Korg X3 User Manual

TGL check points
I. Voltage check of
power
supply
Check that a
voltage of +5V (±5Si!) is input at the VDD pin.
4.75V ^ VDD ^ 5.25V
2.
Check of
input/output pins, regardless of the CPU
interface setting
PiN NAME
FUNCTION
BCKO
2.0 MHz bit clock
signal outputs to the D/A
converter.
LRCKO
31.25 KHz L/R clock
signal
output
to the D/A
converter.
If the
voltage
level of these pins is +ZS or
less, check the
soldering
of
peripheral pins and
the voitage
of
the connected device.
Also, if
any of
these pins is OV or +5V,
check to see whether
RESET(TGRES)
or the
master cIock(32.0MHz)
has been input. If
RESET and
HCK are normal
and
the test node setting
pins have
been set as
below,
check the
soldering
and the pattern on
the circuit board.
3.
Check of
input/output pins, when the key on
PIN
NAME
FUNCTION
XCS, XfE
Control signal
from the CPU
During KEY ON
or
PROG. CHANGE, check
that a
low level pulse
signal is
input froB the
CPU to the above
pins(XSC,
XWE). If these
signals
cannot
be observed
with the
oscilloscope,
check the CPU
and its
peripheral
circuits.
PIN NAME
FUNCTION
SDOO, SDOl
serial data output
to the
D/A converter
In
case of
observing the
wavefon with
the
oscilloscope, it
is best to
input the LRCKO
clock signal
to the
external
trigger input of
the
oscilloscope. If the
serial data
cannot
be output,
check the PCM
address
bus. To find
whether nonal
serial data is output
or not,
check whether
there is a
different bit
from the
code bit at
the left
side
of the leading
and the
trailing edge
of
LRCKO on the
oscilloscope
screen.
LRCKO
SDO
I I I I I i [ I I I I m
**
—sign
—
M
S
B
swing
level
L
$
B
34

Korg X3 Specifications

General

Polyphony	32 voices
Multitimbral	16 parts
Presets	200 programs, 200 combinations
User Patches	100 programs, 100 combinations
MIDI	In, Out, Thru
Weight	10.5 kg
Type	Workstation
Keyboard	61 keys
Sequencer	16-track
Display	LCD
Outputs	Stereo
Memory	Internal