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AVD Audio MP312-4, Инструкция по сборке

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FOUR CHANNELS MIC PREAMP MP312-4 

 

                                                                     ©2019                                  WWW.AVDAUDIO.COM 

Longer leg must be solder to left hole marked as “+” 

 

 

Need to bend LED diode as shown below: 

 

 

 

The red arrow indicates: longer leg must be on the left side. 

Insert the diode into the hole on the PCB. Then, insert the diode head into the hole on 
the front panel. The diode should fit very tightly, like a spring. If it comes loose and 
dangles, you can bend just above to the diode head. Usualy it sits down very tightly. 

 

 

Содержание MP312-4

Страница 1: ...four independent channels Each channel has input gain and output attenuator phantom power supply bottom 48v 20Db pad input gain bottom phase reverse bottom mute bottom The box is with external power s...

Страница 2: ...VALUE These parts can be found in the BOM here download MP312 4 BOM Or follow this link http www avdaudio com files boms BOM3124 pdf What you will need for build soldering station basic understanding...

Страница 3: ...are not polarized elements All diodes are directional Make sure you insert them in the correct direction Film capacitors are polarized elements But ceramic capacitors are not polarized Remember please...

Страница 4: ...n PCB Solder all resistors and diodes Each channel has one diode 1N4004 and eleven resistors Next nominal of resistors you can use per channel 160R 200R 510R two of 750R 5K1 two of 6K98 10K 20K 150K D...

Страница 5: ...UDIO COM Don t forget about one 10K resistor It is on the right side of board for power led diode Find three different ceramic capacitors on the each channel 120pf 220pf and two ps of 1000pf Each capa...

Страница 6: ...FOUR CHANNELS MIC PREAMP MP312 4 2019 WWW AVDAUDIO COM 220pf capacitors are marked as 1000pf capacitors are marked as...

Страница 7: ...FOUR CHANNELS MIC PREAMP MP312 4 2019 WWW AVDAUDIO COM Placed each capacitor and solder these 1000pf capacitor is two ps...

Страница 8: ...FOUR CHANNELS MIC PREAMP MP312 4 2019 WWW AVDAUDIO COM 220pf and 120pf capacitors are placed Place 4 pushbuttons per each channel on the board...

Страница 9: ...Push button placed directly on the PCB Must not have any distance from PCB Turn up board and solder each push button You can solder at first only one leg of each pushbutton Try to press switch to pin...

Страница 10: ...FOUR CHANNELS MIC PREAMP MP312 4 2019 WWW AVDAUDIO COM Do not recommend cut push button s legs For DOA we use HARWIN sockets...

Страница 11: ...FOUR CHANNELS MIC PREAMP MP312 4 2019 WWW AVDAUDIO COM You need one completed DOA Insert sockets to DOA as I show below To be sure all sockets are installed fully on DOA Install this to PCB...

Страница 12: ...HANNELS MIC PREAMP MP312 4 2019 WWW AVDAUDIO COM Pull the sockets on 1mm from PCB Solder only one leg first Then solder on the other side Solder the three far legs Then solder the rest Or do as we do...

Страница 13: ...FOUR CHANNELS MIC PREAMP MP312 4 2019 WWW AVDAUDIO COM...

Страница 14: ...FOUR CHANNELS MIC PREAMP MP312 4 2019 WWW AVDAUDIO COM Check our result from other side Ready to do to next step Find four T Pads and four Gain potentiometers...

Страница 15: ...FOUR CHANNELS MIC PREAMP MP312 4 2019 WWW AVDAUDIO COM Install each T Pad to T Pad s place on the board marked T Pad Place the potentiometer directly on the PCB...

Страница 16: ...AVDAUDIO COM Check again the distance from PCB We must have not any distance Go to the down side and solder T Pads Solder first only one leg During soldering push T pad Then you solder other legs We...

Страница 17: ...FOUR CHANNELS MIC PREAMP MP312 4 2019 WWW AVDAUDIO COM Check you are done right And all T Pads are on the board Hope you have done this step good...

Страница 18: ...the next step Take four Gain potentiometers This one must to be placed directly on PCB too Look to the next picture and start solder Gain potentiometers Install Gain potentiometer to their place mark...

