Sanyo PDP-32H1A, Service Manual

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Circuit Block Diagram
■
Audio
AUDIO
TERM A
AV1
L
R
L
R
PC1
TERM B
AV2
L
R
MONITOR
OUT
L
R
AV4
L
R
IC001
AUDIO CONTROL
MAIN
L
R
L
R
L
R
L
R
L R
IC1001 AV
SWITCH
2(L),4(R)
AV1
8(L),10(R)
AV2
5(L),14(R)
PC1
1(L),12(R)
PC2
(AV4)
3(L),13(R)
59(L),61(R)
PC
IC1002
SWITCH
52(L),54(R)
L
R
MONITOR
L
R
SELECTED
23(L),2(R)
IC002
Q-SOUND
13(L),11(R)
6(L),2(R)
7(L),1(R)
SURROUND
IC003
AMP
22(L),21(R)
SURROUND
16(L),15(R)
EFFECTED
1(L),24(R)
6(L),19(R)
IC121
BBE
BBE
7(L),1(R)
6(L),2(R)
IC031
HEAD PHONE
AMP
25(L),20(R)
23(L),22(R)
10(L),13(R)
IC071
MAIN DIGITAL
AMP
+
-
L
R
L
R
HEAD PHONE
SPEAKER X2
Signal Flow
Sound signals (L & R) from AV1 or AV2 are input to AV SW IC (IC1001) and selected.
Sound signals from PC1 or PC2 (AV4) are input to IC1001 too after selected by SW IC (IC1002) .
The selected signals are output to Monitor Out and also input to below ICs.
Q-Sound IC (IC002)
➔
AMP IC (IC003)
➔
Audio Control IC (IC001)
➔
BBE IC (IC121)
Finally signals from IC121 are input to Digital AMP IC (IC071) for speakers and AMP IC (IC031) for Head
Phone.