Yamaha-AVS-77-Service-Manual电路原理图.pdf

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1、SERVICE MANUAL HOME THEATER SYSTEM 100775 P.O.Box 1, Hamamatsu, Japan I CONTENTS TO SERVICE PERSONNEL . 1 FRONT/REAR PANEL . 12 SPECIFICATIONS. 34 INTERNAL VIEW (AV-S77C) . 4 DISASSEMBLY PROCEDURES . 56 P.C.B. OPERATION CHECK. 6 TEST PROGRAM MODE . 79 DSP DIAG MODE (Self-diagnosis) . 916 IC DATA . 1

2、723 DISPLAY DATA . 24 BLOCK DIAGRAM. 2529 PRINTED CIRCUIT BOARD . 3041 SCHEMATIC DIAGRAM . 4246 PARTS LIST. 4759 REMOTE CONTROL TRANSMITTER . 60 AV-S77 AV-S77 IMPORTANT NOTICE This manual has been provided for the use of authorized YAMAHA Retailers and their service personnel. It has been assumed th

3、at basic service procedures inherent to the industry, and more specifically YAMAHA Products, are already known and understood by the users, and have therefore not been restated. WARNING:Failure to follow appropriate service and safety procedures when servicing this product may result in personal inj

4、ury, destruction of expensive components, and failure of the product to perform as specified. For these reasons, we advise all YAMAHA product owners that any service required should be performed by an authorized YAMAHA Retailer or the appointed service representative. IMPORTANT:The presentation or s

5、ale of this manual to any individual or firm does not constitute authorization, certification or recognition of any applicable technical capabilities, or establish a principle-agent relationship of any form. The data provided is believed to be accurate and applicable to the unit(s) indicated on the

6、cover. The research, engineering, and service departments of YAMAHA are continually striving to improve YAMAHA products. Modifications are, therefore, inevitable and specifications are subject to change without notice or obligation to retrofit. Should any discrepancy appear to exist, please contact

7、the distributors Service Division. WARNING:Static discharges can destroy expensive components. Discharge any static electricity your body may have accumulated by grounding yourself to the ground buss in the unit (heavy gauge black wires connect to this buss). IMPORTANT:Turn the unit OFF during disas

8、sembly and part replacement. Recheck all work before you apply power to the unit. The AV-S77 is composed of the AV-S77C, the NX-SW77 and the NX-S77E. FRONT SPEAKER (AV-S77C) SUBWOOFER (NX-SW77) REAR SPEAKER (NX-S77E) REAR SPEAKER (NX-S77E) RadioFans.CN 收音机爱 好者资料库 AV-S77 AV-S77 1 WALL OUTLET EQUIPMEN

9、T UNDER TEST AC LEAKAGE TESTER OR EQUIVALENT INSULATING TABLE WARNING: CHEMICAL CONTENT NOTICE! The solder used in the production of this product contains LEAD. In addition, other electrical/electronic and /or plastic (where applicable) components may also contain traces of chemicals found by the Ca

10、lifornia Health and Welfare Agency (and possibly other entities) to cause cancer and/or birth defects or other reproductive harm. DO NOT PLACE SOLDER, ELECTRICAL/ELECTRONIC OR PLASTIC COMPONENTS IN YOUR MOUTH FOR ANY REA- SON WHATSOEVER! Avoid prolonged, unprotected contact between solder and your s

11、kin! When soldering, do not inhale solder fumes or expose eyes to solder/flux vapor! If you come in contact with solder or components located inside the enclosure of this product, wash your hands before handling food. I TO SERVICE PERSONNEL 1. Critical Components Information Components having specia

12、l characteristics are marked s and must be replaced with parts having specifications equal to those originally installed. 2. Leakage Current Measurement (For 120V Models Only) When service has been completed, it is imperative to verify that all exposed conductive surfaces are properly insulated from

13、 supply circuits. GMeter impedance should be equivalent to 1500 ohm shunted by 0.15F. GLeakage current must not exceed 0.5mA. GBe sure to test for leakage with the AC plug in both polarities. I FRONT/REAR PANEL M AV-S77C RadioFans.CN 收音机爱 好者资料库 AV-S77 AV-S77 2 M REMOTE CONTROL TRANSMITTER M NX-S77E

14、M NX-SW77 AV-S77 AV-S77 3 I SPECIFICATIONS AMPLIFIER SECTION Maximum Output Power Front (1kHz, 10 % THD, 6) .25W + 25W Rear (1kHz, 10 % THD, 6) .25W + 25W Subwoofer (100Hz, 10 % THD, 5) . 50W Signal to Noise Ratio (IHF-A, AUX) . 95dB Total Harmonic Distortion (AUX, 1kHz, 12.5W/6) .0.05% Input Sensit

