Technics QUARTZ SA-160

SA-160 SA-160
Ref.No. | How to remove the tuner P.C.B. Ref. No. Ref.No. | How toremove the volume control P.C.B. | Ref. No. ;
and main P.C.B. How toremove the power tc. and balance control P.C.B. 8 How to remove the key switch P.C.B.
Procedure
Procedure
Procedure
Procedure
1.
Remove
the
12
screws
(9~@®).
1.
Unsolder
the
power
IC.
¢
How
to
remove
the
volume
control
P.C.B.
1.
Remove
the
2
screws
(@,
@)
and
remove
the
2.
Remove
the
tuner
P.C.B.
and
main
P.C.B.
2.
Remove
the
2
screws
(@,
@).
1.
Remove
the
volume
control
knob.
P.C.B.
holder.
2.
Remove
the
nut.
2.
Remove
the
2
screws
(@,
©).
3. Release the Tabs.
¢ How to remove the balance control P.C.B.
1. Remove the balance control knob.
2. Remove the 2 screws (@, @).
Volume
control P.C.B.
Unsolder the
power IC
Balance control
holder
Note:
When
mounting
the
power
IC,
apply
silicon
terminal
compound
(SZZOL15)
to
the
rear
of
the
power
IC.
Balance
Volume
control
knob
control
knob
How to check the main P.C.B.
1. Remove the 4 screws (@~®) in above figure.
2. Remove the 9 screws (@~@).
3. Remove the bottom chassis in the direction of
the arrow (Q).
Mi PROTECTION CIRCUITRY
The protection circuitry may have operated if either
of the following conditions is noticed:
If this occurs, follow the procedure outlines below:
1. Turn off the power.
¢ No sound is heard when the power is turned on.
e Sound stops during a performance.
The function of this circuitry is to prevent circuitry
damage if, for example, the positive and negative
speaker connection wires are “shorted”, or if
speaker systems with an impedance less than the
indicated rated impedance of the amplifier are used.
2. Determine the cause of the problem and correct
it.
3. Turn on the power once again after one minute.
Note:
When the protection circuitry functions, the unit will
not operate unless the power is first turned off and
then on again.
M@ BEFORE REPAIR AND ADJUSTMENT
1.
Turn
off
the
power,
discharge
both
power
supply
2.
After
completion
of
repair,
slowly
apply
the
primary
capacitors
(C701,
C702 4700yF)
through
a
109
5W
voltage
by
using
a
variac
to
avoid over
current.
resistor
to
ground.
Do
not
short
between
C701
and
Current
consumption
at
50Hz/60Hz
in
no
signal
C702.
It
may
damage
the
capacitors.
mode
should
by
shown
with
respect
to
supply
voltage 220V/240V.
Power supply voltage
Bottom chassis
50/60 Hz 120~320mA | 100~300mA