Read Panasonic SA-AK350E / SA-AK350EB / SA-AK350EG Service Manual online
RMS output power
THD 10%, both channels driven
1 kHz
(Low channel)
75 W per channel (3
Ω)
10 kHz
(High channel)
75 W per channel (3
Ω)
Total Bi-Amp power
300 W
n FM/AM TUNER, TERMINALS SECTION
Preset station
FM 20 stations
AM 15 stations
Frequency Modulation (FM)
Frequency range
87.5 to 108.0 MHz (50 kHz steps)
Sensitivity
4.0 µV (IHF)
S/N 26 dB
2.2 µV
Antenna terminal(s)
75
Ω (unbalanced)
Amplitude Modulation (AM)
Frequency range
522 to 1629 kHz (9 kHz step)
Sensitivity
S/N 20 dB (at 999 kHz)
560 µV/m
Music Port input jack
Terminal
Stereo, 3.5 mm jack
Sensitivity
100 mV, 4.7 k
Ω
Phone jack
Terminal
Stereo, 3.5 mm jack
2007 Co. .
SA-AK350E
SA-AK350EB
SA-AK350EG
SA-AK350EB
SA-AK350EG
Colour
(S)... Silver Type
(S)... Silver Type
n CASSETTE DECK SECTION
Track system
4 track, 2 channel
Heads
Record/playback
Solid permoy head
Erasure
Double gap ferrite head
Motor
DC servo motor
Recording system
AC bias 100 kHz
Erare system
AC erase 100 kHz
Tape speed
4.8 cm/s
Over frequency response (+3, -6 dB) at DECK OUT
NORMAL
35 Hz to 14 kHz
S/N Ratio
50 dB (A weighted)
Wow and flutter
0.18 % (WRMS)
Fast forward and rewind time
Approx. 120 seconds with
C-60 cassette tape
n DISC SECTION
Disc played [8 cm or 12 cm]
(1) CD-Audio (CD-DA)
(2) CD-R/RW (CD-DA, MP3* formatted disc)
(3) MP3*
*MPEG-1 Layer 3, MPEG-2 Layer 3
Bit rate
MP3
32 kbps to 320 kbps
CD Stereo System
Notes: This model’s CD mechanism changer unit is CRS1. Please refer to the original Service Manual
(Order No. MD0509368C0) for this mechanism.
(Order No. MD0509368C0) for this mechanism.
Specifications
ORDER NO. MD0704048CE
Sampling frequency
MP3
32 kHz, 44.1 kHz, 48 kHz
CD-DA
44.1 kHz
Decoding
16 bit linear
Digital filter
8 fs
D/A converter
MASH (1 bit DAC)
Pick up
Wavelength
780 nm
Beam Source
Semiconductor laser
Audio output (Disc)
Number of channels
2 (Stereo) (FL, FR)
n GENERAL
Power supply
(For E/ EG only)
AC 230 V, 50Hz
(For EB only)
AC 230 to 240 V, 50Hz
Power consumption
90 W
Power consumption in standby
mode
mode
0.5 W
1 Safety Precautions
4
1.1.
General Guidelines
4
1.2.
Caution for AC Mains Lead
5
1.3.
Before repair and adjustment
5
1.4.
Protection Circuitry
6
1.5.
Safety Part Information
6
2 Prevention of Electro Static Discharge (ESD) to
Electrostatically Sensitive (ES) Devices
6
3 Handling Precautions For Traverse Deck
8
4 Precaution of Laser Diode
10
5 About Lead Free Solder (PbF)
11
5.1.
Service caution based on legal restrictions
11
6 Accessories
12
7 Operating Procedures
13
7.1.
Main Unit Key Buttons Operations
13
7.2.
Remote Control Key Buttons Operations
13
8 New Features
14
8.1.
Using the Music Port
14
9 Self diagnosis and special mode setting
15
9.1.
Service Mode Summary Table
15
9.2.
Special Mode Table 1
15
9.3.
Reliability Test Mode (CRS1 Mechanism)
18
9.4.
Error code Table Display
20
10 Assembling and Disassembling
25
10.1. Caution
25
10.2. Disassembly flow chart
26
10.3. Main Parts Location
27
Dimensions (W x H x D)
250 x 330 x 323 mm
Mass
7.1 kg
Operating temperature range
+5 to +35°C
Operating humidity range
5 to 90% RH (no condensation)
n SYSTEM
SC-AK350 (E)
Music center: SA-AK350 (E)
Speaker: SB-AK350 (EG)
SC-AK350 (EB)
Music center: SA-AK350 (EB)
Speaker: SB-AK350 (EG)
SC-AK350 (EG)
Music center: SA-AK350 (EG)
Speaker: SB-AK350 (EG)
For Information on speaker system, plesae refer to the original
Service Manual (Order No. MD0704049CE) for SB-AK350EG-S.
