Onkyo-HTR940-avr-sm维修电路原理图.pdf

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1、HT-R940 SERVICE MANUALSERVICE MANUAL AV RECEIVER Black and Silver models MODEL HT-R940 Ref. No. 3960 062006 120V AC, 60Hz 230-240V AC, 50Hz B MDC B MPP, S MPP MUTING PREVIOUS MENU GUIDE TOP MENU SP A / B SETUPRETURN PLAYLIST/CATPLAYLIST/CAT RANDOMSUBTITLE PLAY MODE AUDIOREPEAT RC- 650M -/- TAPE M D/

2、CDR HDD CABLE ON/STANDBY DIMMER ENTD TUN SLEEP 101112 INPUT SELECTOR HDDDVDVCR REMOTE MODE V1V2V3 C DTAPETUNER DVDMULTI CH LISTENING MODE TV DISPLAY TEST TONECH SEL SURROUNDSTEREO Re-EQ LEVEL+LEVEL- L NIGHT VOLVOL SAT VCR TV DVDRECEIVER C D INPUT +10 0CLR 123 456 789 ENTER CH DISC ALBUM RC-650M MAST

3、ER VOLUME VIDEO STANDBY TONEDISPLAYTHXDIMMERMEMORY DIGITAL INPUT TUNING MODEAB SPEAKERS TUNERTAPEVIDEO 3VIDEO 2VIDEO 1 VCR DVDMULTI CHC DSETUPRETURN CLEAR LISTENING MODE AUDIOLR VIDEO 3 INPUT STANDBY/ON PHONES TUNINGPRESET ENTER SAFETY-RELATED COMPONENT WARNING! COMPONENTS IDENTIFIED BY MARK ON THE

4、SCHEMATIC DIAGRAM AND IN THE PARTS LIST ARE CRITICAL FOR RISK OF FIRE AND ELECTRIC SHOCK. REPLACE THESE COMPONENTS WITH ONKYO 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 SUP

5、PLY CIRCUIT BEFORE RETURNING THE APPLIANCE TO THE CUSTOMER. RadioFans.CN 收音机爱 好者资料库 HT-R940 SERVICE PROCEDURE 1. Replacing the fuses This symbol located near the fuse indicates that the fuse used is slow operating type. For continued protection against fire hazard, replace with same type fuse. For f

6、use rating, refer to the marking adjacent to the symbol. Ce symbole indique que le fusible utilise est e lent. Pour une protection permanente, nutiliser que des fusibles de meme type. Ce demier est indique la qu le present symbol est appose. 2. To initialize the unit 1. Press and hold down VIDEO 1/V

7、CR button, then press STANDBY/ON button when the unit is powered 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. 4. Memory Backup The AV receiver uses a battery-less memory backup system in order to retai

8、n radio presets and other settings when it is unplugged or in the case of a power failure. Although no batteries are required, the AV receiver must be plugged into a wall outlet in order to charge the backup system. Once it has been charged, the AV receiver will retain the settings for several weeks

9、, although this depends on the environment and will be shorter in humid climates. 3. To check version of microprocessor Main microprocessor Q701 only. 1. Press and hold down DISPLAY button, then press STANDBY/ON button when the unit is powered on. The version will be displayed on FL display only for

10、 3 seconds. 2. Press STANDBY/ON button to power off. Ver.1.01/05305a Ex. : Canadian model : European model REF NO. F901 F901 or F901 F901 or F903 F903 or F903 F903 or F6901 F6901 or F6902 F6902 or PART NAME FUSE FUSE FUSE FUSE FUSE FUSE FUSE FUSE FUSE FUSE FUSE FUSE DESCRIPTION 8A-UL/T-233 8A-T/UL-S

11、T2 4A-SE-EAK 4A-SE-TL250V 5A-UL/T-233 5A-T/UL-ST2 2.5A-SE-EAK 2.5A-SE-TL250V 10A-UL/T-233 10A-T/UL-ST2 10A-UL/T-233 10A-T/UL-ST2 PART NO. 252329GR 252261GR 252077GR 252277GR 252326GR 252258GR 252075GR 252275GR 252330GR 252333GR 252330GR 252333GR REMARKS !, !, !, !, !, !, !, !, ! ! ! ! RadioFans.CN 收

