone Make sure channel 3 6 mutes with any of the tone s Check telephone input sensitivity for CH2 Tel input 180 mV output 70V 5V Increase the signal such that you get 76V amp you can see the overload protection coming on with a kink visible on the sine wave if it is there then reduce the voltage to 35V out and then short output Release the shorting and check for the return of output waveform Remove input signal and check for Hum amp Noise lt 20mVrms Reset volumes to minimum THERMAL CHECK Connect load to the amplifier apply signal such that you get 42Vat out put Set for thermal shut off at 110 C 5 C LISTENING TEST Requirements for Listening Test Setup a CD Player b Speaker c Microphone Connect amplifier to the program source and speaker 14 2 Set all input pots at minimum and all tone pots to the centre 12 o clock position and check for turn on thump 14 3 Check CD Player AUX inputs each channel and tone controls for each channel 14 4 Check Priority functions CH 1 over CH 3 CH 6 CH
7. Common or for 25v or 70v speaker loads maximum load of 20 ohms at 70v 25 Positive for 25v line speaker loads use with common 70 Positive for 70v line speaker loads use with common Please ensure that the correct Common is used Low impedance and 25 70v loads can be used simultaneously but please pay careful attention to the overall speaker load Note The minimum impedance or maximum load at 70 volt line should be no less than 20 Terminal Strip The remaining terminals read as Spare Tone Generator Common use with one of the 4 tones listed below Pre Announce Chime Alert Tone Bell Chime Evacuation Tone 600 Ohm Telephone Input 115V version Phantom Power This button enables or disables the 15 volts DC phantom power to all microphone inputs XLR s Do not plug an unbalanced microphone in any amplifier or mixer when phantom power is switched on The phantom voltage is connected through 4k7 1 4W resistors The maximum current draw available per microphone is approximately 3mA Line Output The balanced XLR line level output provides a maximum of 700mV to allow for the connection of up to 6 power amplifiers Pin connections are pin 1 earth pin 2 signal hot pin 3 signal cold The output is electronically balanced with an inverting op amp and buffered with voltage follower op amps Neither hot nor cold output should be grounded when connecting as unbalanced Tape Output Dual RCA
8. metal film 1 2 wait 9111590392 Resistor metal film 1 2 watt 9111590472 a gi 100k Resistor metal film 1 2 watt 9111590104 6K8 Resistor metal film 1 2 watt 9111590682 50K Potentiometer Linear 2021000503 100k Resistor metal film 1 2 watt 9111590104 100k Resistor metal film 1 2 watt 9111590104 120k Resistor metal film 1 2 watt 9111590124 10k Resistor metal film 1 2 watt 9111590103 gr pei iii Di Resistor metal film 1 2 watt 9111590103 sE I E I Potentiometer Linear 2021000503 IN e E EDS Potentiometer Linear 2021000503 fees neri swat 911590223 R3 10K Resistor metal film 1 2 watt 9111590103 R30 22K Resistor metal film 1 2 watt 9111590223 100K Resistor metal film 1 2 watt 9111590104 1K Resistor metal film 1 2 watt 9111590102 6K8 Resistor metal film 1 2 watt 9111590682 OK Rope mean WEE 7L 7 9T 59103 4K7 Resistor metal film 1 2 watt 9111590473 FE EE 50K Potentiometer Linear 2021000503 ake Resistor metal fim 1 2 watt 9111590682 50K Potentiometer Linear 2021000503 AG Bassa MIN wa a Resistor metal film 1 2 watt 9111590332 Resistor metal film 1 2 watt 9111590105 Resistor metal film 1 2 watt 9111590102 REA HEIR wet si 10K Resistor metal film 1 2 watt 9111590103 SK Pesio mean Wa l 59199103 10K Resistor metal film 1 2 watt 9111590103 a Rose Mon 12 wait 9111590393 Potentiometer Linear 2021000503 uuu metil nim AA 9116590102 Resistor metal film 1 2 watt 9111590100 ara ai gio Resis
