Technics QUARTZ SA-R177 User Manual

SA-R177
M@ PROTECTION CIRCUITRY
The protection circuitry may have operated if either
of the following conditions is noticed:
e 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.
Mi BEFORE REPAIR
If this occurs, follow the procedure outlines below:
1. Turn off the power.
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.
(1) Turn off the power supply. Using a 10Q, 5W resistor connect both ends of power supply capacitors (C701,
C702, 4700uF) in order to discharge the voitage.
(2) Before turning the power supply on, after completion of repair, slowly apply the primary voltage by using a
power supply voltage controller to make sure that the consumed current at 50Hz/60Hz in NO SIGNAL mode
should be shown below with respect to supply voltage 110V/127 V/220V/240V.
Power supply voltage AC110V AC127V AC220V AC240V
Consumed current 50/60Hz | 170~470mA_ | 150 ~450mA 60 ~260mA 50 ~ 250mA
Mi
MEASUREMENTS
AND
ADJUSTMENTS
Note:
For
Z202
(AM-IFT),
and
Z201(AM
ANT
and
OSC
coil),
they
are
supplied
as
adjusted
parts.
So,
do
not
turn
the
cores
of
the
parts.
It is not necessary to adjust the AM circuit.
e ADJUSTMENT POINTS
FM MONO
DISTORTION
coil
— 10 —
VR301
FM MPX VCO Adj.

Technics QUARTZ SA-R177 Specifications

General

Brand	Technics
Model	QUARTZ SA-R177
Category	Stereo Receiver
Language	English