Panasonic CF-73SCUTSBM Service Manual - Page 110

Rear PCB 5 Rear-Spamp C

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Page 110 highlights

Rear PCB 5 Rear-Spamp Con 1 VC3SA R1092 2 33K 47K 03/01/25 Add R1077, HPIL. R1091 3 001:G7 BEEPSP C1032 0.1u R1032 0.01u C1109 R1077 0 HPIL 006:E7 22K SNDGND C1093 0.1u IC1009 NJM2904V-TE1 3+ SNDGND O1 SPAMPL SPKOL C1094 R1090 C1095 R1088 2 004:G8 0.22u 15K 0.22u 10K - 1000p 100K R1089 C1096 Av= - R1089 / R1088= - 10.0 0.22u C1103 4 SNDGND IC1011 NJM2072M-TE1 VC3SA fc=1/ (2* π *R1087 *C1096) = 10.6kHz 1 IN VCC 8 2 G/C OUT2 7 R1102 1K 3 A/O OUT1 6 AMPMUTE# VC3SA 1000p C1104 4 GND R/C 5 R1103 DMP8 JRC 6.3V + 1K + 6.3V C1105 0.1u SNDGND 5 R1096 C1106 47u C1108 47u 33K SNDGND SNDGND R1093 22K C1100 0.1u VC3SA 6 R1078 0 HPIR 006:A7 SNDGND IC1009 NJM2904V-TE1 5+ O7 SPAMPR IC1009 NJM2904V-TE1 8 V+ V4 C1107 0.1u SPKOR C1097 R1095 C1099 R1098 6 004:G9 0.22u 15K 0.22u 10K - 1000p 100K R1094 SNDGND C1098 7 SNDGND R1099 0 SNDGND VAMP 8 F1002 2152 KAB2402202NA31 63V 2A 1 9 MUTE Select circuit IC1010 TC7W66FU(TE12L) 006:C10;007:G6 PWRMUTE# AMPMUTE# 1 IN/OUT1 5 IN/OUT2 OUT/IN1 2 OUT/IN2 6 VC5 VC5 7 CONT1 VCC 8 Default PWRMUTE# (EC_MUTE=L) VC5 3 CONT2 GND 4 R1105 EC_MUTE R1109 10 001:G7;006:B10;006:D10 0 VC3 R1106 NU R1104 10K 3 10K 6 2 XP0421300L Q1017 TOSHIBA 004:C5 MUTESEL R1108 NU 5 XP0421300L 1 Q1017 4 11 SPAMPL SPAMPR 2 SPAMP CN CN1006 SM09B-SRSS-TB 9 8 7 6 5 4 3 2 1 SNDGND JST A B C D E F G H I J

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SPKOR
004:G9
SPKOL
004:G8
BEEPSP
001:G7
C1032
0.1u
R1032
47K
VAMP
SNDGND
SPAMPL
SPAMPL
VC3SA
R1088
10K
C1093
0.1u
R1089
100K
R1090
15K
C1094
0.22u
R1091
22K
C1096
1000p
SNDGND
R1092
33K
NJM2904V-TE1
IC1009
-
2
1
O
+
3
NJM2904V-TE1
IC1009
V-
4
V+
8
SNDGND
VC3SA
C1097
0.22u
R1093
22K
SPAMPR
R1094
100K
R1095
15K
R1096
33K
SNDGND
VC3SA
R1098
10K
NJM2904V-TE1
IC1009
-
6
7
O
+
5
C1100
0.1u
SM09B-SRSS-TB
CN1006
JST
SPAMP CN
9
8
7
6
5
4
3
2
1
SPAMPR
SNDGND
R1099
0
R1077
0
HPIL
006:E7
R1078
0
HPIR
006:A7
KAB2402202NA31
F1002
2A
63V
2152
2
1
SNDGND
NJM2072M-TE1
IC1011
JRC
DMP8
1
IN
2
G/C
3
A/O
4
GND
8
VCC
7
OUT2
6
OUT1
5
R/C
C1103
0.22u
C1104
1000p
SNDGND
VC3SA
R1102
1K
R1103
1K
C1105
0.1u
SNDGND
SNDGND
C1095
0.22u
AMPMUTE#
6.3V
C1106
47u
+
C1099
0.22u
SNDGND
C1098
1000p
TC7W66FU(TE12L)
IC1010
TOSHIBA
1
IN/OUT1
5
IN/OUT2
7
CONT1
3 CONT2
4
GND
8
VCC
6
OUT/IN2
2
OUT/IN1
MUTESEL
004:C5
PWRMUTE#
006:C10;007:G6
AMPMUTE#
VC5
VC5
R1104
10K
XP0421300L
Q1017
5
3
4
XP0421300L
Q1017
6
2
1
VC5
R1105
10K
R1108
NU
EC_MUTE
001:G7;006:B10;006:D10
R1109
0
R1106
NU
VC3
C1107
0.1u
6.3V
C1108
47u
+
SNDGND
C1109
0.01u
fc=1/ (2*
π
*R1087 *C1096) = 10.6kHz
Av= - R1089 / R1088= - 10.0
03/01/25
Add
R1077, HPIL.
MUTE Select circuit
Default PWRMUTE# (EC_MUTE=L)
1
2
3
4
5
6
7
8
9
10
11
A
B
C
D
E
F
G
H
I
J
Rear PCB 5 Rear-Spamp C
on