9. output connectors provide a line level output with a maximum of 350mV into 10k Ohms This output is sourced before the master gain control so the tape output level is not influenced by the operation of the master gain control Microphone Inputs All four inputs are dual mic line with microphone inputs being via a 3 pin XLR connector per channel The mic input sensitivity is 1mV 200 ohms Pin connections are pin l earth pin 2 signal hot pin 3 signal cold Phantom power of 15 volts is available on all microphone inputs Reading from left to right across the rear panel the inputs are 6 5 4 3 2 amp 1 Line Inputs Line inputs 1 2 3 4 amp 5 have an input sensitivity of 150mV 100K ohms Input 6 has an input sensitivity of 300mV a 220K ohms making it suitable for high level inputs such as a CD player Reading from left to right across the rear panel the connections are for inputs 6 5 4 3 2 amp 1 respectively 600 Ohm Telephone Input 115V version The 600 ohm transformer balanced Telephone Input is summed with input 2 through 100k ohms The input sensitivity is 150mV driving the amp to full power Insert Point The Insert Point is located electronically after the master volume pot and before the balancing circuit for the power amp and line output The Insert Point is a 3 conductor Tip Ring Sleeve phone socket which accepts a standard stereo 6 35mm 1 4 jack The connections are Tip Amplifier in
10. run off a battery supply 1f required This is connected via the rear terminal strip The front panel Power Switch will not switch DC power on or off in DC operation In this mode the amplifier is always on 230V 240V Slide Switch 240V version The operating voltage of the amplifier is user selectable between 230V and 240V via a slide switch located on the right of the AC inlet This switch should be set to match the AC voltage of your country The mains transformer is wound with a 230V winding plus a 10V winding internally connected Power Amp The power amp is a push pull single supply amplifier driving a centre tapped transformer The amplifier has an overall gain of approximately x10 and the transformer has a turns ratio of approximately x7 240V version x5 115V version The sensitivity of the amp is approximately 2 7V A particularly good aspect of this amplifier is the current limiting circuit The sensing circuit is a standard rail load line limiting circuit but it is the drive circuit that is important As transistors V12 amp V6 BC640 turn on transistor V11 BC639 it pulls bias current away from the amp through diodes DI amp D4 BAV21 and pulls drive away from the op amp ICT LM1458 through the diode resistor pair D2 R12 BAV21 3k3 amp D3 R23 Individually each topology acts to limit the current in the amp but it is the combination of the two and the fine tuning of there interaction that produces the cha
11. to center e R33 amp R34 Bias adjust pots Amplifier PCB fully anticlockwise Power up 3 1 Turn on the power switch and adjust the variac voltage to 115 VAC Watch current meter for excess current draw Current should not exceed 0 5A 3 2 Check DC power supply at the fuses the measurement should be approximately 40V 1 5V 3 3 Check DC voltage on the mixer board the measurement should be approximately 15V 0 5V 3 4 Check 1 2 VCC on mixer board the measurement should be 8VDC 0 5 3 5 Measure the DC voltages on the IC s of the mixer amp input PCB s Pin 8 15V 