Jvc-KDG-825-UH-Service-Manual(1) 电路图 维修手册.pdf

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1、SERVICE MANUAL COPYRIGHT 2006 Victor Company of Japan, Limited No.MA249 2006/2 CD RECEIVER MA24920062 KD-AR870J,KD-G820J,KD-G821E, KD-G821EX,KD-G821EY,KD-G821EU, KD-G824UI,KD-G825U,KD-G825UN, KD-G825UH,KD-G825UT,KD-G827EE Lead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 C

2、entigrade) TABLE OF CONTENTS 1PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7 2SPECIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3、. . . . . . . . . . . . 1-10 3DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11 4ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4、 . . . . . . . . . . . . . . . . . . . . 1-15 5TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16 RadioFans.CN 收音机爱 好者资料库 1-2 (No.MA249) SPECIFICATION KD-AR870/KD-G820 AUDIO AMPLIFIER SECTION Power Ou

5、tput20 W RMS 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 RangeLow12 dB (60 Hz, 80 Hz, 100 Hz, 200 Hz) Mid12 dB (500 Hz, 1 kHz, 1.5 kHz, 2.5 kHz) High12 dB (10 kHz, 12.5 kHz, 15 kHz,17.5 kHz) Frequency Response

6、40 Hz to 20 000 Hz Line-In Level/ImpedanceKD-AR8701.5V/20k load Line-Out Level/Impedance KD-AR8705.0 V/20 k load (full scale) KD-G8204.0 V/20 k load (full scale) Output Impedance1 k Subwoofer-Out Level/Impedance2.0 V/20 k load (full scale) Other TerminalsCD changer, LINE IN (for KD-AR870) TUNER SECT

7、ION 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) 531 kHz to 1 602 kHz (with channel interval set to 9 kHz) FM TunerUsable Sensitivity11

8、.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 AM TunerSensitivity20 V Selectivity35 dB CD PLAYER/USB MEMORY SECTION TypeCompact disc player Signal Detection SystemNon-contact

9、 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 (Windows Media Audio) Decoding

10、Max. Bit Rate : 192 kbps Playable USB memoryFormatFAT 12/16/32 StorageLess than 4 GB (1 partition type) Playable Audio FormatMP3/WMA Max. CurrentLess than 500 mA GENERAL Power RequirementOperating VoltageDC 14.4 V (11 V to 16 V allowance) Grounding SystemNegative ground Allowable Operating Temperatu

11、re0C to +40C (32F to 104F) Dimensions (W H D)Installation Size (approx.)182 mm 52 mm 152 mm (7-3/16 2-1/16 6) 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.MA249)1-3 KD-G821 AUDIO AMPLIFIER SECTION Maxim

12、um 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 (

13、4 to 8 allowance) Tone Control RangeLow12 dB (60 Hz, 80 Hz, 100 Hz, 200 Hz) Mid12 dB (500 Hz, 1 kHz, 1.5 kHz, 2.5 kHz) High12 dB (10 kHz, 12.5 kHz, 15 kHz, 17.5 kHz) Frequency Response40 Hz to 20 000 Hz Signal-to-Noise Ratio70 dB Line-Out Level/Impedance5.0 V/20 k load (full scale) Output Impedance1

14、 k Subwoofer-Out Level/Impedance2.0 V/20 k load (full scale) Other TerminalsCD changer, Steering wheel remote input TUNER SECTION Frequency RangeFM87.5 MHz to 108.0 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 d

15、Bf (1.8 V/75 ) Alternate Channel Selectivity (400 kHz) 65 dB Frequency Response40 Hz to 15 000 Hz Stereo Separation30 dB MW TunerSensitivity20 V Selectivity35 dB LW TunerSensitivity50 V CD PLAYER/USB MEMORY SECTION TypeCompact disc player Signal Detection SystemNon-contact optical pickup (semiconduc

16、tor 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 (Windows Media Audio) Decoding FormatMax. Bit Rate : 192

17、kbps Playable USB memoryFormatFAT 12/16/32 StorageLess than 4 GB (1 partition type) Playable Audio FormatMP3/WMA Max. CurrentLess than 500 mA GENERAL Power RequirementOperating VoltageDC 14.4 V (11 V to 16 V allowance) Grounding SystemNegative ground Allowable Operating Temperature0C to +40C Dimensi

18、ons (W H D)Installation Size (approx.)182 mm 52 mm 152 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.MA249) KD-G824 AUDIO AMPLIFIER SECTION Maximum Power OutputFront50 W per channel Rear50 W per channel Continuous Power Output

19、(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 Control RangeLow12 dB (60 Hz, 80 Hz, 100 Hz, 200 Hz) Mid12

20、dB (500 Hz, 1 kHz, 1.5 kHz, 2.5 kHz) High12 dB (10 kHz, 12.5 kHz, 15 kHz, 17.5 kHz) Frequency Response40 Hz to 20 000 Hz Signal-to-Noise Ratio70 dB Line-Out Level/Impedance5.0 V/20 k load (full scale) Output Impedance1 k Subwoofer-Out Level/Impedance2.0 V/20 k load (full scale) Other TerminalCD chan

21、ger 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 Selectivity (400 kHz) 65 dB Frequency Response40 Hz to 15 000 Hz Stereo Separation30 dB AM TunerSensitivity2

22、0 V Selectivity35 dB CD PLAYER/USB MEMORY 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

