ONKYO HT-R320 AV RECEIVER Service Manual

HT-R320 SERVICE MANUAL SERVICE MANUAL AV RECEIVER Silver model MODEL HT-R320 Ref. No. 3819 082004 SMDD 120V AC, 60Hz RC-479S 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 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 SUPPLY CIRCUIT BEFORE RETURNING THE APPLIANCE TO THE CUSTOMER. Downloaded from www.Manualslib.com manuals search engine

HT-R320 SPECIFICATIONS Amplifier Section THD(Total Harmonic Distortion): Damping Factor: Input Sensitivity and Impedance: Output Level and Impedance: Frequency Response: Tone Control: SN Ratio: Speaker Impedance: Video Section Input Sensitivity /Output Level and Impedance: Tuner Section AM Tuning Frequency Range: Usable Sensitivity: S/N Ratio: THD: DVD, VIDEO 1, VIDEO 2, VIDEO 3 Video Outputs A/V Output: MONITOR OUT, VIDEO 1 1 (Optical), 1 (Coaxial) DVD, MULTICHANNEL, CD, TAPE, VIDEO 1, VIDEO 2, VIDEO 3 5.1 Specifications and features are subject to change without notice. Power Output: Front L/R: Center Surround L/R Dynamic Power: 100 W + 100 W 100 W 100 W + 100 W (8 , 20 Hz~20 kHz, FTC) 230 W + 230 W (3 , Front) 170 W + 170 W (4 , Front) 115 W + 115 W (8 , Front) 0.08 % (Power Rated) 60 (Front, 1 kHz, 8 ) 200 mV/ 47 k (LINE) 200 mV/ 2.2 k (REC OUT) 10 Hz~100 kHz / +0 dB -3 dB (Direct mode) +12 dB, -12 dB, 50 Hz (BASS) +12 dB, -12 dB, 20 kHz (TREBLE) 100 dB (CD, IHF-A) 8 ~ 16 1 Vp-p /75 (Composite) TAPE, VIDEO 1 1 5 + 2 1 530 kHz~1710 kHz 30 μV 40 dB 0.70 % General Power Supply: Power Consumption: Stand-by Power Consumption: Dimensions (W H D): Weight: AC 120 V, 60 Hz 4.7 A 1.6 W 17-1/8 5-7/8 14-3/4 inches 435 150 374 mm 8.8 kg (19.4 lbs ) FM Tuning Frequency Range: Usable Sensitivity: S/N Ratio: THD: Stereo Separation: Video Inputs A/V Input: Audio Inputs Digital Inputs: Analog Inputs: Multichannel Inputs: Audio Outputs Analog Outputs: Subwoofer Pre Outputs: Speaker Outputs: Phones: 87.5 MHz~108.0 MHz Stereo 17.2 dBf 2 μV (75 IHF) Mono 11.2 dBf 1 μV (75 IHF) Stereo 70 dB (IHF-A) Mono 76 dB (IHF-A) Stereo 0.3 % (1 kHz) Mono 0.2 % (1 kHz) 45 dB ( 1 kHz ) Downloaded from www.Manualslib.com manuals search engine

SERVICE PROCEDURES HT-R320 1. Replacing the fuses 2. Safety-check 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 500V 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 permanente, n'utiliser 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 when 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 the time the unit has been turned off. This period is shorter when the unit is exposed to a very humid climate. This device employs a microprocessor 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 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 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. 4. How to check version of microprocessor? Version 04212a ex. REF. NO. F6901 F6901 or F6902 F6902 or F901 F901 or F903 F903 or DESCRIPTION 8A-UL 8A-T/UL-ST2 8A-UL 8A-T/UL-ST2 8A-UL 8A-T/UL-ST2 5A-UL/T-237 5A-T/UL-ST2 PART NO. 252198 252261 252198 252261 252198 252261 252164 252258 REMARKS ! ! ! ! ! ! ! ! Downloaded from www.Manualslib.com manuals search engine