5 Pin 4 0V 100mV Pin l 8V 5 but on power it should be P8 18V 5 other remain same 3 6 Put a multimeter across R47 the meter should read 0 3 mV 5 Slowly adjust the preset R 33 so that you measure 2 5mVin addition to the base reading 3 7 Repeat 3 7 for R55 adjusting preset R34 4 AC Check 4 1 Set signal generator to 1mV Turn up Micl volume control to full Watch for irregularities in the output waveform 4 2 Set output voltage to 35V using the master volume control Check voltages across the Emitter resistors on the output power devices 4 3 Voltage should be between 150mV 200mV Min and Max values should be between 33 of the average value i e min max 0 5mV 4 4 Turn the master up to full Check sensitivity of the microphone inputs MIC 1mV 1mV 32V ina 40 load 4 5 Check the output level of the amplifier using each
12. watt AT want aa Resistor metal film 1 2 watt Ro meri iin man E Resistor metal film 1 2 watt Resistor metal film 1 2 watt Resistor metal film 1 2 watt EE EE Resistor metal film 1 2 watt ECT a a Resistor metal film 1 2 watt o i Resistor metal film 1 2 watt Resistor metal film 1 2 watt Resistor metal film 1 2 watt o Resistor metal film 1 2 watt Resistor metal film 1 2 watt Resistor metal film 1 2 watt mem aa Resistor metal film 1 2 watt PTT Resistor metal film 1 2 watt ECT ae eem Resistor metal film 1 2 watt Redi men ee Resistor metal film 1 2 watt Rini o Resistor metal film 1 2 watt AR metallis da wan SI 2152810458 2152810458 2581420102 2581420102 9111590681 9111590104 9111590681 9111590681 9111590104 9111590223 9111590223 9111590223 9111590472 9111590472 9111590100 9111590101 9111590474 9111590472 9111590103 9111590681 9111590224 9111590223 9111590104 9111590104 10R Resistor metal film 1 2 watt 9111590100 22K Resistor metal film 1 2 watt 9111590223 R44 22K Resistor metal film 1 2 watt 9111590223 RAS oe Re e mola AN wet 77 91 1290104 R46 680R Resistor metal film 1 2 watt 9111590681 Ra 680R Resistor metal fim 1 2 watt 9111590681 R48 4K7 Resistor metal film 1 2 watt 9111590472 MK Resistor metal fim 1i2 watt 9111860472 22K Resistor metal film 1 2 watt 9111590223 aR AR a 4k7 Resis
13. 13112 1 39 Hardware Front Panel S600000151 3 61 Lid S600000149 14 45 Rack ears 600000137 4 35 Chassis 600000152 16 15 Barrier Strip 6 6 way barrier connector 2583528306 2 51 Phono connector 1 4 socket 2682110645 XLRF 2567210266 amp 2587110227 Screw washer Black screw w star 2316420308 Screw Blackscrewwo star 2316421306 Knob volume amp master 9346110015 Acrylic cover for 9847960006 90 31 6 way terminal
14. 2 over CH 3 CH 6 14 5 Check that all generated alert evacuation tones function 4 6 7 8 R47 0 047 R60 D9 10R 1N4004 FAN e E 14 esl 4u7 R5 RA Je 313 R9 T v9 47k TIP42C v7 BC639 amp R7 1 1k OUTPUT JR C27 oc 1 Farsi R33 Ir 100R 8 2 5 a 330R xa V3 BAT TERMINAL BDi40 T cn 7 s Es D2 DI TO 24VAC e IN4004 1N4004 120P BAv2i BAV2i RI POWER TR FAN 4K7 R64 C23 IC3A La gt INPUT IK 680P LM1458 Yn RG 11 1 2VCC oo VII GND R57 C639 IK N C R30 oc10 Kl FAN ON 10K CUT OUT Y CT OUTPUT TR Qc11 CU Ye FROM FUSE m C ATT TOK Tou ds s R20 4K7 C13 Jh Sed 3 18 FROM FUSE F2 330R oc 2 8 C18 OUTPUT TR t47 ON UR25 I K NTC 35VDC TO FI amp F2 0C 5 35VDC FROM BRIDGE 00 6 BAT VIA DIODE 00 7 GND BATTERY 0C 8 GND BRIDGE RECT QC 9 QC11 R31 10R 35VDC IC2 LM7818 R65 10R C26 470u IF AMIS 250 POWER AMP Size Number CD63 0 6 SE 1 E A3 Date 12 Feb 2003 Sheet of File C3AMIS60 120 Manual CD6306 1 DDB Drawn By R 1 2 3 4 5 6 7 8
