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TX-DS494/HT-R490
Ref. No.3676
052001
SERVICE MANUAL
AV RECEIVER
TX-DS494/HT-R490
ONTR
RE M OTE C4 44M OLLER
RC-
STANDBY/ ON SLEEP DIMMER DISPLAY
INPUT SELECTOR
CD TAPE PHONO TUNER
/ DTS DVD VIDEO 1 VIDEO 2
DISPLAY STEREO SURROUND DSP MASTER VOLUME
LISTENING MODE TUNER
STANDBY/ON SUR MODE SW MODE AUDIO SEL PRESE T
MODE
TV CABLE SATELLITE VCR
STANDBY/ ON DVD CD TAPE
STANDBY CH T V VOL CH
POWER
DIMMER
ON OFF
SP SEL SW MODE DIGITAL INPUT FM MODE MEMORY TUNING PRESET DISC MUTING
A SPEAKERS B
CLEAR
TV/ VCR T V VOL
TOP MENU MENU
ENTER
VOLUME
AUDIO DVD VIDEO 1 VIDEO 2 TAPE FM AM PHONO CD
SELECTOR
RETURN SETUP
TEST TONE CH SEL LEVEL
VCR
PHONES BASS TREBLE
AV RECEIVER TX-DS494
TX-DS494
Black,Silver and Golden model
BMDD 120V AC, 60Hz
BMPP,SMPP,BMPA,GMPA 230-240V AC, 50Hz
BMWT,BMWR,GMWT,GMWR 120/220-230V AC, 50/60Hz
GMGT 220-230V AC 50/60Hz
HT-R490
Black model
120V AC,60Hz
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.
TX-DS494/HT-R490
SEPECIFICATIONS
############
AMPLIFIER SECTION
Continuous Average Power output (FTC) Capture Ratio: 2.0 dB
All channels: 55 watts per channel min. RMS at 8 ohms, Image Rejection Ratio
2 channels driven from 20 Hz to 20 kHz North American models: 40 dB
with no more than 0.08% total harmonic Other models: 85 dB
distortion. IF Rejection Ratio: 90 dB
70 watts min. RMS at 6 ohms, 2 channels Signal-to-Noise Ratio
driven from 1 kHz with no more than Mono: 76 dB
0.1% total harmonic distortion. Stereo: 70 dB
Continuous Power output (DIN) 75 watts 5 at 6 ohms Alternate Channel Attenuation: 55 dB
Maximum Power output (EIAJ) 100 watts 5 at 6 ohms Selectivity: 50 dB (DIN)
Total Harmonic Distortion: 0.08% at rated power (Front) AM Suppression Ratio: 50 dB
IM Distortion: 0.08% at rated power (Front) Total Harmonic Distortion
Damping Factor: 60 at 8 ohms (Front) Mono: 0.2%
Input Sensitivity and Impedance Stereo: 0.3%
Frequency Response: 30 Hz-15 kHz,