Technics SX-PX107 Service Manual

Diagnosis item
Wave ROM check
1. While pressing two E keys simultaneously
power switch.
2. Select the GRAND PIANO sound.
TG | MAINP.C.B.: IC7, Ice
TG P.C.B.: 1C2, IC4
When set to the self-diagnostic mode, the Wave
ROM outputs a sine wave. The Wave ROMs
correspond
to
the
keyboard
keys
as
shown
in
the
I-@:
MAIN-IC9,
IIl-@:
TG-IC4).
diagram to the right. When a key is pressed, the Qi
corresponding sine wave sound is produced. If no rainy
sound is produced, or if the sound is distorted,
the
Wave
ROM
corresponding
to
that
key
is
Pape
I-@jll-2)
1-@) L-OH-OI-D
While pressing two F keys simultaneously,
switch.
defective.
Control panel LED check
switch.
When set to the self-diagnostic mode, the test
confirm that the characters appear correctly.
Examples: 000 + 111 + 222-------------- 888 -+ 999
Keyboard
ROM
(IC2)
check
While
pressing
two
B
keys
simultaneous!
°C
B keys
error beeps will sound.
m™ Connection between serving CHECKING DEVICE and MAIN PCB
SWITCH
CHECKING DEVICE
CIRCUIT
Procedure
eThe key number indicates the Wave FOM
number (I-@: MAIN-IC7, |-@: TGIC2;
While pressing two G keys simultaneously, turn on the power|:
pattern is shown on the display. Monitor the display to
y, turn on the power!
If
the
keyboard
ROM
(IC2)
is
OK,
one
confirming
beep
will
sound.
If
it
is
defective,
several
consecutive

Technics SX-PX107 Specifications

General

Brand	Technics
Model	SX-PX107
Category	Musical Instrument
Language	English