Technics SL-QX300

(TaD) is the standard mark for the ‘’P-mount” plug-in connector
system. Products carrying this mark are inter-changeable and compatible
with each other.
Specifications
@ General
Power supply:
Power consumption:
Dimensions:
(WXHXD)
Weight:
Turntable section
Type:
Features:
Drive method:
Motor:
Drive control method:
Turntable platter:
Turntable speeds:
ORDER NO. DPD83060003C8
Service
Manual
Turntable System
SL-QX300Kk)
[E], [EK], [XL], [EG], [EB],
[EH], [EF], [Ei], [EC], [XA], [XM]
Areas
* [E] is available in Switzerland and Scandinavia.
* [EK] is available in United Kingdom.
* [XL] is available in Australia.
* [EG] is available in F.R. Germany.
* [EB] is available in Belgium.
* [EH] is available in Holland.
* [EF] is available in France.
* [Ei] is available in Italy.
* [EC] is available in Czechoslovakia.
* [XA] is available in Southeast Asia, Oceania, Africa,
Middle Near East and Central South America.
[XM] is available in Central South America.
Z#
*The colors of this model include silver and black.
*The black type model is provided with (K) in the
Service Manual.
Specifications are subject to change without notice for further improvement.
Weight and dimensions shown are approximate.
For United Kingdom and
Australia: 240V, AC 50Hz
For Continental Europe: 220V,
AC 50Hz
For Others: 110—120/220—240V,
50/60 Hz
7W
43 X 10 X 38 cm
43 X 36 X 42 cm
(Maximum height when top
(dust cover) is open.)
6kg
Quartz direct drive
Fully automatic turntable
Auto start/Auto lead-in
Auto return, Auto stop
Auto size select
Record presence detection
Repeat play, Manual play
Direct drive
Brushless DC motor
Quartz-phase-locked control
Aluminum die-cast
Diameter 31.2 cm (12-9/32"
inches)
33-1/3 rpm and 45 rpm
Technics
Pitch control:
Wow and flutter:
+6% adjustment range
0.012% WRMS*
0.025% WRMS (JIS C5521)
+0.035% peak (IEC 98A Weighted)
* This rating refers to turntable assembly alone, excluding
effects of record, cartridge or tonearm, but including
platter. Measured by obtaining signal from built-in
frequency generator of motor assembly.
Rumble: —56 dB (IEC 98A Unweighted)
—80 dB (IEC 98A Weighted)
Tonearm section
Type: Statically-balanced straight
tonearm
Plug-in connector cartridge
system
230 cm (9-1/16")
15 mm (19/32")
Within 2°32’ at the outer groove
of 30 cm (12”) record
Within 0°32’ at the inner groove
of 30.cm (12") record
Less than 7 mg (lateral, vertical)
7.5 g (without cartridge)
Effective length:
Overhang:
Tracking error angle:
Friction:
Effective mass:
Stylus pressure
adjustment range:
Applicable cartridge
weight range: 6g
Phono cable
capacitance:
1.25 +0.25 g
Matsushita Electric Trading Co., Ltd.
P.O. Box 288, Central Osaka Japan

Technics SL-QX300 Specifications

General

Brand	Technics
Model	SL-QX300
Category	Turntable
Language	English

Summary

Specifications

General

Details power supply, consumption, dimensions, and weight of the turntable.

Turntable Section

Specifications for the turntable drive, motor, platter, and speeds.

Tonearm Section

Details tonearm type, length, tracking error, and cartridge compatibility.

Safety Precaution

Insulation Resistance Test

Procedure for testing insulation resistance to prevent electric shock hazards.

Location of Controls

Disassembly Instructions

How to Remove the Cartridge

Step-by-step guide for safely removing the turntable cartridge.

How to Remove the Cabinet and Bottom Board

Instructions for disassembling the main unit's cabinet and bottom board.

How to Remove the Drive Circuit P.C.B. and Stator Frame

Procedure for detaching the drive circuit board and stator frame assembly.

How to Remove the Automatic Mechanism Plate Assy

Steps to remove the automatic mechanism plate assembly.

How to Remove the Control Circuit P.C.B.

Procedure for removing the power source and pitch control circuit board.

How to Remove the Tonearm

Instructions for detaching the tonearm assembly from the turntable.

How to Remove the StartStop Switch P.C.B.

Procedure for removing the start/stop switch printed circuit board.

How to Remove the OnOff Switch

Steps to detach the main power on/off switch.

How to Remove the Hall Element

Instructions for removing the Hall element sensor.

Measurements and Adjustment

Arm-Lift Height Adjustment

Adjusting the tonearm lift height for proper stylus-to-record clearance.

Adjustment of Automatic Start Position

Calibrating the tonearm's starting point on the record.

Adjustment of Automatic Return Position

Setting the tonearm's return point after playback.

Speed Adjustment (Pitch Control)

Fine-tuning the turntable's rotation speed (pitch).

Pitch Control Adjustment (Reference Frequency)

Adjusting pitch control using a reference frequency and oscilloscope.

Trouble Shooting

Conditions of the Set

Steps to check specific parts when the unit malfunctions in different modes.

Schematic Diagram

Circuit Board and Wiring Connection Diagram

Replacement Parts List (Electrical Parts)

Exploded Views

Cabinet and Chassis Parts

Diagram showing breakdown of cabinet and chassis components with part numbers.

Automatic Mechanism Plate Parts

Diagram showing breakdown of automatic mechanism plate parts.

Location of Automatic Mechanism Plate

Diagram illustrating the layout of automatic mechanism plate components.

Replacement Parts List (Mechanical Parts)

Packing