15、ivity / Impedance (AUX) . 200mV / 50k FRONT SPEAKER SECTION (AV-S77C) Type. Bass Reflex Driver . 8cm Cone x 2, Magnetic Shielding Type Nominal Input Power. 30W Impedance . 6 Frequency Response .120Hz 20kHz REAR SPEAKER SECTION (NX-S77E) Type.Acoustic Suspension Driver .8cm Cone, Magnetic Shielding T

16、ype Nominal Input Power. 30W Impedance . 6 Frequency Response .140Hz 20kHz SUBWOOFER SECTION (NX-SW77) Type. Advanced YAMAHA Active Servo Technology Driver .16cm Cone, Magnetic Shielding Type Frequency Response .30Hz 200Hz GENERAL Power Supply B, G models .AC 230V 50Hz Power Consumption . 120W Stand

17、by Power Consumption . about 1W Max. Dimensions (W x H x D) AV-S77C .600 x 110 x 220 mm (23-5/8 x 4-5/16 x 8-11/16) NX-SW77 .176 x 405 x 433 mm (6-15/16 x 16 x 17-1/16) NX-S77E .100 x 140 x 112 mm (3-15/16 x 5-1/2 x 4-3/8) Weight AV-S77C .5.0kg (11 lbs.) NX-SW77 . 11.0kg (24 lbs. 4 oz.) NX-S77E . 0.

18、8kg (1 lbs. 12 oz.) Accessories Remote Controller, Batteries (R6P) x 2, Audio Connection Cord (2 pin, 3 m) x 1, System Connector Cable (8 pin, 3m) x 1, System Connector Cable (13 pin, 3m) x 1, Speaker Cords (Rear: 15m, Front: 3m) x 1, Velcro Strips x 2 sets, Speaker Mounting brackets (Type A) x 2, S

19、peaker Mounting brackets (Type B) x 2, Screw x 2, Wing Nuts x 2, Connection Guide * Specifications are subject to change without notice due to product improvements. B . British model G . European model Manufactured under license from Dolby Laboratories. “Dolby”, “Pro Logic” and the double-D symbol a

20、re trademarks of Dolby Laboratories. “DTS” and“ DTS Digital Surround” are registered trademarks of Digital Theater Systems, Inc. M AV-S77C Dimensions 20 (13/16) 600 (23-5/8) 220 (8-11/16) 200 (7-7/8)100 (3-15/16) 110 (4-5/16) Unit: mm (inch) 10 (3/8) AV-S77 AV-S77 4 M NX-S77E Dimensions M NX-SW77 Di

21、mensions 100 (3-15/16) 140 (5-1/2) 112 (4-3/8) Unit: mm (inch) 70 (2-3/4) Unit: mm (inch) 435 (17-1/8) 433 (17-1/16)176 (6-15/16) 400 (15-3/4) 405 (16) 5 (3/16) I INTERNAL VIEW (AV-S77C) 1 MAIN P.C.B. 2 DSP P.C.B. 3 OPERATION P.C.B. 12 3 AV-S77 AV-S77 4 4 4 4 4 DSP Unit CB2 CN304 CN305 CB3 1 Bottom

22、OPERATION P.C.B. 2 2 1 11 1 1 Grill Assy 3 3 3 Amplifier Unit 5 I DISASSEMBLY PROCEDURES (Remove parts in the order as numbered.) Disconnect the power cord from the AC outlet. AV-S77C Disassembly procedures 1. Removal of Grille Assy a. Insert a flat tip screwdriver or the like from the bottom of the

23、 Grille Assembly. b. Push up the Grille Assembly with the screwdriver gradually until it can be removed from the main unit. (Fig. 1). *The Grille Assembly is fixed securely at 8 dowels. When removing it, use care not to cause a scratch or any damage to the main unit. When reinstalling it, apply quic

24、k-drying type bond to the dowels of the Grille Assembly and fit it in place securely. (If it is only pushed in, it will come off easily.) c. Remove 8 screws (1). The OPERTION P.C.B. can then be removed from the Grille Assembly. (Fig. 1) 2. Removal of Amplifier Unit a. Remove 6 screws (2). (fig. 1) b

25、. Remove 7 screws (3) and take out the Amplifier Unit and OPERATION P.C.B. in the arrow direction. (Fig. 2) c. Remove the connectors CN304 and CN305. (Fig. 3) 3. Removal of DSP Unit a. Remove the connectors CB2 and CB3. (Fig. 3) b. Remove 8 screws (4). The DSP Unit can then be removed. (Fig. 3) Fig.