Страница 19: ...PREAMP MP312 4 2019 WWW AVDAUDIO COM Break off the locking pin on all potentiometers and T pads You need 9ps from 14 black screws This screws are in the ordered package Tighten all bolts on back wall...

Страница 20: ...FOUR CHANNELS MIC PREAMP MP312 4 2019 WWW AVDAUDIO COM How to looks the case with installed bottom cover The bottom cover has 7 standoffs for PCB Near future will install PCB to these places...

Страница 21: ...FOUR CHANNELS MIC PREAMP MP312 4 2019 WWW AVDAUDIO COM Stick rubber feet in each corner on the bottom cover This will protect your cover from scratches...

Страница 22: ...PREAMP MP312 4 2019 WWW AVDAUDIO COM But now you need XLR connectors Four are MALE and FEMALE See picture below Install each to their place on PCB Installation sites have a different mount and you wil...

Страница 23: ...ANNELS MIC PREAMP MP312 4 2019 WWW AVDAUDIO COM In the each input we use FEMALE XLR In output we use MALE XLR Install all directly on PCB all XLR Don t solder on this step We need to fix all before so...

Страница 24: ...FOUR CHANNELS MIC PREAMP MP312 4 2019 WWW AVDAUDIO COM Install the connector with board into the enclosure as shown And lower the board to the bottom cover...

Страница 25: ...R CHANNELS MIC PREAMP MP312 4 2019 WWW AVDAUDIO COM Make sure the Board is on the bottom cover racks and all XLR connectors are in the holes And all the holes on the Board and the cover rack are the s...

Страница 26: ...FOUR CHANNELS MIC PREAMP MP312 4 2019 WWW AVDAUDIO COM Check each side of PCB...

Страница 27: ...FOUR CHANNELS MIC PREAMP MP312 4 2019 WWW AVDAUDIO COM Find the seven bolts in the order as shown And screw the Board to the bottom cover...

Страница 28: ...FOUR CHANNELS MIC PREAMP MP312 4 2019 WWW AVDAUDIO COM Tighten all bolts In the order there are also 16 screws for XLRs...

Страница 29: ...FOUR CHANNELS MIC PREAMP MP312 4 2019 WWW AVDAUDIO COM Tighten all screws too on the back side Solder one leg to the board on each XLR Solder more than one if you can...

Страница 30: ...FOUR CHANNELS MIC PREAMP MP312 4 2019 WWW AVDAUDIO COM But one will be enough Solder any convenient leg We soldered each of the central leg...

Страница 31: ...FOUR CHANNELS MIC PREAMP MP312 4 2019 WWW AVDAUDIO COM Find it in the order the following bolts for mounting the front panel Take the front panel...

Страница 32: ...FOUR CHANNELS MIC PREAMP MP312 4 2019 WWW AVDAUDIO COM Tighten all bolts on the front panel and front panel Tighten the nut and washer a few can to all T Pads...

Страница 33: ...FOUR CHANNELS MIC PREAMP MP312 4 2019 WWW AVDAUDIO COM We use this on three T Pads Now Remove all bolts from the PCB...

Страница 34: ...xed the PCB using T pads and XLR connectors We soldered on each XLR one leg as you remember This step help us to fix the board into the case And now we can solder and not think that the board can move...

Страница 35: ...FOUR CHANNELS MIC PREAMP MP312 4 2019 WWW AVDAUDIO COM Find in order next positions in the picture You need for this step two of screws washers spring washers and nuts...

Страница 36: ...using cut wires from output transformer I had these before And will not show how I do this If you want see next step about install output transformer And do this step after install output transformer...

Страница 37: ...FOUR CHANNELS MIC PREAMP MP312 4 2019 WWW AVDAUDIO COM On the back side And on the front side...

Страница 38: ...FOUR CHANNELS MIC PREAMP MP312 4 2019 WWW AVDAUDIO COM To be sure You use wires on the Power XLR And lengths of these wires be be enough to solder on PCB...

Страница 39: ...wires correctly If you have other colors of wires or they are different on XLR power supply and preamp Make sure You solder them correctly to the right place And solder all wires Trim excess and long...

Страница 40: ...FOUR CHANNELS MIC PREAMP MP312 4 2019 WWW AVDAUDIO COM For this step you need Four output transformers And you will need next 8 bolts 16 washers 8 spring washers and 8 nuts...

