SUBWOOFER ch
2CH IN 0dB
(200m V)
-10dB
-20dB
-40dB
-30dB
+10dB
+20dB
DSP
DAC
PRE OUT
NJU72340A
SUBWOOFER
SUBWOOFER CHANNEL
PLD
PCM1690
CS49844A
-50dB
0dB (200m Vrm s)
-10dB
-20dB
-40dB
-30dB
+10dB
+20dB
-50dB
+30dB
-10dBFS
-20dBFS
-30dBFS
-40dBFS
PRE OUT
MUTE
+11.5dB
+14.5dB
300Vrm s
GAIN
ADJ.
+11.5dB
-50dBFS
PRE OUT
150Vrms
5M80ZT
AVRS740H/X1500H LEVEL DIAGRAM
-34dBFS(DIG.IN:PCM)
-37dBFS(A/D IN)
-40dBFS
DAC
AK4458
1.98Vrms=0dBFS
FULL SCALE LEVEL
DO LBY LIM IT LEVEL= 1.41Vrm s (ALL ch -3dBFS)
VO LUM E IC : NJU72343 NO N CLIP M AX SIG NAL LEVEL 4.2Vrm s
L.P.F G AIN = +6.5dB
(DIG.IN:DD)
PCM INPUT:-20dBFS L+R
ANA INPUT:200m Vrm s L+R 30Hz
DD INPUT:-30dBFS LFE 30Hz
- DIG ITAL IN
G AIN setting of M ASTER VO L 00dB
- ANALO G IN
-2.0dB
-2.0dB
=+11.5dB
=+14.5dB
(1)
(2)
+3.0dB
-0.5dB
-0.5dB
(3)
(4)
(1):Basic O FFSET of VO L=0dB (Indication valude)
(4):Correction of Subw oofer
(3):Voltage due to hardw are of analog input
(2):Fine-tuning by softw are Digital input
+14dB
+14dB
(5)
(5):O FFSET of A/D input
-2.5dB
LINE IN
Before Servicing
This Unit
Electrical
Mechanical
Repair Information
Updating
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