Pro Logic - Yamaha DSP-AX1/RX-V1 Service Manual

DSP-AX1/RX-V1

4. PRO LOGIC

The input data is automatically identified in the priority order of PCM > Analog. DTS is inhibited.
There are three sub-menu items.
Either Pro-logic (auto input balance turned off ) or EFFECT OFF (analog through) is selected.
4. PRO LOGIC
YSS918
YSS918 [Remote control code: 7A—9C (SET DOWN)]
When the analog, PCM audio or DOLBY DIGITAL 2/0 mode is used, L, R, C, S signals are pro-logic
decoded in YSS918 and output.
When the DOLBY DIGITAL mode other than 2/0 is used, the pro logic function does not work and they
are muted.
(2-ch source) ... Muted in the case of multi-ch source
• AC3D2av outputs signals using PRO LOGIC decoding operation with the auto input balance off (with
-3dB gain).
• DSP6#1 outputs the PRO LOGIC output signals to L/R (SD610), C(SD611, L only). Also, it passes
the S signal through the external RAM and -3dB processing and outputs it to RLef/RRef (SD613).
• DSP6#2 outputs the output signals of DSP6#1 to L/R (SD620), RL/RR (SD623). Also, it outputs the
C signal to C (SD621, L only) through the external RAM.
IC2
DIR5
DIGITAL
YSD917
IC3
A/D
ANALOG
AK5383
Reference
CD ANALOG IN
VOLUME
PRE OUT
MAIN L (1kHz)
MAIN R (1kHz)
CENTER (1kHz)
REAR CENTER (1kHz)
FRONT L (1kHz)
FRONT R (1kHz)
REAR L (1kHz)
REAR R (1kHz)
SW L (50Hz)
SW R (50Hz)
SW MONO (50Hz)
21
4. PRO LOGIC
YSS908
IC7
DSP6#1 YSS910
IC6
L/R
AC3D2av
C/S
YSS918
C
PRO LOGIC
IC4
S
IC33 4M DRAM
IC34
: – 20dBV, Both ch
: MAX
: – 43.0dBV
: – 39.0dBV
: – 0.2dBV
: – 47.5dBV
: – ∞ dBV
: – ∞ dBV
: – ∞ dBV
: – ∞ dBV
: – ∞ dBV
: – ∞ dBV
: – 44.8dBV
4. PRO LOGIC
EFFECT OFF
L/R
FILTER
DF1704
IC57
IC8
DSP6#2 YSS910
C
FILTER
DF1704
L/R
C
RLef/RRef
C
RL/RR
FILTER
DF1704
IC35
4M DRAM
CD ANALOG IN : – 20dBV, L ch only
VOLUME : MAX
PRE OUT
MAIN L (1kHz) : – 3.5dBV
: – ∞ dBV
MAIN R (1kHz)
CENTER (1kHz) : – 42.4dBV
: – ∞ dBV
REAR CENTER (1kHz)
: – ∞ dBV
FRONT L (1kHz)
: – ∞ dBV
FRONT R (1kHz)
REAR L (1kHz) : – 47.5dBV
REAR R (1kHz) : – 47.5dBV
: – ∞ dBV
SW L (50Hz)
: – ∞ dBV
SW R (50Hz)
SW MONO (50Hz) : – 44.8dBV
D/A
L
PCM1704
D/A
R
PCM1704
D/A
C
PCM1704
D/A
RL
PCM1704
D/A
RR
PCM1704