Panasonic SA-PM41E / SA-PM41EB / SA-PM41EG Service Manual ▷ View online
n Amplifier Section
RMS Output power both channel driven
10%, Total harmonic distortion
1 kHz
(Low channel)
41 W per channel (6
Ω)
8 kHz
(High channel)
39 W per channel (6
Ω)
Total Bi-Amp power
80 W per channel
Input Impedance
250 mV
Output Impedance
Headphone
16
Ω - 32 Ω
n FM Tuner Section
Frequency range
87.5 MHz - 108.0 MHz
(50 kHz steps)
Sensitivity
1.02 µV (IHF)
S/N 26dB
1.00 µV
Antenna terminal(s)
75
Ω (unbalanced)
Preset Station
15
n AM Tuner Section
Frequency range
522 kHz - 1629 kHz (9 kHz steps)
520 kHz - 1630 kHz (10 kHz
steps)
Sensitivity
S/N 20 dB (at 999 kHz)
900 µV/m
Preset Station
15
n Cassette Deck Section
2005 Co. .
SA-PM41E
SA-PM41EB
SA-PM41EG
SA-PM41EB
SA-PM41EG
Colour
(S)... Silver Type
(S)... Silver Type
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
Erasing system
AC erase 100 kHz
Tape speed
4.8 cm/s
Over frequency response (+3 dB, -6 dB) at DECK OUT)
NORMAL
35 Hz - 14 kHz
S/N RATIO
42.64 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
CD, CD-R, CD-RW, MP3
8cm / 12cm
Sampling frequency
CD
44.1 kHz
MP3
32 kHz, 44.1 kHz, 48 kHz
Bit rate
32kbps - 320kbps
Decoding
16/20/24 bit linear
Pick up
Beam source/wavelength
Semiconductor laser/780 nm
Number of channels
Stereo
Frequency response
20 Hz - 20 kHz (+1dB, -2dB)
CD Stereo System
Specification
ORDER NO. MD0503061C2
Wow and flutter
Below measurable limit
Digital filter
8 fs
D/A converter
MASH (1 bit DAC)
n General
Power supply
AC 230 V, 50 Hz (For E, EG)
AC 230 - 240 V, 50 Hz (For EB)
Power consumption
130 W
Dimensions (W x H x D)
175 mm x 254 mm x 391 mm
Mass
5.8 kg
Power consumption in standby
mode
mode
0.6 W
1 Safety Precautions
4
1.1.
GENERAL GUIDELINES
4
2 Caution for AC Mains Lead
5
3 Before Repair and Adjustment
6
4 Protection Circuitry
6
5 Handling the Lead-free Solder
6
5.1.
About lead free solder (PbF)
6
6 Precaution of Laser Diode
7
7 Handling Precautions For Traverse Deck
8
8 Accessories
9
9 Operation Procedures
10
10 Information on Disc & MP3
11
11 Assembling and Disassembling
12
11.1. Disassembly flow chart
13
11.2. Disassembly of Side Panel L & R
14
11.3. Disassembly of Top Cabinet
14
11.4. Disassembly of Deck P.C.B. and Tape Eject P.C.B.
14
11.5. Disassembly of Front Panel
15
11.6. Disassembly of Main Control P.C.B., Function P.C.B. and
Power In P.C.B.
16
11.7. Disassembly of Panel P.C.B.
17
11.8. Disassembly of Rear Cabinet
17
11.9. Disassembly of Main P.C.B.
18
11.10. Disassembly of Transformer P.C.B.
18
11.11. Disassembly of Tuner Pack
19
11.12. Disassembly of Power P.C.B.
19
11.13. Disassembly of CR16 Mechanism
19
11.14. Replacement of CD Lid
20
11.15. Replacement of Cassette Lid
21
11.16. Replacement of the Power IC and Transistors
22
11.17. Procedure for Replacing Pinch Roller and Head Block
(Deck Mechanism Unit)
22
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.
3. The labels “HIGH” and “Low” on the rear of the speakers refer to
High frequency and Low frequency.
