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Technics SL-QX300 Service Manual page 2

Turntable system

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@ Cartridge section
Type:
Moving magnet stereo cartridge
Channel separation:
22 dB at 1 kHz
Magnetic circuit:
All laminated core
Channel balance:
Within 1.8dB at 1kHz
Frequency response:
10 Hz~50kHz
Recommended
load
20 Hz~10 kHz +1 dB
impedance:
47 kQ~100 kQ
Output voltage:
2.5 mV at 1 KHz 5 cm/s. zero to
Compliance (dynamic):
12
10-§cm/dyne at 100 Hz
peak lateral velocity
Stylus pressurerange:
1.25+0.25g(12.5+2.5mN)
(7 mV at 1 kHz, 10 cm/s. zero to
Weight:
6 g (cartridge only)
peak 45° velocity [DIN 45 500])
Replacement stylus:
EPS-P33ES
@
The power supply fot this unit varies depending upon the areas.
Also, the parts used for power supply are different.
So,
refer to the circuit diagram and the replacement parts list.
*
[EK], [XA] and [XM] areas are provided with voltage selector.
m@ CONTENTS
Page
Page
SAFETY PRECAUTION...
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REPLACEMENT
PARTS LIST
LOCATION OF CONTROLS.............20
000 eee 3
Electrical parts:
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DISASSEMBLY
INSTRUCTIONS
................
4~6
Mechanical parts...
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apse bo a 21
MEASUREMENTS AND ADJUSTMENT
...............
7
BLOCK DIAGRAM).
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TROUBLE
SHOOTING.............002-02000 8~10
EXPLODED
VIEWS
m@ SAFETY PRECAUTION
[2]
ORWN
=
. Before servicing, unplug the power cord to prevent an electric shock.
. When replacing parts, use only manufacturer's recommended components for safety.
Check the condition of the power cord.
Replace if wear or damage is evident.
. After servicing, be sure to restore the lead dress, insulation barriers, insulation papers, shields, etc.
. Before returning the serviced equipment
to the customer,
be sure to make
the following insulation
resistance test to
prevent the customer from being exposed to a shock hazard.
INSULATION
RESISTANCE
TEST
di.
2.
3}
Unplug the power cord and short the two prongs of the plug with a jumper wire.
Turn on the power switch.
4.
Antenna
terminal
Exposed
Exposed
metal
metal
part
part
Ohmmeter
Ohmmeter
(Fig. A)
(Fig. B)
Resistance
= 3M2—5.2MQ
Resistance
= Approx
oo

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