15. 587110227 2581420102 2581420102 2581420102 2581420102 2581420102 2581420102 2581420102 2581420102 2120250479 2120250479 2120250479 2120250479 2120250479 2120250479 2121230479 2127180155 2127180155 2120250479 2127180155 2121230479 2120250479 2120250479 2120250479 2120250479 2120250479 2120250479 212 1290819 2124182100 2124182100 2127180155 2121230479 2121230479 2121230479 2124182100 2121230479 2121500181 2127180155 SE Au Electrolytic 35V Ju Metalised Poly 100V 4u7 Electrolytic 35V ea a NE ee 150P Multi Layer Ceramic 100v Mar ES 1150P Multi Layer Ceramic 100v 2127180155 160P Muli Layer Ceramic 100v 2127180155 ___ 4u7 NP Non Polar Electrolytic50V_ 2120250479 10A SB GE IC1A LM1458 Dual op amp DIP 8 Pin 2152810458 IciB c A Dude ma DIP MO aie IC2A LM1458 Dual op amp DIP 8 Pin 2152810458 IC2B LM1458 Dual op amp DIP 8 Pin 2152810458 IC3A IC3B L R R1 R11 R13 R15 RII RS R20 R24 R28 R31 R33 R35 R37 Bn Qr M R4 R40 LM1458 LM1458 RCA RCA 680R 100K 680R NM 680R SER 100K 22K 22K 22K 4K7 ee 4K7 TOR 100R AU 100K 4k7 10K 680R 220K 100K 100K OE 100K Dual op amp DIP 8 Pin Dual op amp DIP 8 Pin RCA Connector Female RCA Connector Female Resistor metal film 1 2 watt mem a a Resistor metal film 1 2 watt RL meli own ee Resistor metal film 1 2
16. C TIP36C TIP36C TIP36C Resistor metal film 1 2 watt 2P2T Relay Transistor Transistor Transistor Transistor TOP 3 Transistor TOP 3 ip Transistor TOP 3 Transistor TOP 3 Transistor TOP 3 9111590473 2523120001 2141400139 2141300042 2144200640 2141600036 2141600036 2141600036 2141600036 2141600036 2141600036 BC546 TIP36C TIP36C TIP36C TIP36C TIP36C BD140 BC639 BC639 Transistor TOP 3 Transistor Transistor TOP 3 Transistor TOP 3 Transistor TOP 3 Transistor TOP 3 Transistor TOP 3 _ Transistor Transistor Transistor 2141600036 2144200546 2141600036 2141600036 2141600036 2141600036 2141600036 2141400140 2144200639 2144200639 TIP42C era Transistor Transistor 2144200639 _ 2141300042 AMIS250 Mixer Component list Designator Part Type Description Metalised Poly 100V Electrolytic C rM e EE _Electrolytic 35V Electrolytic Ge 4u7 03u AUT 47u 4u7 1u odru 100P 470u 10u Au7 100u 22u _22P TO a 47u BAV21 BAV21 BAV21 LM358 LM1458 LM1458 LM1458 Electrolytic 35V Multi Layer Ceramic 100V _ Electrolytic 35V Electrolytic TE as Electrolytic 35V Electrolytic 35V Metalised Poly 100V ___ Electrolytic 35V Metalised Poly 100V Soen lave ene ka OS Multi Layer Ceramic 100V Mule Ceramic 000 ems Electrolytic 35V a pt _ Electrolytic 35
17. Ring Mix Output Sleeve Ground The switched contacts are used to break the signal internally When an external processor is used via the insert point it only affects the power amplifier section and line output of the AMIS60 amp AMIS120 The tape output remains unprocessed Tone Generators Four separate tones are available from the in built tone generator board All four tones can be activated individually via a contact closure connected to the screw terminals on the rear of the amplifier When any tone is activated all inputs except for inputs 1 and 2 will automatically mute The level of the tone generator is controlled by the pot labeled R6 located behind the Bass adjustment pot This pot adjusts the level for all 4 tones Tones available on the AMIS250 include Evacuation Tone Alert Tone Bell Tone Pre Announce Chime Theses inputs are pulled up to 5VDC internally through Ik resistors The tones are generated through a combination of digital frequency modulation and analogue amplitude modulation The output of the microcontroller IC7 PIC16C55A on pin 6 is a 0 5V square wave of varying frequency depending on the tone selected This signal is amplitude modulated using a VCA IC8 M5222P The envelope is controlled by the charging and discharging of the electrolytic capacitor C40 with the sink and sourcing of current on the microcontroller outputs pins 8 9 amp 17 VOX Muting This feature provides automatic muting ch
