Impotant Service Notes; Specifications - Sharp MD-X60 Service Manual

MD-X60
FOR A COMPLETE DESCRIPTION OF THE OPERATION OF THIS UNIT, PLEASE REFER
TO THE OPERATION MANUAL.
BEFORE RETURNING THE AUDIO PRODUCT
(Fire & Shock Hazard)
Before returning the audio product to the user, perform the following
safety checks.
1. Inspect all lead dress to make certain that leads are not pinched
or that hardware is not lodged between the chassis and other
metal parts in the audio product.
2. Inspect all protective devices such as insulating materials, cabinet,
terminal board, adjustment and compartment covers or shields,
mechanical insulators etc.
3. To be sure that no shock hazard exists, check for leakage current
in the following manner.
* Plug the AC line cord directly into a 120 volt AC outlet.
* Using two clip leads, connect a 1.5k ohm, 10 watt resistor paralleled
by a 0.15µF capacitor in series with all exposed metal cabinet
parts and a known earth ground, such as conduit or electrical
ground connected to earth ground.
* Use a VTVM or VOM with 1000 ohm per volt, or higher, sensitivity
to measure the AC voltage drop across the resistor (See diagram).
* Connect the resistor connection to all exposed metal parts having
a return path to the chassis (antenna, metal cabinet, screw heads,
knobs and control shafts, escutcheon, etc.) and measure the AC
voltage drop across the resistor.
MiniDisc recorder section
Type: MiniDisc recorder
Signal readout: Non-contact, 3-beam semi-conductor laser
pickup
Audio channel: Stereo; 2 channels
Monaural; 1 channel (long-time recording
mode)
Frequency response: 20 - 20,000 Hz
Rotation speed: 400 - 900 rpm CLV, Approx
Quantization: 16-bit linear
Filter: 8-times oversampling digital filter
Error correction: ACIRC (Advanced Cross Interleave Reed-
Solomon Code)
Coding: ATRAC (Adaptive TRansform Acoustic
Coding)
Recording method: Magnetic modulation overwrite method
D/A converter: 1-bit D/A converter
Sampling frequency: 44.1 kHz
Wow and flutter: Unmeasurable
(less than 0.001% W. peak)
Signal/noise ratio: 95 dB (1 kHz)
Dynamic range: 90 dB (1 kHz)
Compact disc player section
Type: 3-disc multi-play compact disc player
Signal readout: Non-contact, 3-beam semi-conductor laser
pickup
Rotation speed: 200 - 500 rpm CLV, Approx.
Error correction: CIRC (Cross Interleave Reed-Solomon
Code)
Quantization: 16-bit linear
D/A converter: 1-bit D/A converter
Filter: 8-times oversampling digital filter
Frequency response: 20 - 20,000 Hz
Signal/noise ratio: 95 dB (1 kHz)
Dynamic range: 90 dB (1 kHz)
Wow and flutter: Unmeasurable
(less than 0.001% W. peak)
Tuner section
Frequency range: FM; 87.5 - 108 MHz
AM; 530 - 1,720 kHz
FM; 2.5 µV (75 ohms unbalanced)
Sensitivity:
AM; 650 µV/m
IMPORTANT SERVICE NOTES

SPECIFICATIONS

Type:
Frequency response:
Motor:
Signal/noise ratio:
Bias and erasure
system:
Tape speed:
Wow and flutter:
Heads:
Power source:
Power consumption:
Output power:
Input terminals:
Output terminals:
Dimensions:
Weight:
Type:
Maximum input power: 100 W
Rated input power:
Impedance:
Dimensions:
Weight:
– 2 –
VTVM
AC SCALE
1.5k ohms
10W
0.15 µ F
TEST PROBE
TO EXPOSED
METAL PARTS
All check must be repeated with the AC line cord plug connection
reversed.
Any reading of 0.3 volt RMS (this corresponds to 0.2 milliamp. AC.)
or more is excessive and indicates a potential shock hazard which
must be corrected before returning the audio product to the owner.
Cassette deck section
Compact cassette tape
50 - 14,000 Hz (Normal tape)
50 - 15,000 Hz (CrO
DC motor with electronic governor × 1
50 dB (Recording/Playback, Dolby NR off)
Dolby NR effect; 10 dB
(at over 5 kHz)
AC
1-7/8 ips. (4.76 cm/sec.)
0.15 % (WRMS)
Record/playback × 1
Erase × 1
General
AC 120 V, 60 Hz
101 W
40 watts per channel minimum RMS into 6
ohms from 60 Hz to 20 kHz with no more
than 10 % total harmonic distortion
MD IN/AUX (Analog-1); 500 mV/47 kohms
Auxiliary (Analog-2); 500 mV/47 kohms
Auxiliary (Digital); optical
Auxiliary; 2.0 V/1 kohm
Headphones; 16 - 50 ohms
(recommended; 32 ohms)
Speakers; 6 ohms
Width; 9-1/2" (240 mm)
Height; 13-1/8" (332 mm)
Depth; 12-13/16" (325 mm)
19.0 lbs. (8.6 kg)
Speaker section
3-way type [6" (150 mm) woofer, 2-1/2" (65
mm) tweeter and super tweeter]
50 W
6 ohms
Width; 8-1/8" (205 mm)
Height; 13-1/8" (332 mm)
Depth; 12-3/4" (323 mm)
9.3 lbs. (4.2 kg)/each
Specifications for this model are subject to change without
prior notice.
CONNECT TO
KNOWN EARTH
GROUND
tape)
2