Onkyo-HTR420-avr-sm维修电路原理图.pdf

《Onkyo-HTR420-avr-sm维修电路原理图.pdf》由会员分享，可在线阅读，更多相关《Onkyo-HTR420-avr-sm维修电路原理图.pdf（89页珍藏版）》请在收音机爱好者资料库上搜索。

1、TX-SR402/8240/HT-R420 SERVICE MANUALSERVICE MANUAL AV RECEIVER MODEL TX-SR402 TX-SR8240 HT-R420 Ref. No. 3796 032004 TX-SR402 Silver and Golden models 220-230V AC, 50/60HzSMGR,GMGR HT-R420 Black and Silver models 120V AC, 60HzBMDC,BMDD,SMDC,SMDD 230-240V AC, 50HzBMPA,SMPA,SMPT 120V/220-230V AC, 50Hz

2、SMWT TX-SR8240 Golden models 220-230V AC, 50/60HzGMGR RC-518M (Noth American model) RC-479S (Other models) SAFETY-RELATED COMPONENT WARNING! COMPONENTS IDENTIFIED BY MARK ON THE SCHEMATIC DIAGRAM AND IN THE PARTS LIST ARE CRITICAL FOR RISK OF FIRE AND ELECTRIC SHOCK. REPLACE THESE COMPONENTS WITH ON

3、KYO PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL. MAKE LEAKAGE-CURRENT OR RESISTANCE MEASUREMENTS TO DETERMINE THAT EXPOSED PARTS ARE ACCEPTABLY INSULATED FROM THE SUPPLY CIRCUIT BEFORE RETURNING THE APPLIANCE TO THE CUSTOMER. RadioFans.CN 收音机爱 好者资料库 TX-SR402/8240/HT-R420 SPECIFICATIONS-1

4、 TX-SR402/TX-SR8240 Audio Outputs Analog Outputs: TAPE, VIDEO1 Subwoofer Pre Outputs: 1 Speaker Outputs: 5+2 Phones: 1 Specifications and features are subject to change without notice. Power Supply: AC 220-230 V, 50/60 Hz Power Consumption: 300W Dimensions: 435 W x 150 H x 374 D mm 17 1/8 W x 5 7/8

5、H x 14 3/4 D inches Weight: 8.8 kg 18.4 lbs Video Inputs S-Video Compatible Jack Input: DVD, VIDEO1, VIDEO2 A/V Input: DVD, VIDEO1, VIDEO2, VIDEO3 Video Outputs S-Video Compatible Jack Output: MONITOR, VIDEO1 A/V Output: MONITOR, VIDEO1 Audio Inputs Digital Inputs: 1 (Optical ) , 1 (Coaxial ) Analog

6、 Inputs: DVD (MULTI CHANNEL), CD, TAPE, VIDEO1, VIDEO2, VIDEO3 Multichannel Inputs: 6 General Power Output: All channels: 100 W (6 , 1kHz, JEITA) Dynamic Power: 160 W + 160 W (3 , Front) 125 W + 125 W (4 , Front) 85 W + 85 W (8 , Front) THD (Total Harmonic Distortion): 0.08 % (Power Rated) Damping F

7、actor: 60 (Front, 1kHz, 8 ) Input Sensitivity and Impedance: 200 mV/ 47 k (LINE) Output Level and Impedance: 200 mV/ 470 (REC OUT) Frequency Response: 10 Hz100 kHz / +1 dB -3 dB (Direct mode) Tone Control: +12 dB, -12 dB, 50 Hz (BASS) +12 dB, -12 dB, 20k Hz (TREBLE) SN Ratio: 100 dB (CD, IHF-A) Spea

8、ker Impedance: 6-16 Amplifier Section Input Sensitivity/Output Level and Impedance: 1 Vp-p /75 (Component and S-Video Y) 0.28 Vp-p /75 (Component Pb/Cb,Pr/Cr) 0.28 Vp-p /75 (S-Video C) 1 Vp-p /75 (Composite) Video Section FM Tuning Frequency Range: 87.5 MHz108.0 MHz Usable Sensitivity: Stereo 17.2 d

9、Bf 2 V (75 IHF) Mono 11.2 dBf 1 V (75 IHF) S/N Ratio: Stereo 70 dB (IHF-A) Mono 76 dB (IHF-A) THD: Stereo 0.3 % (1kHz) Mono 0.2 % (1kHz) Frequency Response: 30 Hz15 kHz / +1 dB, -1 dB Stereo Separation: 45 dB ( 1kHz ) AM Tuning Frequency Range: 522-1611 kHz Usable Sensitivity: 30 V S/N Ratio: 40 dB

