AML ez1073pre User manual

ez1073pre Mic Amplifier - Assembly manual
[“Colourbook” Issue 1c]

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

Revision 1 - initial release
ez1073pre “Colourbook” revision history
Revision 1a: Parts list correction of rotary switch type
Better PCB 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 uses ring nut
Alteration of molex connector drawing
Revision 1c: Change to VTB2569 fitting instruction - now has different length screws

Carefully snap apart the 10 PCB’s into individual boards
and trim or file off any excess 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 Stage 1 PCB Input Transformer PCB 2
Trim Pot PCB
Heatsink
Insulator PCB
This side up

Place a “blob” of solder across the two pads (SW6) for 600 Ohm termination
Output Termination
Switch PCB

D2, D3, D4 & D5 = 1N4007 (4)
Diodes

R24 = 1R0 (1)
R25 = 2R2 (1)
R21 = 5R6 (1)
R23 = 10R (1)
Resistors

R19 = 82R (1)
R20 & R22 = 100R (2)
R10 = 120R (1)
R9 = 330R (1)
Resistors

R39 & R52 = 390R (2)
R34, R47, R65, R69 & R71 = 470R (5)
R27 = 620R (1)
R8 = 510R (1)
Resistors

R1 = 1k0 (1)
R59 = 1k2 (1)
R16, R40, & R53 = 1k8 (3)
R26, R35 & R48 = 1k5 (3)
Resistors

R17 & R60 = 2k0 (2)
R13 & R14 = 2k7 (2)
R11, R12 & R18 = 3k3 (3)
Resistors
R38, R51 & R56 = 2k2 (3)

R3 = 4k3 (1)
R31, R44 & R74 = 5k1 (3)
Resistors R2 & R15 = 3k9 (2)

R7 = 12k (1)
R37 & R50 = 15k (2)
R6 & R63 = 18k (2)
Resistors R28, R36, R49 & R68 = 10k (4)

R72 = 39k (1)
R33 & R46 = 47k (2)
R41 & R54 = 51k (2)
Resistors R32, R45 & R61 = 33k (3)

R30, R43 & R57 = 68k (3)
R29 & R42 = 120k (2)
Resistors
R4 & R5 = 6k81 / 0.1% (2)
R55 & R66 = 56k (2)

Resistors R67 = 47R / 3Watt (1)
R62 & R64 = Omitted (leave empty) (2)

C11 = 47pF (1)
C17 & C28 = 100pF (2)
Ceramic
Capacitors
C1 = 180pF (1)
C12, C13 & C39 = 220pF (3)

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

C18 & C29 = 680pF (2)
C24 & C36 = 1n0F (2)
Film
Capacitors
C15 & C27 = 1n5F (2)
C41 = 4n7F (1)

C14 = 10nF (1)
C9 = 100nF (1)
Film
Capacitors
and Relay C10 = 330nF (1) RL1 = 24 Volt DPCO relay (1)