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AML ez1073pre, Assembly Manual

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ez1073pre Mic Amplifier - Assembly manual

[“Colourbook” Issue 1c]

Summary of Contents for ez1073pre

Page 1: ...ez1073pre Mic Amplifier Assembly manual Colourbook Issue 1c...

Page 2: ...ez1073pre Colourbook Contents Section 1 Colourbook assembly guide Section 2 Setup and Calibration Section 3 Schematics diagrams and PCB Overlays Section 4 Parts List...

Page 3: ...prep instructions Correction to heatsink fitting instructions Clarification of sub card identification Removal of protective coating from chassis Revision 1b Change to knob fitting instruction now us...

Page 4: ...xcess tabs Ensure that the 2 areas highlighted are filed trimmed completely flat PCB Preparation Switch PCB Main PCB Input Transformer PCB 1 Output Stage PCB Surge Control PCB Gain Stage 2 PCB Gain St...

Page 5: ...Place a blob of solder across the two pads SW6 for 600 Ohm termination Output Termination Switch PCB...

Page 6: ...D2 D3 D4 D5 1N4007 4 Diodes...

Page 7: ...R24 1R0 1 R25 2R2 1 R21 5R6 1 R23 10R 1 Resistors...

Page 8: ...R19 82R 1 R20 R22 100R 2 R10 120R 1 R9 330R 1 Resistors...

Page 9: ...R39 R52 390R 2 R34 R47 R65 R69 R71 470R 5 R27 620R 1 R8 510R 1 Resistors...

Page 10: ...R1 1k0 1 R59 1k2 1 R16 R40 R53 1k8 3 R26 R35 R48 1k5 3 Resistors...

Page 11: ...R17 R60 2k0 2 R13 R14 2k7 2 R11 R12 R18 3k3 3 Resistors R38 R51 R56 2k2 3...

Page 12: ...R3 4k3 1 R31 R44 R74 5k1 3 Resistors R2 R15 3k9 2...

Page 13: ...R7 12k 1 R37 R50 15k 2 R6 R63 18k 2 Resistors R28 R36 R49 R68 10k 4...

Page 14: ...R72 39k 1 R33 R46 47k 2 R41 R54 51k 2 Resistors R32 R45 R61 33k 3...

Page 15: ...R30 R43 R57 68k 3 R29 R42 120k 2 Resistors R4 R5 6k81 0 1 2 R55 R66 56k 2...

Page 16: ...Resistors R67 47R 3Watt 1 R62 R64 Omitted leave empty 2...

Page 17: ...C11 47pF 1 C17 C28 100pF 2 Ceramic Capacitors C1 180pF 1 C12 C13 C39 220pF 3...

Page 18: ...C46 330pF 1 CL1 CL2 100pF 3 Terminal L C Network 2 C5 C8 C16 C20 C30 C32 C47 C48 100nF 8 F1 F2 Ferrite Bead 2 Ceramic Capacitors...

Page 19: ...C18 C29 680pF 2 C24 C36 1n0F 2 Film Capacitors C15 C27 1n5F 2 C41 4n7F 1...

Page 20: ...C14 10nF 1 C9 100nF 1 Film Capacitors and Relay C10 330nF 1 RL1 24 Volt DPCO relay 1...

Page 21: ...ectrolytic Capacitors Not orientations of positive terminals differ C22 C34 C43 C44 C45 100uF 25v 5 C19 C21 C23 C25 C31 C33 C35 C37 C40 C50 22uF 63v 10 C26 C38 C49 470uF 16v 3 C42 Omit nothing fitted...

Page 22: ...Trimmers and Molex R58 R70 5k0 2 Side adjust style Molex KK Series 8 way 1 Tab towards output transformer...

Page 23: ...Headers J4 10 Way Box Header 1 PL 28 2 Pin header 1 Fit a jumper between pins 3 4 of header J4 as shown Do NOT fit a jumper to PL28...

Page 24: ...Small Signal Transistors NOTE ORIENTATIONS Q2 Q3 Q4 Q5 Q6 Q7 Q8 Q9 Q10 BC550C 9...

