Panasonic SA-PM21PC, Руководство по обслуживанию, Страница: 2 / 92

Pickup
Beam source / wavelength Semiconductor laser / 780nm
Number of channels Stereo
Wow and flutter Below measurable limit
Digital filter 8 fs
D/A converter MASH (1 bit DAC)
Frequency response 20Hz - 20 kHz (+1dB, -2dB)
n General
Power supply AC 120 V, 60 Hz
Power consumption 57 W
1 Safety Precautions 4
1.1. GENERAL GUIDELINES 4
2 Before Repair and Adjustment 6
3 Protection Circuitry 6
4 Handling the Lead-free Solder 6
4.1. About lead free solder (PbF) 6
5 Precaution of Laser Diode 7
6 Handling Precautions For Traverse Deck 8
7 Accessories 9
8 Operation Procedures 10
9 Information on CD & MP3 11
10 Assembling and Disassembling 12
10.1. Disassembly flow chart 12
10.2. Disassembly of Side Panel L & R 13
10.3. Disassembly of Top Cabinet Unit 13
10.4. Disassembly of Deck Mechanism and Tape Eject P.C.B 13
10.5. Disassembly of Headphone P.C.B 14
10.6. Disassembly of Front Panel Assembly 14
10.7. Disassembly of Panel P.C.B 15
10.8. Disassembly of Rear Cabinet 15
10.9. Disassembly of Tuner Pack 15
10.10. Disassembly of Main P.C.B 16
10.11. Disassembly of Power P.C.B 16
10.12. Disassembly of Speaker Terminal P.C.B 17
10.13. Disassembly of Transformer P.C.B 17
10.14. Disassembly of CD Mechanism 18
10.15. Checking Procedure for Each Major P.C.B. 19
10.16. Procedures of Replacing Traverse Base (Unit), Driving
Gear, and Cam Gear (CD Mechanism Unit) 19
10.17. Procedures for Replacing Optical Pickup (CD Mechanism
Unit) 22
10.18. Procedures for Replacement Traverse Gear A and
Traverse Gear B (CD Mechanism Unit) 23
Dimensions (W x H x D) 165 x 228 x 315.6 mm
(6 1/2” x 9” x 12 7/16”)
Mass 3.6 kg (7.9 Ibs)
Power consumption in standby
mode 0.5 W
Notes :
1. Specifications are subject to change without notices. Mass and
dimensions are approximate.
2. Total harmonic distortion is measured by the digital spectrum
analyzer.
n
System : SC-PM21PC-S Music center: SA-PM21PC-S
Speaker: SB-PM21E-MJ
10.19. Procedure for Replacing Cassette Holder 24
10.20. Procedure for Replacing Pinch Roller and Head Block
(Deck Mechanism Unit) 24
10.21. Procedure for Replacing Motor, Capstan Belt A, Capstan
Belt B, and Winding Belt (Deck Mechanism Unit) 25
10.22. Procedure for Replacing Parts on Deck Mechanism PCB
27
10.23. Handling of cassette tape jam 27
11 Service Positions 29
11.1. Checking procedure 29
11.2. Checking the major P.C.B. 29
12 Self Diagnostic Function 30
12.1. Self-diagnosis Function 30
12.2. Clearing all error code 32
12.3. Cancelling the Self-Diagnostic mode 32
12.4. Setting of doctor mode 32
13 Procedure for Checking Operation of Individual Parts of Deck
Mechanism Unit 37
13.1. Operation Check with Cassette Tape 37
13.2. Operation Check without Cassette Tape 37
14 Measurement And Adjustments 39
14.1. Cassette Deck Section 39
15 Voltage Measurement and Waveform Chart 41
15.1. Voltage Measurement 41
15.2. Waveform 43
16 Block Diagram 44
16.1. CD Servo Block 44
16.2. Main Block 46
17 Notes of Schematic Diagram 50
18 Schematic Diagram 51
18.1. CD Servo Circuit 51
18.2. Main Circuit and Tuner Extent Circuit 53
18.3. Panel Circuit 57
CONTENTS
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SA-PM21PC