OPERATION CHECK-1 DC VOLTAGE DETECTION PROTECTORS CURRENT DETECTION PROTECTORS HT-R320 Test - _ Test - 1-00 FL display Clear Disappears 0.5 sec. FL display Test - _ Test - 4-00 Test - 4-29 Clear Disappears 1. Set the unit to test mode " Test-1-00 " . 1-1. Press and the hold down the CD button , then press the STANDBY/ON button when the unit is Power ON. 1-2. Press the DVD button, while the " Test - _ " is shown. Unit will be in the state of " Test-1-00 ". 2. Apply DC voltage (+1.5 to +3V) to MULTI CHANNEL (FL, FR, SL, SR, C) terminal, each channel. 3. Check that " Protect " is shown. 4. Apply DC voltage (-1.5 to -3V) to MULTI CHANNEL (FL, FR, SL, SR, C) terminal, each channel. 5. Check that " Protect " is shown. 6. Press the STANDBY/ON button. [NOTE1] Limit time to apply voltage is 0.5 to 1.0 seconds each channel. When protection operation does not occur at once, try several times. [NOTE2] Don't connect speakers or any load. Don't short speaker terminals. [NOTE] In the state of test mode" Test-4-29 ", the pulse waveform output for checking from speaker terminal automatically. Therefore, oscillator is unnecessary. 1. Set the unit to test mode " Test-4-29 " 1-1. Press and the hold down the CD button , then press the STANDBY/ON button when the unit is Power ON. 1-2. Press the VIDEO 3 button, while the" Test - _ " is shown. Unit will be in the state of " Test-4-00 ". 1-3. Repeat and press SPEAKERS B button to the " Test-4-29 " is shown. 2. Connect the lord resister (3 ohms) to the speaker terminals. 3. Check that the" Protect " is not shown, and speaker relays not turn OFF. 4. Check the each speaker terminals. 5. Connect the lord resister (1.5 ohms) to the speaker terminals. 6. Check that the " Protect " is shown, and speaker relays turn OFF immediately. 7. Check the each speaker terminals. 8. Press the STANDBY/ON button. Downloaded from www.Manualslib.com manuals search engine

OPERATION CHECK-2 OUTPUT LEVEL & THERMAL DETECTION HT-R320 RL6901 D6904 D6903 RL6902 POWER AMP. PRI. SEC1 Low High +B1 -B1 T901 MAIN TRANSFORMER Low High Q6303 THERMAL SENSOR R6380 THERMAL DETECTION OUTPUT LEVEL DETECTION VOLH/ THPRO Q7008 MAIN MICROPROCESSOR Q6303 SEC1H 23 2 SPEAKER OUT F6901 F6902 Low-voltage HIGH VOLTAGE MODE LOW VOLTAGE MODE +/- 63.0 V +/- 29.0 V High-voltage Regarding the power supply system of this unit. <Function> 1. High-voltage mode Usually, the power supply supplies high voltage to the power amplifier circuit when the relay (RL6901) is turned On. 2. Low-voltage mode When as follows, a power supply changes to the state of supplying low voltage when the relay (RL6901) in turned Off. (1) Excessive output signal is continuously outputted from power amplifier. (2) Temperature of a heat sink over 80 degrees. <Purpose> 1. The loss which power amplifier generates is decreased. As a result, the miniaturization of a heat sink is realized. 2. Corresponds to a safety standard. <Necessity for a check of operation> May not notice the fuse (F6901, F6902) broken in the case of repair. Because the power supply is continuing supplying voltage from the High side of SEC1 at high-voltage mode. When a power supply circuit changes to low voltage mode, amplifier does not operate. Therefore, it is very important to check operation of this power supply system containing a fuse. <Procedure> [NOTE] Don't connect speakers or any load. Don't short speaker terminals. (1) Set the unit is Multi channel input state. (2) Set the master volume into the minimum. (3) Apply sine wave signal to MULTI CHANNEL INPUT (FL+FR+C+SL) terminals. (4) Connect an oscilloscope to speaker terminal of FL channel. (5) Adjust master volume so that a speaker output may become distortion about 5%. (6) Check that the RL6901 and RL6902 are turned Off after about 5 seconds progress. And the power supply changes to low-voltage mode. (7) Adjust the master volume so that output voltage may become half. (8) Check that the RL6901 and RL6902 are turned On after 2 to 3 minutes. And the power supply returns to high-voltage mode. <Block diagram> Downloaded from www.Manualslib.com manuals search engine

