Onkyo TX-8020B - Schematic Diagrams - Part 8 (Tone;Balance;Selector); Tone Control Circuit Diagram; Balance Control Circuit Diagram; Input Selector Switch Circuit

TX-8020
SCHEMATIC DIAGRAMS-08(PART-8)
TONE/ BALANCE/ SELECTOR SECTION
TX-8020
TITLE
APPROVCHECKDESIGN SHEET
DRAWING No.
SELA
SELB
BASS_B
BASS_B
BASS_A
+3.3VDIS
GNDDIS
GNDDIS
+3.3VDIS
+3.3VMPU
+3.3VMPU
BALANCE
TREBLE_A
TREBLE_B
GNDDIS
GNDDIS
GNDDIS
223K
C753
50V
103K
C756
50V
103K
C759
50V
103K
C758
50V
103K
C757
50V
223K
C752
50V
103K
C754
50V
103K
C755
50V
223K
C751
50V
JL702B
NSCT-7P878
1
2
3
4
5
6
7
JL702A
NSCT-7P878
1
2
3
4
5
6
7
+3.3VDIS
BALANCE
GNDDIS
BASS_B
SELB
+3.3VDIS
TREBLE_B
GNDDIS
SELA
TREBLE_A
GNDDIS
BASS_A
R760
10k
R751
1k
R762
10k
R757
10k
R763
10k
R758
10k
R764
10k
R756
10k
R765
10k
R752
470k
R754
10k
R759
10k
R761
10k
R755
10k
R753
20KB
1
2
3
4
5
6
S753
EVEHC1F2524B
1
3
4 5
2
S751
EVEHC1F2524B
1
3
4 5
2
S752
EVEHC1F2524B
1
3
4 5
2
TP2
+3.3VMPU
JL701A
NSCT-7P878
1
2
3
4
5
6
7
JL701B
NSCT-7P878
1
2
3
4
5
6
7
GNDDIS
BALANCE
BAETC1442
TREBLE
BASS
INPUT
SELECTOR
2013.04.09
Display Section (Part-8)
K.Ikeda S.Murayama
2013.04.09
TX-8020
RC-202985
2013.04.09
H.Suda
MODEL NO. TX-8020 SCHEMATIC DIAGRAM (Part-8) DISPLAY SECTION
8 14
U0032
INPUT/ BASS PC BOARD
U0033
TREBLE / BALANCE PC BOARD
BAETC-1446
A
1
2
3
4
B C D E