Yamaha AV-S77 Service Manual page 13

2. DSP Through
In the DIGITAL input mode, AC3/PCM AUDIO signal is automatically identified. There are 3 sub-menu
items.
YSS918-SRAM
The main L/R signal is sent through AC3Dav into DSP. After passing through SRAM,
the main L/R signal is output through L+R and C/SW and RL/RR signals through
(L+R)/2.
ANALOG IN
DIGITAL IN
AUX IN : – 20dBV, Both ch
VOLUME : MAX
CN301 (Page 31, G3)
MAIN L (1kHz) : – 20dBV
MAIN R (1kHz) : – 20dBV
SUBWOOFER (30Hz) : – 34dBV
REAR L (1kHz) : – 26dBV
REAR R (1kHz) : – 26dBV
CENTER (1kHz) : < – 45dBV
YSS918
The main L/R signal is sent through AC3Dav into DSP. The main L/R signal is output
through L+R and C/SW and RL/RR signals through (L+R)/2.
ANALOG IN
DIGITAL IN
AUX IN : – 20dBV, Both ch
VOLUME : MAX
CN301 (Page 31, G3)
MAIN L (1kHz) : – 20dBV
MAIN R (1kHz) : – 20dBV
SUBWOOFER (30Hz) : – 34dBV
REAR L (1kHz) : – 26dBV
REAR R (1kHz) : – 26dBV
CENTER (1kHz) : < – 45dBV
CODEC.AD AC3Dav(YSS918)
CS4227
DECODER
DIR2
YM3436
CODEC.AD AC3D2av(YSS918)
CS4227
DECODER
DIR2
YM3436
DSP
(L+R)
(L+R)
CODEC.DA
(L+R)
/2
(L+R)
CS4227
/2
256K SRAM
DSP
L/R
L/R
CODEC.DA
L/R
L/R
CS4227
256K SRAM
The shaded square means that the element included in it does not operate.
AV-S77
MAIN L
MAIN R
REAR L
REAR R
CENTER
SUB WOOFER
MAIN L
MAIN R
REAR L
REAR R
CENTER
SUB WOOFER
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