Panasonic SA-PM23P / SA-PM23PC Service Manual ▷ View online
n Amplifier Section
FTC OUTPUT POWER both channel driven simultaneously
10% total harmonic distortion
60 Hz to 20 kHz
18 W per channel (6
Ω)
RMS OUTPUT POWER both channel driven simultaneously
10% total harmonic distortion
1 kHz
20 W per channel (6
Ω)
Input impedance
AUX
250 mV 12 k
Ω
Output impedance
HEADPHONE
16
Ω to 32 Ω
Phone jack
Terminal
Stereo, 3.5 mm
n FM Tuner Section
Frequency range
87.9 MHz to 107.9 MHz
(200 kHz steps)
87.5 MHz to 108.0 MHz
(100 kHz steps)
Sensitivity
1.5 µV (IHF)
S/N 26 dB
1.0 µV
Antenna terminals
75
Ω (unbalanced)
Preset station
FM 15 stations
AM 15 stations
n AM Tuner Section
2006 Co. .
SA-PM23P
SA-PM23PC
SA-PM23PC
Colour
(S)... Silver Type
(S)... Silver Type
Frequency range
520 kHz to 1710 kHz
(10 kHz steps)
Sensitivity
S/N 20 dB (at 1000 kHz)
447 µV/m
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
Erase system
AC erase 100 kHz
Tape speed
4.8 cm/s (1 7/8 ips)
Over frequency response (+3 dB, -6 dB) at DECK OUT
Normal
35 Hz to 14 kHz
S/N RATIO
47 dB (A weighted)
Wow and flutter
0.08% (WRMS)
Fast-forward and rewind time
Approx. 120 seconds with C-60
cassette tape
n CD Section
Disc played [8 cm (3”) or 12 cm (5”)]
(1) CD-Audio (CD-DA)
(2) CD-R/RW (CD-DA, MP3, WMA formatted disc)
(3) MP3/WMA
CD Stereo System
Specification
ORDER NO. MD0512494C1
A6
Sampling frequency
CD
44.1 kHz
MP3/WMA
32 kHz, 44.1 kHz, 48 kHz
Bit rate
MP3/WMA
32 kbps to 384 kbps
Decoding
16/20/24 bit linear
Pick up
Wavelength
785 nm
Beam source
Semiconductor laser
Laser power
CLASS 1
Audio output (Disc)
Number of channels
2-channel
Frequency response
20Hz to 20 kHz (+1dB, -2dB)
Wow and flutter
Below measurable limit
Digital filter
8 fs
D/A converter
MASH (1 bit DAC)
n General
1 Safety Precautions
4
1.1.
General Guidelines
4
1.2.
Before Repair and Adjustment
5
1.3.
Protection Circuitry
5
1.4.
Caution For Fuse Replacement
5
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
5.1.
About lead free solder (PbF)
9
6 Accessories
10
7 Operating Instructions Procedures
11
7.1.
Main Unit & Remote Control Operation
11
7.2.
Disc Information
12
8 Self diagnosis and special mode setting
13
8.1.
Special Mode Table
13
8.2.
Error Code Table
17
9 Assembling and Disassembling
19
9.1.
Caution
19
9.2.
Disassembly Flow Chart
20
9.3.
Main Parts Location Diagram
20
9.4.
Disassembly of Side Panel L & R
21
9.5.
Disassembly of Top Cabinet Unit
21
9.6.
Disassembly of CD Mechanism
22
9.7.
Disassembly of CD Open/Close P.C.B.
22
9.8.
Disassembly of Front Panel
22
Power supply
AC 120 V, 60 Hz
Power consumption
57 W
Dimensions (W x H x D)
165 x 227 x 285 mm
(6 1/2” x 8 15/16” x 11 1/8”)
Mass
3.2 kg (7.1 Ib.)
Operating temperature range
+5°C to +35°C (+41°F to +95°F)
Operation humidity range
5% to 90% RH (no condensation)
Power consumption in standby
mode
mode
0.6 W
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-PM23P-S
Music center: SA-PM23P-S
Speaker: SB-PM23P-M
n System : SC-PM23PC-S
Music center: SA-PM23PC-S
Speaker: SB-PM23P-M
9.9.
