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1、SERVICE MANUAL COPYRIGHT 2006 Victor Company of Japan, Limited No.MA245 2006/1 CD RECEIVER KD-AR370J,KD-G320J,KD-G421E,KD-G421EX, KD-G421EY,KD-G421EU,KD-G424UI,KD-G425U, KD-G425UN,KD-G425UT,KD-G425UH,KD-G427EE Lead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade) T
2、ABLE OF CONTENTS 1PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7 2SPECIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3、. . . . . . 1-10 3DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11 4ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4、 . . . . . . . . . . . . . . 1-14 5TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15 RadioFans.CN 收音机爱 好者资料库 1-2 (No.MA245) SPECIFICATION KD-AR370/KD-G320 AUDIO AMPLIFIER SECTION Power Output18 W RMS
5、 4 Channels at 4 and or = 1% THD+N Signal to Noise Ratio80 dBA (reference: 1 W into 4 ) Load Impedance4 (4 to 8 allowance) Tone Control RangeBass10 dB at 100 Hz Treble10 dB at 10 kHz Frequency Response40 Hz to 20 000 Hz Line-Out Level/Impedance2.5 V /20 k load (full scale) Output Impedance1 k Subwoo
6、fer-Out Level/Impedance2.0 V /20 k load (full scale) Other TerminalCD changer TUNER SECTION Frequency RangeFM87.5 MHz to 107.9 MHz (with channel interval set to 100 kHz or 200 kHz) 87.5 MHz to 108.0 MHz (with channel interval set to 50 kHz) AM530 kHz to 1 710 kHz (with channel interval set to 10 kHz
7、) 531 kHz to 1 602 kHz (with channel interval set to 9 kHz) FM TunerUsable Sensitivity11.3 dBf (1.0 V/75 ) 50 dB Quieting Sensitivity16.3 dBf (1.8 V/75 ) Alternate Channel Selectivity (400 kHz) 65 dB Frequency Response40 Hz to 15 000 Hz Stereo Separation35 dB Capture Ratio1.5 dB AM TunerSensitivity2
8、0 V Selectivity35 dB CD PLAYER SECTION TypeCompact disc player Signal Detection SystemNon-contact optical pickup (semiconductor laser) Number of Channels2 channels (stereo) Frequency Response5 Hz to 20 000 Hz Dynamic Range96 dB Signal-to-Noise Ratio98 dB Wow and FlutterLess than measurable limit MP3
9、 Decoding FormatMPEG1/2 Audio Layer 3 Max. Bit Rate: 320 kbps WMA (Windows Media Audio) Decoding FormatMax. Bit Rate: 192 kbps GENERAL Power RequirementOperating VoltageDC 14.4 V (11 V to 16 V allowance) Grounding SystemNegative ground Allowable Operating Temperature0C to +40C (32F to 104F) Dimensio
10、ns (W H D) Installation Size (approx.)182 mm 52 mm 150 mm (7-3/16 2-1/16 5-15/16) Panel Size (approx.)188 mm 58 mm 11 mm (7-7/16 2-5/16 7/16) Mass (approx.)1.4 kg (3.1 lbs) (excluding accessories) RadioFans.CN 收音机爱 好者资料库 (No.MA245)1-3 KD-G421 AUDIO AMPLIFIER SECTION Maximum Power OutputFront50 W per
11、 channel Rear50 W per channel Continuous Power Output (RMS) Front19 W per channel into 4 , 40 Hz to 20 000 Hz at no more than 0.8% total harmonic distortion. Rear19 W per channel into 4 , 40 Hz to 20 000 Hz at no more than 0.8% total harmonic distortion. Load Impedance4 (4 to 8 allowance) Tone Contr
12、ol RangeBass10 dB at 100 Hz Treble10 dB at 10 kHz Frequency Response40 Hz to 20 000 Hz Signal-to-Noise Ratio70 dB Line-Out Level/Impedance2.5 V/20 k load (full scale) Output Impedance1 k Other TerminalsCD changer, Steering wheel remote input TUNER SECTION Frequency RangeFM87.5 MHz to 108.0 MHz AM(MW