18. SFORMER OUTPUT o E a oa o FI ER 5S oft gt War ozaa o o an a aoarcEk SL 2597 EF 6233 C24 C23 GA R54 R57 R71R14X3 1 LK8 RI C23 C35 pj JP24 RURILKILKS LK5 R44 LK4 R6SR58 C21 R48 ES RSL Ce Ice D8 c41 ES c42 Sta n vo C16 c9 R47 s peo E d me Jolw Swa De O sil 8 C20 c33 O O Y SCHI O sp R55R56 c272 UU CILK6LKR7 C38 R37R29R7 R8R30R23R24R59 R42R41 A 0 IA c27 O C2 Cal FA R64R61 o IDEE DODO m DORIA gt R70RI2 RSR67 A Botz Re a 4 C43D6 D7 O C 1n49 C32 ICE RB Geck R45 5 IC RIZE leo R62 107 O oo E Deepen O X57 BIO R21 C13C14R2 R25 R26 R27 R28 R5 R10 R4 RI8R36C28 D R34 CC R38 R39 R40 637 6239 E CHI CH2 CH3 CH4 CHS CH6 BASS MID TREBLE R29
19. TA n u Small Signal Diode CARE i eee Small Signal Diode o Rectifier Diode Rectifier Diode Rectifier Diode Rectifier Diode Dual op amp DIP 8 Pin Dual op amp DIP 8 Pin Regulator T0220 Dual op amp DIP 8 Pin Manufacturer s Code 2124262472 2124282101 2121250470 2124282331 2121230479 2121250470 2127180121 2121230479 3131280470 2121250470 2127181681 2127181101 2121250470 2122250017 2122250017 21371330479 2127180121 2124262472 2121250153 2121250153 2133400201 2136010240 2133400201 2133400201 2133440004 2133440004 2133440004 2136010479 2152810458 2152810458 2151370815 INA 2152810458 Dual op amp DIP 8 Pin 2152810458 Link Link SEO 9111590102 GT 290107 9111590332 ini 9111590473 ui 9111590332 ein Resistor metal film 1 2 watt Rara d 7 Resistor metal film 1 2 watt Aaa anos Resistor metal film 1 2 watt LON m Resistor metal film 1 2 watt 470R 330R 1k Resistor metal film 1 2 watt Resistor metal film 1 2 watt Resistor metal film 1 2 watt Resistor metal film 1 2 watt IBssitor melalfim 12 EE Resistor metal film 1 2 watt Resistor metal film 1 2 watt Resistor metal film 1 2 watt Rosso esi 10K NTC Thermistor TOR 1k 100K 470R 40K 10R 100R 100R 10K par OR22 OR22 ED em ee Ta Resistor metal film 1 2 watt Resistor metal film 1 2 watt Resistor metal film 1 2 watt Resistor metal f
20. V Manufacturer s Code 2124180562 2121230479 2121230479 2127280336 2121230479 2121230479 2121230479 2128280019 2124262472 2127280336 5157181578 2121230479 2121230479 2121230479 SE ayer CRA Multi Layer Ceramic 100V ES o eme Electrolytic 35V Electrolytic 35V __Electrolytic 35V Electrolytic O men Electrolytic 35V Eni joy nemen electrolytic 35V Mia sei eee Multi Layer Ceramic 100V Metalised Poly 63V Metalised Poly 63V Electrolytic 35V Electrolytic 35V Epa aaa COX Electrolytic 35V 3 0mm Red Led Small Signal Diode Sal Signal ng a Small Signal Diode NI Signal En Jn Small Signal Diode Sl Signal T T a nn Dual op amp DIP 8 Pin bi pont EE Dual op amp DIP 8 Pin din DualopampDIP8Pin Dual op amp DIP 8 Pin Dual op amp DIP 8 Pin 21 TIO 2121230471 2121220100 2121230479 2121220101 3151538478 2121250220 557131250 2127181220 2124262472 2124262472 2121230479 2121250470 2121230479 2121220100 2137200003 2133400201 2133400201 2133400201 2152800358 2152810458 2152810458 2152810458 LM1458 Dual op amp DIP 8 Pin 2152810458 M5222 VCA DIP 8 Pin l 2153850222 16C55 PIC 16C55X1 TP 28PIN IC8 M5222 VCA DIP 8 Pin D eee Region A DA 10K Resistor metal film 1 2 watt 9111590103 50K Potentiometer Linear 2021000503 R11 1M Resistor metal film 1 2 watt RI 0 Rao ari on Resistor metal film 1 2 watt 9111590472 Resistor
