Panasonic SC-EN38E / SC-EN38EB / SC-EN38EG (serv.man2) Service Manual ▷ View online
I AMPLIFIER SECTION
RMS OUTPUT POWER both channel driven simultaneously
10% total harmonic distortion (THD)
1 kHz
3 W per channel (6
Ω)
Input Music Port
Sensitivity
100 mv, 15 k
Ω
Terminal
Stereo, 3.5 mm jack
Output Headphone
Terminal
Stereo, 3.5 mm jack
(16
Ω to 32 Ω)
Option Port
Version 1
I TUNER SECTION
FM
Frequency range
87.50 MHz to 108.00 MHz (50 kHz)
AM
Frequency range
522 kHz to 1629 kHz (9 kHz)
520 kHz to 1630 kHz (10 kHz)
I DISC SECTION
Disc played [8cm or 12cm]
Disc played [8cm or 12cm]
(1) CD-Audio (CD-DA)
(2) CD-R/RW (CD-DA, MP3)
(3) MP3
Sampling frequency
CD
44.1 kHz
SC-EN38E
SC-EN38EB
SC-EN38EG
Colour
(K)... Black Type
(K)... Black Type
MP3
32 kHz, 44.1 kHz, 48 kHz
Bit rate
MP3
32 kbps to 384 kbps
Decoding
16/20/24 bit linear
Pick up
Wavelength
785 nm
Laser power
CLASS 1
Audio Output (Disc)
Number of channels
2 channel
Audio performance
Frequency response (CD-Audio)
20 Hz to 20 kHz
Wow and flutter
Below measurement limit
Digital filter
8
D/A converter
MASH (1 bit DAC)
I USB SECTION
Media file format support
MP3 (*.mp3)
Power consumption in standby mode:
2.6 W (approx.)
I SPEAKER SECTION
Type
1 Way, 1 speaker system
(Bass reflex)
Speaker (s)
Full range Speaker
7 cm cone type
CD Stereo System
Specifications
ORDER NO. MD0803004CE
Impedance
6
Ω
Input power (IEC)
3 W (MAX)
Dimension (W x H x D)
120 mm x 202.8 mm x 133.5 mm
I GENERAL
Power supply
AC 230 V, 50 Hz (E/EG)
AC 230 to 240 V, 50 Hz (EB)
Power consumption
30 W
Dimension (W x H X D)
252.5mm x 202.8mm x 133.5 mm
Mass
With speakers
Approx. 3.20 kg
Without speakers
Approx. 1.90 kg
1
Safety Precautions
3
2
Prevention of Electro Static Discharge (ESD) to
Electrostatically Sensitive (ES) Devices
6
3
Precaution of Laser Diode
7
4
Handling Precautions For Traverse Deck
8
5
Handling the Lead free Solder
9
6
Accessories
10
7
Operation Procedures
11
8
Self diagnosis and special mode setting
15
9
Assembling and Disassembling
20
10 Service Fixture and Tools
47
Operating temperature range
0 °C to +40 °C
Operation humidity range
35% to 80% RH (no condensation)
Notes:
• Specifications are subject to change without notice.
• Total harmonic distortion is measured by the digital spectrum
• Total harmonic distortion is measured by the digital spectrum
analyzer.
I System : SC-EN38E-K
Main Unit: SA-EN38E-K
Speaker: SB-EN38P-K
I System : SC-EN38EB-K
Main Unit: SA-EN38EB-K
Speaker: SB-EN38P-K
I System : SC-EN38EG-K
Main Unit: SA-EN38EG-K
Speaker: SB-EN38P-K
11 Service Position
48
12 Voltage Measurement & Waveform Chart
54
13 Wiring Connection Diagram
59
14 Block Diagram
61
15 Notes Of Schematic Diagram
65
16 Schematic Diagram
67
17 Printed Circuit Board
77
18 Illustration of IC’s, Transistors and Diodes
83
19 Terminal Function of IC’s
84
20 Exploded Views
87
21 Replacement Parts List
91
CONTENTS
Page
Page
2
SC-EN38E / SC-EN38EB / SC-EN38EG
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.
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
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
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
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
3
SC-EN38E / SC-EN38EB / SC-EN38EG
1.2. Caution for AC Cord
4
SC-EN38E / SC-EN38EB / SC-EN38EG
