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Model
SA-PT464P SA-PT470GA SA-PT470GN SA-PT470PU SA-PT475EE SC-PT475EE
Pages
21
Size
1.16 MB
Type
PDF
Document
Service Manual / Supplement
Brand
Device
Audio / DVD HOME THEATER SOUND SYSTEM
File
sa-pt464p-sa-pt470ga-sa-pt470gn-sa-pt470pu-sa-pt47.pdf
Date
PREV: Panasonic SA-PT464P / SA-PT470GA / SA-PT470GN / SA-PT470PU / SA-PT475EE Service Manual / Parts change notice

Panasonic SA-PT464P / SA-PT470GA / SA-PT470GN / SA-PT470PU / SA-PT475EE / SC-PT475EE Service Manual / Supplement ▷ View online

13
3.4.
SMPS Circuit (SA-PT470PU)
With reference to original service manual (section 17.6) on page 128-129 for model no. SA-PT470PU-K
4
5
2
1
P1
B
TO
MAIN CIRCUIT 
(H2901*)
IN SCHEMATIC
DIAGRAM - 9
B
TO
MAIN CIRCUIT 
(H2900*)
IN SCHEMATIC
DIAGRAM - 9
TO SMPS
SECTION (2/2)
 SA-PT470
PU
 SMPS CIRCUIT
2/2
1/2
: +B SIGNAL LINE
: -B SIGNAL LINE
G
 SMPS CIRCUIT
SCHEMATIC DIAGRAM - 14
A
B
C
D
E
F
G
H
1
2
3
4
5
6
7
8
9
10
11
12
13
14
1
2
3
4
5
6
7
8
9
10
11
12
13
14
K4
0
50V22
C5798
C5897
INVERTER
ECO CONTROL
0.1
B0EAMM000057
D5896
22
R5798
R5893
39K
R5895
15K
4
3
1
2
PC5702
B3PBA0000402
SYNC SWITCH
MA2YF8000L
D5730
820K
R5708
330
R5894
SHUNT REGULATOR
4
3
1
2
B3PBA0000402
FEED BACK
PC5799
2.2K
R5890
C5898
0.1
F1BAF1020020
1000P
C5705
0
R5896
R5786
200K
R5891
33K
R5892
4.7K
C5899
10V1000
9
10
7
8
1
2
3
4
5
6
ETS19AB2A6AG
BACKUP TRANSFORMER
T5751
Q5898
B1ABCF000176
SYNC
100K
R5887
100
R5886
B0BC035A0007
D2901
B0EAMM000057
D2903
Q2900
B1BABK000001
D2906
B0JAME000029
J0JBC0000041
L2916
L2915
J0JBC0000041
C2912
16V100
R2902
SWITCHING TRANSFORMER 
PSAVE CONTROL 
47
C2902
5600P
L2914
J0JBC0000041
8
9
11
12
10
2
5
6
3
4
1
7
14
13
CN2016
16V33
C2900
47K
R2914
35V33
C2903
D2908
B0EAMM000057
G0C390JA0055
L2910
D2909
MAZ82400HL
1
2
FP2901
1A
5
3
4
8
7
6
2
1
9
T2900
G4D1A0000117
SYS5V
A
R
3
2
C
1
IC5899
C0DAEMZ00001
D5793
B0HAMP000094
C5790
2200P
D5798
B0EAMM000057
R2910
-7V REGULATOR
POWER CONTROL
1.5
L2902
G0A101ZA0028
R2908
560
R2907
2.7K
16V10
C2909
R2913
0
L2901
G0A220GA0026
E2900
C2908
16V47
Q2903
2SC3940ARA
R2905
39
G0A200D00002
L2911
0.01
C2939
C2955
25V220
C2922
6.3V820
D2952
1
2
3
B0BC010A0007
R2912
2.7K
R2920
3.9K
R2921
390
C2907
1000P
2SB0621AHA
Q2901
B1ADCF000001
Q2902
R2911
1K
1000P
C2924
R2919
1K
D2904
B0JCPD000025
4
2
1
3
5
7
8
5
1
2
4
3
IC5799
MIP2F20MSSCF
SWITCHING REGULATOR
D5797
0
470K
R5795
C5795
1000P
0.1
C5796
R5797
15K
DCDET
-13V
C5896
0.1
SYS5V
SYNC
VSS
DC_18V
DC_18V
PCONT
R5866
100K
R5818
100
C5820
6.3V2200
ECO_CTL
R2010
1K
ECO_CTL
6.8K
R5805
B1ABCF000176
Q5863
C5863
4.7
4.7K
R5865
C5870
0.01
22
R5829
R5817
2.2K
0.1
C5818
15K
R5806
0.1
C5810
L2903
G0A101ZA0028
560
R2953
C2905
1000P
C2906
10V100
3.9K
R2952
MOT_+9V
4.7K
R5802
100V0.1
C5817
VDD
4
2
1
3
5
R5814
8.2K
C2930
10V680
B0BC010A0007
D2951
1.2K
R2923
6.8K
R2906
0.01
C2929
 C2923
25V220
C2927
0.01
5
6
1
3
4
2
8
7
CN2017
B0JCPD000025
D2913
1K
R2922
150K
R5804
R5803
0
D5725
MAZ80620ML
R5807
330
330
R5809
R5730
