AML ez1081pre User manual

ez1081pre Mic Amplifier - Assembly manual
[“Colourbook” Issue 1]

ez1081pre “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
ez1081pre “Colourbook” revision history

Carefully snap apart the 5 PCB’s into individual boards
and trim or file off any excess tabs.
PCB Preparation
Switch PCB
Input Transformer
PCB 1
Input Transformer
PCB 2
Heatsink Insulator PCB
(Not used on PCB Rev 2)
Main PCB

D2, D3, D7 & D8 = 1N4148 (4)
D5, D9, D10 & D11 = 1N4007 (4)
D4 & D6 = BAT46 (2)
Diodes

R61 = 1R0 (1)
R59 & R60 = 1R5 (2)
R62 = 2R2 (1)
R50 & R58 = 10R (2)
Resistors

R33 = 47R (1)
R7 = 82R (1)
R6 & R24 = 100R (2)
R10, R35, R53 & R65 = 150R (4)
Resistors

R11 = 300R (1)
R46, R49 & R54 = 470R (3)
R63 = 750R (1)
R12, R34, R37, R39, R41, R52 & R55 = 560R (7)
Resistors

R8 = 1k1 (1)
R1 = 1k2 (1)
R2 & R3 = 1k5 (2)
R13 = 1k3 (1)
Resistors

R9 = 2k0 (1)
R38 & R42 = 2k2 (2)
R17 = 2k4 (1)
Resistors
R22 & R29 = 2K7 (2)

R44 = 3k9 (1)
R16 = 4k3 (1)
R26 = 5k1 (1)
R15, R21 & R23 = 7k5 (3)
Resistors

R25, R40, R47, R57 & R64 = 10k (5)
R18 = 12k (1)
R14 = 13k (1)
R43 & R45 = 15k (2)
Resistors

R32 = 18k (1)
R19 = 22k (1)
R30 = 36k (1)
Resistors

R20, R27, R31, R36 & R56 = 47k (5)
R48 = 56k (1)
Resistors
R4 & R5 = 6k81 / 0.1% (2)

C8 & C29 = 47pF (2)
C27 = 68pF (1)
Ceramic
Capacitors
C7 & C13 = 100pF (2)

C16, C30 & C31 = 220pF (3)
CL1 & CL2 = 100pF 3 Terminal L/C Network (2)
C23 & C28 = 100nF (2)
F1 & F2 = Ferrite Bead (2)
Ceramic
Capacitors

C15 = 470pF (1)
C1 = 1n2F (1)
Film
Capacitors
C32 = 4n7F (1)

C14 & C21 = 10nF (2)
C25 = 100nF (1)
Film
Capacitors
and Relay C26 = 330nF (1)
RL1 = 24 Volt DPCO relay (1)

Electrolytic
Capacitors
All positive terminals towards left
C2 & C9= 10uF / 50v (2)
C3, C10 & C19= 22uF / 63v (3)
C11, C12 & C17= 220uF / 25v (3)

Q9 = ZTX690B (1)
Trimmers, Molex and
Small Signal Transistor
(“flat side” towards the Lower edge
of the PCB)
Flat Side
R28 & R51 = 5k0 (2) - Top adjust style
ZTX690B
Molex KK Series - 8 way (1) Tab towards output transformer