21. annels 3 amp 4 when signal is applied to either channels 1 or 2 It is normally used so that a paging microphone can have priority by muting over background music The muted channels will automatically ramp back up to normal volume when the signal on channels 1 and or 2 is no longer active The amplifier ships with the VOX muting function enabled To disable the VOX muting move the jumper labeled JP2 located just to the left and behind the level pot for channel 1 to the middle and rear pins Factory setting is with VOX enabled with the jumper on the middle and front pins Channels 3 4 5 amp 6 are summed through IC1A LM1458 or equivalent to the VCA IC4 M5222P which does the muting The VCA is held on i e no attenuation by R22 10k pulled to the reference voltage and the reverse biasing of diode D2 BAV21 or equivalent by R20 and R21 This is to eliminate any attenuation by the op amp IC1B LM1458 or equivalent and its supply which may be different to the internal reference voltage of the VCA The control pin of the VCA is pulled down by op amp IC1B This op amp runs at very high gain to activate on even very small signal The jumper JP2 shorts out the feedback resistor thus removing the sensitivity The attack of the muting circuit is controlled by the charging of C13 47uF through R20 100k and the release by the discharge if C13 through R16 2k2 Note that VCA will mute at 250mV 80dB below the reference voltage so the muting w
22. ill occur only over the range of approximately depends on VCA production batch 7 2V to 7 5V The charging of the capacitor occurs from approximately 1V to 8 1V VCA M5222P pin out 1 Outputl 2 Inputl 3 Reference voltage Vcc 4 Gnd 5 Control 6 Input2 7 Output2 Note The M5222P is a current in current out device Voltage conversion is done through resistors The maximum input current is 50uA rms Current gain is 0 5 Fuse Sizes 240V version Mains 230 VAC 6 3 Amperes Slow Blow DC 10 Amperes Slow Blow 115V version Mains 230 VAC 8 Amperes Slow Blow DC 10 Amperes Slow Blow TEST PROCEDURE MODEL AMIS 250 US Perform physical inspection Visual Inspection stage 1 1 Check e All screws for tightness esp bridge rectifier and transistor bolts e Earth connection for good contact XLR GND to AC earth e All wiring points for good contacts soldering and crimping PRETESTING PRE TESTING SETUP REQUIREMENT a Oscilloscope b Variac c Multimeter d Load 4Q e Signal generator Set up amplifier for test 2 1 Check e AC fuses 8A 20mm e DC fuses 10A 20mm e 2 2 Connect amplifier to Variac 0 VAC Signal generator micl no signal Resistive load 40 on 4Q terminal Connect 24V DC supply externally for the relay on amplifier PCB Optional test for 24V DC operation 2 3 Reset controls e Volume controls to minimum e Bass treble control
23. ilm 1 2 watt Resistor metal film 1 2 watt Metal oxide resistor 2W Resistor metal film 1 2 watt Resistor metal film 1 2 watt Resistor metal film 1 2 watt DEE Resistor metal film 1 2 watt EA o o Resistor metal film 1 2 watt Resistor metal fim 1 2 walt Wire wound 5 watt resistor Wire wound 5 watt resistor Wire wound 5 watt resistor Wire ound wait resistor dd EV Wire wound 5 watt resistor WI Resistor metal film 1 2 watt OT i i Wire wound 5 watt resistor wirewendSwanieseor reme Wire wound 5 watt resistor nun 0 047 Wire wound 5 watt resistor 0 047 Wire wound 5 watt resistor Resistor metal film 1 2 watt ar ESTA e am Resistor metal film 1 2 watt Pei Metal oxide resistor 2W Reo men Ee Resistor metal film 1 2 watt Resistor Fatal fim aw pem Resistor metal film 1 2 watt Resistor metal film 1 2 watt Resor mori io MM 9111590471 9111590331 9111590102 9111590472 9111590105 9111590102 9111590332 2111911103 9111590102 6471290975 9111590104 9111590471 9111590103 2111221100 9111590101 9111590101 9111590223 9111590474 9111590272 9111590103 9111590103 2111450228 R42 OR22 Wire wound 5 watt resistor 2111450228 2111450228 2111450228 2111450177 9111590103 2111450228 2111450228 2111450177 2111450177 9111590102 9111590472 2111221100 9111590103 9111590102 9111590102 47k BD139 TIP42C BC639 BC640 TIP36
