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Technics SX-K350 - Page 19

Technics SX-K350
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DISASSEMBLY
INSTRUCTIONS
MEASUREMENTS
AND
ADJUSTMENTS
1.
How
to
remove
the
cabinet
a)
Remove
the
16
setscrews
@
and6
setscrews
®
on
the
bottom
board.
b)
Lift
the
bottom
board
and
open
it
to
the
back
of
the
cabinet.
ADJUSTMENT
CIRCUIT
BOARD
CONNECT
METER
TO
METER
READING
ADJUSTMENT
SETTING
METER
USED
Poly
presets
Frequency
Main
P.C.B.
Check
point
440+1Hz
Keyboard
counter
®
Oscilloscope,
|
Effector
P.C.B.
Check
point
Oscillator
®
BBD
bias
2.
How
to
remove
the
keyboard
1.
Connect
the
oscilloscope
to
check
point
@
of
the
effector
circuit.
2.
Disconnect
the
lead
terminal
of
C33
(0.047)
connect
to
No.
9
pin
of
1C5,
and
input
1kHz
sine
wave
there.
a)
Open
the
cabinet
according
to
step
1.
b)
Remove
the
8
setscrews
@
which
fasten
the
keyboard
chassis.
c)
Then
the
keyboard
can
be
removed.
clipped.
and
bottom.
EFFECTOR
P.C.B.
Oscillator
1kH
SINE
WAVE
Then,
adjust
the
output
level
of
oscillator
until
the
output
waveforms
of
check
point
12)
is
.
Adjust
VR1
so
that
the
output
waveforms
on
the
oscilloscope
are
evenly
clipped
at
peak
KEYBOARD
RANGES
3.
How
to
remove
the
printed
circuit
boards
*
Open
the
cabinet
and
pull
out
the
connector
of
printed
circuit
boards.
@
Manual
keyboard
1
(MKB
1)
P.C.B.
@
Cymbal
P.C.B.
*Remove
the
10
setscrews
@®
on
the
manual
keyboard
1
P.C.B.
Manual
keyboard
3
(MKB3)
P.C.B.
eRemove
the
6
setscrews
@
on
the
manual
keyboard
3
P.C.B.
Control
panel
(CP)
P.C.B.
Remove
the
10
setscrews
@
on
the
control
panel
P.C.B.
Control
panel
2
(CP2)
P.C.B
*Remove
the
4
setscrews
©
on
the
control
panel
2
P.C.B.
Memory
pack
control
(MPC)
P.C.B.
eRemove
the
2
setscrews
@
on
the
memory
pack
control
P.C.B.
@
Jack
P.C.B.
e
Release
the
3
claws
@
of
P.C.B.
holder
to
remove
the
jack
P.C.B.
Release
the
4
claws
©
of
P.C.B.
holder
to
remove
the
cymbal
P.C.B.
Effector
(EFF)
P.C.B.
Release
the
5
claws
@
of
P.C.B.
holder
to
remove
the
effector
P.C.B.
Main
P.C.B.
eRemove
the
3
setscrews
@
which
fasten
the
main
P.C.B.
.
eRelease
the
5claws
@
of
P.C.B.
holder
to
remove
the
main
P.C.B.
Power
supply
(PS)
P.C.B.
Remove
the
2
setscrews
@
on the
back
of
the
lower
cabinet.
Release
the
3
claws
©
of
P.C.B.
holder
to
remove
the
power
supply
P.C.B.
@
Solo
presets
(SPS)
P.C.B.
Release
the
5
claws
@
of
P.C.B.
holder
to
remove
the
solo
presets
P.C.B.
ct
|
oi]
€1]
F1]
G1]
ai]
B1|c2
|
2]
e2]
F2|c2|
a2|e2|c3]o3|e3
|r3]ea]as|e3|c4|o4|es
Normal
Mode
-
-
I
Split
Accomp
—-
(Initial
mode)
F4|64]aa|Ba]cs
[os
E5|F5
G5
AS
B5|
C6
Keys
for
accompaniment»
Keys
for
melody
(Initial
mode)

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