《Jvc-KWAVX-746-U-Service-Manual(1) 电路图 维修手册.pdf》由会员分享，可在线阅读，更多相关《Jvc-KWAVX-746-U-Service-Manual(1) 电路图 维修手册.pdf（22页珍藏版）》请在收音机爱好者资料库上搜索。
1、SERVICE MANUAL COPYRIGHT 2011 Victor Company of Japan, Limited No.MA493 2011/5 DVD RECEIVER WITH MONITOR MA49320115 SERVICE MANUAL KW-ADV794J, KW-AVX640E, KW-AVX640J, KW-AVX646EU, KW-AVX646U, KW-AVX648UF, KW-AVX740E, KW-AVX740EE, KW-AVX740J, KW-AVX746A, KW-AVX746EU, KW-AVX746U, KW-AVX746UT, KW-AVX74
2、8JW COPYRIGHT 2011 Victor Company of Japan, Limited Lead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade) Lead free solder used in the board (material : Sn-Cu, melting point : 230 Centigrade) TABLE OF CONTENTS 1PRECAUTION. . . . . . . . . . . . . . . . . . . . . .
3、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6 2SPECIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9 3DISASSEMBLY . . . . . . . . . . . . . . . . . . . .
4、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9 4ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16 5TROUBLESHOOTING . . . . . . . . .
5、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-19 For KW-ADV794/KW-AVX740/ KW-AVX746/KW-AVX748 For KW-AVX740E,EE/KW-AVX640E/ KW-AVX746EU/KW-AVX646EU For KW-ADV794/ KW-AVX740/KW-AVX640/ KW-AVX746/KW-AVX646/ KW-AVX648 For KW-ADV794J/K
6、W-AVX640J/ KW-AVX740J/KW-AVX748JW For KW-ADV794J/ KW-AVX740J/ KW-AVX640J RadioFans.CN 收音机爱 好者资料库 1-2 (No.MA493) SPECIFICATION *1 Only for KW-ADV794/KW-AVX748/KW-AVX740 *2 Only for KW-ADV794/KW-AVX740/KW-AVX640. Design and specifications are subject to change without notice. If a kit is necessary for
7、 your car, consult your telephone directory for the nearest car audio speciality shop. KW-ADV794J/KW-AVX748JW/KW-AVX740J/KW-AVX640J AMPLIFIER Power Output20 W RMS 4 Channels at 4 and 1% THD+N Signal-to-Noise Ratio80 dBA (reference: 1 W into 4 ) Load Impedance4 (4 to 8 allowance) Equalizer Control Ra
8、nge Level12 dB Audio Output Level FRONT OUT, REAR OUT, SUBWOOFER OUT Line-Out Level/Impedance4 V/20 k load (full scale) Output Impedance1 k Video Output (composite) VIDEO OUT Color SystemPAL/NTSC Video-Out Level/Impedance1 Vp-p/75 Other TerminalsInputLINE IN, VIDEO IN, CAMERA IN, USB input, MIC IN*1
9、, AUX, Antenna input OthersExpansion port*2, OE REMOTE, RGB input FM/AM TUNER Frequency RangeFMwith channel interval set to 200 kHz 87.9 MHz to 107.9 MHz with channel interval set to 50 kHz 87.5 MHz to 108.0 MHz AMwith channel interval set to 10 kHz 530 kHz to 1 700 kHz with channel interval set to
10、9 kHz531 kHz to 1 611 kHz FM TunerUsable Sensitivity9.3 dBf (0.8 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 Separation40 dB AM TunerSensitivity/Selectivity20 V/40 dB DVD/CD Signal Detection SystemNon
11、-contact optical pickup (semiconductor laser) Frequency ResponseDVD, fs=48 kHz/96 kHz16 Hz to 22 000 Hz VCD/CD16 Hz to 20 000 Hz Dynamic Range93 dB Signal-to-Noise Ratio95 dB Wow and FlutterLess than measurable limit USB USB StandardsUSB 2.0 Full Speed Data Transfer RateFull SpeedMaximum 12 Mbps Low
12、 SpeedMaximum 1.5 Mbps Compatible DeviceMass storage class Compatible File SystemFAT 32/16/12 Max. CurrentDC 5 V 1A BLUETOOTH (Only for KW-ADV794/KW-AVX748/KW-AVX740) VersionBluetooth 2.0 certified Output Power+4 dBm Max. (Power class 2) Service AreaWithin 10 m (10.9 yd) ProfileHFP (Hands-Free Profi
13、le) 1.5 OPP (Object Push Profile) 1.1 A2DP (Advanced Audio Distribution Profile) 1.2 AVRCP (Audio/Video Remote Control Profile) 1.3 PBAP (Phone Book Access Profile) 1.0 MONITOR Screen Size6.1 inch wide liquid crystal display Number of Pixel1 152 000 pixels : 800 (horizontal) 3 (RGB) 480 (vertical) D
