Denon-AVR791-avr-sm维修电路原理图.pdf

《Denon-AVR791-avr-sm维修电路原理图.pdf》由会员分享，可在线阅读，更多相关《Denon-AVR791-avr-sm维修电路原理图.pdf（147页珍藏版）》请在收音机爱好者资料库上搜索。

1、D&M Holdings Inc. SERVICE MANUAL e e Copyright 2010 D&M Holdings Inc. All rights reserved. WARNING: Violators will be prosecuted to the maximum extent possible. MODELJPE3E2EKEAE1E1KE1C AVR-1911 s ? AVR-791? AV SURROUND RECEIVER Ver. 4 Some illustrations using in this service manual are slightly diff

2、erent from the actual set. Please use this service manual with referring to the operating instructions without fail. For purposes of improvement, specifi cations and design are subject to change without notice. S0088-1V04DM/DG1009 s Please refer to the MODIFICATION NOTICE. RadioFans.CN 收音机爱 好者资料库 2

3、SAFETY PRECAUTIONS The following check should be performed for the continued protection of the customer and service technician. LEAKAGE CURRENT CHECK Before returning the unit to the customer, make sure you make either (1) a leakage current check or (2) a line to chassis resistance check. if the lea

4、kage current exceeds 0.5 milliamps, or if the resistance from chassis to either side of the power cord is less than 460 kohms, the unit is defective. Be sure to test for leakage current with the AC plug in both polarities, in addition, in each power ON, OFF and STANDBY mode, if applicable. CAUTION P

5、lease heed the points listed below during servicing and inspection. Heed the cautions! Spots requiring particular attention when servicing, such as the cabinet, parts, chassis,etc., have cautions indicated on labels. be sure to heed these causions and the cautions indicated in the handling instructi

6、ons. Caution concerning electric shock! (1) An AC voltage is impressed on this set, so touching internal metal parts when the set is energized could cause electric shock. Take care to avoid electric shock, by for example using an isolating transformer and gloves when servicing while the set is energ

7、ized, unplugging the power cord when replacing parts, etc. (2) Tere are high voltage parts inside. Handle with extra care when the set is energized. Caution concerning disassembly and assembly! Through great care is taken when manufacturing parts from sheet metal, there may in some rare cases be bur

8、rs on the edges of parts which could cause injury if fi ngers are moved across them. Use gloves to protect your hands. Only use designated parts! The sets parts have specific safety properties (fire resistance, voltage resistance, etc.). For replacement parts, be sure to use parts which have the sam

9、e poroperties. In particular, for the important safety parts that are marked z on wiring diagrams and parts lists, be sure to use the designated parts. Be sure to mount parts and arrange the wires as they were originally! For safety seasons, some parts use tape, tubes or other insulating materials,

10、and some parts are mounted away from the surface of printed circuit boards. Care is also taken with the positions of the wores omsode amd clamps are used to keep wires away from heating and high voltage parts, so be sure to set everything back as it was originally. Inspect for safety after servicing

11、! Check that all screws, parts and wires removed or disconnected for servicing have been put back in their original positions, inspect that no parts around the area that has been serviced have been negatively affected, conduct an inslation check on the external metal connectors and between the blade

12、s of the power plug, and otherwise check that safety is ensured. (Insulation check procedure) Unplug the power cord from the power outlet, disconnect the antenna, plugs, etc., and turn the power switch on. Using a 500V insulation resistance tester, check that the inplug and the externally exposed me

13、tal parts (antenna terminal, headphones terminal, input terminal, etc.) is 1M or greater. If it is less, the set must be inspected and repaired. Many of the electric and structural parts used in the set have special safety properties. In most cases these properties are difficult to distinguish by si

14、ght, and using replacement parts with higher ratings (rated power and withstand voltage) does not necessarily guarantee that safety performance will be poreserved. Parts with safety properties are indicated as shown below on the wiring diagrams and parts lists is this service manual. Be sure to repl

15、ace them with parts with the designated part number. (1) Schematic diagrams .Indicated by the z mark. (2) Parts lists .Indicated by the z mark. Using parts other than the designated parts could result in electric shock, fi res or other dangerous situations. CAUTION Concerning important safety parts

16、RadioFans.CN 收音机爱 好者资料库 3 NOTE FOR SCHEMATIC DIAGRAM WARNING: Parts marked with this symbol z have critical characteristics. Use ONLY replacement parts recommended by the manufacturer. CAUTION: Before returning the unit to the customer, make sure you make either (1) a leakage current check or (2) a