Disassembly of Deck Mechanism
23
9.10. Disassembly of Panel P.C.B.
23
9.11. Disassembly of Tuner Extent P.C.B.
24
9.12. Disassembly of Transformer P.C.B.
24
9.13. Disassembly of Rear Panel
25
9.14. Disassembly of Main/Power P.C.B.
25
9.15. Replacement of CD Lid and CD Open Spring
26
9.16. Replacement of CD Damper Gear
27
9.17. Replacement of Cassette Lid and Cassette Open Spring
27
9.18. Replacement of Cassette Damper Gear
28
9.19. Replacement of optical pickup unit (CD mechanism)
28
9.20. Replacement of a traverse gear A and a traverse gear B
30
9.21. Procedure for Replacing Pinch Roller and Head Block
(Deck Mechanism Unit)
31
9.22. Procedure for Replacing Motor, Capstan Belt A, Capstan
Belt B, and Winding Belt (Deck Mechanism Unit)
32
9.23. Procedure for Replacing Parts on Deck Mechanism PCB
33
9.24. Replacement of PCB Cover
34
9.25. Handling of cassette tape jam
34
10 Service Fixture and Tools
35
11 Service Positions
35
11.1. Checking and Repairing of Main/Power P.C.B.
35
11.2. Checking and Repairing of Transformer P.C.B.
36
CONTENTS
Page
Page
2
SA-PM23P / SA-PM23PC
11.3. Checking and Repairing of CD Servo & CD Open/Close
P.C.B.
37
11.4. Checking and Repairing of Panel P.C.B.
38
11.5. Checking and Repairing of Tuner Extent P.C.B.
39
11.6. Checking and Repairing of Deck & Deck Mechanism
P.C.B.
40
12 Procedure for Checking Operation of Individual Parts of Deck
Mechanism Unit
41
12.1. Operation Check with Cassette Tape
41
12.2. Operation Check without Cassette Tape
41
13 Measurement And Adjustments
43
13.1. Cassette Deck Section
43
14 Voltage Measurement and Waveform Chart
45
14.1. Voltage Measurement
45
14.2. Waveform
48
15 Wiring Connection Diagram
51
16 Block Diagram
53
17 Schematic Diagram
57
17.1. CD Servo Circuit
59
17.2. Main/Power Circuit, Tuner Extent Circuit and CD
Open/Close Circuit
61
17.3. Panel Circuit and Transformer Circuit
65
17.4. Deck Circuit and Deck Mechanism Circuit
67
18 Printed Circuit Board
69
18.1. CD Servo P.C.B.
69
18.2. Main/Power P.C.B.
70
18.3. Tuner Extent P.C.B, CD Open/Close P.C.B and Panel
P.C.B.
71
18.4. Deck P.C.B and Deck Mechanism P.C.B.
72
18.5. Transformer P.C.B.
73
19 Illustration of IC's, Transistors and Diodes
75
20 Terminal Function of IC's
76
20.1. IC7001 (MN6627954MA) IC SERVO
PROCESSOR/DIGITAL SIGNAL PROCESSOR/DIGITAL
FILTER D/A CONVERTER
76
20.2. IC7002 (BA5948FPE2) IC 4CH Drive
77
20.3. IC803 (MN101C49GHD) MICROPROCESSOR
77
21 Troubleshooting Flowchart (CD Section Circuit)
79
22 Exploded Views
81
22.1. Cabinet Parts Location
81
22.2. Deck Mechanism (RAA4402-S) & Traverse Part Location
82
22.3. Packaging
83
23 Replacement Parts List
85
3
SA-PM23P / SA-PM23PC
(This “Safety Precaution” is applied only in U.S.A.)
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. Before servicing, unplug the power cord to prevent an electric shock.
2. When replacing parts, use only manufacturer’s recommended components for safety.
3. Check the condition of the power cord. Replace if wear or damage is evident.
4. After servicing, be sure to restore the lead dress, insulation barriers, insulation papers, shields, etc.
5. Before returning the serviced equipment to the customer, be sure to make the following insulation resistance test to prevent the
2. When replacing parts, use only manufacturer’s recommended components for safety.
3. Check the condition of the power cord. Replace if wear or damage is evident.
4. After servicing, be sure to restore the lead dress, insulation barriers, insulation papers, shields, etc.
5. Before returning the serviced equipment to the customer, be sure to make the following insulation resistance test to prevent the
customer from being exposed to a shock hazard.
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
.
Fig. 1
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 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.
4
SA-PM23P / SA-PM23PC