Service Manuals, User Guides, Schematic Diagrams or docs for : panasonic Audio SA-DK20GN Panasonic_SA-DK20GN_sm

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ORDER NO. MD0206154C3

DVD Stereo System

SA-DK20GN
Colour
(S)... Silver Type
TAPE SECTION :
AR2 MECHANISM SERIES

SPECIFICATIONS
Specifications

1
AMPLIFIER SECTION
RMS power output
10% THD, both channels driven
75 Hz
Subwoofer 150 W (4 )
1 kHz
Front 45 W per ch (6 )
Center 70 W (8 )
Surround 40 W per ch (8 )
Total power in stereo mode
(Front and Subwoofer) 240 W
Total power in Home Theater mode
390 W
Input sensitivity
AUX 250 mV
Input Impedance
AUX 10 k
FM TUNER SECTION
Frequency range 87.50 - 108.00 MHz (50
kHz steps)
Sensitivity 1.8 V (IHF)
S/N 26 dB 1.5 V
Antenna terminal(s) 75 (unbalanced)
AM TUNER SECTION
Frequency range 522 - 1629 kHz (9 kHz
steps)
Sensitivity
S/N 20 dB (at 999 kHz) 500 V/m
CASSETTE DECK
SECTION
Track system 4 track, 2 channel
Heads
Record/playback Solid permalloy head
Erasure Double gap ferrite head
Motor DC servo motor
Recording system AC bias 100 kHz
Erasing system AC erase 100 kHz
Tape speed 4.8 cm/s (1 7/8 ips)
Overall frequency response (+3 dB, -6 dB at DECK
OUT)
NORMAL (TYPE I) 35 Hz - 14 kHz
HIGH (TYPE II) 35 Hz - 14 kHz
S/N ratio 50 dB (A weighted)

2
Wow and flutter 0.18 % (WRMS)
Fast forward and rewind Approx. 120 seconds with
time
C-60 cassette tape
Disc SECTION
Disc
DVD-Video
8 cm/12 cm single-sided, single-layer
8 cm/12 cm single-sided, double-layer
8 cm/12 cm double-sided, double-layer
(One layer per side)
Video CD/CD 8 cm/12 cm (CD-R/RW)
Video
Signal system NTSC/PAL
(depending on disc
format)
Output level
Composite video 1 Vp-p (75 )
S-Video Y 1 Vp-p (75 )
S-Video C 0.300 Vp-p (75 )(PAL)
0.286 Vp-p (75 )(NTSC)
Audio
Sampling frequency
CD 44.1 kHz
DVD 48kHz/96 kHz
Decoding 16/20/24 bit linear
Wow and flutter Below measurable limit
D/A converter Delta-sigma DAC)
Pick up
Beam source Semiconductor Laser
Wavelength
DVD 658 nm
VCD/CD 790 nm
GENERAL
Power supply AC 230 - 240 V, 50Hz
Power consumption 186 W
Power consumption in standby mode
0.6 W
Dimensions (W x H x D) 215.4 X 315 X 350 mm
Mass 8.1 kg

SYSTEM
SC-DK20(GN) Music Center: SA-
DK20(GN)

3
Front Speaker: SB-
DK20(P)
Surround & Centre Speaker: SB-PT93(P1)
Sub woofer: SB-W20(P)
Notes:
1. Specifications are subject to change without notice. Mass and
dimensions are aproximate.
2. Total harmonic distortion is measured by the digital spectrum analyzer.

1. Before Repair and Adjustment
Disconnect AC power, discharge Power Supply Capacitors C566~C569, C782 and
C591 through a 10 , 5W resistor to ground.
DO NOT SHORT-CIRCUIT DIRECTLY (with a screwdriver blade, for instance), as
this may destroy solid state devices.
After repairs are completed, restore power gradually using a variac, to avoid
overcurrent.
Current consumption at AC 240V, 50Hz in NO SIGNAL mode should be ~350mA
respectively.

2. Protection Circuitry
The protection circuitry may have operated if either of the following conditions
are noticed:
- No sound is heard when the power is turned on.
- 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.
If this occurs, follow the procedure outlines below:

4
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.

3. Accessories
Remote Control Transmitter

FM indoor antenna

5
AC mains lead

AM Loop antenna

Video cable

6
4. Handling Precaution for Traverse Deck (Optical
Pickup)
The laser diode in the traverse unit (optical pickup) may break down due to static
electricity of clothes or human body.
Use due caution to electrostatic breakdown when servicing and handling the
laser diode.

4.1. Grounding for electrostatic breakdown prevention
Some devices such as the DVD player use the optical pickup (laser diode) and
the optical pickup will be damaged by static electricity in the working
environment. Proceed servicing works under the working environment where
grounding works is completed.

4.1.1. Workable grounding

1. Put a conductive materials (sheet) or iron sheet on the area where the optical
pickup is placed, and ground the sheet.

4.1.2. Human body grounding

1. Use the anti-static wrist strap to discharge the static electricity from your body.

7
4.1.3. Handling of optical pickup

1. To keep the good quality of the optical pickup maintenance parts during
transportation and before installatio,. the both ends of the laser diode are
short-circuited. After replacing the parts with new ones, remove the short
circuit according to the correct procedure. (See this Technical Guide.)
2. Do not use a tester to check the laser diode for the optical pickup. Failure to
do so will damage the laser diode due to the power supply in the tester.

4.2. Handling Precautions for Traverse Unit (Optical Pickup)
1. Do not give a considerable shock to the traverse unit (optical pickup) as it has
an extremely high-precise structure.
2. When replacing the optical pickup, install the flexible cable and cut its short
land with a nipper. See the optical pickup replacement procedure in this
Technical Guide. Before replacing the traverse unit, remove the short pin for
preventingstatic electricity and install a new unit. Connect the connector as
short times as possible.
3. The flexible cable may be cut off if an excessive force is applied to it. Use
caution when handling the cable.
4. The half-fixed resistor for laser power adjustment cannot be adjusted. Do not
turn the resistor.

5. Precaution of Laser Diode

8
Caution :
This product utilizes a laser diode with the unit turned "ON", invisible laser
radiation is emitted from the pick up lens.
Wavelength : 780 nm
Maximum output radiation power from pick up : 100 W/VDE
Laser radiation from pick up unit is safety level, but be sure the followings:
1. Do not disassemble the optical pick up unit, since radiation from exposed
laser diode is dangerous.
2. Do not adjust the variable resistor on the pick up unit. It was already adjusted.
3. Do not look at the focus lens using optical instruments.
4. Recommend not to look at pick up lens for a long time.

ACHTUNG :
Dieses Produkt enth

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