AML ezPDI-500 Manual de usuario
ezPDI-500 Passive DI - Assembly manual
[“Colourbook” Issue 1]
ezPDI-500 “Colourbook” Contents.
Section 1 - “Colourbook” assembly guide
Section 2 - Schematics diagrams and PCB Overlays
Section 3 - Parts List
Revision 1 - initial release
ezPDI-500 “Colourbook” revision history
The kit is intended to be used in a lunchbox / 500 series rack.
However, as it is entirely passive (needing no power), it can be used as a “standalone” unit.
An additional PCB is provided which can be used to easily provide XLR termination. The parts for that option are not provided.
ezPDI-500 - Lunchbox or Standalone ?
Unfortunately, there is no standard for Chassis Ground/Analogue Ground linking in 500 series racks / lunchboxes.
It varies depending upon which product you use.
Some manufacturers fit a switch on the rear to allow the chassis/analogue grounds to be separated or connected.
Some units have in internal link which can be easily removed.
Some units have in internal link which must be cut or de-soldered.
If the ezPDI-500 is used in a unit where the Chassis Ground and Analogue Ground are connected,
the Ground Lift switch on the ezPDI-500 will be ineffective.
Lunchbox/500 series Racks and Earth Lift.
Carefully snap apart the 3 PCB’s into individual boards
and trim or file off any excess tabs.
Ensure that the 3 areas highlighted are filed / trimmed completely flat
PCB Preparation
Main PCB
Trim Pot PCBXLR Option PCB
Place a “blob” of solder across the two pads (SW7) for Zobel network termination
Zobel Network Termination
For 500 series “lunchbox/rack” use:
Ground lift filtering selection
(on rear of trim pot PCB)
Turn Trim Pot PCB over
Place a “blob” of solder across the two pads of SW8
Do not put a “blob” on SW9
For “standalone” use:
Place a “blob” of solder across the two pads of SW9
Do not put a “blob” on SW8
OR
STANDALONELUNCHBOX
SW9 = OFF
SW8 = ON
SW9 = ON
SW8 = OFF
R2 & R3 = 100R (2)
R4 & R10 = 1k0 (2)
R13 = 1k8 (1)
Resistors
Resistors R5, R6, R7, R8 & R9 = 7k5 (5)
R11 & R12 = 1M0 (2)
F1, F2, F3, F4, F5 & F6 = Ferrite Bead (6)
RSIL1 = 4M7 (6)
C7, C8, C9, C10 & C13 = 47pF (5)
Ceramic
Capacitors C14 & C15 = 220pF (2)
C1, C2 & C11 = 100nF (3)
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