23、e limit MP3 Decoding FormatMPEG1/2 Audio Layer 3 Max. Bit Rate : 320 kbps WMA (Windows Media Audio) DecodingMax. Bit Rate : 192 kbps Playable USB memoryFormatFAT 12/16/32 StorageLess than 4 GB (1 partition type) Playable Audio FormatMP3/WMA Max. CurrentLess than 500 mA GENERAL Power RequirementOpera

24、ting 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 152 mm Panel Size (approx.)188 mm 58 mm 11 mm Mass (approx.)1.4 kg (excluding accessories) (No.MA249)1-5 KD-G825 AUDIO AM

25、PLIFIER 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 per channel into 4 , 40 Hz to 20 000 Hz at no more than 0.8% total harmonic distorti

26、on. Load Impedance4 (4 to 8 allowance) Tone Control RangeLow12 dB (60 Hz, 80 Hz, 100 Hz, 200 Hz) Mid12 dB (500 Hz, 1 kHz, 1.5 kHz, 2.5 kHz) High12 dB (10 kHz, 12.5 kHz, 15 kHz, 17.5 kHz) Frequency Response40 Hz to 20 000 Hz Signal-to-Noise Ratio70 dB Line-Out Level/Impedance5.0 V/20 k load (full sca

27、le) Output Impedance1 k Subwoofer-Out Level/Impedance2.0 V/20 k load (full scale) 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 Selec

28、tivity (400 kHz) 65 dB Frequency Response40 Hz to 15 000 Hz Stereo Separation30 dB AM TunerSensitivity20 V Selectivity35 dB CD PLAYER/USB MEMORY SECTION TypeCompact disc player Signal Detection SystemNon-contact optical pickup (semiconductor laser) Number of Channels2 channels (stereo) Frequency Res

29、ponse5 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) DecodingMax. Bit Rate : 192 kbps Playable USB memoryFormatFAT 12/16/32 StorageLess than 4 GB (1 p

30、artition type) Playable Audio FormatMP3/WMA Max. CurrentLess than 500 mA 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 152 mm Panel Size

31、(approx.)188 mm 58 mm 11 mm Mass (approx.)1.4 kg (excluding accessories) 1-6 (No.MA249) KD-G827 Design and specifications are subject to change without notice. Microsoft and Windows Media are either registered trademarks or trademarks of Microsoft Corporation in the United States and/ or other count

32、ries. iPod is a trademark of Apple Computer, Inc., registered in the U.S. and other countries. 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 di

33、stortion. 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 RangeLow12 dB (60 Hz, 80 Hz, 100 Hz, 200 Hz) Mid12 dB (500 Hz, 1 kHz, 1.5 kHz, 2.5 kHz) High12 dB (10 kHz, 12.5 kHz, 15 kHz, 17.5 kHz) Frequency

34、Response40 Hz to 20 000 Hz Signal-to-Noise Ratio70 dB Line-Out Level/Impedance5.0 V/20 k load (full scale) Output Impedance1 k Subwoofer-Out Level/Impedance2.0 V/20 k load (full scale) Other TerminalCD changer TUNER SECTION Frequency RangeFM1/FM287.5 MHz to 108.0 MHz FM365.00 MHz to 74.00 MHz AM(MW)

35、 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 MW TunerSensitivity20 V Selectivity35 dB LW TunerSensi

36、tivity50 V CD PLAYER/USB MEMORY 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 MP

37、3 Decoding FormatMPEG1/2 Audio Layer 3 Max. Bit Rate : 320 kbps WMA (Windows Media Audio) Decoding FormatMax. Bit Rate : 192 kbps Playable USB memoryFormatFAT 12/16/32 StorageLess than 4 GB (1 partition type) Playable Audio FormatMP3/WMA Max. CurrentLess than 500 mA GENERAL Power RequirementOperatin

38、g 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 152 mm Panel Size (approx.)188 mm 58 mm 11 mm Mass (approx.)1.4 kg (excluding accessories) (No.MA249)1-7 SECTION 1 PRECAUTIO

39、NS 1.1Safety Precautions ! Burrs formed during molding may be left over on some parts of the chassis. 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 che

40、ck. 1-8 (No.MA249) 1.2Preventing static electricity Electrostatic discharge (ESD), which occurs when static 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 Groundin

41、g to prevent damage by static electricity Static electricity in the work area can destroy the optical pickup (laser diode) in devices such as laser products. Be careful to use proper grounding in the area where repairs are being performed. (1) Ground the workbench Ground the workbench by laying cond

42、uctive material (such as a conductive sheet) or an iron plate over it before placing the traverse unit (optical 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 duri

43、ng transport and before installation, both sides of the laser diode on the replacement optical pickup are 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 te

44、sters internal power source can easily destroy the laser diode. 1.3Handling the traverse unit (optical pickup) (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 repl

45、acing the optical pickup. For specific details, refer to the replacement procedure in the text. Remove the 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 subject

46、ed to strong force. (4) It is not possible to adjust the semi-fixed resistor that adjusts the laser power. Do not turn it. 1.4Attention when traverse unit is decomposed *Please refer to Disassembly method in the text for the pickup unit. Apply solder to the short land before the flexible wire is dis

47、connected from the connector on the pickup unit. (If the flexible wire is disconnected without applying solder, the 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 C

48、onductive material (conductive sheet) or iron plate Pickup Short-circuit point (Soldering) Flexible wire (No.MA249)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 :

49、There are no serviceable parts inside the Laser Unit. Do 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 defeated. 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, adjustment