High frequency and Low frequency.
n System : SC-PM41E-S
Music center: SA-PM41E-S
Speaker: SB-PM41E-M
n System : SC-PM41EB-S
Music center: SA-PM41EB-S
Speaker: SB-PM41E-M
n System : SC-PM41EG-S
Music center: SA-PM41EG-S
Speaker: SB-PM41E-M
11.18. Procedure for Replacing Motor, Capstan Belt A, Capstan
Belt B, and Winding Belt (Deck Mechanism Unit)
23
11.19. Procedure for Replacing Parts on Deck Mechanism PCB
25
11.20. Disassembly of CR16 Mechanism
25
11.21. Replacement of optical pickup unit (CD mechanism)
26
11.22. Replacement of a traverse gear A and a traverse gear B
28
11.23. Procedure for removing CD loading mechanism
29
11.24. CR16 mechanism disassembly procedure
29
11.25. CR16 MECHANISM ASSEMBLY PROCEDURE
35
11.26. Disassembly of traverse mechanism
48
11.27. Handling of cassette tape jam
49
12 Service Positions
50
12.1. Checking procedure
50
12.2. Checking the major P.C.B
50
13 Self-Diagnostic Display Function
51
13.1. Entering into Self-Diagnostic Mode
51
13.2. Clearing Self-Diagnostic Memory
52
13.3. Displaying Self-Diagnostic Results
53
13.4. Error Code Table
53
13.5. Deck Mechanism Self-Diagnostic Mode
54
13.6. Changer Reliability Test Mode
54
13.7. Changer Operation Checking
55
13.8. CR16 Mechanism Ageing Mode
55
14 Procedure for Checking Operation of Individual Parts of Deck
Mechanism Unit
57
14.1. Operation Check with Cassette Tape
57
14.2. Operation Check without Cassette Tape
57
15 Measurement And Adjustments
59
15.1. Cassette Deck Section
59
16 Voltage Measurement
61
CONTENTS
Page
Page
2
SA-PM41E / SA-PM41EB / SA-PM41EG
16.1. CD SERVO P.C.B.
61
16.2. MAIN P.C.B.
62
16.3. MAIN CONTROL P.C.B.
63
16.4. PANEL P.C.B.
63
16.5. DECK P.C.B.
63
16.6. DECK MECHANISM P.C.B.
64
16.7. CD LOADING P.C.B.
64
16.8. POWER P.C.B.
64
16.9. TRANSFORMER P.C.B.
64
17 Waveform Chart
65
18 Block Diagram
66
18.1. CD SERVO Block
66
18.2. MAIN Block
68
19 Notes of Schematic Diagram
74
20 Schematic Diagram
75
20.1. CD SERVO CIRCUIT
75
20.2. MAIN CIRCUIT
77
20.3. MAIN CONTROL CIRCUIT
81
20.4. PANEL CIRCUIT, POWER IN CIRCUIT and FUNCTION
CIRCUIT
83
20.5. DECK CIRCUIT, DECK MECHANISM CIRCUIT and TAPE
EJECT CIRCUIT
84
20.6. POWER CIRCUIT
86
20.7. TRANSFORMER CIRCUIT
89
20.8. CD LOADING CIRCUIT
90
21 Printed Circuit Board
91
21.1. CD SERVO P.C.B
91
21.2. MAIN P.C.B
92
21.3. MAIN CONTROL P.C.B and PANEL P.C.B
94
21.4. POWER IN P.C.B, FUNCTION P.C.B and DECK
MECHANISM P.C.B
95
21.5. DECK P.C.B and TAPE EJECT P.C.B
96
21.6. POWER P.C.B
97
21.7. TRANSFORMER P.C.B
98
21.8. CD LOADING P.C.B
99
22 Wiring Connection Diagram
100
23 Illustration of IC 痴, Transistors and Diodes
102
24 Terminal Function of ICｴs
103
24.1. IC302 (C2CBJG000575) MICROPROCESSOR
103
24.2. IC702 (MN6627953HB) Servo processor/ Digital signal
processor/ Digital filter/ D/A converter
104
24.3. IC703 (BA5948FPE2) IC 4CH DRIVE
104
25 Troubleshooting Flowchart (CD Section Circuit)
106
26 Parts Location and Replacement Parts List
108
26.1. Deck Mechanism
109
26.2. CD LOading Mechanisms
111
26.3. Cabinet Part List
116
26.4. Electrical Part List
120
26.5. Packaging Materials & Accessories Parts List
129
26.6. Packaging
129
3
SA-PM41E / SA-PM41EB / SA-PM41EG
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
.
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-PM41E / SA-PM41EB / SA-PM41EG
