SUBWOOFER ch
REV AMP
SW SUM
REV AMP
D/A O UT
LPF
PRE AMP1
ELECTRIC
VOLUME
DSP OUT
D/A
SW WOOFER
MUTE
PREOUT
NJU72340AFH3
2CH IN 0dB
(200m V)
-10dB
-20dB
10dB
20dB
30dB
40dB
AVRS540BT/X550BT/X250BT LEVEL4 DIAG RAM
SUBWOOFER
316mVrms
VO L 00
+15dB
PREOUT
SUBWOOFER
D/A
CS42528
0dBFS=5Vpp
DIFF. OUT
=1.77Vrms
-30dBFS(DIG.IN)
0dBFS
-10dBFS
-40dBFS
0dB
-10dB
-20dB
10dB
20dB
30dB
40dB
-20dBFS
FULL SCALE LEVEL=2Vrm s
DO LBY LIM IT LEVEL (ALL ch-3dBFS)
SUBWOOFER ch
+8.2dB
DD Config1
-37dBFS(A/D IN)
+8.2dB
+12dB
500m Vrm s
PREOUT
SUBWOOFER
Before Servicing
This Unit
Electrical
Mechanical
Repair Information
Updating
28