24. of the input channels 4 6 Measure 25V line 70V LINE 4 7 Check tape outputs L and R 300mV 50mV Measure on RCA socket 4 8 Check line outputs Approx 2 0V 25mV 5 Function Checks 5 1 check the position of header links a Vox muting enabled b VCA Con Disabled 5 2 Keep signal in CHI insert INSERT PLUG having external signal of different frequency the out put should cut off and switch over to applied insert signal check signal on inset plugs ring terminal with respective ground should be 300mV Remove insert plug 5 3 Check Phantom Switch for on off operation Measure Phantom voltage on an XLR inputs the measurement should be 14 5VDC Reset the phantom switch 5 4 Switch off the set connect battery 24V check for rated out put power out put signal will clip up to 2 on battery power FINAL TESTING Requirements for final testing a Load 400 b Multimeter c Oscilloscope d Microphone e Variac 6 Check sensitivity of all channels 6 2 Mic input CH1 CH4 1mV out put 70V 5V 6 3 AUX input CH1 CH5 150mV out put 70V 5V 6 4 AUX input CH6 150mV out put 32 5V 1 5V 6 5 Check the Power bandwidth of CH 1 MIC input 68Hz 5Hz 15K Hz 2KHz 6 6 Check Bass control 100HZ 10dB TOL 1dB MID Control 10dB TOL 1dB and treble 10kHz 10dB TOL 1dB 6 7 Check that input signal and output signal are in same phase by comparing CH 1 AUX Input and all other Outputs
25. onments the fan may regularly switch on to cool the amp down and then switch off again This switching on and switching off is quite normal The Protect function is there to protect the amplifier from high temperature problems which would only occur if the fan stopped working or became clogged up In this very rare occurrence the amplifier will shut down and the protect LED will illuminate The amplifier will automatically restart once it s internal temperature has fallen below the fan switch on temperature The fan switch on temp is preset at 60degC by the trimmer on the power amp board R58 10k and the NTC R25 10k 25degC The high temperature trip point is set at the factory by trimmer R58 Turning the trim pot clockwise will cause the amplifier to trip and mute at a lower temperature AC Power Inlet The operating voltage is 230 240 VAC 50 Hz 240V version 115 VAC 60Hz 115V version The 3 pin IEC power inlet 1s located on the bottom left of the rear panel and accepts a standard mains power lead fitted with an IEC connector Before plugging in a power lead please check the rear panel of the amplifier to ensure that the voltage switch is set correctly for your part of the world The inlet is equipped with an in built AC fuse holder fitted with a 6 3 amp 240V version 8 amp 115V version fuse plus a spare within the holder Power consumption is 550 VA 24 Volt DC Power Inlet The AMIS250 features optional 24VDC power to