14、rive MethodTFT (Thin Film Transistor) active matrix format Color SystemNTSC/PAL Aspect Ratio16:9 (wide) GENERAL Power RequirementOperating VoltageDC 14.4 V (11 V to 16 V allowance) Grounding SystemNegative ground Allowable Storage Temperature-10C to +60C (14F to 140F) Allowable Operating Temperature
15、0C to +40C (32F to 104F) Dimensions (W H D)Installation Size (approx.)182 mm 111 mm 160 mm (7-3/16” 4-3/8” 6-5/16”) Panel Size (approx.)188 mm 117 mm 10 mm (7-7/16” 4-5/8” 7/16”) Mass (approx.)2.3 kg (5.1 lbs) (including the Trim plate and Sleeve) RadioFans.CN 收音机爱 好者资料库 (No.MA493)1-3 * Only for KW-
16、AVX740,KW-AVX746 Design and specifications are subject to change without notice. KW-AVX740E/KW-AVX640E/KW-AVX746EU/KW-AVX646EU AMPLIFIER Maximum Power OutputFront/Rear50 W per channel Continuous Power Output (RMS)Front/Rear20 W per channel into 4 , 40 Hz to 20 000 Hz at no more than 0.8% total harmo
17、nic distortion Load Impedance4 (4 to 8 allowance) Equalizer Control Range Level12 dB Signal-to-Noise Ratio70 dB Audio Output Level FRONT OUT, REAR OUT, SUBWOOFER OUT Line-Out Level/Impedance4 V/20 k load (full scale) Output Impedance1 k Video Output (composite) VIDEO OUT Color SystemPAL/NTSC Video-O
18、ut Level/Impedance1 Vp-p/75 Other TerminalsInputLINE IN, VIDEO IN, CAMERA IN, USB input, MIC IN*, AUX, Aerial input OthersOE REMOTE, RGB input FM/AM TUNER Frequency RangeFM87.5 MHz to 108.0 MHz AM(MW) 531 kHz to 1 611 kHz (LW) 153 kHz to 279 kHz FM TunerUsable Sensitivity9.3 dBf (0.8 V/75 ) 50 dB Qu
19、ieting Sensitivity16.3 dBf (1.8 V/75 ) Alternate Channel Selectivity (400 kHz) 65 dB Frequency Response40 Hz to 15 000 Hz Stereo Separation40 dB MW TunerSensitivity/Selectivity20 V/40 dB LW TunerSensitivity50 V DVD/CD Signal Detection SystemNon-contact optical pickup (semiconductor laser) Frequency
20、ResponseDVD, fs=48 kHz/96 kHz16 Hz to 22 000 Hz VCD/CD16 Hz to 20 000 Hz Dynamic Range93 dB Signal-to-Noise Ratio95 dB Wow and FlutterLess than measurable limit USB USB StandardsUSB 2.0 Full Speed Data Transfer RateFull SpeedMaximum 12 Mbps Low SpeedMaximum 1.5 Mbps Compatible DeviceMass storage cla
21、ss Compatible File SystemFAT 32/16/12 Max. CurrentDC 5 V 1A BLUETOOTH (Only for KW-AVX740A/KW-AVX746) VersionBluetooth 2.0 certified Output Power+4 dBm Max. (Power class 2) Service AreaWithin 10 m ProfileHFP (Hands-Free Profile) 1.5 OPP (Object Push Profile) 1.1 A2DP (Advanced Audio Distribution Pro
22、file) 1.2 AVRCP (Audio/Video Remote Control Profile) 1.3 PBAP (Phone Book Access Profile) 1.0 MONITOR Screen Size6.1 inch wide liquid crystal display Number of Pixel1 152 000 pixels : 800 (horizontal) 3 (RGB) 480 (vertical) Drive MethodTFT (Thin Film Transistor) active matrix format Color SystemPAL/
23、NTSC Aspect Ratio16:9 (wide) GENERAL Power RequirementOperating VoltageDC 14.4 V (11 V to 16 V allowance) Grounding SystemNegative ground Allowable Storage Temperature-10C to +60C Allowable Operating Temperature0C to +40C Dimensions (W H D)Installation Size (approx.)182 mm 111 mm 160 mm Panel Size (
24、approx.)188 mm 117 mm 10 mm Mass (approx.)2.3 kg (including the Trim plate and Sleeve) RadioFans.CN 收音机爱 好者资料库 1-4 (No.MA493) Design and specifications are subject to change without notice. KW-AVX740EE AMPLIFIER Maximum Power OutputFront/Rear50 W per channel Continuous Power Output (RMS)Front/Rear20
25、 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) Equalizer Control Range Level12 dB Signal-to-Noise Ratio70 dB Audio Output Level FRONT OUT, REAR OUT, SUBWOOFER OUT Line-Out Level/Impedance4 V/20 k load (full scale) Output I
