Panasonic SA-NS55DBEB Service Manual ▷ View online
n Amplifier Section
RMS OUTPUT POWER both channel
driven simultaneously
10 % Total harmonic distortion
15 W per channel (6
Ω)
Input impedance
MUSIC PORT
12 K
Ω
Output impedance
HEADPHONE
16 to 32
Ω
Phone jack
Terminal
Stereo, 3.5 mm
Music Port jack
Terminal
Stereo, 3.5 mm
DAB external antenna
Terminal
F-connector (12
Ω)
Option Port
Version 1
n FM Tuner Section
Frequency range
87.5 to 108.00 MHz (50 kHz step)
Sensitivity
0.10 µV (IHF)
S/N 26 dB
1.20 µV
Antenna terminal(s)
75
Ω (unbalanced)
Preset station
FM 20 stations
n DAB Section
Frequency Band (Wavelength)
Band III (UK only)
11B to 12D (218.640 MHz to
229.072 MHz)
2007 Co. .
SA-NS55DBEB
Colour
(S)... Silver Type
(S)... Silver Type
Band III (Europe)
5A to 13F (174.928 MHz to
239.200 MHz)
LA to LW (1452.960 MHz to
1490.624 MHz)
Intermediate frequency
1st : 38.912 MHz, 2nd : 2.048
MHz
Sensitivity *BER 4x10
-4
MAX. Input Power
0 dBm
Min Requirement
-98 dBm
Selectivity
Adjacent Channel (Band III)
33 dB
Far-Off Channel (Band III)
45 dB
DAB memories
20 channels
n CD Section
Disc played [8 cm or 12 cm]
(1) CD-Audio (CD-DA)
(2) CD-R/RW (CD-DA, MP3)
(3) MP3
Sampling frequency
CD
44.1 kHz
MP3
32 kHz, 44.1 kHz, 48 kHz
Bit rate
MP3
32 kbps to 384 kbps
Decoding
16/20/24 bit linear
Pickup
Wavelength
785 nm
Laser power
CLASS 1
CD Stereo System
Specification
ORDER NO. MD0704043CE
Audio output (Disc)
Number of channels
2 channel
Frequency response
20 Hz to 20 kHz (+1, -2dB)
Wow and flutter
Below measurable limit
Digital filter
8 fs
D/A converter
MASH (1 bit DAC)
n USB Section
Playable USB Storage Media
(1) HDD
(2) USB MP3 player/Digital audio player
(3) USB Thumbdrives
Supported audio file format
MP3
USB memory port
Maximum current
500mA
Bit rate
MP3
32 kbps to 320 kbps
Audio output (MP3)
1 Safety Precautions
4
1.1.
General Guidelines
4
1.2.
Caution for AC Cord
5
1.3.
Before Repair and Adjustment
6
1.4.
Protection Circuitry
6
1.5.
Safety Part Information
6
2 Prevention of Electro Static Discharge (ESD) to
Electrostatically Sensitive (ES) Devices
7
3 Precaution of Laser Diode
8
4 Handling Precautions For Traverse Deck
9
5 Handling the Lead free Solder
10
5.1.
General description about Lead Free Solder (PbF)
10
6 Accessories
11
7 Operation Procedures
12
7.1.
Main Unit Key Buttons Operation
12
7.2.
Remote Control Key Buttons Operation
12
7.3.
Disc Information
13
8 Self diagnosis and special mode setting
14
8.1.
Service Mode Summary Table
14
8.2.
Service Mode Table
14
8.3.
Error Code Table
17
9 Assembling and Disassembling
18
9.1.
Caution
18
9.2.
Disassembly flow chart
19
9.3.
Main Parts Location Diagram
20
9.4.
Disassembly of Top Cabinet Unit
21
Number of channels
2 channel
Frequency response (MP3)
20 kHz to 20 kHz
n General
Power supply
AC 230 to 240V, 50 Hz
Power consumption
60 W
Dimensions (W x H x D)
212 mm x 184 mm x 308 mm
Mass
3.5 kg
Operating temperature range
+5 to +35°C
Operation humidity range
5 to 90% RH (no condensation)
Power consumption in standby
mode
mode
0.7 W (approx.)
Notes :
1. Specifications are subject to change without notices. Mass and
dimensions are approximate.
dimensions are approximate.
2. Total harmonic distortion is measured by the digital spectrum
analyzer.
analyzer.
n System : SC-NS55DBEBS
Music center: SA-NS55DBEBS
Speaker: SB-NS55EG-S
9.5.
Disassembly of D-Port and HP / Music Port P.C.B.
22
9.6.
Disassembly of USB P.C.B.
23
9.7.
Disassembly of DAB Module Unit
24
9.8.
Disassembly of Tuner Pack
25
9.9.
Disassembly of Rear Cabinet Unit
25
9.10. Disassembly of Power and AC Inlet P.C.B.
26
9.11. Disassembly of Transformer P.C.B.
27
9.12. Disassembly of Front Panel
27
9.13. Disassembly of Panel P.C.B.
28
9.14. Disassembly of Main P.C.B.
28
9.15. Disassembly of Switch P.C.B.
29
9.16. Disassembly of Motor P.C.B.
29
9.17. Disassembly of Gear Box
30
9.18. Disassembly of CD Loading Block
31
9.19. Disassembly of CD Mechanism
33
9.20. Disassembly of Traverse Unit, Driving Gear, and Cam
Gear (CD Mechanism Unit)
35
10 Service Positions
40
10.1. Checking and Repairing of HP / Music Port, D-Port and
USB (side B) P.C.B.