OPERATION CHECK-3 OUTPUT LEVEL & THERMAL DETECTION HT-R320 P6301 COM TH1 TH2 U16 NAAF-8245 POWER AMPLIFIER PC BOARD P6301 TH1 COM Front side 2.7 kohms 1W Test - _ Test - 3-00 Test - 3-02 Test - 3-02 FM STEREO FM STEREO Clear Disappears 0.5 sec. Clear Disappears 0.5 sec. Test - 3-02 FM STEREO FM STEREO OUTPUT LEVEL DETECTION 1. Set the unit to test mode " Test-3-2 " 1-1. Press and the hold down the CD button , then press the STANDBY/ON button when the unit is Power On. 1-2. Press the VIDEO 2 button, while the" Test - _ " is shown. Unit will be in the state of " Test-3-00 ". 1-3. Repeat and press SPEAKERS B to while the " Test-3-2 " is shown. 2. Apply signal (sine wave 1kHz, -1.5dBV) to MULTI CHANNEL (FL, FR, SL, SR, C) terminal, each channel. 3. Check that FM STEREO indicator is shown. 4. Press the STANDBY/ON button. THERMAL DETECTION 1. Set the unit to test mode " Test-3-2 " Refer to the clause of "Output level detection". 2. Connect the resistor (2.7 kohms, 1W) between " HT1 " and " COM " terminals of P6301. 3. Check that FM STEREO indicator is shown. 4. Press the STANDBY/ON button. <Check by test mode> The following is the procedure of checking detection operation of a microprocessor in false, by using test mode. Downloaded from www.Manualslib.com manuals search engine

OPERATION CHECK-4 DSP DEBUG MODE HT-R320 DSP Debug Mode Version 04212a E1A---0 -o 23 o FL display <Ex.> Details of FL display 1 4 2 5 6 8 7 9 3 1 sec. <Regarding the DSP debug mode> TIn this test mode, the check with normal communication of a microprocessor and the data of DSP and DIR is possible. This information is a help to find the cause of failure. UNLOCK E = UNLOCK = LOCK 1 Digital Selector D = DIGITAL A = ANALOG 1 = COAX 2 = OPT1 3 = OPT2 4 = Others 2 Sampling Frequency 96 = 96kHz 48 = 48kHz 44 = 44kHz 32 = 32kHz = Not detect 3 MEMORY Address 0 = AC3+PLII 1 = AC3/PCM+T-D 2 = DTS/DTS-ES 3 = DTS 5 = AAC+PL"6" : COS 7 = FACTORY TEST MODE 6 Pre Emphasis K = OFF e = ON 4 ROM/RAM Select/Download Status H = RAM (Complete Auto Boot) L = ROM (Under Auto boot) 7 DSP Detect Format [IEC61937] 00 = Null 01= Dolby Digital 03 = Pause 04 = MPEG1 L1 05 = MPEG1 L23/MPEG2 w/o 06 = MPEG2 w/o 07 = MPEG2 AAC 0B = DTS1 0C = DTS2 0D = DTS3 1B = MPEG2 AAC1 1C = MPEG2 AAC2 [Except IEC61937] 20 = Silent 21 = DTS LD 22 = DTS CD 23 = PCM 8 DSP Decode 0 = Decode OK X = Decode NG - = Analog in 9 <How to go in DSP debug mode> 1. Press and hold down the DISPLAY button, then press the STANDBY/ON button when the unit is power ON. 2. Press the DISPLAY button, while the" Version 04212a " is shown. <How to exit> Press STANDBY/ON button. <Explanation of each parameter> DIR MEMORY/DOWNLOAD DIR Status 0 = PCM/ANALOG 2 = DTS CD 5 = DD/DTS/AAC 5 DSP Downloaded from www.Manualslib.com manuals search engine

HT-R320 EXPLODED VIEWS-1 HT-R320 U04 U03 P7502 P7503 U02 F903 F6902 F6901 U18 U19 U01 U10 U25 U09 U27 P101 U23 U08 P901 U12 T901 U11 U20 U17 P800 x 8 A028 A035 A020 x 6 A050 A051 x 6 A030 A021 A007 x 3 A005 x 10 A411 A004 A021 A021 x 2 A036 x 2 A025 A024 A404 x 24 A401 A026 A055 x 4 A010 A002 x 2 A421 x 3 A065 A413 A412 A414 A060 A420 A410 A056 x 8 A057 x 4 A017 x 2 A017 A016 x 2 A015 A023 x 4 A435 F901 Refer to <Fig-1> in EXPLODED VIEWS-2 Refer to <Fig-2> in EXPLODED VIEWS-2 U26 A022 A425 Downloaded from www.Manualslib.com manuals search engine

HT-R320 EXPLODED VIEWS-2 HT-R320 Q6064 Q6063 Q6062 Q6061 Q6060 Q6050 Q6051 Q6052 Q6054 Q6053 Q6050A x10 A037 x10 A416 (L=85mm) A417 (L=160mm) <Fig-2> <Fig-1> FRONT PANEL INSIDE VIEW A416 (L=85mm) A415 (L=135mm) A418 (L=215mm) Downloaded from www.Manualslib.com manuals search engine

