Level Diagram - Marantz AV7703 Service Manual

LEVEL DIAGRAM

FRONT ch
NJU72750
LINE IN
－
MIC IN
＋
EXT IN
2.82Vrms:A/D FULL SCALE
+20dB
851mVrms
+10dB
LINE IN/EXT IN
200mV 0dB
-10dB
+37.60dB
-20dB
MIC IN
11.48mVrms
ACM2(DM-A409)Sensitivity:
-38.8dB/Pa=11.48mV/Pa at94dBSPL@Operation Voltage 5.0V
(94dBSPL is expected to -11dBFS)
-30dB
-40dB
AK4458
＋
PLD
AK5358
D/A
－
TO ZONE2
DSP
x4pcs
TO ZONE3
DAC:AK4458
1.98Vrms=0dBFS
ADC:AK5358
-8.5dB
0dBFS=1.06Vrms
-10dBFS
-8.5dB
AD IN=319mVrms
-10dBFS
SW:YES
-20dBFS(DIG.IN)
-23dBFS(A/D IN)
-20dBFS
-8.5dB
AD IN=75mVrms
-30dBFS
SW:NONE
-32dBFS(DIG.IN)
-30dBFS
-35dBFS(A/D IN)
-40dBFS
-40dBFS
AV7703
LEVEL DIAGRAM
FRONT ch
NJU72343
NJU72751
＋
－
Volume IC: NJU72343 NON CLIP MAX SIGNAL LEVEL 4.2Vrms
FULL SCALE LEVEL = 2.0Vrms
DOLBY LIMIT LEVEL = 1.41Vrms (ALL ch -3dBFS)
L.P.F GAIN = +0.4dB
-2.5dB
+0.5dB
+9.5dB
+12.5dB
GAIN Setting of MASTER VOL 00dB
･ W S Y : S E ( I D I G A T ) L
･SW:YES (ANALOG)
･SW:NONE (DIGITAL)
･SW:NONE (ANALOG)
①:Basic OFFSET of VOL=0dB (indication valude)
②:Fine-tuning by software Digital input
③:Voltage due to hardware of analog input
④:OFFSET of SW NONE
50
＋
NJU72751
HDAM
GAIN
ADJ.
Headroom:3dB
+10dB
-2.5dB
LINE IN/EXT IN
2 - 0 . B d 0 - 5 . B d = 2 - 5 . B d
-2.0dB -0.5dB +3.0dB = +0.5dB
-2.0dB -0.5dB +12.0dB = +9.5dB
-2.0dB -0.5dB +12.0dB +3.0dB = +12.5dB
① ② ③ ④ ⑤
ANALOG
H/POUT
ATT
Balanced
OUT
PRE OUT
+30dB
+20dB
+10dB
-4dB
237mVrms/33Ω
H/POUT
200mVrms
PRE OUT
150mVrms
-10dB
-20dB
-30dB
-40dB