Yamaha-NXSW-70-Service-Manual电路原理图.pdf

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1、100697 SERVICE MANUAL AV-S70/NX-SW70 AV-S70/NX-SW70 HOME THEATER SYSTEM NX-SW70 is composed of SW-AVS70 and NX-AVS70s. ICONTENTS TO SERVICE PERSONNEL .1 FRONT/REAR PANELS. 12 SPECIFICATIONS .3 DISASSEMBLY PROCEDURES .4 TEST PROGRAM MODE. 56 DSP DIAG MODE . 713 AV-S70 IC DATA . 1420 AV-S70 BLOCK DIAG

2、RAM . 2122 SW-AVS70 BLOCK DIAGRAM .23 AV-S70 PRINTED CIRCUIT BOARD . 2433 SW-AVS70 PRINTED CIRCUIT BOARD . 3435 AV-S70 SCHEMATIC DIAGRAM . 3639 SW-AVS70 SCHEMATIC DIAGRAM.40 PARTS LIST . 4154 REMOTE CONTROL TRANSMITTER.55 IMPORTANT NOTICE This manual has been provided for the use of authorized YAMAH

3、A Retailers and their service personnel. It has been assumed that 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 pr

4、ocedures when servicing this product may result in personal injury, 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 ap

5、pointed service representative. IMPORTANT:The presentation or sale 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

6、 to be accurate and applicable to the unit(s) indicated on the 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 re

7、trofit. Should any discrepancy appear to exist, please contact 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

8、connect to this buss). IMPORTANT:Turn the unit OFF during disassembly and part replacement. Recheck all work before you apply power to the unit. FRONT SPEAKER (AV-S70) SUBWOOFER (SW-AVS70) REAR SPEAKER (NX-AVS70) REAR SPEAKER (NX-AVS70) RadioFans.CN 收音机爱 好者资料库 AV-S70/NX-SW70 AV-S70/NX-SW70 241.2 (91

9、/2) 170 (611/16)41.2 (15/8) 30 (13/16) 600 (235/8) 110 (45/16) 100 (315/16)10 (3/8) M AV-S70 1 ITO SERVICE PERSONNEL Critical Components Information. Components having special characteristics are marked Z and must be replaced with parts having specifications equal to those originally installed. AC L

10、EAKAGE TESTER OR EQUIVALENT EQUIPMENT UNDER TEST INSULATING TABLE WALL OUTLET IFRONT/REAR PANELS RadioFans.CN 收音机爱 好者资料库 AV-S70/NX-SW70 AV-S70/NX-SW70 200.6 (77/8) 40 (13/4) 335 (133/16) 24(15/16) 399 (1511/16) 390.1 (153/8) 5.5 (3/16) 395.6 (159/16) 100 (315/16)20 (13/16) 111.5 (43/8) 140 (51/2) 1.

11、4 (1/16) M SW-AVS70 M NX-AVS70 2 AV-S70/NX-SW70 AV-S70/NX-SW70 3 * TruBass and the symbol are trademarks of SRS Labs, inc. in the United States and selected foreign countries. TruBass technology is incorporated under license from SRS Labs, inc. ISPECIFICATIONS NX-SW70 IAMPLIFIER SECTION Minimum RMS

12、Output Power per Channel Rear (1kHz, 10% THD, 6) .30W + 30W Sub Woofer (100Hz, 10% THD, 4).50W IREAR SPEAKER SECTION (NX-AVS70) Type . Closed cabinet type Speakers . 8cm (3-1/8”) cone (Magnetic-Shielding Type) Maximum Power Handling Capacity.30W Impedance . 6 Dimensions (W X H X D). 100 X 140 X 113m

13、m (3-15/16” X 5-1/2” X 4-7/16”) Weight . 0.7kg (1 lbs. 8 oz) Finish . Gray color ISUB WOOFER SPEAKER SECTION (SW-AVS70) Type . Advanced Active Servo Technology type Speakers . 16cm (6-5/16”) cone (Magnetic-Shielding Type) Maximum Power Handling Capacity.50W Impedance . 4 Dimensions (W X H X D).200 X

14、395 X 399mm (7-7/8” X 15-9/16” X 15-11/16”) Weight . 9.7kg (21 lbs. 6 oz) Finish . Gray color IGENERAL Power Supply . AC230V, 50Hz Power Consumption .80W Accessories . System Cord (DIN plug) X 1 Speaker Cable (15m) X 2 Wall Bracket X 2 Bracket X 2 Wing Bolt X 2 Screw X 2 * Specifications subject to

15、change without notice. AV-S70 IAMPLIFIER SECTION Minimum RMS Output Power per Channel Front (1kHz, 10% THD, 6).30W + 30W Signal to Noise Ratio (IHF-A-Network) TV.85dB Total Harmonic Distortion (1kHz) TV to Speaker Out, 12.5W/6 . 0.08% Input Sensitivity/Impedance TV. 200mV/50k ISPEAKER SECTION Type .