13、) 522 kHz to 1 620 kHz (LW) 144 kHz to 279 kHz FM TunerUsable Sensitivity11.3 dBf (1.0 V/75 ) 50 dB Quieting Sensitivity16.3 dBf (1.8 V/75 ) Alternate Channel Selectivity (400 kHz) 65 dB Frequency Response40 Hz to 15 000 Hz Stereo Separation30 dB Capture Ratio1.5 dB MW TunerSensitivity20 V Selectivi
14、ty35 dB LW TunerSensitivity50 V CD PLAYER SECTION TypeCompact disc player Signal Detection SystemNon-contact optical pickup (semiconductor laser) Number of Channels2 channels (stereo) Frequency Response5 Hz to 20 000 Hz Dynamic Range96 dB Signal-to-Noise Ratio98 dB Wow and FlutterLess than measurabl
15、e limit MP3 Decoding FormatMPEG1/2 Audio Layer 3 Max. Bit Rate: 320 kbps WMA (Windows Media Audio) Decoding FormatMax. Bit Rate: 192 kbps GENERAL Power RequirementOperating VoltageDC 14.4 V (11 V to 16 V allowance) Grounding SystemNegative ground Allowable Operating Temperature0C to +40C Dimensions
16、(W H D)Installation Size (approx.)182 mm 52 mm 150 mm Panel Size (approx.)188 mm 58 mm 11 mm Mass (approx.)1.4 kg (excluding accessories) RadioFans.CN 收音机爱 好者资料库 1-4 (No.MA245) KD-G424 AUDIO AMPLIFIER SECTION Maximum Power OutputFront50 W per channel Rear50 W per channel Continuous Power Output (RMS
17、) Front19 W per channel into 4 , 40 Hz to 20 000 Hz at no more than 0.8% total harmonic distortion. Rear19 W per channel into 4 , 40 Hz to 20 000 Hz at no more than 0.8% total harmonic distortion. Load Impedance4 (4 to 8 allowance) Tone Control RangeBass10 dB at 100 Hz Treble10 dB at 10 kHz Frequenc
18、y Response40 Hz to 20 000 Hz Signal-to-Noise Ratio70 dB Line-Out Level/Impedance2.5 V/20 k load (full scale) Subwoofer-Out Level/Impedance2.0 V/20 k load (full scale) Output Impedance1 k Other TerminalCD changer TUNER SECTION Frequency RangeFM87.5 MHz to 108.0 MHz AM531 kHz to 1 602 kHz FM TunerUsab
19、le Sensitivity11.3 dBf (1.0 V/75 ) 50 dB Quieting Sensitivity16.3 dBf (1.8 V/75 ) Alternate Channel Selectivity (400 kHz) 65 dB Frequency Response40 Hz to 15 000 Hz Stereo Separation30 dB Capture Ratio1.5 dB AM TunerSensitivity20 V Selectivity35 dB CD PLAYER SECTION TypeCompact disc player Signal De
20、tection SystemNon-contact optical pickup (semiconductor laser) Number of Channels2 channels (stereo) Frequency Response5 Hz to 20 000 Hz Dynamic Range96 dB Signal-to-Noise Ratio98 dB Wow and FlutterLess than measurable limit MP3 Decoding FormatMPEG1/2 Audio Layer 3 Max. Bit Rate: 320 kbps WMA (Windo
21、ws Media Audio) Decoding FormatMax. Bit Rate: 192 kbps GENERAL Power RequirementOperating VoltageDC 14.4 V (11 V to 16 V allowance) Grounding SystemNegative ground Allowable Operating Temperature0C to +40C Dimensions (W H D)Installation Size (approx.)182 mm 52 mm 150 mm Panel Size (approx.)188 mm 58
22、 mm 11 mm Mass (approx.)1.4 kg (excluding accessories) (No.MA245)1-5 KD-G425 AUDIO AMPLIFIER SECTION Maximum Power OutputFront50 W per channel Rear50 W per channel Continuous Power Output (RMS) Front19 W per channel into 4 , 40 Hz to 20 000 Hz at no more than 0.8% total harmonic distortion. Rear19 W
23、 per channel into 4 , 40 Hz to 20 000 Hz at no more than 0.8% total harmonic distortion. Load Impedance4 (4 to 8 allowance) Tone Control RangeBass10 dB at 100 Hz Treble10 dB at 10 kHz Frequency Response40 Hz to 20 000 Hz Signal-to-Noise Ratio70 dB Line-Out Level/Impedance2.5 V/20 k load (full scale)