10、THD: 0.70% Tuner Section RadioFans.CN 收音机爱 好者资料库 TX-SR402/8240/HT-R420 SPECIFICATIONS-2 HT-R420 Audio Outputs Analog Outputs: TAPE, VIDEO1 Subwoofer Pre Outputs: 1 Speaker Outputs: 5+2 Phones: 1 Specifications and features are subject to change without notice. Power Supply: American model: AC 120 V,

11、 60 Hz Australian model: AC 230 V, 50 Hz Others model: AC 120-220/230 V, 50/60 Hz Power Consumption: American model: 4.7A Australian and Worldwide model: 300 W Dimensions: 435 W x 150 H x 374 D mm 17 1/8 W x 5 7/8 H x 14 3/4 D inches Weight: 8.8 kg 19.4 lbs Video Outputs S-Video Compatible Jack Outp

12、ut: MONITOR, VIDEO1 A/V Output: MONITOR, VIDEO1 Video Inputs S-Video Compatible Jack Input: DVD, VIDEO1, VIDEO2 A/V Input: DVD, VIDEO1, VIDEO2, VIDEO3 Audio Inputs Digital Inputs: 1 (Optical ) , 1 (Coaxial ) Analog Inputs: DVD (MULTI CHANNEL), CD, TAPE, VIDEO1, VIDEO2, VIDEO3 Multichannel Inputs: 6

13、General Power Output: All channels: 100 W (8 , 20Hz20kHz, FTC) American model 100 W (8 , 1kHz, DIN) Australian model 100 W (6 , 1kHz, JEITA) Asian model Dynamic Power: 230 W + 230 W (3 , Front) 170 W + 170 W (4 , Front) 115 W + 115 W (8 , Front) THD (Total Harmonic Distortion): 0.08 % (Power Rated)

14、Damping Factor: 60 (Front, 1kHz, 8 ) Input Sensitivity and Impedance: 200 mV/ 47 k (LINE) Output Level and Impedance: 200 mV/ 470 (REC OUT) Frequency Response: 10 Hz100 kHz / +1 dB -3 dB (Direct mode) Tone Control: +12 dB, -12 dB, 50 Hz (BASS) +12 dB, -12 dB, 20k Hz (TREBLE) SN Ratio: 100 dB (CD, IH

15、F-A) Speaker Impedance: 816 Amplifier Section Input Sensitivity/Output Level and Impedance: 1 Vp-p /75 (Component and S-Video Y) 0.28 Vp-p /75 (Component Pb/Cb,Pr/Cr) 0.28 Vp-p /75 (S-Video C) 1 Vp-p /75 (Composite) Video Section FM Tuning Frequency Range: 87.5 MHz108.0 MHz Usable Sensitivity: Stere

16、o 17.2 dBf 2 V (75 IHF) Mono 11.2 dBf 1 V (75 IHF) S/N Ratio: Stereo 70 dB (IHF-A) Mono 76 dB (IHF-A) THD: Stereo 0.3 % (1kHz) Mono 0.2 % (1kHz) Frequency Response: 30 Hz15 kHz / +1 dB, -1 dB Stereo Separation: 45 dB ( 1kHz ) AM Tuning Frequency Range: American model: 530 kHz1710 kHz Australian mode

17、l: 522 kHz1611 kHz Others model: 530/522 kHz1710/1611 kHz Usable Sensitivity: 30 V S/N Ratio: 40 dB THD: 0.70% Tuner Section TX-SR402/8240/HT-R420 SERVICE PROCEDURES-1 120V VOLTAGE SELECTOR 220-230V 120 V VOLTAGE SELECTOR 220-230 V SWITCHED 100W MAX. AC OUTLET 1. Replacing the fuses 2. Safety-check

18、out (Only U.S.A. model) After correcting the original service problem perform the following safety check before releasing the set to the customer Connect the insulating-resistance tester between the plug of power supply cord and terminal GND on the back panel. Specifications: More than 10Mohm at 500

19、V This symbol located near the fuse indicates that the fuse used is show operating type, For continued protection against fire hazard, replace with same type fuse, For fuse rating, refer to the marking adjacent to the symbol. Ce symbole indique que le fusible utilise est e lent. Pour une protection

20、permanente, nutiliser que des fusibles de meme type. Ce demier est indique la qu le present symbol est apposre. 3. To initialize the unit This unit does not require memory preservation batteries. A built-in memory power backup system preserves the contents of memory during power failures and even wh