16、 Bass reflex type Speakers . 8cm (3-1/8”) cone x 2 (Magnetic-Shielding Type) Maximum Power Handling Capacity. 30W x 2 Impedance . 6 IGENERAL Power Supply . AC230V, 50Hz Power Consumption.68W Dimensions (W X H X D).600 X110 X 243mm (23-5/8” X 4-5/16” X 9-9/16”) Weight . 7.0kg (15 lbs. 7 oz) Finish .

17、Gray color Accessories .Pin Cord (RCA) X 1 Remote Control Transmitter X 1 Battery (size “AAA”, R03) X 4 Fastener Tape X 2 * Specifications subject to change without notice. Manufactured under license from Dolby Laboratories. Dolby, Dolby Digital, Pro Logic, and the double-D symbol V are trademarks o

18、f Dolby Laboratories. 1992- 1997 Dolby Laboratories. All rights reserved. G . European model B . British model AV-S70/NX-SW70 AV-S70/NX-SW70 4 1. Removal of Grille Assembly. a. Push up the Grille Assembly with a flat tip screwdriver or the like inserted from the bottom. (Fig. 1). b. Keep pushing up

19、the Grille Assembly gradually until it can be removed. *The Grille Assembly is fixed securely at 8 dowels. When removing it, use care not to cause a scratch or any dam- age to the main unit. When reinstalling it, apply quick- drying type bond to the dowels of the Grille Assembly and fit it in place

20、securely. (If it is only pushed in, it will come off easily.) a. Removal of Grille Assembly. a. Push up the Grille Assembly with a flat tip screwdriver or the like inserted from the bottom. (Fig. 3). b. Keep pushing up the Grille Assembly gradually until it can be removed. *The Grille Assembly is fi

21、xed securely at 6 dowels. When removing it, use care not to cause a scratch or any dam- age to the main unit. When reinstalling it, apply quick-dry- ing 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.) ISW-AVS70 DISASSEM

22、BLY PROCEDURES (Remove parts in the order as numbered.) Fig. 1 Grill Assembly q q Amplifier Unit Fig. 2 q e w q Plate Leg Plate Leg 2. Removal of Amplifier Unit a. Remove 4 wing screws (q) and then remove the Plate Legs (right and left). (Fig. 2) b. Remove 4 screws (w). (Fig. 2) c. Remove 7 screws (

23、e) and then remove the Amplifier Unit. (Fig. 2) *Arrow marks are printed to identify the screws to be re- moved. 2. Removal of Amplifier Unit a. Remove 14 screws (r) and then remove the Amplifier Unit. (Fig. 4) *Arrow marks are printed to identify the screws to be re- moved. Fig. 3 Fig. 4 Grill Asse

24、mbly r Amplifier Unit Bottom IAV-S70 DISASSEMBLY PROCEDURES (Remove parts in the order as numbered.) AV-S70/NX-SW70 AV-S70/NX-SW70 5 ITEST PROGRAM MODE (AV-S70) 1. Procedure for starting Test Program With the power turned off, press the POWER key while pressing the VOLUME key and the DSP key simulta

25、neously. This initiates the Test Program function. When the Test Program is initiated, “01 DEST-Ex” appears on the FL display. 2. Procedure for selecting and executing Test Program Using the VOLUME + (UP) key and Volume - (DOWN) key, select the Test Program and then press the INPUT key to execute it

26、. 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. b. Select the Test Program “01 DEST-Ex” and press the INPUT key for execution. (The normal mode will be restored.) 4. Details o

27、f the Test Program function Display 01 DEST-B,G1 Function Destination display/ test program end Destination display J:JaJ (Japanese) J:EnJ (English) B,G1B, G models 02 FL+CLEAR FL display segments all light up / BACKUP RAM CLEAR 1st time: FL display segments all light up and standby LED lights up. 2

28、nd time: RAM CLEAR is executed (RAM CLEAR OK on display) * State before shipped out of the factory preset. 03 FL CHECK FL display light-up check 1st time: FL display segments all light up and standby LED lights up. 2nd time: Even number segments and digits light up. 3rd time: Odd number segments and

29、 digits light up. 1st time2nd time3rd time DSP VDIGITAL ENHANCED VSURROUND VPRO LOGIC VIRTUAL TRUBASS V ENHANCED SURROUND PRO LOGIC TRUBASS AV-S70/NX-SW70 AV-S70/NX-SW70 6 Display 04 DSP Diag Function The DSP DIAG (self-diagnosis) mode is initiated. (Refer to page 7 for the details.) 05 Ver-A1.08 Mi