17、line to chassis resistance check. If the leakage current exceeds 0.5 milliamps, or if the resistance from chassis to either side of the power cord is less than 460 kohms, the unit is defective. WARNING: DO NOT return the unit to the customer until the problem is located and corrected. NOTICE: ALL RE

18、SISTANCE VALUES IN OHM. k=1,000 OHM / M=1,000,000 OHM ALL CAPACITANCE VALUES IN MICRO FARAD. P=MICRO-MICRO FARAD EACH VOLTAGE AND CURRENT ARE MEASURED AT NO SIGNAL INPUT CONDITION. CIRCUIT AND PARTS ARE SUBJECT TO CHANGE WITHOUT PRIOR NOTICE. Parts for which nsp is indicated on this table cannot be

19、supplied. When ordering of part, clearly indicate 1 and I (i) to avoid mis-supplying. Ordering part without stating its part number can not be supplied. Not including General-purpose Carbon Chip Resistor in the P.W.Board parts list. (Refer to the Schematic Diagram for those parts.) Parts marked with

20、 this symbol z have critical characteristics. Use ONLY replacement parts recommended by the manufacturer. Not including General-purpose Carbon Film Resistor in the P.W.Board parts list. (Refer to the Schematic Diagram for those parts.) Part indicated with the mark is not illustrated in the exploded

21、view. WARNING: 1. 2. 3. 4. 5. 6. Resistors RD:Carbon RC:Composition RS :Metal oxide film RW:winding RN:Metal film RK :Metal mixture P:Pulse-resistant type NL :Low noise type NB :Non-burning type FR :Fuse-resistor F:Lead wire forming 2B :1/8 W 2E :1/4 W 2H :1/2 W 3A :1 W 3D :2 W 3F :3 W 3H :5 W F:1%

22、G:2% J:5% K:10% M :20% Ex.:RN Type 14K Shape and per- formance 2E Power 182 Resist- ance G Allowable error FR Others * Resistance 1800ohm=1.8kohm1 82 Indicates number of zeros after effective number. 2-digit effective number. 1.2ohm1 R2 2-digit effective number, decimal point indicated by R. 1-digit

23、 effective number. : Units: ohm Capacitors CE :Aluminum foil electrolytic CA :Aluminium solid electrolytic CS :Tantalum electrolytic CQ:Film CK :Ceramic CC:Ceramic CP :Oil CM:Mica CF :Metallized CH:Metallized HS :High stability type BP :Non-polar type HR:Ripple-resistant type DL :For change and disc

24、harge HF :For assuring high requency U:UL part C:CSA part W :UL-CSA part F:Lead wire forming 0J :6.3 V 1A :10 V 1C :16 V 1E :25 V 1V :35 V 1H :50 V 2A :100 V 2B :125 V 2C :160 V 2D :200 V 2E :250 V 2H :500 V 2J :630 V F:1% G:2% J:5% K:10% M :20% Z:80% :- 20% P:+100% C:0.25pF D:0.5pF =:Others Ex.:CE

25、Type 04W Shape and per- formance 1H Dielectric strength 3R2 Capacity M Allowable error BP Others Units:F. 2200F2 22 Indicates number of zeros after effective number. 2-digit effective number. Units:F. 2.2F2 R2 2-digit effective number, decimal point indicated by R 1-digit effective number. *Capacity

26、 (electrolyte only) When the dielectric strength is indicated in AC,AC is included after the dieelectric strength value. *Capacity (except electrolyte) Units:pF 2200pF=0.0022F2 22 Indicates number of zeros after efective number. (More than 2) 2-digit effective number. Units:pF 220pF2 21 2-digit effe

27、ctive number. Indicates number of zeros after effective numver. (0 or 1) NOTE FOR PARTS LIST 4 TECHNICAL SPECIFICATIONS s n Audio Section Power amplifi er Rated output : Front : 90 W + 90 W (8 , 20 Hz 20 kHz with 0.08 % T.H.D.) 125 W + 125 W (6 , 1 kHz with 0.7 % T.H.D.) 140W+140W(6 , JEITA) Center

28、: 90 W (8 , 20 Hz 20 kHz with 0.08 % T.H.D.) 125 W (6 , 1 kHz with 0.7 % T.H.D.) 140W(6 , JEITA) Surround : 90 W + 90 W (8 , 20 Hz 20 kHz with 0.08 % T.H.D.) 125 W + 125 W (6 , 1 kHz with 0.7 % T.H.D.) 140W+140W(6 , JEITA) Surround back: 90 W + 90 W (8 , 20 Hz 20 kHz with 0.08 % T.H.D.) 125 W + 125