12、音机爱 好者资料库 HT-R940 OPERATION CHECK-1 SPEAKER PROTECT-1 (DC VOLTAGE DETECTIION) 1. Press and hold down CD button, then press STANDBY/ON button while the unit is powered on. Test - _ is displayed only for 5 seconds. 2. Press VIDEO 3 button while the characters of Test - _ are displayed. The unit will b

13、e in the state of Test-4-00 . 3. Repeatedly press +(TONE) button until the characters of Test-4-21 are displayed. Procedure No load. No input. Test - _ Test - 4-00 When 1. Exchange power transistors (Q6050 - Q6056, Q6060 - Q6066). 2. Exchange amplifier PC board assy (NAAF-8779). Test - 4-21 Check wh

14、ether the operation starts and continues automatically as follows. Test - 4-21 Test - 4-22 Test - 4-25 Test - 4-23 Test - 4-24 Protect OK Protect OK Protect Protect OK Protect OK Protect OK Test - 4-35 Clear Turn off Front L ch Check If all channels are OK, the characters of Test-4-35 are displayed.

15、 4. Press STANDBY/ON button. Front R ch Check Center ch Check Surround L ch Check Surround R ch Check Blinks Test - 4-26 Protect OK Surround Back L ch Check Test - 4-27 Protect OK Surround Back R ch Check HT-R940 OPERATION CHECK-2 SPEAKER PROTECT-2 (CURRENT DETECTION) 1. Press and hold down CD butto

16、n, then press STANDBY/ON button while the unit is powered on. Test - _ is displayed only for 5 seconds. 2. Press VIDEO 3 button, while Test - _ is displayed. The unit will be in the state of Test-4-00 . 3. Repeatedly press +(TONE) button until Test-4-35 is displayed. 4. Connect the dummy load of 3 o

17、hms to the Front L ch speaker terminals. At this time, confirm that the speaker relay is not turned off. 5. Connect the dummy load of 1 ohm to the Front L ch speaker terminals. At this time, confirm that the speaker relay is turned off and Protect is displayed. Disconnect the dummy load immediately

18、after checking the display of Protect . 6. Check other channels according to the same procedure as 4 and 5. Procedure No input. Do not check two or more channels at the same time. Do not connect a dummy load to speaker terminal longer than 2 seconds. Test - _ Test - 4-00 When 1. Exchange power trans

19、istors (Q6050 - Q6056, Q6060 - Q6066). 2. Exchange amplifier PC board assy (NAAF-8779). Test - 4-35 Clear Turn off 7. Press the STANDBY/ON button. Test - 4-35 Protect Test - 4-35 Blinks HT-R940 OPERATION CHECK-3 CONTROL OF POWER SUPPLY (OUTPUT SENSOR AND THERMAL SENSOR) Test - _ Test - 4-00 Test - 4

20、-36 Clear Turn off Blinks Ver. 1.01/06222A T: 25 C/ 77 F Clear Turn off Output sensor 1. Press and hold down CD button, then press STANDBY/ON button while the unit is powered on. Test - _ is displayed only for 5 seconds. 2. Press VIDEO 3 button while Test - _ is displayed. The unit will be in the st

21、ate of Test-4-00 . 3. Repeatedly press +(TONE) button until Test-4-36 is displayed. Test - 4-36 FM STEREO 4. At this time, confirm that the red characters of FM STEREO is displayed. And, confirm that the relays RL6901 and RL6902 are turned off in 2 or 3 seconds. 6. Press STANDBY/ON button. Procedure

22、 No output. No input. When 1. Exchange power transistors (Q6050 - Q6056, Q6060 - Q6066). 2. Exchange power amplifier PC board assy (NAAF-8779). 3. Exchange thermal sensor PC board assy (NAETC-8781). Thermal sensor 1. Press and hold down DISPLAY button, then press STANDBY/ON button when the unit is p

23、owered on. The microprocessor version will be displayed for 3 seconds. 2. Press TONE button while the version is displayed. 4. Press STANDBY/ON button. Test - 4-37 FM STEREO 5. Press +(TONE) button and confirm that the red characters of FM STEREO is displayed. And, confirm that the relays RL6901 and

24、 RL6902 are turned off in 2 or 3 seconds. 3. Confirm that the displayed temperature is within +/-20 C from the ambient temperature. HT-R940 OPERATION CHECK-4 DEBUG MODE-1 E1A48K0N/OFFPoO Ver. 101/06222A 14256871039 The operations of DSP and DIR etc are able to checked by the information displayed on