SCHEMATIC DIAGRAMS-1 PRE-AMPLIFIER SECTION HT-R320 A 1 2 3 4 5 B C D L805 NC Q6402 78M12 G I O Q6406 78M05 G I O Q6405 78M12 G I O Q6403 79M12 G I O Q321 78L07 G I O Q322 79L07 G I O P302 VIDEO-3 IN P261A NC P802 NC P305 DVD SURROUND R SURROUND L SUB WOOFER CENTER P304 VIDEO-1 OUT VIDEO-1 IN VIDEO-2 IN P301 CD TAPE IN TAPE OUT Q317 NC Q319 NC Q318 NC TVDD DVDD VCOM DFZ1 LOUT3 ROUT3 LOUT2 ROUT2 LOUT1 ROUT1 LIN PVDD VREFH AVDD AVSS DFZ2 CSN CCLK CDTI CDTO INT1 INT0 SDTI3 SDTI2 PDN RX1 I2C RX2 TST RX3 SLAVE RX4 PVSS R SDTO BICK LRCK MCKO TX DVSS XTI Q801 AK4586 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 L804 022M NCH-1471 L801 022M L802 022M L803 022M X801 HC-49/U03C 12.288M T G 4 1 3 2 Q304 13 1 2 5 4 3 6 8 9 12 11 10 GND 7 VCC 14 Q303 13 1 2 5 4 3 6 8 9 12 11 10 GND 7 VCC 14 LOGIC BASS BOOST DA CL MUT VEE VCC BASS TREBLE 47k 47k 47k 47k 47k 47k 47k 47k 47k 47k 47k 47k 47k 47k 47k 47k 47k 47k 47k 47k 47k 47k 47k 47k 47k 47k 47k 47k Q301 BD3811K1 29 70 32 41 44 49 51 53 54 67 56 58 62 60 61 59 47 46 45 66 69 33 40 43 30 10 77 78 21 22 79 80 23 24 1 2 3 4 5 6 7 8 9 11 12 27 26 25 28 15 14 13 16 48 55 19 20 57 17 18 36 37 38 35 71 72 73 74 75 76 63 64 52 50 65 68 34 39 42 31 C375 472J C373 472J C374 472J C372 472J C371 472J C376 472J C849 153J C841 822J C344 C342 C343 C341 C339 C338 563J C337 C340 563J Q314 NC Q316 NC Q315 NC C816 104Z D801 D802 C859 10/16 C858 10/16 C353 47/16 C354 47/16 C358 47/16 C357 NC C356 NC C355 NC C854 10/16 C855 47/16 C856 10/16 C857 10/16 C832 10/16 C362 10/16 C349 10/16 C359 10/16 C6412 10/16 C6410 10/16 C6404 10/16 C6406 10/16 C833 10/16 C836 10/16 C837 10/16 C834 10/16 C835 10/16 C809 10/16 C806 220/6.3 C364 10/16 C363 10/16 C801 47/16 C810 47/16 C348 C347 C331 10/16 C329 10/16 C330 10/16 C332 10/16 C333 10/16 C334 10/16 Q305 OR MPC4570 NJM4565M 3 2 4 1 Q302 OR MPC4570 NJM4565M 3 2 4 1 Q802 NJM4565M 5 6 4 7 Q804 NJM4565M 5 6 4 7 Q803 NJM4565M 5 6 4 7 Q305 OR MPC4570 NJM4565M 5 8 6 7 Q302 OR MPC4570 NJM4565M 5 8 6 7 Q802 NJM4565M 3 8 2 1 Q804 NJM4565M 3 8 2 1 Q803 NJM4565M 3 8 2 1 R801 47 NC R803 47 R347 10K R348 10K R366 R365 R364 10K R363 10K R316 330 R318 330 R320 330 R339 R321 330 R343 R342 R319 330 R341 R340 R317 330 R338 R310 330 R314 330 R312 330 R333 R311 330 R332 R315 330 R337 R336 R313 330 R335 R334 R304 330 R300 330 R302 330 R306 330 R307 330 R324 R301 330 R323 R322 R303 330 R325 R327 R329 R328 R305 330 R326 R359 NC R360 NC R372 R331 470 R371 R330 470 R397 R396 NC R344 R373 470 R374 47 R375 47 R376 270 R8 47 R387 NC R386 NC R358 NC R368 47K R367 1K R369 2.2K R370 22K R383 10K R357 NC R353 NC R6410 2.2 1/2W R6408 R6403 33 1/2W R6402 10 1/2W R6407 3.3 1W R 2 R393 NC R395 NC R394 NC R392 NC R390 NC R391 NC R389 