Panasonic SA-PM08 - Power Amplifier and Protection Circuits; Power Amplifier Stages and Protection Components

IC901
TA8255AH
POWER AMP
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25
STBY MUTE
OUT4(+) GND4
OUT4(
-
)
Vcc2
OUT3(
-
)
GND3
OUT3(+)
RIP
IN3
IN4
PRE GND
IN2 IN1 AUX IN
OUT1(+)
GND1
OUT1(
-
)
Vcc1
OUT2(
-
)
GND2
OUT2(+) TJ DET
MUTE
Rch
Lch
IC902
TA8255AH
POWER AMP
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25
STBY MUTE
OUT4(+) GND4
OUT4(
-
)
Vcc2
OUT3(
-
)
GND3
OUT3(+)
RIP
IN3
IN4
PRE GND
IN2 IN1 AUX IN
OUT1(+)
GND1
OUT1(
-
)
Vcc1
OUT2(
-
)
GND2
OUT2(+) TJ DET
MUTE
CENTER(6 )
SURROUND
(6
)
HIGH
Lch
C931
0.1
R939
1
R978
1.2
C933
0.1
R941
1
R980
1.2
LOW
Rch
HIGH
LOW
FRONT(6 )
C947
0.1
R943
1
R984
1.2
C951
0.1
R945
1
C953
0.1
R947
1
R986
1.2
C946
0.1
R942
1
R982
1.2
R985
1.2
C926
0.1
R937
1
R976
1.2
C943
470P
R967
15K
C939
470P
R972
15K
R969
6.8K
C950
0.1
R944
1
R981
1.2
C952
0.1
R946
1
R983
1.2
C920
0.1
R930
2.2
C921
0.1
R929
2.2
C930
0.1
R938
1
R977
1.2
C925
0.1
R934
1
R973
1.2
C927
0.1
R936
1
R975
1.2
C932
0.1
R940
1
R979
1.2
C942
470P
R966
4.7K
R928
4.7K
C938
470P
R968
4.7K
C936
470P
R965
4.7K
C935
35V47
C923
50V1
C922
50V1
C934
35V47
Q905,906
KRC104STA
MUTING CONT.
C941
470P
Q906
Q905
R970
10K
C928
0.22
R932
RSFMB70KT-L
R971
10K
10
2
1
3
4
5
6
7
8
9
C929
0.22
C949
0.22
R933
RSFMB70KT-L
C948
0.22
R841
10
R842
10
R843
10
C850
0.01
R869
1K
R840
1K
C847
25V330
R839
5.6K
C849
0.01
C848
1000
CN903
C812
1000
R867
1.5K
R836
1.5K
D817
UDZSTE178R2B
R868
75
R837
75
C820
25V100
C817
0.01
R834
10
R833
10
R815
10
C846
0.01
R835
5.6K
R838
1K
Q818
2SB1566E
REGULATOR
Q816
2SD2395E
REGULATOR
Q817
2SA1162GRT5T
STABILIZER
R964
22K
C955
6800
C954
6800
C
B
A
B
A
C
A
B
SCHEMATIC DIAGRAM - 21
Q904
KRC104STA
SWITCHING
(STANDBY)
C924
0.1
R935
1
R974
1.2
C937
470P
JK903
JK902
JK901
SPEAKERS
C956
0.047
C963
0.047
C958
0.047
C964
0.047
C957
0.047
C965
0.047
C959
0.047
C966
0.047
C961
0.047
C967
0.047
C960
0.047
C968
0.047
C962
0.047
C969
0.047
L948
L949
L950
L952
L951
L955
L957
L959
L961
L954
L956
L958
L960
L948-961
ZBF506D-00TA
For [GK] area.
L953
For [GCS] area.
For [GK] area.
For [GK] area.
For [GCS] area.
:NEGATIVE VOLTAGE LINE
:POSITIVE VOLTAGE LINE
:AUDIO SIGNAL LINE
:SURROUND SP. DRIVE SIGNAL LINE
:CENTER SP. DRIVE SIGNAL LINE
- 8.3V
- 14.5V - 7.7V
- 8.3V
- 0.6V
8.2V
12.9V7.7V
0V
0V
4.2V
5.2V
0V
0V
0V 0V 0V
16.6V
0V 0V 0V 0V 0V 0V
16.6V
0V 0V
0.3V
0V 0V 0V 0V
4.2V
7.2V
7.2V
16.6V
7.2V 7.2V
0V
0V 0V 0V
6.8V
7.2V
7.2V
16.6V
7.2V 7.2V
0V 2V
- 7.7V
7.7V
9V