Page 1
1-2 (No.MB399)
SPECIFICATION
Designs and Specifications are subject to change without notice. General Power source AC 230 V , 50 Hz
Power consumption 25 W (in operation)
1.0 W (on standby)
Weight 3.0 kg
External dimensions (W × H × D) 150 mm × 152 mm × 246 mm
DVD player Playable discs DVD VIDEO, DVD AUDIO, VCD,
SVCD, CD, CD-R/RW (CD, VCD,
MP3, WMA, JPEG format), DVD-R/-RW (video format)
Video output Color system PAL
Horizontal resolution 500 lines
Composite × 1 1.0 V (p-p)/75 -„¦, synchronization negative
S-video × 1 Y output: 1.0 V (p-p)/75 -„¦, synchronization negative
C output: 0.3 V (p-p)/75 -„¦
Component × 1 Y output: 1.0 V (p-p)/75 -„¦, synchronization negative
PB/PR output: 0.7 V (p-p)/75 -„¦
Audio output Analog sound output Speakers × 2 Output power (IEC 268-3): 36 W (18 W+18 W) at 4 -„¦ (10% THD)
Fitting impedance: 4 -„¦ to 16 -„¦
Headphones × 1 11 mW/32 -„¦
Fitting impedance: 16 -„¦ to 1 k-„¦
Subwoofer × 1 500 mVrms/10 k-„¦
Digital sound output Optical × 1 -21 dBm to -15 dBm
Audio input Sound input AUX × 1
400 mV/50 k-„¦
USB AUDIO × 1
Tuner FM tuner Receiving frequency 87.50 MHz to 108.00 MHz
Antenna 75 -„¦- Unbalanced type
AM (MW) tuner Receiving frequency 522 kHz to 1 629 kHz
Antenna External antenna jack (loop antenna)
Speaker Type Full range
1-way bass-reflex type
Magnetically shielded type
Speaker 8cm cone × 1
Frequency response 55 to 20 000 Hz
Power handling capacity 30 W
Impedance 4-„¦
Sound pressure level 80 dB/W m
Dimension (W × H × D) 120 mm × 151 mm × 241 mm
Weight 1.8 kg each
Page 2
(No.MB399)1-3
SECTION 1
PRECAUTION
1.1 Safety Precautions
(1) This design of this product contains special hardware and
many circuits and components specially for safety purpos-
es. For continued protection, no changes should be made
to the original design unless authorized in writing by the
manufacturer. Replacement parts must be identical to
those used in the original circuits. Services should be per-
formed by qualified personnel only.
(2) Alterations of the design or circuitry of the product should
not be made. Any design alterations of the product should
not be made. Any design alterations or additions will void
the manufacturers warranty and will further relieve the
manufacture of responsibility for personal injury or property
damage resulting therefrom.
(3) Many electrical and mechanical parts in the products have
special safety-related characteristics. These characteris-
tics are often not evident from visual inspection nor can the
protection afforded by them necessarily be obtained by us-
ing replacement components rated for higher voltage, watt-
age, etc. Replacement parts which have these special
safety characteristics are identified in the Parts List of Ser-
vice Manual. Electrical components having such features
are identified by shading on the schematics and by ( ) on
the Parts List in the Service Manual. The use of a substitute
replacement which does not have the same safety charac-
teristics as the recommended replacement parts shown in
the Parts List of Service Manual may create shock, fire, or
other hazards.
(4) The leads in the products are routed and dressed with ties,
clamps, tubings, barriers and the like to be separated from
live parts, high temperature parts, moving parts and/or
sharp edges for the prevention of electric shock and fire
hazard. When service is required, the original lead routing
and dress should be observed, and it should be confirmed
that they have been returned to normal, after reassem-
bling.
(5) Leakage shock hazard testing
After reassembling the product, always perform an isola-
tion check on the exposed metal parts of the product (an-
tenna terminals, knobs, metal cabinet, screw heads,
headphone jack, control shafts, etc.) to be sure the product
is safe to operate without danger of electrical shock.Do not
use a line isolation transformer during this check.
- Plug the AC line cord directly into the AC outlet. Using a
"Leakage Current Tester", measure the leakage current
from each exposed metal parts of the cabinet, particular-
ly any exposed metal part having a return path to the
chassis, to a known good earth ground. Any leakage cur-
rent must not exceed 0.5mA AC (r.m.s.).
- Alternate check method
Plug the AC line cord directly into the AC outlet. Use an
AC voltmeter having, 1,000-„¦ per volt or more sensitivity
in the following manner. Connect a 1,500-„¦ 10W resistor
paralleled by a 0.15µF AC-type capacitor between an ex-
posed metal part and a known good earth ground.
Measure the AC voltage across the resistor with the ACvoltmeter.
Move the resistor connection to each exposed metal
part, particularly any exposed metal part having a return
path to the chassis, and measure the AC voltage across
the resistor. Now, reverse the plug in the AC outlet and
repeat each measurement. Voltage measured any must
not exceed 0.75 V AC (r.m.s.). This corresponds to 0.5
mA AC (r.m.s.).
1.2 Warning
(1) This equipment has been designed and manufactured to
meet international safety standards.
(2) It is the legal responsibility of the repairer to ensure that
these safety standards are maintained.
(3) Repairs must be made in accordance with the relevant
safety standards.
(4) It is essential that safety critical components are replaced
by approved parts.
(5) If mains voltage selector is provided, check setting for local
voltage.
1.3 Caution
Burrs formed during molding may be left over on some parts
of the chassis.
Therefore, pay attention to such burrs in the case of pre-
forming repair of this system.
1.4 Critical parts for safety
In regard with component parts appearing on the silk-screen
printed side (parts side) of the PWB diagrams, the parts that are
printed over with black such as the resistor ( ), diode ( )
and ICP ( ) or identified by the " " mark nearby are critical
for safety. When replacing them, be sure to use the parts of the
same type and rating as specified by the manufacturer.
(This regulation dose not Except the J and C version)
Good earth groundPlace this
probe on
each exposed
metal part. AC VOLTMETER
(Having 1000
ohms/volts,
or more sensitivity)
1500 10W
0.15 F AC TYPE
Page 13
1-14 (No.MB399) 3.1.7 Removing the digital amplifier board assembly
(See Figs.15 and 16)
- Remove the side panels L/R, top panel assembly, rear panel
and switching power supply.
(1) From the top side of the main body, remove the screw Q
attaching the digital amplifier board assembly. (See
Fig.15.)
(2) From the left side of the main body, disconnect the connec-
tors (CN310
, CN311 , CN312 ) on the digital amplifier board
assembly from the regulator board. (See Fig.16.)
(3) Release the joint g of the shield case B in the direction of
the arrow and take out the digital amplifier board assembly
from the main body. (See Fig.16.)
Fig.15
Fig.16
Digital amplifier board assembly
Q
Digital amplifier board assembly
Shield case B
CN312 CN311 CN310
Regulator board
g