30、croprocessor version / date display Example of microprocessor display05 Ver-A1.08 Example of microprocessor date display05 99.10.15 What is displayed varies depending on the microprocessor software. 06 SUM47a0 Check sum calculation display / re-calculation 07 PrCan-OFF All protection cancellation fu

31、nction ON/OFF 08 Pr!CPSProtection operation history display / clear C: Center unit amplifier voltage P: Power circuit voltage S: Switch side : Normal x: Abnormal 09 Cors- St.ROM collection (EEPROM) check sum calculation/calculation start When there is a data in the ROM collection area of EEPROM: Exa

32、mple of display09 Cors-288b When there is no data, “NON” appears on the display. *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 is

33、 disconnected. No data is written in the parts mounted on the product as single units. 10 COR-ClearROM collection (EEPROM) data clear / clear start Display is provided only when there is data in the ROM collection area of EEPROM 1st time: Data clear confirmation (Clear-ON? displayed) 2nd time: Data

34、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). Using VOLUME + (UP) key and VOLUME - (DOWN) key, select another test program. *The IC for ROM collection has a r

35、ole to help the microprocessor be upgraded. If the written data is cleared, the old version will be restored. AV-S70/NX-SW70 AV-S70/NX-SW70 7 IDSP DIAG MODE (Self-diagnosis) Use the remote controller supplied as an accessory to select the menu. 1. Procedure for starting DSP DIAG Referring to TEST PR

36、OGRAM MODE in the previous section, select/execute “04 DSP Diag”. When “04 DSP Diag” is executed, the current input name appears on the display followed by “Video” “Sel.1to9 Key”. (The DSP indicator keeps flashing.) 2. Procedure for selecting Main menu and Sub-menu Using 1 through 9 keys on the remo

37、te controller, select the main menu. Soon the sub-menu will appear on the display. Then, select the sub-menu. Every time the selected key (on the remote controller) is pressed, the sub-menu on the display changes. No.Main menu(Display) 1Analog throughAnalog Thr. 2DSP throughDsp Through 3AC-3 through

38、AC-3 Through 4Pro logicPro Logic 5Speakers setSpeakers Set 6Effect offEffect Off 7Manual testManual Test 8No function 9DIAG cancel Sub-menu(Display) MAIN BYPASSA.T.M.Bypass DSP 0dBA.T. DSP 0dB YSS908-SRAMDspT.908SRAM YS908DspT.YSS908 DSP FULL BITDspT.FullBit Status (Binary)AC3 Analo2/0 CENTER LARGEP

39、roL.CenterL EFFECT OFFProL.Eff.Off MAIN : SMALL 0dBSp.MainS 0dB MAIN : LARGE 0dBSp.MainL 0dB LFE/BASS : MAIN CENTER : NONESp.Lfe:M C:N LFE/BASS : MAINSp.LfeBass:M LFE/BASS : SWFRSp.Lfe:Swfr CENTER : NONESp.Cent:None CENTER : SMALL REAR : SMALLSp.Ce:S Re:S EFFECT OFFEffect Off ALLM.Test All MAIN LM.T

40、est Left CENTERM.TestCenter MAIN RM.Test Right REAR RM.Test RearR REAR LM.Test RearL LFEM.Test Lfe 3. Procedure for canceling DIAG There are two methods for cancellation of DIAG. a. Turn off the power by pressing the POWER key of the main unit or the remote controller. b. Press the 9 key of the remo

41、te controller. (The normal mode will be restored.) AV-S70/NX-SW70 AV-S70/NX-SW70 8 Details of DIAG menu 1. Analog Thr. The input is fixed to use the analog (A/D) and has 2 sub-menu items. DSP 0dB The main L/R, C/LFE, RL/RR signals pass through the DSP section. MAIN BYPSS The main L/R signal is outpu

42、t through the analog bypass without passing the DSP section. The main L/R signal passing through the DSP is output through C/LFE and RL/RR. The shaded square means that the element included in it does not operate. AUX IN: 20dBV, Both ch VOLUME:MAX CN102 (Page 30, C-4) MAIN L (1kHz): 20dBV MAIN R (1kHz): 20dBV LFE (30Hz): 34dBV REAR L (1kHz): 26dBV REAR R (1kHz): 26dBV DIR2 CODEC.DA CS4227 YM3436 CODEC.ADAC3Dav(YSS908) CS4227 DECODER 256K SRAM DSP ANALOG IN L/RL/R REAR L REAR R CENTER LFE L/R L/R DIGITAL IN MAIN R MAI