n DISC SECTIONDisc played [8 cm or 12 cm](1) CD-Audio (CD-DA)(2) CD-R/RW (CD-DA, MP3, WMA formatted disc)(3) MP3/WMABit rateMP3, WMA 32 kbps to 320 kbpsSampling frequencyMP3/WMA 32 kHz, 44.1 kHz, 48 kHzCD-DA 44.1 kHzDecoding 16 bit linearDigital filter 8 fsD/A converter MASH (1 bit DAC)Pick upWavelength 780 nmBeam Source Semiconductor laserAudio output (Disc)Number of channels 2 (Stereo) (FL,FR)n GENERAL1 Safety Precautions 41.1. General Guidelines 41.2. Before repair and adjustment 41.3. Protection Circuitry 42 Prevention of Electro Static Discharge (ESD) toElectrostatically Sensitive (ES) Devices 53 Handling Precautions For Traverse Deck 64 Precaution of laser diode 75 Handling the Lead-free Solder 85.1. About lead free solder (PbF) 86 New Features 96.1. CRS1 Mechanism Overview 96.2. Music Port 117 Accessories 128 Operating Instructions Procedures 139 Self diagnosis and special mode setting 159.1. Special Mode Table 159.2. Error code Table 1710 Assembling and Disassembling 2110.1. Caution 2110.2. Disassembly flow chart 2210.3. Main Parts Location 2310.4. Disassembly of Top Cabinet 2410.5. Disassembly of Rear Panel 2410.6. Disassembly of CD Changer Unit (CRS1) 2410.7. Disassembly of Main P.C.B. 26Power supply AC 120 V, 60HzPower consumption 132 WPower consumption in standbymode0.28 WDimensions (W x H x D) 250 x 330 x 343 mmMass 6.6 kgOperating temperature range +5 to +35°COperating humidity range 5 to 90% RH (no condensation)n SYSTEMSC-AK640 (PL) Music center: SA-AK640 (PL)Speaker: SB-AK640 (GC)Subwoofer: SB-WAK640 (GC)For information on speaker system, please refer to the originalService Manual (Order No. MD0512476A3) for SB-AK640GC and(Order No. MD0512477A3) for SB-WAK640GC.Notes:1. Specifications are subject to change without notice. Mass anddimensions are approximate.2. Total harmonic distortion is measured by the digital spectrumanalyzer.10.8. Disassembly of Transformer P.C.B. 2610.9. Disassembly of Power P.C.B. 2710.10. Disassembly of Front Panel Unit 2810.11. Disassembly for Panel P.C.B. 2910.12. Disassembly of Deck mechanism unit 3010.13. Disassembly of Deck P.C.B. 3010.14. Disassembly of Traverse Unit 3010.15. Disassembly of optical pickup unit (CD mechanism) 3210.16. Disassembly of Deck Mechanism 3410.17. Replacement for cassette lid 3810.18. Rectification for tape jam problem 3811 Service Fixture and Tools 4012 Service Positions 4012.1. Checking and Repairing of Main P.C.B. 4012.2. Checking and Repairing of Transformer P.C.B. 4112.3. Checking and Repairing of Panel, Deck & DeckMechanism P.C.B. 4212.4. Checking and Repairing of Power P.C.B. 4313 Adjustment Procedures 4413.1. Cassette Deck Section 4413.2. Tuner Section 4514 Voltage and Waveform Chart 4714.1. CD Servo P.C.B. & Main P.C.B. 4714.2. Power P.C.B. & Transformer P.C.B. 4914.3. Waveform Chart 5015 Wiring Connection Diagram 52CONTENTS Page Page2SA-AK640PL