26、mpedance1 k Video Output (composite) VIDEO OUT Color SystemPAL/NTSC Video-Out Level/Impedance1 Vp-p/75 Other TerminalsInputLINE IN, VIDEO IN, CAMERA IN, USB input, MIC IN, AUX, Aerial input OthersOE REMOTE, RGB input FM/AM TUNER Frequency RangeFMFM1, FM287.5 MHz to 108.0 MHz FM365.00 MHz to 74.00 MH
27、z AM(MW) 531 kHz to 1 611 kHz (LW) 153 kHz to 279 kHz FM TunerUsable Sensitivity9.3 dBf (0.8 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 Separation40 dB MW TunerSensitivity/Selectivity20 V/40 dB LW Tu
28、nerSensitivity50 V DVD/CD Signal Detection SystemNon-contact optical pickup (semiconductor laser) Frequency ResponseDVD, fs=48 kHz/96 kHz16 Hz to 22 000 Hz VCD/CD16 Hz to 20 000 Hz Dynamic Range93 dB Signal-to-Noise Ratio95 dB Wow and FlutterLess than measurable limit USB USB StandardsUSB 2.0 Full S
29、peed Data Transfer RateFull SpeedMaximum 12 Mbps Low SpeedMaximum 1.5 Mbps Compatible DeviceMass storage class Compatible File SystemFAT 32/16/12 Max. CurrentDC 5 V 1A BLUETOOTH VersionBluetooth 2.0 certified Output Power+4 dBm Max. (Power class 2) Service AreaWithin 10 m ProfileHFP (Hands-Free Prof
30、ile) 1.5 OPP (Object Push Profile) 1.1 A2DP (Advanced Audio Distribution Profile) 1.2 AVRCP (Audio/Video Remote Control Profile) 1.3 PBAP (Phone Book Access Profile) 1.0 MONITOR Screen Size6.1 inch wide liquid crystal display Number of Pixel1 152 000 pixels : 800 (horizontal) 3 (RGB) 480 (vertical)
31、Drive MethodTFT (Thin Film Transistor) active matrix format Color SystemPAL/NTSC Aspect Ratio16:9 (wide) GENERAL Power RequirementOperating VoltageDC 14.4 V (11 V to 16 V allowance) Grounding SystemNegative ground Allowable Storage Temperature-10C to +60C Allowable Operating Temperature0C to +40C Di
32、mensions (W H D)Installation Size (approx.)182 mm 111 mm 160 mm Panel Size (approx.)188 mm 117 mm 10 mm Mass (approx.)2.3 kg (including the Trim plate and Sleeve) (No.MA493)1-5 * Only for KW-AVX746 Design and specifications are subject to change without notice. KW-AVX746A/KW-AVX746U,UT/KW-AVX646U,KW
33、-AVX648UF AMPLIFIER Maximum Power OutputFront/Rear50 W per channel Continuous Power Output (RMS)Front/Rear20 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) Equalizer Control Range Level12 dB Signal-to-Noise Ratio70 dB Audio
34、 Output Level FRONT OUT, REAR OUT, SUBWOOFER OUT Line-Out Level/Impedance4 V/20 k load (full scale) Output Impedance1 k Video Output (composite) VIDEO OUT Color SystemPAL/NTSC Video-Out Level/Impedance1 Vp-p/75 Other TerminalsInputLINE IN, VIDEO IN, CAMERA IN, USB input, MIC IN*, AUX, Aerial input O
35、thersOE REMOTE, RGB input FM/AM TUNER Frequency RangeFM87.5 MHz to 108.0 MHz AM531 kHz to 1 611 kHz FM TunerUsable Sensitivity9.3 dBf (0.8 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 Separation40 dB A
36、M TunerSensitivity/Selectivity20 V/40 dB DVD/CD Signal Detection SystemNon-contact optical pickup (semiconductor laser) Frequency ResponseDVD, fs=48 kHz/96 kHz16 Hz to 22 000 Hz VCD/CD16 Hz to 20 000 Hz Dynamic Range93 dB Signal-to-Noise Ratio95 dB Wow and FlutterLess than measurable limit USB USB S
37、tandardsUSB 2.0 Full Speed Data Transfer RateFull SpeedMaximum 12 Mbps Low SpeedMaximum 1.5 Mbps Compatible DeviceMass storage class Compatible File SystemFAT 32/16/12 Max. CurrentDC 5 V 1A BLUETOOTH (Only for KW-AVX746) VersionBluetooth 2.0 certified Output Power+4 dBm Max. (Power class 2) Service
38、AreaWithin 10 m ProfileHFP (Hands-Free Profile) 1.5 OPP (Object Push Profile) 1.1 A2DP (Advanced Audio Distribution Profile) 1.2 AVRCP (Audio/Video Remote Control Profile) 1.3 PBAP (Phone Book Access Profile) 1.0 MONITOR Screen Size6.1 inch wide liquid crystal display Number of Pixel1 152 000 pixels