21、en the power cord is unplugged. The power cord must be plugged in order to charge the backup system. The memory preservation period after the unit has been turned off varies depending on climate and placement of the unit. On average, memory contents are protected over a period of a few weeks after t

22、he time the unit has been turned off. This period is shorter when the unit is exposed to a very humid climate. NOTE : 120V model only : 120V model only : World wide model only : Chinese model only for 220V : Australia model only for230V : Asian model only for 230V This device employs a microprocesso

23、r to perform various functions and operations. If interference generated by an external power supply, radio wave, or other electrical sauce results in accident which causes the specified operations and functions to operate abnormally. To perform a result, please follow the procedure below. 1. Press

24、and the hold down the VIDEO 1 button , then press the STANDBY/ON button when the unit is Power ON. 2. After Clear is displayed, the preset memory and each mode stored in the memory, are initialized and will return to the factory settings. 5. Memory Preservation 6.Setting the voltage selector (Worldw

25、ide models only) The Worldwide model has a voltage selector for compatibility with power systems around the world. Before you plug in this model, make sure that the voltage selector is set to the correct voltage for your area. If it isnt, use a small screwdriver to set it as appropriate. For example

26、, if the voltage in your area is 120 volts (V), set the selector to 120V. And if its between 220 and 230 volts (V), set it to 220-230V. REF NO.PART NO. DESCRIPTIONNOTES F6901,F6902 F6901,F6902 F6901or,F6902or F901 F901 or F902 F902 or F902 or F903 F903 or F903 or F903 F903 or 252099 252198 252261 25

27、2198 252261 252076 252242 252276 252075 252241 252275 252164 252258 8A-EAK FUSE 8A-UL 8A-T/UL-ST2 8A-UL 8A-T/UL-ST2 3.15A-SE-EAK FUSE 3.15A-SE-TL250V 3.15A-SE-TL250V 2.5A-SE-EAK FUSE 2.5A-SE-TL250V 2.5A-SE-TL250V 5A-UL/T-237 5A-T/UL-ST2 GR,WT,PA,PT DC,DD DC,DD DC,WT,DD DC,WT,DD GR,WT,PA,PT GR,WT,PA,

28、PT GR,WT,PA,PT GR,WT,PA,PT GR,WT,PA,PT GR,WT,PA,PT DC,DD DC,DD Main microprocessor Q7008. 1. Press and the hold down the DISPLAY button , then press the STANDBY/ON button when the unit is Power ON. Version is displayed on FL display only for 3 seconds. 2. Press the STANDBY/ON button to Power Off. Su

29、b microprocessor Q7502. Check is impossible. (Unnecessary) 4. How to check version of microprocessor? Version 30212a ex. TX-SR402/8240/HT-R420 SERVICE PROCEDURES-2 NCDG-7401 25137401C 7002 C7003 D7001 D7002 R7001 R7002 R7003 R7004 R7011 R7012 R7015 R7016 R7017 R7018 R7019 R7020 R7120 Q7008 1 Micropr

30、ocessor 1. Worldwide model (MWT). You can select AM band step 9kHz or 10kHz by the following operation. How to select? Press and hold down the TUNER , then press the MEMORY. 2. Except worldwide model. 2-1. Necessary to change as follows. R7003 Change to 10 kohms. (Refer to Fig-1) R7004 Change to 10

31、kohms. (Refer to Fig-1) 2-2. How to select? Press and hold down the TUNER , then press the MEMORY. Fig-1 NADG-7401 (PREAMPLIFIER PC BOARD) 7. Changing the AM band step component side TX-SR402/8240/HT-R420 19181716151413 123456789101112 STANDBY/ON button When STANDBY/ON button is pressed to ON, the d

32、isplay will light to show the current volume setting for about 5 seconds then show the current sound input source. Pressing the button again returns the unit to the standby state. This state turns off the display, disables control functions. STANDBY indicator Lights when the unit is in the standby s

33、tate and flashes when a signal is received from the remote controller. DIMMER button Press to set the brightness of the front display. The brightness changes to normal, dim and very dim. DIGITAL INPUT button When digital components are connected to the DIGITAL INPUT jacks of the unit use this button

34、 to assign the DIGITAL INPUT jacks to them according to their forms of connection. SUBWOOFER MODE button Press to select the subwoofer mode. MEMORY button This button is used to assign the radio station that is currently tuned in to a preset channel or delete a previously preset station. FM MODE but

35、ton Press to switch the reception mode between stereo and monaural. If audio is interrupted or noise interferes with audio during FM stereo broadcasting, press this button to switch to the monaural reception mode. TUNING / buttons Use these buttons to change the tuner frequency. When FM is selected,

36、 you can hold down one of the TUNING / buttons and then release it to activate the auto-search feature. It will search for a station in the direction of the button you pressed and stop when it tunes into one. Remote control sensor This sensor receives the control signals from the remote controller.

