TX-DS797 Ref. No. 3714 102001 SERVICE MANUAL AV RECEIVER MODEL TX-DS797 DISPLAY DIMMER REC OUT ZONE 2 OFF MASTER VOLUME STANDBY/ON SETUP TUNI NG ENTER STANDBY POWER RE TURN PRESET ON OFF DIRECT STEREO SURROUND THX DSP FM MODE MEMORY A-FO RM LISTENING MODE MEMORY UPSAMPLING CLEAR ZONE 2 ( GRN ) PHONES REC ( RED ) VIDEO 5/VIDEO CAM INPUT AUDIO DVD VIDEO 1 VIDEO 2 VIDEO 3 VIDEO 4 VIDEO 5 TAPE FM AM PHONO CD SELECTOR VCR 1 VCR 2 DIGITAL S VIDEO VIDEO L AUDIO R AV RECEIVER TX-DS797 Black, Golden and Silver models BMDD 120V AC, 60Hz BMPP,SMPP,BMPA,GMPA 230-240V AC, 50Hz BMWT,GMWT,GMWR 120/220-230V AC, 50/60Hz GMGT 220-230V AC, 50Hz SAFETY-RELATED COMPONENT WARNING!! COMPONENTS IDENTIFIED BY MARK ON THE SCHEMATIC DIAGRAMS 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. TX-DS797 SPECIFICATIONS AMPLIFIER SECTION TUNER SECTION Continuous Average Power output (FTC) FM All channels: 100 watts per channel min. RMS at Tuning Range: 87.5 -- 108.0 MHz (50 kHz steps) 8 ohms, 2 channels driven from 20 Usable Sensitivity Hz to 20 kHz with no more than Mono: 11.2 dBf, 1.0 u V (75 ohms IHF) 0.08% total harmonic distortion. 0.9 uV (75 ohms DIN) 130 watts min. RMS at 6 ohms, 2 Stereo: 17.2 dBf, 2.0 u V (75 ohms IHF) channels driven from 1 kHz with 23u V (75 ohms DIN) no more than 0.1% total harmonic 50 dB Quieting Sensitivity distortion. Mono: 17.2 dBf, 2.0uV (75 ohms) Continuous Power output (DIN) 135 watts at 6 ohms Stereo: 37.2 dBf, 20uV (75 ohms) Maximum Power output (EIAJ) 160 watts at 6 ohms Capture Ratio: 2.0 dB Dynamic Power Output (Stereo) 2 x 250 watts at 3 ohms Image Rejection Ratio 2 x 210 watts at 4 ohms USA & Canadian models: 40 dB 2 x 130 watts at 8 ohms Other area models: 85 dB Total Harmonic Distortion: 0.08% at rated power IF Rejection Ratio: 90 dB 0.08% at 1 Watt output Signal-to-Noise Ratio IM Distortion: 0.08% at rated power Mono: 76 dB 0.08% at 1 Watt output Stereo: 70 dB Damping Factor: 60 at 8 ohms Alternate Channel Attenuation: 55 dB Input Sensitivity and Impedance Selectivity: 50 dB (DIN) PHONO: 2.5 mV, 50 kohms AM Suppression Ratio: 50 dB LINE (CD, TAPE, DVD, Total Harmonic Distortion VIDEO 1-5): 200 mV, 50 kohms Mono: 0.2% MULTICHANNEL INPUT Stereo: 0.3% (FRONT L/C/R, SURROUND Frequency Response: 30 Hz -- 15 kHz, 1.0 dB L/R, SURROUND BACK L/R): 200 mV, 50 kohms Stereo Separation: 45 dB at 1 kHz (SUBWOOFER): 36 mV, 50 kohms 30 dB at 100 Hz 10 kHz -- COAXIAL 1, 2, 3 (DIGITAL): 0.5 Vp-p, 75 ohms AM DVD, VIDEO 1, 2, 3, 4, 5: 1 Vp-p, 75 ohms Tuning Range 1 Vp-p, 75 ohms (Y) USA & Canadian models: 530 to 1,710 kHz (10-kHz steps) 0.28 Vp-p, 75 ohms (C) European & Australian models: 522 to 1,611 kHz (9-kHz steps) COMPONENT VIDEO 1, 2: 1 Vp-p, 75 ohms (Y) Worldwide models: 531 to 1,602 kHz (9-kHz steps) 0.7 Vp-p, 75 ohms (PB,PR) 530 to 1,710 kHz (10-kHz steps) Output Level and Impedance Usable Sensitivity: 30 uV Rec out (TAPE, VIDEO 1, 2): Image Rejection Ratio: 40 dB 200 mV, 470 ohms IF Rejection Ratio: 40 dB Pre out: 1 V, 470 ohms Signal-to-Noise Ratio: 40 dB ZONE 2 OUT: 100mV, 470 ohms Total Harmonic Distortion: 0.7% VIDEO (VIDEO 1, 2, MONITOR OUT, ZONE 2 OUT): 1 Vp-p, 75 ohms