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