24、 Subwoofer-Out Level/Impedance2.0 V/20 k load (full scale) Output Impedance1 k Other TerminalCD changer TUNER SECTION Frequency RangeFM87.5 MHz to 108.0 MHz AM531 kHz to 1 602 kHz FM TunerUsable Sensitivity11.3 dBf (1.0 V/75 ) 50 dB Quieting Sensitivity16.3 dBf (1.8 V/75 ) Alternate Channel Selectiv
25、ity (400 kHz) 65 dB Frequency Response40 Hz to 15 000 Hz Stereo Separation30 dB Capture Ratio1.5 dB AM TunerSensitivity20 V Selectivity35 dB CD PLAYER SECTION TypeCompact disc player Signal Detection SystemNon-contact optical pickup (semiconductor laser) Number of Channels2 channels (stereo) Frequen
26、cy Response5 Hz to 20 000 Hz Dynamic Range96 dB Signal-to-Noise Ratio98 dB Wow and FlutterLess than measurable limit MP3 Decoding FormatMPEG1/2 Audio Layer 3 Max. Bit Rate: 320 kbps WMA (Windows Media Audio) Decoding FormatMax. Bit Rate: 192 kbps GENERAL Power RequirementOperating VoltageDC 14.4 V (
27、11 V to 16 V allowance) Grounding SystemNegative ground Allowable Operating Temperature0C to +40C Dimensions (W H D)Installation Size (approx.)182 mm 52 mm 150 mm Panel Size (approx.)188 mm 58 mm 11 mm Mass (approx.)1.4 kg (excluding accessories) 1-6 (No.MA245) KD-G427 Microsoft and Windows Media ar
28、e either registered trademarks or trademarks of Microsoft Corporation in the United States and/ or other countries. iPod is a trademark of Apple Computer, Inc., registered in the U.S. and other countries. Design and specifications are subject to change without notice. AUDIO AMPLIFIER SECTION Maximum
29、 Power OutputFront50 W per channel Rear50 W per channel Continuous Power Output (RMS) Front19 W per channel into 4 , 40 Hz to 20 000 Hz at no more than 0.8% total harmonic distortion. Rear19 W per channel into 4 , 40 Hz to 20 000 Hz at no more than 0.8% total harmonic distortion. Load Impedance4 (4
30、to 8 allowance) Tone Control RangeBass10 dB at 100 Hz Treble10 dB at 10 kHz Frequency Response40 Hz to 20 000 Hz Signal-to-Noise Ratio70 dB Line-Out Level/Impedance2.5 V/20 k load (full scale) Output Impedance1 k Other TerminalCD changer TUNER SECTION Frequency RangeFM1/FM287.5 MHz to 108.0 MHz FM36
31、5.00 MHz to 74.00 MHz AM(MW) 522 kHz to 1 620 kHz (LW) 144 kHz to 279 kHz FM TunerUsable Sensitivity11.3 dBf (1.0 V/75 ) 50 dB Quieting Sensitivity16.3 dBf (1.8 V/75 ) Alternate Channel Selectivity (400 kHz) 65 dB Frequency Response40 Hz to 15 000 Hz Stereo Separation30 dB Capture Ratio1.5 dB MW Tun
32、erSensitivity20 V Selectivity35 dB LW TunerSensitivity50 V CD PLAYER SECTION TypeCompact disc player Signal Detection SystemNon-contact optical pickup (semiconductor laser) Number of Channels2 channels (stereo) Frequency Response5 Hz to 20 000 Hz Dynamic Range96 dB Signal-to-Noise Ratio98 dB Wow and
33、 FlutterLess than measurable limit MP3 Decoding FormatMPEG1/2 Audio Layer 3 Max. Bit Rate: 320 kbps WMA (Windows Media Audio) Decoding FormatMax. Bit Rate: 192 kbps GENERAL Power RequirementOperating VoltageDC 14.4 V (11 V to 16 V allowance) Grounding SystemNegative ground Allowable Operating Temper
34、ature0C to +40C Dimensions (W H D)Installation Size (approx.)182 mm 52 mm 150 mm Panel Size (approx.)188 mm 58 mm 11 mm Mass (approx.)1.4 kg (excluding accessories) (No.MA245)1-7 SECTION 1 PRECAUTIONS 1.1Safety Precautions ! Burrs formed during molding may be left over on some parts of the chassis.