Страница 41: ...FOUR CHANNELS MIC PREAMP MP312 4 2019 WWW AVDAUDIO COM One washer I use on the top side of transformer Same for two holes Same washer I use on the bottom side two ps between transformer and PCB...

Страница 42: ...FOUR CHANNELS MIC PREAMP MP312 4 2019 WWW AVDAUDIO COM And in the end Use spring washer on the bottom side of PCB And lock them with nuts...

Страница 43: ...FOUR CHANNELS MIC PREAMP MP312 4 2019 WWW AVDAUDIO COM Cut each wires of transformer Be sure Length of each wire enough to solder to PCB Check length of each wire before cutting...

Страница 44: ...FOUR CHANNELS MIC PREAMP MP312 4 2019 WWW AVDAUDIO COM Trim excess and long legs Look how it looks like after soldering...

Страница 45: ...FOUR CHANNELS MIC PREAMP MP312 4 2019 WWW AVDAUDIO COM Be sure Each color has right place BROWN and RED wire are here...

Страница 46: ...TR2622 input transformers But if you ordered other transformers Check you have correct schematic or you to change something on the PCB Sometimes it could be different Zobel or sometimes without Zobel...

Страница 47: ...MP312 4 2019 WWW AVDAUDIO COM Install input transformer Be sure The black dot on the transformer coincides the dot on the PCB It is the first pin of transformer Flip the board and solder the input tr...

Страница 48: ...How to looks our preamp after this step We need to solder some capacitors per channel It is 470uf 330uf and 10uf capacitor In the picture below you can see all these capacitors From left to right sid...

Страница 49: ...FOUR CHANNELS MIC PREAMP MP312 4 2019 WWW AVDAUDIO COM Before soldering Be sure You have right position of each capacitor 470uf is in the picture below 330uf capacitor is bellow...

Страница 50: ...FOUR CHANNELS MIC PREAMP MP312 4 2019 WWW AVDAUDIO COM And 10uf capacitor Flip the board and solder each legs Trim excess and long legs...

Страница 51: ...IO COM After soldering capacitors check you have everything done correct And we need to solder two 100uf power capacitors on the right side of PCB Near to Power XLR If you do it with completed case On...

Страница 52: ...2 4 2019 WWW AVDAUDIO COM But second one must cut to install on the PCB Otherwise it will rest against by legs into the case PCB is 1 5mm thickness You must have 2 5mm length legs on capacitor Not les...

Страница 53: ...FOUR CHANNELS MIC PREAMP MP312 4 2019 WWW AVDAUDIO COM Then instal the second And soldering all these...

Страница 54: ...312 4 2019 WWW AVDAUDIO COM Solder JUMPER to the jumper place You ordered LED diodes separately Find this in your order I will show you how to install this You need four of RED color 48V and one GREEN...

Страница 55: ...s shown below The red arrow indicates longer leg must be on the left side Insert the diode into the hole on the PCB Then insert the diode head into the hole on the front panel The diode should fit ver...

Страница 56: ...ANNELS MIC PREAMP MP312 4 2019 WWW AVDAUDIO COM See picture below For best result you can press to one leg on the bottom side And solder other one It really can help you to install this diode good See...

Страница 57: ...FOUR CHANNELS MIC PREAMP MP312 4 2019 WWW AVDAUDIO COM Solder all legs Disassemble the right side of the preamp as shown in the figure below...

Страница 58: ...CHANNELS MIC PREAMP MP312 4 2019 WWW AVDAUDIO COM Take Green Led Diode Bend and install in the same way as the red diode Solder this one from top side of PCB Assemble the right side of the preamp agai...

Страница 59: ...boards We recommend that you completely disassemble the case and remove the Board Although it is possible to wash and not remove the PCB If you have such experience Be careful the board contains comp...

Страница 60: ...FOUR CHANNELS MIC PREAMP MP312 4 2019 WWW AVDAUDIO COM Install the top cover and tighten all bolts Install the caps on the push buttons...

Страница 61: ...After the last step Take the knobs you ordered Set all control knobs to GAIN and OUTPUT The MP312 4 Preamp is now complete Congratulations Wish you the best recordings with our staff For comments or...

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