Kurzweil K250 - Page 10

SYNC OUT - The Sync Out is a TTL-level square wave. output
used to drive other instruments
in synchrony with the Kurzweil
250. The repetition rate is
normally X12 to X96 the tempo. The
driving source is a low power
r TTL gate through a 51 ohm
resistor. This
I/O port takes a 1/4 inch phone jack.
MIDI IN - This is a 31.2K baud, 5 milliamp serial input.
MIDI THRU - This is a 31.2K baud, 5 milliamp serial output.
MIDI OUT - This is a 31.2K baud, 5 milliamp serial output, the
same
as MIDI IN buffered.
LO - These are 2 VPP audio outputs, with a 600 ohm driving
source impedance. These require
1/4 inch phone jacks and are
suitable for line level inputs.
ill - These are 20 VPP audio outputs, with a 600 ohm driving
source impedance. These require
1/4 inch phone jacks and are
suitable for directly driving power amplifiers and other high
level
inputs.
BALANCED - These are 20 VPP audio outputs. They have XLR
connectors, floating outputs and a 600 ohm driving source
impedance.
EXTERNAL PEDALS 1
& 2 - The 1/4 inch phone jacks accept
assignable pedal functions (K250 and K250X only).
M.lQ. - This digitizer input is a 200 mVPP full scale input. It
has a 47K ohm input impedance and accepts a 1/4 inch phone
jack.
LINE IN - This digitizer input is a 1 VPP full scale input (300
MV rms.) It has a 10K ohm input impedance and accepts a 1/4
inch phone jack.
Kurzweil 250 Service Manual, Chapter 1
1 - 8