35、Therefore, pay attention to such burrs in the case of preforming repair of this system. ! Please use enough caution not to see the beam directly or touch it in case of an adjustment or operation check. 1-8 (No.MA245) 1.2Preventing static electricity Electrostatic discharge (ESD), which occurs when s
36、tatic electricity stored in the body, fabric, etc. is discharged, can destroy the laser diode in the traverse unit (optical pickup). Take care to prevent this when performing repairs. 1.2.1 Grounding to prevent damage by static electricity Static electricity in the work area can destroy the optical
37、pickup (laser diode) in devices such as CD players. Be careful to use proper grounding in the area where repairs are being performed. (1) Ground the workbench Ground the workbench by laying conductive material (such as a conductive sheet) or an iron plate over it before placing the traverse unit (op
38、tical pickup) on it. (2) Ground yourself Use an anti-static wrist strap to release any static electricity built up in your body. (3) Handling the optical pickup In order to maintain quality during transport and before installation, both sides of the laser diode on the replacement optical pickup are
39、shorted. After replacement, return the shorted parts to their original condition. (Refer to the text.) Do not use a tester to check the condition of the laser diode in the optical pickup. The testers internal power source can easily destroy the laser diode. 1.3Handling the traverse unit (optical pic
40、kup) (1) Do not subject the traverse unit (optical pickup) to strong shocks, as it is a sensitive, complex unit. (2) Cut off the shorted part of the flexible cable using nippers, etc. after replacing the optical pickup. For specific details, refer to the replacement procedure in the text. Remove the
41、 anti-static pin when replacing the traverse unit. Be careful not to take too long a time when attaching it to the connector. (3) Handle the flexible cable carefully as it may break when subjected to strong force. (4) It is not possible to adjust the semi-fixed resistor that adjusts the laser power.
42、 Do not turn it. 1.4Attention when traverse unit is decomposed *Please refer to Disassembly method in the text for the CD pickup unit. Apply solder to the short land before the flexible wire is disconnected from the connector on the CD pickup unit. (If the flexible wire is disconnected without apply
43、ing solder, the CD pickup may be destroyed by static electricity.) In the assembly, be sure to remove solder from the short land after connecting the flexible wire. 1M (caption) Anti-static wrist strap Conductive material (conductive sheet) or iron plate Wires Push switch Pickup Base board Pickup Co
44、nnector Flexible wire Frame CD mechanism assembly (No.MA245)1-9 1.5Important for laser products 1.CLASS 1 LASER PRODUCT 2.DANGER : Invisible laser radiation when open and inter lock failed or defeated. Avoid direct exposure to beam. 3.CAUTION : There are no serviceable parts inside the Laser Unit. D
45、o not disassemble the Laser Unit. Replace the complete Laser Unit if it malfunctions. 4.CAUTION : The CD,MD and DVD player uses invisible laser radiation and is equipped with safety switches which prevent emission of radiation when the drawer is open and the safety interlocks have failed or are defe
46、ated. It is dangerous to defeat the safety switches. 5.CAUTION : If safety switches malfunction, the laser is able to function. 6.CAUTION : Use of controls, adjustments or performance of procedures other than those specified here in may result in hazardous radiation exposure. REPRODUCTION AND POSITI
47、ON OF LABELS ! Please use enough caution not to see the beam directly or touch it in case of an adjustment or operation check. WARNING LABEL CAUTION Visible and Invisible laser radiation when open and interlock failed or defeated AVOID DIRECT EXPOSURE TO BEAM (e) VARNING Synlig och osynling laserstr
48、lning nr den ppnas och sprren r urkopplad Betrakta ej strlen (s) VARO Avataessa ja suojaluktus ohtettuna tai viallisena olet alttina nkyvlle ja nkymttmlle laserstelylle Vt steen kohdstumsta suoraan tseesi (f) ADVARSEL Synlg og usynlig laserstrling nr maskinen er ben eller interlocken fejeler Undg di
49、rekte eksponering til strling (d) CLASS 1 LASER PRODUCT 1-10 (No.MA245) SECTION 2 SPECIFIC SERVICE INSTRUCTIONS 2.1DIFFERENT POINT 2.2CD MECHANISM For the CD mechanism, please refer the mechanism manual TN2007-1001 (No.MY003). KD-AR370KD-G320KD-G421KD-G424KD-G425KD-G427 YESYESNONONONO YESYES YESYESYESYESYES NO NO NONONO YESYESNONONONO REMOTE CONTROLLER (No.MA245)1-11 SECTION 3 DISASSEMBLY 3.1Main body section 3.1.1Removing the front panel assembly (See Fig.1) (1) Push the
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