29、W (6 , 1 kHz with 0.7 % T.H.D.) 140W+140W(6 , JEITA) Output connectors : 6 16 Analog Input sensitivity/Input impedance : 200 mV/47 k Frequency response: 10 Hz 100 kHz +1, 3 dB (DIRECT mode) S/N : 100 dB (IHFA weighted, DIRECT mode) n Video Section Standard video connectors Input/output level and imp

30、edance : 1 Vp-p, 75 Frequency response : 5 Hz 10 MHz +1, 3 dB n HD Radio section (for 1911E3) FM(Note: V at 75 , 0 dBf = 1 x 1015 W) Receiving Range : FM 87.5 MHz 107.9 MHz AM530 kHz 1710 kHz Usable Sensitivity : FM1.5 V (14.8 dBf) AM20 V S/N (IHF-A) : FMMONO 78 dB AM STEREO 68 dB HD 85 dB 85 dB Tot

31、al harmonic Distortion (at 1 kHz) : FMMONO 0.1 % AM STEREO 0.2 % HD 0.02 % 0.02 % n Tuner section (for 1911E2,1911E1C,791E3,791EA) FM(Note: V at 75 , 0 dBf = 1 x 1015 W) Receiving Range (for 791E3) : FM 87.5 MHz 107.9 MHz AM520 kHz 1710 kHz Receiving Range (for 1911E2,1911E1C,791EA) : FM 87.5 MHz 10

32、8.0 MHz AM522 kHz 1611 kHz Usable Sensitivity : FM1.2 V (12.8 dBf) AM18 V 50 dB Quieting Sensitivity (for 791E3) : FMMONO 2.8 V (20.2 dBf) 50 dB Quieting Sensitivity (for 1911E2,1911E1C,791EA) : FMMONO 2.0 V (17.3 dBf) STEREO 42 V (34.5 dBf) S/N (IHF-A) (for 791E3) : FMMONO 70 dB STEREO 67 dB S/N (I

33、HF-A) (for 1911E2,1911E1C,791EA) : FMMONO 72 dB STEREO 67 dB Total harmonic Distortion (at 1 kHz) (for 791E3) : FMMONO 0.7 % STEREO 1.0 % Total harmonic Distortion (at 1 kHz) (for 1911E2,1911E1C,791EA) : FMMONO 0.3 % STEREO 0.7 % n General Power supply : AC 120 V, 60 Hz (for 1911E3,791E3) AC 230 V,

34、50 Hz (for 1911E2,791EA) AC 220 V, 50 Hz (for 1911E1C) Power consumption : 460 W 0.1 W (Standby) 3 W (CEC standby) Maximum external dimensions : 434 (W) x 171 (H) x 381 (D) mm Weight : 10.2 kg n Remote Control Unit (RC-1146) Batteries : R6/AA Type (two batteries) Maximum external dimensions : 53 (W)

35、 x 224 (H) x 28 (D) mm Weight : 160 g (including batteries) 266 44.2 16155 171 20.721.454.7 214.5 338.9 381 34.5102 344 434 18.5 DIMENSION The illustration is AVR-791 E3 model. 5 CAUTION IN SERVICING Initializing AV SURROUND RECEIVER AV SURROUND RECEIVER initialization should be performed when the c

36、om, peripheral parts of com, and Digital P.W.B. are replaced. 1. Turn off the power using ON/STANDBY button. 2. Press ON/STANDBY button while simultaneously pressing SURROUND MODE 0 and SURROUND MODE 1 buttons. 3. Check that the entire display is fl ashing with an interval of about 1 second, and rel

37、ease your fi ngers from the 2 buttons and the microprocessor will be initialized. Service Jigs When you repair the printing board, you can use the following JIG (Extension cable kit). Please order to Denon Offi cial Service Distributor in your region if necessary. 8U-110084S : EXTENSION UNIT KIT : 1

38、 Set s (Refer to 20 page) When you update the fi rmware, you can use the following JIG (RS232C to internal connector conversion adapter with 4P FFC cable kit ). s Please order to Denon Offi cial Service Distributor in your region if necessary. 8U-210100S : WRITING KIT : 1 Set (Refer to 22 page) Note

