Millennia TD-1 Twin Topology Half Rack Recording Channel User Manual
Page 13
TD-
Twin Direct
2
power line. Both fuses must be installed. To change the mains voltage
selection, remove IEC power connector and assure that the TD-1 is not
connected to mains power. With a non-conductive tool, gently pry the
fuse block away from the power entry module. Remove the two fuses and
replace both with type as shown below. Slide out the internal PC Board,
turn it over, and reinsert the PCB so that the desired AC mains voltage
appears in the viewing window. Double check that the fuses installed
correspond to the AC mains voltage range which appears in the viewing
window. Gently push the fuse block back until it snaps flush and snug.
FUSES:
For 100-120 VAC mains, use two 5 x 20 mm, 500 mA, slow blow (N.
America), 250 V, Littelfuse 218 or equiv.
For 200-240 VAC mains, use two 5 x 20 mm, 250 mA, slow blow (N.
American), 250 V, Littelfuse 218 or equiv.
POWER ENTRY “IEC Power Receptacle”
An IEC-type AC line-power receptacle for use with removable cords. Use
only the power cord provided with the TD-1 unit or equivalent U/L ap-
proved type SV, SVT, SJ, or SJT AC power supply cord. Never defeat the
third pin earth ground on the power cord. If earth ground lifting is desired,
use the Earth Lift switch (see above).
With thanks to our local AES President, Tim Pratt, internal polarity re-
versing jumpers are now provided on each REAMP output (see Jumper
Map for detail.) The recording engineer may encounter a situation where
reversing relative polarity of a REAMP output will give improved artistic
results. Note that the relative polarity of other TWIN DIRECT outputs re-
main unchanged, and may be used simultaneously with REAMP outputs
to achieve a wide range of unique “mixed tonality” effects. Hey, experi-
ment and be daring — you might just find a sound with “hit” written all over
it.
Millennia is also indebted to Professor Steve Errede at the University of
Illinois (Urbana) for his brilliant research into the electro-physics of guitar
pickups. We’re constantly looking for ways to improve our products. If
there is an instrument pickup you would like Millennia to emulate, contact
us.
HEADPHONE OUTPUT “PHONES”
Conventional 1/4” phone jack providing monophonic headphone out-
put. Output level is adjustable via an inset “PHONES LEVEL” trimmer
potentiometer (below). Tip and Ring are signal positive polarity, Sleeve is
ground. Headphone output has been optimized for use with Sennheiser
model HD-600, though any professional headphone will work great.
HEADPHONE OUTPUT LEVEL “PHONES LEVEL”
Twenty-turn trimmer potentiometer which controls the Headphone Ampli-
fier Output level. To make a level adjustment, use only an insulated
“trimpot wand” designed specifically for trimpot adjustment. Use of a
non-insulated screwdriver could damage your TD-1.
EARTH GROUND LIFT “EARTH LIFT” Pushbutton Switch
A switch through which Earth ground is connected to internal power
and audio ground. Depressing and illuminating this switch will lift Earth
ground from internal audio and power ground paths, and may cure a
ground “hum” problem. When using this switch, the integrity of the Earth-
to-Chassis ground bond is never compromised. Do not lift or defeat the
Earth grounding pin on the AC power plug or receptacle.
AC VOLTAGE MAINS SELECTION “100-120” or “200-240”
A power entry module with removable fuse holder block. This fuse holder
block is selectable for 100 - 120 Volt or 200 - 240 Volt worldwide mains
powering. The fuse block contains two fuses — one fuse is in series
with the hot power line while the other fuse is in series with the neutral