Page 25: ...3 Important The toggle switches are surprisingly sensitive to heat solder one pin on each switch and then allow to cool before continuing Make sure that the toggle switches are seated perfectly so th...

Page 26: ...x 2 way Trim Pot PCB 1 x 4 way Surge Control PCB 2 x 4 way Gain stage 3 PCB 1 x 4 way 1 x 3 way Gain stage 1 2 PCBs 2 way 4 way 10 way 8 way 4 way 4 way 4 way 4 way 4 way 3 way 3 way Assembly Tip Use...

Page 27: ...ar sides towards the heatsink with a TO247 insulator behind the TIP3055 device and a TO220 insulator behind and a bush in front of the 7808 Secure in place with an M3 x 12mm screw and Nyloc nut Trim l...

Page 28: ...not discard Fit the assembly into the main PCB and then tighten up the screws but not too tightly Remove the assembly again and then solder the transformer to its PCB On the end of the transformer wh...

Page 29: ...itch PCB into main PCB ensuring that it is perpendicular and solder in place 90 Assembly Tip Solder only a couple of pins until you have fitted the trim pot PCB next page just in case it needs a littl...

Page 30: ...der in place 90 Assembly Tip The bush of the pot slots into the top of the switch PCB After Soldering the trim pot PCB to the main PCB fit the pot nut until it JUST TOUCHES the front of the switch pcb...

Page 31: ...amplifiers and surge control PCBs into main PCB ensuring that it is perpendicular and solder in place 90 Assembly Tip Gain stage 1 2 are identical however they have different component idents PL18 PL1...

Page 32: ...Large Electrolytic Capacitors All positive terminals towards left C2 C3 C4 C6 C7 1000uF 35v 5...

Page 33: ...he self adhesive silver washer over the pin holes to stop the pin coming out Make sure the spindle is in the position shown before fitting pins 0 clicks up from factory setting Discard the nut and sha...

Page 34: ...tion Fit the 48v indicator LED to the solder side of the PCB such that the base of the LED aligns with the front edge of the PCB Flat of LED Solder Side Long Leg gn front edge of LED base with edge of...

Page 35: ...mbly 2 x M3 Nyloc nut Install PCB onto chassis Secure PCB to chassis with 5 x M3x8 Sems screws 1 Remove the protective plastic coating from the chassis 2 Secure faceplate to chassis with 2 x M3 Nyloc...

Page 36: ...0 25 30 35 40 45 50 55 60 300 1200 65 15 AML UK ez1073 pre 48v 10 20 25 30 35 40 45 50 55 60 300 1200 65 15 Install the ring nut for the rotary switch The shakeproof washer is not required Install the...

Page 37: ...thread locking adhesive applied to the end of the screw Overtightening will alter the air gap that would not be good Brown Violet Red Green Blue Orange Black Yellow M3 x 30mm screw at front 2 holes M3...

Page 38: ...typically measure about 40 50 mV after relay clicks 4 Apply a signal of 40dBu to the input and then turn front panel gain control up to 60dB 6 Measure the output signal and adjust the Gain Adjust tri...

Page 39: ...d Agnd Agnd Agnd Agnd Sub Agnd Sub Agnd Sub Agnd Sub 48v Sub 48v switched SUB 48v LED switched SUB 16v pin 12 Sub Post Pad Hot Sub Post Pad Cold Sub Agnd Input Tx paralleled cold Sub Input Tx parallel...

Page 40: ...v O P Phase Transformer fitted on this side This side up Output Stage Sub Assembly Surge Control Sub Assembly Gain Stage 1 Sub Assembly Gain Stage 2 Sub Assembly Serial No Bias Test Bias Adjust Molex...

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Page 43: ...Resistor 0 25W 4k3 R3 Resistor 0 25W 6k8 0 1 R4 5 Resistor 0 25W 18k R6 R63 Resistor 0 25W 12k R7 Resistor 0 25W 510R R8 Resistor 0 25W 330R R9 Resistor 0 25W 120R R10 Resistor 0 25W 3k3 R11 12 R18 R...

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