39、: If step 3 does not work, start over from step 1. All user settings will be lost and this factory setting will be recovered when this initialization mode. So make sure to memorize your setting for restoring after the initialization. SURROUND MODE 0 SURROUND MODE 1 ON/STANDBY 6 DISASSEMBLY Disassemb

40、le in order of the arrow of the fi gure of following fl ow. In the case of the re-assembling, assemble it in order of the reverse of the following fl ow. In the case of the re-assembling, observe attention of assembling it. If wire bundles are untied or moved to perform adjustment or parts replaceme

41、nt etc., be sure to rearrange them neatly as they were originally bundled or placed afterward. Otherwise, incorrect arrangement can be a cause of noise generation. About the photos used for descriptions in the DISASSEMBLY section. The direction from which the photographs used herein were photographe

42、d is indicated at Direction of photograph: * at the left of the respective photographs. Refer to the table below for a description of the direction in which the photos were taken. Photographs for which no direction is indicated were taken from above the product. The photograph is AVR-791 E3 model. T

43、he viewpoint of each photograph (Photografy direction) View from above Front side Direction of photograph: B Direction of photograph: DDirection of photograph: C Direction of photograph: A FRONT PANEL ASSY Refer to DISASSEMBLY 1. FRONT PANEL ASSY and EXPLODED VIEW PCB FUNCTION (Ref. No. of EXPLODED

44、VIEW : 11) PCB H/P (Ref. No. of EXPLODED VIEW : 14) PCB USB (Ref. No. of EXPLODED VIEW : 21) PCB FRONT (Ref. No. of EXPLODED VIEW : 22) PCB FUNCTION_CNT (Ref. No. of EXPLODED VIEW : 23) TRANS MAIN Refer to DISASSEMBLY 6. TRANS MAIN and EXPLODED VIEW TRANS MAIN (Ref. No. of EXPLODED VIEW : 46) RADIAT

45、OR ASSY Refer to DISASSEMBLY 2. RADIATOR ASSY and EXPLODED VIEW PCB GUIDE_L (Ref. No. of EXPLODED VIEW : 26) PCB TOP_GUIDE (Ref. No. of EXPLODED VIEW : 29) PCB GUIDE_R (Ref. No. of EXPLODED VIEW : 31) PCB 7CH-AMP ASSY (Ref. No. of EXPLODED VIEW : 33) PCB REG CNT/PCB REG Refer to DISASSEMBLY 3. PCB R

46、EG CNT/PCB REG and EXPLODED VIEW PCB REG (Ref. No. of EXPLODED VIEW : 52) PCB REG_CNT (Ref. No. of EXPLODED VIEW : 53) CABINET TOP HDMI UNIT ASSY Refer to DISASSEMBLY 4. HDMI UNIT ASSY and EXPLODED VIEW PCB AUDIO_VIDEO ASSY (Ref. No. of EXPLODED VIEW : 50) PCB SIDE_CNT (Ref. No. of EXPLODED VIEW : 5

47、1) PCB HDMI ASSY (Ref. No. of EXPLODED VIEW : 56) PCB FRONT_CNT (Ref. No. of EXPLODED VIEW : 57) PCB SPK/PCB SMPS Refer to DISASSEMBLY 5. PCB SPK/PCB SMPS and EXPLODED VIEW PCB SPK (Ref. No. of EXPLODED VIEW : 54) PCB SMPS (Ref. No. of EXPLODED VIEW : 55) 7 1. FRONT PANEL ASSY (1) Remove the screws.

48、 (2) Cut the wire clamp band, then disconnect the connector wires and FFC cable. Remove the screws. CABINET TOPFRONT PANEL ASSY Proceeding : View from bottom STYLE?PIN : Loose STYLE?PIN : Loose N4401 CP100 FFC cable cut Please refer to EXPLODED VIEW for the disassembly method of each PCB included in

49、 FRONT PANEL ASSY. 8 2. RADIATOR ASSY (1) Remove the screws. (2) Remove the screws. CABINET TOPRADIATOR ASSY Proceeding : View from bottom Direction of photograph: D Direction of photograph: C STYLE?PIN : Loose 9 (3) Cut the wire clamp bands, then disconnect the connector wires and FFC cable. (4) Disconnect the connector wires. STYLE?PIN : Loose N2706 CP100 FFC cable cut RADIATOR ASSY CP401CP402 CP403CP405 STYLE?PIN : Loose PCB 7CH AMP Please refer to EXPLODED VIEW for the disassembly metho