25、 FL in this debug mode. This information will help to analysing digital audio no sound trouble. DIR Input E = UNLOCK = LOCK 1 Digital Selector 0 = None 1 = COAXIAL 2 = 3 = OPT 1 4 = OPT 2 5 = 7 = 2 Sampling Frequency and Emphasis 32K = 32 kHz without Emphasis 44K = 44.1 kHz without Emphasis 48K = 48

26、kHz without Emphasis 64K = 64 kHz 4 DIR Detect Type 0 = Analog 1 = PCM 2 = Not PCM 3 = Data 4 = DTS CD (Not used) 5 = Multich 6 = Not Decided 5 DSP Detect Format P = PCM (Analog) D = Dolby Digital d = DTS A = AAC ? = Unknown 9 DSP Decode o = Decode OK x = Decode NG 10 To set in Debug mode 1. Press a

27、nd hold down DISPLAY button, then press STANDBY/ON button while the unit is powered on. The version number of microprocessor is displayed only for 3 seconds. 2. Press DISPLAY button while the DSP version is displayed. The status of DSP and DIR etc will be displayed. To exit Press STANDBY/ON button.

28、- DIR - DIR Status D = Digital A = Analog M = Multich P = Multich PCM p = PCM Fixed d = DTS Fixed 3 - DSP - Content of Display CODEC Clock Mode N = Normal U = Up Sampling H = High Sampling (Double Rate) D = Down Sampling Q = Quad Rate 6 DSP Port 0 = NIC 1 = DEC 2 = BUSY 3 = EXEC WAIT 04 = Boot 11 =

29、Restart FF = Free 7 11 6 = OPT 3 88K = 88.2 kHz 96K = 96 kHz 176 = 176.4 kHz 192 = 192 kHz 32e = 32 kHz with Emphasis 44e = 44.1 kHz with Emphasis 48e = 48 kHz with Emphasis DSP Sequence8 Mute output IC11 (Normal state) (Abnormal state) - Main Microprocessor - 0 = Selector IC(Q5501) 1 2 = DSP(Q201)

30、3 = DIR(Q301) 1. Press TONE+ button within 3 seconds above, the version number of DSP will be displayed for 5 seconds. DSP :06206A FL Display HT-R940 OPERATION CHECK-5 DEBUG MODE-2 Trouble Cause Analysis by Debug Mode This debug mode will help in analysing digital audio no sound trouble. Check infor

31、mation on FL display and the related devices or circuits. Symptom on DisplayCauseCheck E is displayedNo input signal to DIRRelated devices from digital input to Q301 Displayed freq. is different from input signal freq. No input signal to DIRRelated devices from digital input to Q301 Displayed format

32、 is different from input signal format No input signal to DIRRelated devices from digital input to Q301 04 or 11 do not change to FF ROM or RAM errorQ281, Q282 CDIN is the input data line for control port interface in SPI mode. 2 3 4 51 5 52 6 7 8 9 RXP1/GP01 RXP1/GP01 RXP1/GP01 RXP1/GP01 RXP1/GP01

33、RXP1/GP01 RXP1/GP01 VARX AGND LPFLT MUTEC AOUTA1- AOUTA1+ AOUTB1+ AOUTB1- AOUTA2- CX_SDIN2 CX_SDIN3 CX_SDIN4 SAI_SCLK SAI_LRCK OMCK ADCIN1 ADCIN2 CX_SDOUT RMCK SAI_SDOUT VLS DGND VD TXP RXPO CX_SDIN1 CX_SCLK CX_LRCK VD DGND VLC SCL/CCLK SDA/CDOUT AD1/CDIN AD0/CS INT RST AINR- AINR+ AINL+ AINL- VQ FI

34、LT+ REFGND AOUTB4- AOUTB4+ AOUTA4+ AOUTA4- VA AGND AOUTB3- AOUTB3+ AOUTA3+ AOUTA3- AOUTB2- AOUTB2+ AOUTA2+ 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 CS42518 IC

35、 BLOCK DIAGRAMS AND TERMINAL DESCRIPTIONS-14 Q301 : CS42518 (8-ch Codec with S/PDIF Receiver)-3/4 TERMINAL DESCRIPTION(2/3) TX-SR574 Pin Name#Pin Description AD0/CS10Address Bit 0 (I2C)/Control Port Chip Select (SPI) (INput) - AD0 is a chip address pin in I2C mode; CS is the chip select signal in SP