Service Manual (Order No. MD0704049CE) for SB-AK350EG-S.
Notes:
1.
Specifications are subject to change without notice. Mass and
dimensions are approximate.
dimensions are approximate.
2.
Total harmonic distortion is measured by the digital spectrum
analyzer.
analyzer.
10.4. Disassembly of Top Cabinet
28
10.5. Disassembly of CD Changer Unit (CRS1)
28
10.6. Disassembly of Rear Panel
29
10.7. Disassembly of Main P.C.B.
30
10.8. Disassembly of Transformer P.C.B.
30
10.9. Disassembly of Power P.C.B.
31
10.10. Disassembly of Front Panel Unit
32
10.11. Disassembly for Panel P.C.B.
33
10.12. Disassembly of Tact Switch P.C.B.
33
10.13. Disassembly of Deck mechanism unit
34
10.14. Disassembly of Deck P.C.B.
34
10.15. Disassembly of Traverse Unit
34
10.16. Disassembly for Deck Mechanism
36
10.17. Disassembly of Deck Mechanism P.C.B.
38
10.18. Disassembly of cassette lid
39
10.19. Rectification for tape jam problem
39
11 Service Fixture and Tools
41
12 Service Positions
41
12.1. Checking and Repairing of Main P.C.B.
41
12.2. Checking and Repairing of Transformer P.C.B.
42
12.3. Checking and Repairing of Panel, Deck & Deck
Mechanism P.C.B.
42
12.4. Checking and Repairing of Power P.C.B.
43
13 Procedure for Checking Operation of Individual Parts of Deck
Mechanism Unit
44
13.1. Operation Check with Cassette Tape
44
13.2. Operation Check without Cassette Tape
44
CONTENTS
Page
Page
2
SA-AK350E / SA-AK350EB / SA-AK350EG
14 Measurement And Adjustments
46
14.1. Cassette Deck Section
46
15 Voltage and Waveform Chart
48
15.1. CD Servo P.C.B.
48
15.2. Deck P.C.B. & Deck Mechanism P.C.B.
48
15.3. Main P.C.B.
49
15.4. Panel P.C.B.
49
15.5. Power P.C.B. & Transformer P.C.B.
50
15.6. Waveform Chart
51
16 Wiring Connection Diagram
52
17 Block Diagram
53
17.1. CD Servo Diagram
53
17.2. Deck/ Deck Mechanism Diagram
54
17.3. Main Diagram
55
17.4. Panel Diagram
57
17.5. Power Diagram
58
17.6. Transformer Diagram
59
18 Notes Of Schematic Diagram
61
19 Schematic Diagram
63
19.1. (A) CD Servo Circuit
63
19.2. (B) Main Circuit
64
19.3. (C) Panel Circuit
68
19.4. (D) Sub Panel Circuit & (G) Deck Mechanism Circuit
69
19.5. (E) Power Circuit
70
19.6. (F) Deck Circuit
72
19.7. (H) Transformer Circuit
73
20 Printed Circuit Board
75
20.1. (A) CD Servo P.C.B., (F) Deck P.C.B. & (G) Deck
Mechanism P.C.B.
76
20.2. (B) Main P.C.B.
77
20.3. (C) Panel P.C.B.
78
20.4. (D) Sub Panel P.C.B.
79
20.5. (E) Power P.C.B.
80
20.6. (H) Transformer P.C.B.
81
21 Illustration of ICs, Transistors and Diodes
83
22 Terminal Function of IC's
84
22.1. IC7001 (MN6627954MA) Servo Processor,Digital Signal
Processor/Digital filter and D/A Converter
84
22.2. IC7002 (BA5948FPE2) IC 4CH Drive
85
22.3. IC2801 (C2CBYY000482) System Microprocessor
85
23 Exploded Views
87
23.1. Cabinet Parts Location
87
23.2. Deck Mechanism Parts Location (RAA4403-S)
89
23.3. Packaging
90
24 Replacement Parts List
91
3
SA-AK350E / SA-AK350EB / SA-AK350EG
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 and 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
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 5.2MΩ.
When the exposed metal does not have a return path to the chassis, the reading must be
.
1.1.2. Leakage Current Hot Check (See Figure 1)
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 capacitor, 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 out of the limits
specified, there is a possibility of a shock hazard, and the equipment should be repaired and rechecked before it is returned to
the customer.
specified, there is a possibility of a shock hazard, and the equipment should be repaired and rechecked before it is returned to
the customer.
Fig. 1
4
SA-AK350E / SA-AK350EB / SA-AK350EG