Circuit Diagram (Guitar Input Board); Circuit Diagram (Mic Input Board) - Roland AC-33 Service Notes

Feb. 2010

Circuit Diagram (Guitar Input Board)

fig.d-guitar-input.eps@L
0.25Vrms

Circuit Diagram (Mic Input Board)

fig.d-mic-input.eps@L
0.0062Vrms
0.0123Vrms
MIC/LINE INPUT
32
1
3
2
R410
5.6k
R418
5.6k
AGND_MC AGND_MC
5
4
2
3
7
L400
8
JUMPER 5mm
1
JK401
YKB21-5006
FGND
L401
JUMPER 5mm
0.23Vrms
V_MC+10V
D402
1SS133 T-77(PB FREE)
R400 D403
1SS133 T-77(PB FREE)
100
C402
C400
10uF
1000pF
50V
R401
100k
AGND_MC AGND_MC
V_MC+10V
R414 R402
100k
100
C404
D404
10uF
C401
50V 1SS133 T-77(PB FREE)
1000pF
D405
1SS133 T-77(PB FREE)
AGND_MC
AGND_MC
AC-33
C413
180pF
R415
5.6k
2
R405
C415
5.6k
3
C403 220pF
IC400
220pF
NJM14558D
R406
5.6k
R416
5.6k
V_MC+10V
C420
10uF
50V
C421
0.1uF
AGND_MC
0.0123V
C412
0.47uF
50V
1
V_MC+1_2V
IC400
NJM14558D