40
10.2. Checking and Repairing of Panel P.C.B.
41
10.3. Checking and Repairing of Switch and Motor P.C.B.
42
10.4. Checking and Repairing of DAB Module Unit
43
10.5. Checking and Repairing Transformer P.C.B.
44
10.6. Checking and Repairing Power and AC Inlet P.C.B.
45
10.7. Checking and Repairing Main P.C.B.
46
CONTENTS
Page
Page
2
SA-NS55DBEB
10.8. Checking and Repairing CD Servo P.C.B.
47
11 Voltage Measurement & Waveform Chart
48
11.1. Voltage Measurement
48
11.2. Waveform Chart
53
12 Wiring Connection Diagram
55
13 Block Diagram
57
13.1. CD SERVO/ OPTICAL PICKUP UNIT
57
13.2. MAIN(1/2)/ TUNER EXTENT/DAB EXTENT/ PANEL/ D-
PORT/ MOTOR/ SWITCH
58
13.3. MAIN(2/2)/ USB/ HP/MUSIC PORT/
POWER/TRANSFORMER/ AC INLET
59
13.4. DAB MODULE
60
14 Notes Of Schematic Diagram
61
15 Schematic Diagram
63
15.1. CD SERVO CIRCUIT
63
15.2. DAB MODULE CIRCUIT
64
15.3. MAIN CIRCUIT
65
15.4. PANEL CIRCUIT
68
15.5. DAB EXTENT CIRCUIT / TUNER EXTENT CIRCUIT, HP /
MUSIC PORT CIRCUIT and D-PORT CIRCUIT
69
15.6. USB CIRCUIT
70
15.7. POWER CIRCUIT
71
15.8. MOTOR CIRCUIT and SWITCH CIRCUIT
72
15.9. TRANSFORMER CIRCUIT and AC INLET CIRCUIT
73
16 Printed Circuit Board
75
16.1. CD SERVO P.C.B, DAB MODULE P.C.B, DAB EXTENT
P.C.B and USB P.C.B
75
16.2. TUNER EXTENT P.C.B, MAIN P.C.B, HP/MUSIC PORT
P.C.B and D-PORT P.C.B
76
16.3. PANEL P.C.B, MOTOR P.C.B and SWITCH P.C.B
77
16.4. POWER P.C.B, TRANSFORMER P.C.B and AC INLET
P.C.B
78
17 Illustration of IC's, Transistors and Diodes
79
18 Terminal Function of IC's
80
18.1. IC7001 (MN6627954MA) IC SERVO
PROCESSOR/DIGITAL SIGNAL PROCESSOR/DIGITAL
FILTER D/A CONVERTER
80
18.2. IC7002 (BA5948FPE2) IC 4CH Drive
81
18.3. IC807 (MN101EF16ZXW) MICROPROCESSOR
81
18.4. IC1 (MN66721) DAB BASEBAND PROCESSOR
82
19 Exploded Views
85
19.1. Cabinet Parts Location & Traverse Part Location
85
19.2. Packaging
87
20 Replacement Parts List
89
3
SA-NS55DBEB
1.1.2. Leakage Current Hot Check
1 Safety Precautions
1.1. General Guidelines
1. When servicing, observe the original lead dress. If a short circuit is found, replace all parts which have been overheated or
damaged by the short circuit.
2. After servicing, ensure that all the protective devices such as insulation barriers, insulation papers shields are properly installed.
3. After servicing, check for leakage current checks to prevent from being exposed to shock hazards.
3. After servicing, check for leakage current checks to prevent from being exposed to shock hazards.
1.1.1. Leakage Current Cold Check
1. Unplug the AC cord and connect a jumper between the two prongs on the plug.
2. Using an ohmmeter measure the resistance value, between the jumpered AC plug and each exposed metallic cabinet part on
2. Using an ohmmeter measure the resistance value, between the jumpered AC plug and each exposed metallic cabinet part on
the equipment such as screwheads, connectors, control shafts, etc. When the exposed metallic part has a return path to the
chassis, the reading should be between 1M
chassis, the reading should be between 1M
Ω and 5.2Ω.
When the exposed metal does not have a return path to the chassis, the reading must be
.
1. Plug the AC cord directly into the AC outlet. Do not use an isolation transformer for this check.
2. Connect a 1.5k
2. Connect a 1.5k
Ω, 10 watts resistor, in parallel with a 0.15µF capacitors, between each exposed metallic part on the set and a
good earth ground such as a water pipe, as shown in Figure 1.
3. Use an AC voltmeter, with 1000 ohms/volt or more sensitivity, to measure the potential across the resistor.
4. Check each exposed metallic part, and measure the voltage at each point.
5. Reverse the AC plug in the AC outlet and repeat each of the above measurements.
6. The potential at any point should not exceed 0.75 volts RMS. A leakage current tester (Simpson Model 229 or equivalent) may
4. Check each exposed metallic part, and measure the voltage at each point.
5. Reverse the AC plug in the AC outlet and repeat each of the above measurements.
6. The potential at any point should not exceed 0.75 volts RMS. A leakage current tester (Simpson Model 229 or equivalent) may
be used to make the hot checks, leakage current must not exceed 1/2 milliamp. should the measurement is outside of the limits
specified, there is a possibility of a shock hazard, and the equipment should be repaired and re-checked before it is returned
to the customer.
specified, there is a possibility of a shock hazard, and the equipment should be repaired and re-checked before it is returned
to the customer.
Fig. 1
4
SA-NS55DBEB