26. racteristic soft limiting without the harsh crossover distortion It is not until the amp is in hard clip does the amp produce the high freq crossover distortion This makes for nice sounding current limit that allows for soft distorted peaks to get through but limits continuous excessive current while maintaining thermal stability Speaker Output Terminal Strip 240V version The screw terminals on the left hand side of the strip allow access to the direct speaker outputs of the amplifier Reading from left to right the terminals are COM Common or for low impedance speaker loads 4 ohms 4 Positive for 4 ohm speaker loads use with common COM Common or for 70v or100v speaker loads maximum load of 40 ohms at 100v 70 Positive for 70v line speaker loads use with common 100 Positive for 100v line speaker loads use with common Please ensure that the correct Common is used Low impedance and 70 100v loads can be used simultaneously but please pay careful attention to the overall speaker load Note The minimum impedance or maximum load at 100 volt line should be no less than 40 Ohms 115V version The screw terminals on the left hand side of the strip allow access to the direct speaker outputs of the amplifier Reading from left to right the terminals are COM Common or for low impedance speaker loads 4 ohms 4 Positive for 4 ohm speaker loads use with common COM
27. tor metal film 1 2 watt 9111590102 Des mean Te 7 77 7 79110590190 470R 10K Not Required Not Required Resistor metal film 1 2 watt Resistor metal film 1 2 watt 9111590470 9111990105 9111590103 40K 47k 10K 2k2 Resistor metal film 1 2 watt Cermet Horizontal Resistor metal film 1 2 watt Resistor metal film 1 2 watt Resistor metal film 1 2 watt Resistor metal film 1 2 watt 2002211103 9111590473 9111590103 So 9111590222 9111590101 220R 100R 1K 1K 10K 1k RN 100R 100R BC546 BC546 jBC946 _ Resistor metal film 1 2 watt Resistor metal film 1 2 watt Resistor metal film 1 2 watt Resistor metal film 1 2 watt Resistor metal film 1 2 watt Resistor metal film 1 2 watt Resistor metal film 1 2 watt Resistor network Resistor metal film 1 2 watt Resistor metal film 1 2 watt EE Resistor metal film 1 2 watt EE Resistor metal film 1 2 watt Resistor metal film 1 2 watt Resistor metal film 1 2 watt DEE Transistor Transistor Transistor I rere aM en 9111590221 39010 9111590101 9111590102 9111590102 9111590103 9111590100 9111590101 9111590104 9111590473 9111590101 9111590103 9111590473 9111590333 2144200546 2144200546 2144200546 TADO AMIS250 Input PCB component list Designato Part Type Description C15 C16 C28 C29 qe 2 XLR 3 XLR 4 XLR 5 XLR 6 XLR RCA RCA RCA 4u7 NP BEE 4u7 NP UNE 4u7 NP Ne
28. tor metal film 1 2 watt 9111590472 7 Resistor metal film 1 2 watt 9111890472 100K Resistor metal film 1 2 watt 9111590104 AA AO OT BOO R56 100R Resistor metal film 1 2 watt 9111590101 R57 100R Resistor metal film 1 2 watt 9111590101 R6 22K Resistor metal film 1 2 watt 9111590223 R7 AKT7 Resistor metal film 1 2 watt 9111590472 R8 4K7 Resistor metal film 1 2 watt 9111590472 22K Resistor metal film 1 2 watt 9111590223 00 6006 Isolation ermer e oa 78LS18 Regulator 18V 2151370818 AMIS 250 Major Components price list Wi Partt Description Manufacturer code in house AUD Mixer Mixer PCB 5728MAMIS250816 Output Output PCB assy S5728MAMIS250518 Display PCB S5728MAMIS250S21 Transformers 230 240VAC Mains 230 240V 2651983262 120VAC Mains 120V Output Output 2651983264 FUSE 12 Amp DC rail fuse 2541201125 E PNP TO220 transistor 2141300042 TIP42C 2 00 NPN TO92 2144200639 S7007 0 16 PNP TO92 2144200640 S7008 0 16 BD139 NPN TO92 2141400139 S7009 0 22 LM1458 IC Dual Op amp 2152801048 LM1458 0 26 M833N IC Dual Op amp 2157800833 LM833 1 05 M358 IC Dual Op amp 2152800358 LM358 1 05 M78L05 IC Regulator 2151270805 LM7805 0 17 LM7818 IC Regulator 2151370818 LM7818 0 52 PIC16C54 XTP Program IC 2159601654 120PIC 4 17 LM5222 IC VCA 2153850222 0 57 10k Thermistor 2111911103 0 29 Switches amp Pots Volume Pot channel amp master 2021000503 0 56 Power switch Round rocker switch 25112
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