39、 : 800 (horizontal) 3 (RGB) 480 (vertical) Drive MethodTFT (Thin Film Transistor) active matrix format Color SystemPAL/NTSC Aspect Ratio16:9 (wide) GENERAL Power RequirementOperating VoltageDC 14.4 V (11 V to 16 V allowance) Grounding SystemNegative ground Allowable Storage Temperature-10C to +60C A
40、llowable Operating Temperature 0C to +40C Dimensions (W H D)Installation Size (approx.)182 mm 111 mm 160 mm 180 mm 100 mm 160 mm (KW-AVX648) Panel Size (approx.)188 mm 117 mm 10 mm Mass (approx.)2.0 kg 1-6 (No.MA493) SECTION 1 PRECAUTION 1.1Safety Precautions (1) This design of this product contains
41、 special hardware and many circuits and components specially for safety purpos- es. For continued protection, no changes should be made to the original design unless authorized in writing by the manufacturer. Replacement parts must be identical to those used in the original circuits. Services should
42、 be per- formed by qualified personnel only. (2) Alterations of the design or circuitry of the product should not be made. Any design alterations of the product should not be made. Any design alterations or additions will void the manufacturers warranty and will further relieve the manufacture of re
43、sponsibility for personal injury or property damage resulting therefrom. (3) Many electrical and mechanical parts in the products have special safety-related characteristics. These characteris- tics are often not evident from visual inspection nor can the protection afforded by them necessarily be o
44、btained by us- ing replacement components rated for higher voltage, watt- age, etc. Replacement parts which have these special safety characteristics are identified in the Parts List of Ser- vice Manual. Electrical components having such features are identified by shading on the schematics and by (
45、) on the Parts List in the Service Manual. The use of a substitute replacement which does not have the same safety charac- teristics as the recommended replacement parts shown in the Parts List of Service Manual may create shock, fire, or other hazards. (4) The leads in the products are routed and d
46、ressed with ties, clamps, tubings, barriers and the like to be separated from live parts, high temperature parts, moving parts and/or sharp edges for the prevention of electric shock and fire hazard. When service is required, the original lead routing and dress should be observed, and it should be c
47、onfirmed that they have been returned to normal, after reassem- bling. (5) Leakage shock hazard testing After reassembling the product, always perform an isola- tion check on the exposed metal parts of the product (an- tenna terminals, knobs, metal cabinet, screw heads, headphone jack, control shaft
48、s, etc.) to be sure the product is safe to operate without danger of electrical shock.Do not use a line isolation transformer during this check. Plug the AC line cord directly into the AC outlet. Using a Leakage Current Tester, measure the leakage current from each exposed metal parts of the cabinet
49、, particular- ly any exposed metal part having a return path to the chassis, to a known good earth ground. Any leakage cur- rent must not exceed 0.5mA AC (r.m.s.). Alternate check method Plug the AC line cord directly into the AC outlet. Use an AC voltmeter having, 1,000 per volt or more sensitivity in the following manner. Connect a 1,500 10W resistor paralleled by a 0.15F AC-type capacitor between an ex- posed metal part and a known good earth ground. Measure the AC voltage across the resistor with the AC voltmeter. Move the re
免费区 
