Pioneer-SCLX87-avr-sm电路图 维修手册.pdf

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1、ORDER NO. SC-79 RRV4463 AV RECEIVER SC-79 SC-77 SC-LX87 SC-LX77 THIS MANUAL IS APPLICABLE TO THE FOLLOWING MODEL(S) AND TYPE(S). THIS SERVICE MANUAL SHOULD BE USED TOGETHER WITH THE FOLLOWING MANUAL(S). ModelTypePower RequirementRemarks SC-79CUXJAC 120V SC-77CUXJAC 120V SC-LX87JXJAC 100V SC-LX77JXJA

2、C 100V Model No.Order No.Remarks SC-79, SC-77RRV4451BLOCK DIAGRAM, EXPLODED VIEWS AND PARTS LIST etc. RadioFans.CN 收音机爱 好者资料库 2SC-79 1234 A B C D E F 1234 SAFETY INFORMATION 1. SAFETY PRECAUTIONS The following check should be performed for the continued protection of the customer and service technic

3、ian. LEAKAGE CURRENT CHECK Measure leakage current to a known earth ground (water pipe, conduit, etc.) by connecting a leakage current tester such as Simpson Model 229-2 or equivalent between the earth ground and all exposed metal parts of the appliance (input/output terminals, screwheads, metal ove

4、rlays, control shaft, etc.). Plug the AC line cord of the appliance directly into a 120V AC 60 Hz outlet and turn the AC power switch on. Any current measured must not exceed 0.5 mA. ANY MEASUREMENTS NOT WITHIN THE LIMITS OUTLINED ABOVE ARE INDICATIVE OF A POTENTIAL SHOCK HAZARD AND MUST BE CORRECTE

5、D BEFORE RETURNING THE APPLIANCE TO THE CUSTOMER. 2. PRODUCT SAFETY NOTICE Many electrical and mechanical parts in the appliance have special safety related characteristics. These are often not evident from visual inspection nor the protection afforded by them necessarily can be obtained by using re

6、placement components rated for voltage, wattage, etc. Replacement parts which have these special safety characteristics are identified in this Service Manual. Electrical components having such features are identified by marking with a on the schematics and on the parts list in this Service Manual. T

7、he use of a substitute replacement component which does not have the same safety characteristics as the PIONEER recommended replacement one, shown in the parts list in this Service Manual, may create shock, fire, or other hazards. Product Safety is continuously under review and new instructions are

8、issued from time to time. For the latest information, always consult the current PIONEER Service Manual. A subscription to, or additional copies of, PIONEER Service Manual may be obtained at a nominal charge from PIONEER. Leakage current tester Reading should not be above 0.5 mA Device under test Te

9、st all exposed metal surfaces Also test with plug reversed (Using AC adapter plug as required) Earth ground AC Leakage Test (FOR USA MODEL ONLY) WARNING This product contains lead in solder and certain electrical parts contain chemicals which are known to the state of California to cause cancer, bir

10、th defects or other reproductive harm. 56 noi t isoporP - 6.94252 no i t ceS edoC ytefaS it is not meant for the casual do-it- yourselfer. Qualified technicians have the necessary test equipment and tools, and have been trained to properly and safely repair complex products such as those covered by

11、this manual. Improperly performed repairs can adversely affect the safety and reliability of the product and may void the warranty. If you are not qualified to perform the repair of this product properly and safely, you should not risk trying to do so and refer the repair to a qualified service tech

12、nician. RadioFans.CN 收音机爱 好者资料库 3SC-79 5678 5678 A B C D E F CONTENTS SAFETY INFORMATION.2 10. SCHEMATIC DIAGRAM.6 10.1 OVERALL WIRING DIAGRAM .6 10.2 AUDIO ASSY (1/4).8 10.3 AUDIO ASSY (2/4).10 10.4 AUDIO ASSY (3/4).12 10.5 AUDIO ASSY (4/4).14 10.6 DAC HIGH ASSY (1/3) .16 10.7 DAC HIGH ASSY (2/3) .

13、18 10.8 DAC HIGH ASSY (3/3) .20 10.9 FRONT HDMI USB ASSY .22 10.10 USB RECT ASSY.24 10.11 USB DAC ASSY (SC-79).26 10.12 HDBT ASSY (SC-79).28 10.13 DIGITAL MAIN ASSY (1/14).30 10.14 DIGITAL MAIN ASSY (2/14).32 10.15 DIGITAL MAIN ASSY (3/14).34 10.16 DIGITAL MAIN ASSY (4/14).36 10.17 DIGITAL MAIN ASSY

14、 (5/14).38 10.18 DIGITAL MAIN ASSY (6/14).40 10.19 DIGITAL MAIN ASSY (7/14).42 10.20 DIGITAL MAIN ASSY (8/14).44 10.21 DIGITAL MAIN ASSY (9/14).46 10.22 DIGITAL MAIN ASSY (10/14) .48 10.23 DIGITAL MAIN ASSY (11/14) .50 10.24 DIGITAL MAIN ASSY (12/14) .52 10.25 DIGITAL MAIN ASSY (13/14) .54 10.26 DIG

15、ITAL MAIN ASSY (14/14) .56 10.27 INTERFACE ASSY.58 10.28 COMPONENT ASSY (1/3) .60 10.29 COMPONENT ASSY (2/3) .62 10.30 COMPONENT ASSY (3/3) .64 10.31 COMPOSITE ASSY.66 10.32 MIC HP ASSY.68 10.33 DISPLAY ASSY (1/2).70 10.34 DISPLAY ASSY (2/2).72 10.35 VOL ASSY.74 10.36 POWER SW ASSY and ENCODER ASSY

16、.75 10.37 IR BUFFER ASSY .76 10.38 BUFFER GND ASSY and IR INTERFACE_M ASSY.78 10.39 D AMP ASSY (1/9) .80 10.40 D AMP ASSY (2/9) .82 10.41 D AMP ASSY (3/9) .84 10.42 D AMP ASSY (4/9) .86 10.43 D AMP ASSY (5/9) .88 10.44 D AMP ASSY (6/9) .90 10.45 D AMP ASSY (7/9) .92 10.46 D AMP ASSY (8/9) .94 10.47

17、D AMP ASSY (9/9) .96 10.48 PRIMARY ASSY (1/2).98 10.49 PRIMARY ASSY (2/2).100 10.50 PRIMARY SHIELD ASSY (SC-77) and REG ASSY.102 10.51 IR REG ASSY.104 10.52 B DIODE ASSY .106 10.53 CONNECT ASSY .107 10.54 FB CONNECT ASSY.108 10.55 PRE BRIDGE ASSY.109 10.56 A-DAC BRIDGE ASSY .110 10.57 D-AUDIO BRIDGE

18、 ASSY .111 10.58 D-DAC BRIDGE ASSY .112 10.59 FRONT BRIDGE ASSY.113 10.60 DISPLAY BRIDGE ASSY.114 10.61 F-IN BRIDGE ASSY .115 10.62 A REG BRIDGE ASSY.116 RadioFans.CN 收音机爱 好者资料库 4SC-79 1234 A B C D E F 1234 10.63 FAN CONNECT, MIC HP GUARD, BIND DM CABLE, HDBT BIND2 (SC-79), BIND B CABLE and FFC GUARD2 ASSYS.117 10.64 VREG GUARD ASSY, PANEL GUARD ASSY and HDBT BIND1 ASSY (SC-79).118 10.65 MULTI CH IN ASSY (SC-LX87) .119 10.66 MCH BRIDGE ASSY (SC-LX87).120 11. PCB CONNECTION DIAGRAM .