Manley LANGEVIN ALL-DISCRETE PULTEC EQP1-A TYPE EQUALIZER User Manual

Page 8

REAR PANEL

A B C D E F G H

IEC MAINS SOCKET - Accepts standard 50/60 Hz AC mains voltage. The third pin earth
is tied to chassis in this unit. Inside the unit (if the top is removed) is a switch next to the
power transformer for selecting mains voltage for either 110 or 220 VAC. This is factory set
for your country but if you do a lot of international recording it is nice to know this unit can
go with you.

FUSE HOLDER - To remove the fuse, push and turn the fuse holder cap. Replace only
with a 1 AMP SLO-BLO FUSE.

CIRCUIT, CHASSIS GROUND TERMINALS - Use these terminals to help find and fix
hum problems. These terminals are normally connected together to link circuit and chassis
grounds which ties audio to the mains ground & chassis. Loosen the posts so that the little
metal ground strap can swivel to separate audio from chassis. This is similar to "breaking off
the third pin AC mains ground but includes the chassis (normally grounded by the rack) as
well. You can also connect a wire between the console and either of these posts.

1/4" UNBALANCED OUTPUT - This UNBALANCED output MUST be used with a
MONO 1/4" phone jack wired: TIP = SIGNAL, SLEEVE = GROUND. Do not use a stereo
(tip-ring-sleeve) jack unless the ring is also grounded to the sleeve in the jack.

XLR BALANCED OUTPUT - This is a low impedance balanced output. Pin out is as
follows: PIN 1 - ground, PIN 2- positive going phase (+), PIN 3 - negative going phase (-).
Do not use this output to feed unbalanced inputs or levels will be 6 dB low or worse.

1/4" UNBALANCED INPUT - This UNBALANCED intput can be used with a
MONO 1/4" phone jack wired: TIP = SIGNAL, SLEEVE = GROUND. Use the PHASE
REVERSE switch in the middle position marked "DIR IN" when using this jack so that the
XLR is disconnected The UNBALANCED INPUT is always "on" so connect either the
balanced or unbalanced inputs but not both.

PHASE REVERSE - Switched in the UP position is normal (retains the balanced XLR
input signal in phase with respect to PIN 2 & PIN 3). Switched in the DOWN position will
reverse the phase(polarity) of the balanced XLR input signal. The middle position marked
"DIR IN" disconnects the XLR entirely and is meant to be used with the unbalanced input.

XLR BALANCED INPUT - All- discrete balanced input. Pin out is as follows:
PIN 1 - ground, PIN 2- positive going phase (+), PIN 3 - negative going phase (-).