GENERAL 1 Vp-p, 75 ohms (Y) Power Supply 0.28 p-p, 75 ohms (C) USA & Canadian models: AC 120 V, 60 Hz COMPONENT VIDEO OUT: 1 Vp-p, 75 ohms (Y) European & Australian models: AC 230-240 V, 50 Hz 0.7 Vp-p, 75 ohms (PB,PR) Some Asian models: AC 220-230 V, 50/60 Hz Phono Overload: 120 mV RMS at 1 kHz, 0.5% T.H.D. Worldwide models: AC 220-230 and 120 V switchable, Frequency Response: 10 Hz to 100 kHz : +1/-3 dB 50/60 Hz (CD in Direct mode) Power Consumption RIAA Deviation: 20 Hz to 20 kHz : 0.8 dB USA & Canadian models: 6.8 A Tone Control Other models: 550 W Bass: 10 dB at 50 Hz Dimensions (W x H xD): 435 x 175 x 459 mm Treble: 10 dB at 20,000 Hz 17-1/8" x 6-7/8" x 18-1/16" Signal-to-Noise Ratio (Stereo) Weight Phono: 80 dB (IHF A, 5 mV input) USA & Canadian models: 35.9 lbs. CD/Tape: 110 dB (IHF A, 0.5 V input) Other models: 17.3 kg REMOTE CONTROLLER Transmitter: Infrared Signal range: Approx. 16 ft., 5 meters Power supply: Two " AA " batteries (1.5 V x 2) Specifications and features are subject to change without notice. TX-DS797 A B C D SERVICE PROCEDURES 1. Replacing the fuses 4. Memory Preservation This unit does not require memory preserv ation batteries. A This symbol located near the fuses indicates that the built-in memory power back-up system preserv es the contents 1 fuse used is fast operating type. For continued protection against of the memory during po wer f ailures and even when the unit is fire hazard, replace with same type fuse. For fuse rating refer to unplugged. The unit must be plugged in order to char ge the the marking adjacent to the symbol. back-up system. The memory preserv ation period after the unit has been Ce symbole indique que le fusible utlise est a rapide. unplugged v aries depending on climate and placement of the Pour une protection permanente, n'untiliser que fusibles de unit. On the average, memory contents are protected over a period of a fe w weeks after the last time the unit has been meme type. Ce darnier est la qu le present symbol est unplugged. This period is shorter when the unit is exposed to a appse. highly humid climate. CIRCUIT NO. PART NO. DESCRIPTION 5.Setting the Voltage selector (Worldwide models F901 252199 10A-UL/T-314,Fuseonl y) F902 252077, 4A-SE-EAK, 252243 or 4A-SE-TL250V or Worldwide models are equipped with a voltage selector to conform with 2 local power supplies. Be sure to set this switch to match the voltage of 252277 4A-SE-TL250V,Fuse the power supply in your area before plugging in the unit. F903 252075, 2.5A-SE-EAK, 1. Determine the proper voltage for your area: 220-230 V or 252241 or 2.5A-SE-TL250V or 120 V. 252275 2.5A-SE-TL250V,Fuse
2. If the preset voltage is not correct for your area, insert a screw- F9501,F9502 252160 or 2.5A-UL/T-237 or driver into the groo ve in the switch. Slide the switch all the w a y 252254 2.5A-T/UL-ST2,Fuse
to the right (120 V) or to the left (220-230 V), which ever is 252075, 2.5A-SE-EAK, appropriate. 252241 or 2.5A-SE-TL250V or 252275 2.5A-SE-TL250V,Fuse F9503,F9504 252158 or 1.6A-UL/T-237 or 252252 1.6A-T/UL-ST2,Fuse
3 252073 or 1.6A-SE-EAK or 252239 1.6A-SE-TL250V,Fuse Note:
:120V model only