36、I mode. INT11Interrupt (Ountput) - The CS42518 will generate an interrupt condition as per the Interrupt Mask register. RST12Reset (Input) - The device enters a low power mode and all internal registers are reset to their default settings when low. AINR- AINR+ 13 14 Differential right Channel Analog

37、 Input (Input) - Signals are presented differentially to the delta-sigma modulators via the AINR+/- pins. AINL- AINL+ 15 16 Differential right Channel Analog Input (Input) - Signals are presented differentially to the delta-sigma modulators via the AINR+/- pins. VQ17Quiescent Voltage (Output) - Filt

38、er connection for internal quiescent reference voltage. FILT+18Positive Voltage Reference (Output) - Positive reference voltage for the internal sampling circuits. REFGND19Reference Ground (Input) - Ground reference for the internal sampling circuits. AOUTA1 +, - AOUTB1 +, - AOUTA2 +, - AOUTB2 +, -

39、AOUTA3 +, - AOUTB3 +, - AOUTA4 +, - AOUTB4 +, - 36, 37 35, 34 32, 33 31, 30 28, 29 27, 26 22, 23 21, 20 Differential Analog Output (Output) - The full-scale differential analog output level is specified in the Analog Characteristics specification table. VA VARX 24 41 Analog Power (Input) - Positive

40、power supply for the analog section. AGND25 40 Analog Ground (Input) - Ground reference. Should be connected to analog ground. MUTEC38Mute Control (Output) - The Mute Control pin outputs high impedance following an initial power -on con- dition or whenever the PDN bit is set to a 1, forcing the code

41、c into power -down mode. The signal will remain in a high impedance state as long as the part is in power-down mode. The Mute Control pin goes to the selected active state during reset, muting, or if the master clock to left/right clock frequency ratio is incorrect. This pin is intended to be used a

42、s a control for external mute circuits to prevent the clicks and pops that can occur in any single supply system. The use of external mute circuits are not manda- toy but may be desired for designs requiring the absolute minimum in extraneous clicks and pops. LPFLT39PLL Loop Filer (Output) - An RC n

43、etwork should be connected between this pin and ground. RXP7/GPO7 RXP6/GPO6 RXP5/GPO5 RXP4/GPO4 RXP3/GPO3 RXP2/GPO2 RXP1/GPO1 42 43 44 45 46 47 48 S/PDIF Receiver Input/ General Purpose Output (Input/ Output) - Receiver inputs for S/PDIF encoded data. The CS42518 has an internal 8:2 multiplexer to s

44、elect the active receiver port, according to the Receiver Mode Control 2 resister. These pins can also be configured as general purpose output pins, ADC Overflow indicators or Mute Control outputs according to the RXP/General Purpose Pin Control resisters. RXP049S/PDIF Receiver Input (Input) - Dedic

45、ated receiver input for S/PDIF encoded data. TXP50S/PDIF Transmitter Output (Output) - S/PDIF encoded data output, mapped directly from one of the receiver inputs as indicated by the Receiver Mode Control 2 resister. VLP53Serial Port Interface Power (Input) - Determines the required signal level for

46、 the serial port interfaces. SAI_SDOUT54Serial Audio Interface Serial Data Output (Output) - Output for twos complement serial audio PCM data from the S/PDIF incoming stream. This pin can also be configured to transmit the output of the inter- nal and external ADCs. RMCK55Recovered Master Clock (Out

47、put) - Recovered master clock output from the External Clock Reference TX-SR574 IC BLOCK DIAGRAMS AND TERMINAL DESCRIPTIONS-15 Q301 : CS42518 (8-ch Codec with S/PDIF Receiver)-4/4 TERMINAL DESCRIPTION(3/3) Pin Name#Pin Description CL_SDOUT56CODEC Serial Data Output (Output) - Output for twos complem

48、ent serial audio data the internal and external ADCs. ADCIN1 ADCIN2 58 57 External ADC Serial Input (Input) - The CS42518 provides for up two external stereo analog to digital converter inputs to provide a maximum of six channels on serial data output line when the CS42518 is placed in One Line mode. OMCK59External Reference Clock (Input) - External clock reference that must be within the ranges specified in currently active on the serial audio data line. SAI_LRCK60Serial Audio Interface Left/Right Clock (Input/Output) - Determines which channel, Left of Right, is currently active on the ser