NC R356 NC R354 NC R352 NC R350 NC R349 NC R351 NC R355 NC R361 10K R362 10K R346 NC R345 NC R816 330 R832 100K R833 100K R840 2.2K R841 2.2K R848 2.2K R849 2.2K R844 2.2K R835 100K R834 100K R836 100K R837 100K R845 2.2K R852 2.2K R853 2.2K R842 2.2K R843 2.2K R850 2.2K R851 2.2K R809 1K R810 1K R811 220 R812 220 R813 220 R814 220 R807 47 R808 47 R817 330 R818 330 R819 330 R820 10K R804 47 R805 47 R806 47 R815 18K C322 104Z C308 103Z C6405 223Z C321 C320 C319 C318 C317 C316 C311 C310 C315 C314 C313 101J C312 101J C302 101J C301 C300 C303 101J C307 C306 C305 C304 C326 104Z C325 104Z C323 104Z C817 150J C803 150J C350 221J C351 330J C336 332J C335 332J C848 152J C840 821J C6411 223Z C6409 223Z C6403 223Z C367 104Z C366 104Z C327 330J C328 330J C808 104Z C800 330J C812 330J C850 152J C851 152J C852 152J C853 152J C845 821J C844 821J C843 821J C842 821J C807 104Z C811 104Z C805 104Z C804 104Z C802 150J C815 102K C814 330J C813 330J C346 C345 +7V CDR +12VAF -7V CDL TOR -12VAF TUL TUR TOL +12VVD V1OL V1OR TOL TOR V4R V4L TUL TUR TIR +5VDSP CDR TIL CDL TIR V3IR TIL V3IR V3IL V2IR V3IL V2IL OUT_L V1IR V1IL OUT_R DVDR DVDL OUT_L MRS +7V MLS MSW -7V V2IR MC ADCL SELMUT SELCK ADCR SELDA OUT_R V2IL DAC_R V1OR OUT_RS DMIXR DAC_L DMIXL V1OL OUT_LS OUT_C V1IR OUT_LS OUT_RS DAC_RS DAC_LS DAC_SW DAC_C OUT_C OUT_SW OUT_SW V1IL OUT_C DVDR +12VAF DAC_SW DAC_LS DAC_C DVDL SNONE SWNONE MRS +7V -12VAF MLS MSW SNONE -7V MC CNONE DAC_L SWNONE DAC_RS DAC_C DAC_SW CNONE +7V -7V +7V DAC_C CDTO/SCDO[L] DIRCS DSPSCK DSPDO INT1[L] INT0[L] +3.3V DAC_SW CDA SRDA LRDA SDTO BCK LRCK DAC_LS MCK2 DAC_RS +5VDSP DAC_L DIRPD GND RX3 RX2 +5VDSP RX1 TX DAC_R ADCL ADCR U01 NADG-7401 PRE-AMPLIFIER PC BOARD <Notes> NC=No mount of parts. NC NC NC NC NC NC NC NC NC NC NC NC NC 100/16 100/16 NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC THE COMPONENTS IDENTIFIED BY MARK ARE CRITICAL FOR SAFETY REPLACE ONLY WITH PART NUMBER SPECIFIED. VOLTAGE (MEASURED WITH VOLTMETER) IS DC VOLTAGE.(NO INPUT SIGNAL). ALL PNP TRANSISTORS ARE EQUIVALENT TO 2SA1015-GR UNLESS OTHERWISE NOTED. ALL NPN TRANSISTORS ARE EQUIVALENT TO 2SC1815-GR UNLESS OTHERWISE NOTED. ALL DIODES ARE EQUIVALENT TO 1SS133 UNLESS OTHERWISE NOTED. ELECTROLYTIC CAPACITORS ( ) ARE IN uF/WV. ALL CAPACITORS ARE IN pF/50WV UNLESS OTHERWISE NOTED. EX) 030- 3pF 330- 33pF 331- 330pF 333- 0.033uF ALL RESISTORS ARE IN OHMS 1/4WATTS UNLESS OTHERWISE NOTED. THE THICK LINES ON PC BOARD ARE THE PRINTING SIDE OF THE PARTS. EX) PRINTING SIDE CIRCUIT IS SUBJECT TO CHANGE FOR IMPROVEMENT. ! NOTE 101 101 101J 101J 101J 101J 101J 101J 101J 101J 101J 101J 101J 101J 101J 101J 23 SDTI1 11 RIN 33 XTO 1 NC Downloaded from www.Manualslib.com manuals search engine