37、LISTENING MODE buttons Press these buttons to select a listening mode for the current source. Press the DSP button to recall the Onkyo-original DSP modes in sequence. Press the DIRECT, STEREO or SURROUND button to recall the corresponding listening mode directly. PRESET/ADJUST / buttons These button

38、s make it possible to store desired radio stations under the desired preset numbers and recall them with an easy operation. Also, these buttons adjust the values and parameters of the mode selected using the AUDIO ADJUST, SPEAKER ADJUST or AUDIO SELECTOR button. MASTER VOLUME dial The MASTER VOLUME

39、dial is used to control the volume level. Turn the dial clockwise to increase the volume level and counterclockwise to decrease it. SPEAKERS A/B buttons Press SPEAKERS A/B to turn on/off the speaker system A/B. The (SPEAKERS) A/B indicators corresponding to the selected speaker system light up. You

40、can use SPEAKERS A and B simultaneously. PHONES jack This is a standard stereo jack for connecting stereo headphones. The audio for the front right and left speakers are sent to the headphone speakers. 1 8 9 10 11 12 13 14 2 3 4 5 6 7 DISPLAY button Each time you press the DISPLAY button, the displa

41、y changes. AUDIO SELECTOR button Press to select an audio input signal format other than FM and AM. Each time this button is pressed, the setting cycles. Input selector buttons (DVD,VIDEO 1,VIDEO 2, VIDEO 3, TAPE, TUNER, and CD) These buttons are used to select the input source. Pressing and holding

42、 the TAPE button for about 2 seconds allows the TAPE and MD sources to be switched. SPEAKER ADJUST button Press to select speaker setting item. AUDIO ADJUST button Press to adjust bass, treble, late night function, cinema filter, Panorama, Dimension and Center Width function setting. 15 16 17 18 19

43、PANEL VIEWS-1 FRONT PANEL TX-SR402/8240/HT-R420 h ab c d eg f i (SPEAKERS) A/B indicators Shows the current speaker system in use. MUTING indicator Flashes when the mute function is active. Source/Listening mode indicators TUNED indicator Lights up when a radio station is received. MEMORY indicator

44、Lights up when the MEMORY button is pressed in the radio station preset operation. AUTO indicator Lights up to indicate auto reception mode (stereo/monaural). At this time, interstation noise will be muted (FM only). It extinguishes when the monaural reception mode is started by pressing the FM MODE

45、 button. FM STEREO indicator Lights up when an FM stereo broadcast station is received. a b c d e f g SLEEP indicator Lights up when the sleep timer is active. h One of these indicators lights to show the format of the current source as PCM, DIGITAL or DTS. In addition, one of the listening mode ind

46、icators PRO LOGIC II, MULTI CH, DSP, STEREO and DIRECT lights according to the current listening mode. Multi function display In usual operation, shows the current input source and volume. When the FM or AM input is selected, it shows the frequency and preset number. When the DISPLAY button is press

47、ed, it shows the current input source and the listening mode. i PANEL VIEWS-2 DISPLAY TX-SR402/8240/HT-R420 REMOTE CONTROL RLRL ININININ IN COAXIALOPTICAL ININININFRONTSURRCENTER SUB WOOFER VIDEO 2VIDEO 1 OUT ININOUT OUTOUT DIGITAL INPUT VIDEO 2VIDEO 3VIDEO 1DVDMONITOR OUT VIDEO S VIDEO DVD TAPECD F

48、RONT SPEAKERS A FRONT SPEAKERS B L R IN VIDEO 3 RL SURROUND SPEAKERS CENTER SPEAKER L R AC OUTLET ANTENNA FM 75 AM SUBWOOFER PRE OUT 12345 1211109876 ANTENNA These terminals are for connecting the FM antenna and AM antenna. FRONT SPEAKERS B These terminals are for connecting the speaker system B. FR

49、ONT SPEAKERS A, CENTER SPEAKER and SURROUND SPEAKERS These terminals are for connecting the speaker system A, including the center and surround speakers. AC OUTLET The unit is supplied with AC outlet for connecting the power cord from other devices so that their power is supplied through the unit. By doing this, you can use the STANDBY/ON button on the unit to turn on and off the connected devices as well. DIGITAL INPUT OPTICAL, COAXIAL These are digital