26、 1 Fig. 2 Fig. 3 AV-S77 AV-S77 5 5 5 5 Amplifier Unit T Grille Assy 6 NX-SW77 Disassembly procedures 1. Removal of Grille Assy a. Push up the Grille Assembly with a flat tip screwdriver or the like inserted from the bottom. (Fig. 4). b. Keep pushing up the Grille Assembly gradually until it can be r

27、emoved. *The Grille Assembly is fixed securely at 6 dowels. When removing it, use care not to cause a scratch or any damage to the main unit. When reinstalling it, apply quick-drying type bond to the dowels of the Grille Assembly and fit it in place securely. (If it is only pushed in, it will come o

28、ff easily.) 2. Removal of Amplifier Unit Remove 12 screws (5) and then remove the Amplifier Unit. (Fig. 5) I P.C.B. OPERATION CHECK a. Remove the Amplifier Unit, referring to Disassembly procedures described above. b. Remove each P.C.B as required. c. Connect all the connectors between P.C.B.s as co

29、nnected originally. d. Using 2 DIN cables, connect the AV-S77C and the NX- SW77. e. Connect the power cord of the NX-SW77 to the AC power outlet and turn on the power. DIN Cable (Black) AV-S77C NX-SW77 DIN Cable (White) Fig. 4 Fig. 5 AV-S77 AV-S77 7 I TEST PROGRAM MODE 1. Procedure for starting Test

30、 Program With the power plug disconnected from the outlet, reconnect it to the outlet while pressing the VOLUME key and the DSP key simultaneously, and the Test Program will be activated. When the Test Program is activated, “01 DEST-Ex” is displayed. 2. Procedure for selecting and executing Test Pro

31、gram Using the VOLUME + (UP) key and the Volume - (DOWN) key, select the Test Program and then press the INPUT key to execute it. 3. Procedure for canceling Test Program There are two methods for cancellation. a. Turn off the power by pressing the POWER key of the main unit or the remote controller.

32、 b. Select the Test Program “01 DEST-Ex” and press the INPUT key for execution. (The normal mode will be restored.) 4. Details of the Test Program function Display 01 DEST-B,G1 Function Destination display/ test program end Destination display J:Ja.J (Japanese) B,G1.B, G models 03 FL+CLEAR FL displa

33、y segments all light up / BACKUP RAM CLEAR 1st time: FL display segments all light up and standby LED lights up. 2nd time: RAM CLEAR is executed (RAM CLEAR OK on display) * State before shipped out of the factory preset. 04 FL CHECK FL display light-up check 1st time: FL display segments all light u

34、p and standby LED lights up. 2nd time: Even number segments and digits light up. 3rd time: Odd number segments and digits light up. 1st time2nd time3rd time 02 Fact.Test Factory test mode This test mode is used for factory inspection before shipping and is not usually used. If the test program has b

35、een executed, it is not possible to shift to another test program. In such case, cancel the test program. AV-S77 AV-S77 8 Display 05 DSP Diag Function The DSP DIAG (self-diagnosis) mode is activated. (Refer to next page for the details.) 06 Ver-1.02 Microprocessor version / date display Example of m

36、icroprocessor display05 Ver-1.02 Example of microprocessor date display05 01.06.07 What is displayed varies depending on the microprocessor software. 07 SUM39ba Check sum calculation display / re-calculation 09 PrCan-OFF All protection cancellation function ON/OFF *1 10 Pr! PSProtection operation hi

37、story display / clear P: Power circuit voltage S: NX-SW77 side : Normal x: Abnormal 11 RemoCorrRROM collection (EEPROM) remote control data reception / data write This test mode is not usually used. 12 COR-ClearROM collection (EEPROM) data clear / clear start Display is provided only when there is d

38、ata in the ROM collection area of EEPROM 1st time: Data clear confirmation (Clear-ON? displayed) 2nd time: Data clear execution (Clear:OK! displayed) After “Clear-ON?Clear-ON?Clear-ON?Clear-ON?Clear-ON?” is displayed, do not use INPUT key for execution (because the program contents will be erased).

39、Using VOLUME + (UP) key and VOLUME - (DOWN) key, select another test program. *The IC for ROM collection has a role to help the microprocessor be upgraded. If the written data is cleared, the old version will be restored. 08 ROM Check Dont use this mode (item). (Its correct operation is not availabl

40、e.) *1CAUTION: Using this product with the protection function cancelled may cause damage to itself. Use special care for this point when using this mode. AV-S77 AV-S77 9 Display 13 Cors- St. Function ROM collection (EEPROM) check sum calculation/calculation start This message is displayed only when

41、 data exists in the ROM correction area of EEPROM. Example of display13 Cors-288b *The ROM collection (EEPROM) is utilized to cope with the data area for backup and microprocessor bugs partially. The backup memory for the sound field or the like will be retained semi-permanently even when the plug i

42、s disconnected. No data is written in the parts mounted on the product as single units. I DSP DIAG MODE (Self-diagnosis) 1. Procedure for starting DSP DIAG Referring to TEST PROGRAM MODE in the previous section, select/execute “05 DSP Diag”. When “05 DSP Diag” is executed, the current input name is displayed followed by “Push DSP Key”. (The DSP indicator keeps blinking.) When the DSP key is pressed next, Analog Thr. of the main menu is displayed followed by A.T.M. Bypass of the sub-menu. 2. Procedure for selecting Main menu and Sub-menu To change the main menu item,