Toshiba 28YT56, Service Manual

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16
Audio inputs Main_L and Main_R is applied via voltage comparator LM393 to amplifier. PWM
swicthing outputs are then filtered by 33UH and 470NF.
SOUND PERFORMANCE
SOUND CALL UP TIME Max. 4 sec.
MAXIMUM AUDIO OTPUT POWER (RF INPUT) 10W
MAXIMUM AUDIO OTPUT POWER (EXTERNAL INPUT) 10W
THD AT MAXIMUM AUDIO OUTPUT POWER (RF INPUT) %10
THD AT MAXIMUM AUDIO OUTPUT POWER (EXTERNAL INPUT) %10
THD AT 50 mW AUDIO OUTPUT POWER (RF INPUT) %3 (IC spec.)
THD AT 50 mW AUDIO OUTPUT POWER (EXTERNAL INPUT) %3 (IC spec.)
SIGNAL TO NOISE RATIO (RF INPUT) 50 db.
SIGNAL TO NOISE RATIO (EXTERNAL INPUT) 40 dB
SIGNAL TO BUZZ RATIO 40 dB
CROSSTALK: TV TO AV - AV TO TV 60 dB
RESIDUAL SOUND (RF INPUT) 20 mW/rms
RESIDUAL SOUND (EXTERNAL INPUT) 20 mW/rms
FREQUENCY RESPONSE (RF INPUT) 100 Hz – 10 kHz
FREQUENCY RESPONSE (EXTERNAL INPUT) 100 Hz – 10 kHz
BASS FREQUENCY RESPONSE (RF INPUT) 10 ± 2 dB
BASS FREQUENCY RESPONSE (EXTERNAL INPUT) 10 ± 2 dB
TREBLE FREQUENCY RESPONSE (RF INPUT) 10 ± 2 dB
TREBLE FREQUENCY RESPONSE (EXTERNAL INPUT) 10 ± 2 dB
POP NOISE 5 Vpp
HORIZONTAL HUM NOISE 15 mVrms
VERTICAL HUM NOISE 15 mVrms
VIDEO NOISE ON THE AUDIO OUTPUT 50 mVpp