Panasonic SA-AK52 - Buffer Amplifier and Muting Circuit Schematics

+B
ASP IC
IC301
BH3874AKS2
IC302
M5218AP
I/O EXPANDER
BU2090AF-E2
IC601
IC304
KIA4558FEL
+B
I/O EXPANDER
IC602
BU2090AF-E2
MICROPROCESSOR
IC600
M38B79MFA053
ANALOG SWITCH
IC305
TC4052BFNELM
EEPROM INTERFACE
IC603
93LC46B
HPFL2(R)
CD SIGNAL
FROM CD UNIT
RECL(R)
INLD(R)
AUX
JK305
47(48)
17
(20)
HPFL1(R)
INLB(R)
INLA(R)
INLC(R)
41(42)
45(46)
43(44)
23~27
HPFL3(R)
BASS1~5
OUTL(R)
32
(31)
63
(1)
18
Q601
POWER
RESET
CONTROL
/RESET
Z940
29
RMT
ECONO
91
DCDET2
34
SWITCH
Q307
D307
KEY3 KEY1
2~4
KEY SW
SYNC
32
SOUND
ANAZING
OUTPUT BUFFER
12-BIT SHIFT REGISTER
PCONT
10
LATCH
LED_CTL
/CD
13
CONTROL
CIRCUIT
DATA
CLK
2
3
MUTE_A
9
SWITCH
Q600
MUTEA
SER2
Q300
MUTING
SER1
MUTEA
Q400(Q200)
64
(2)
3
(5)
4
(6)
7
(9)
8
(10)
11
(13)
12
(14)
+B
+B
18
(21)
19
(22)
B C
51(52)
38
BPOUT A
36 37 39
SCK
35
DUAL
OP AMP
SI
34
D650
SER2 SER3 SPE
14
15
BUFFER
AMP
F4L2(R) F4L1(R) F3L2(R) F3L1(R) F2L2(R) F2L1(R) F1L2(R) F1L1(R)
A B C
FILTER
FILTER
FILTER
2
3
EE_CS/REG_IN
90
1
D651
AUDIO
MUTING
CONTROL
Q306
A
D618
Q450
(Q250)
MUTING
SWITCH
Q309,Q310
MUTING
SWITCH
MUTING
SWITCH
G5~G1
+B
4~8
SWITCH
Q311
D603,D604,
D903,D904
NAS_A CTRL
11
NAS_B CTRL
12
SWITCH
9
10
B
A
3~0X
MIC
56
VR930
MIC AMP
Q930,Q931
MIC
JK930
+B
44
Q699
SWITCH
NC
OUTPUT BUFFER
12-BIT SHIFT REGISTER
LATCH
11~13
CONTROL
CIRCUIT
DATA
CLK
2
3
+B
SER4
D572,D573
11~15
32
SA-AK52
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