1K
A
R
3
2
C
1
C0DABFC00002
IC5801
2.2K
R5808
4
3
1
2
B3PBA0000402
FEED BACK
PC5720
+7V
+7V REGULATOR
+9V
+9V
+9V
AGND
GND
OUT
INV
STBY
VCC
NC
ECO_CTL
-7V
DC_DET2
PCONT
+18V.-12V_GND
+18V.-12V_GND
SYS_GND
SYS_GND
SHUNT REGULATOR
AGND
OUT
VCC
GND
INV
STBY
+5.3V
+5.3V
+5.3V
F-
F+
F+
F+
GND
GND
-VP
F-
-VP
F-
-VP
SYNC
5.3V
MOTOR_+9V
+18V
SYS5VGND
SYS5V
MGND
MGND
MGND
TUNER_+9V
5.3V
FAN GND
AGND
+18V
FB
VCC
S
D
S
FB
VDD
VCC
TR
R5864
15K
SWITCHING REGULATOR
C0DAAMH00012
C0DAAYH00001
IC2903
CHANGE
R2935
4.7K
1M
C2931
0.47
ADD
C0DAAYY00042
C0DAAYG00001
IC2900
CHANGE
R2930
4.7K
1M
SWITCHING REGULATOR
C2932
0.1   0.47
CHANGE
CHANGE
5.6K
4.7K
R2900
14
4
2
1
5
P1
F
TO
D-AMP CIRCUIT 
(CN5500)
IN SCHEMATIC
DIAGRAM - 13
H
TO
AC INLET CIRCUIT 
IN SCHEMATIC
DIAGRAM - 16
 SA-PT470
PU
 SMPS CIRCUIT
: +B SIGNAL LINE
: -B SIGNAL LINE
2/2
1/2
TO SMPS
SECTION (1/2)
K
TO
VOLTAGE SELECTOR 
CIRCUIT 
IN SCHEMATIC
DIAGRAM - 16
G
 SMPS CIRCUIT
SCHEMATIC DIAGRAM - 15
15
16
17
18
19
20
21
22
23
24
25
26
27
28
15
16
17
18
19
20
21
22
23
24
25
26
27
28
A
B
D
E
F
H
G
C
MA2J11100L
D5727
R5723
33K
R5724
33K
R5706
270K
R5704
120K
C5727
2200P
2200P
C5722
R5726
0.1
C5747
820P
C5723
470P
1
C5730
47K
R5733
6
5
4
3
2
1
7
IC5701
C5HACYY00003
100
R5732
0
K5721
C5725
0.1
D5732
MAZ83000ML
FAN_18V
R5898
4.7K
47K
R5899
D5805
B0EAMM000057
C5813
35V330
C5841
 0.01
0.01
C5839
C5811
0.01
D5804
B0EAMM000057
0.01
C5827
3
2
1
ZJ5803
B0HFRJ000012
D5803
C5840
 0.01
C5842
0.01
R5845
1K
120
R5842
R5844
5.6K
B1ABCF000176
Q5841
C5843
1
3
1
2
B0HBSM000043
D5801
FAN_18V
DCDET
C5823
0.1
MA2J11100L
D5842
VSS
2.2K
R5832
12K
R5840
MAZ82700ML
D5840
MAZ80750ML
D5841
FAN_18V
DC DETECT
15K
R5841
VDD
VSS
MA2J11100L
D5843
0.1
C5832
C5831
0.1
5
6
1
3
4
2
8
7
H5801*
QR5840
UNR221400L
SYS5V
C5805
35V2200
PCONT
DCDET
MA2J11100L
D5807
0.01
C5800
3
1
2
B0HBSM000054
D5802
C5808
35V2200
VDD
R5834
2.2K
2.2K
R5843
C5816
25V220
-13V
DC_18V
C5799
400V10
4
3
1
2
D5799
B0EDKT000009
3
2
4
1
MA2J11100L
D5899
3
4
1
2
K6B1AEA00003
RY5701
R5705
120K
270K
R5707
T1.6AL 250V
F2
R5702
100K
B0EAMM000057
D5731
22
R5720
R5703
100K
3
2
1
B0ZAZ0000052
D5702
C5713
0.01
1K
1K
R5722
CURRENT LIMITING
SWITCH
D5729
B0EAMM000057
C5726
50V10
C5721
220P
MA2J11100L
D5724
R5725
2SC3940ARA
Q5720
D5721
MAZ82000ML
C5720
1000P
10K
R5721
MA2J11100L
D5723
MA2J11100L
D5726
D5722
MAZ82000ML
B1ABCF000176
Q5899
3
2
1
ZJ5801
F1BAF1020020
C5700
1000P
11
13
14
12
8
6
5
7
9
18
15
16
17
1
4
2
T5701
ETS42BN1A6AD
C5824
25V220
+18V.-12V_GND
SYS_GND
RELAY DRIVE
VDD
GND
VSS
VSS
GND
GND
GND
GND
VDD
FAN GND
FAN GND
FAN GND
FAN GND
FAN DC
FB
D
GND
VCC
FB
VCC
S
OLP/SS
RED
TL1*
TL2*
TL3*
TL4*
BLK
OCP/BD
SWITCHING REGULATOR
AMPGND
+30V
DRAIN
MAIN TRANSFORMER
-30V
GND
+FAN 18V
-12V
+18V
VCC
VIN
DC DETECT
C5815
0.1
C5812
0.1
400V330
C5712
D5901
0
BLU
WHT
C5711
400V330
B0FBAR000041
B0FBAR000043
CHANGE
D5701
15
3.5.
Main Circuit (SA-PT475EE)
With reference to original service manual (section 11.2) on page 79 for model no. SA-PT475EE-K
P1
C
TO
PANEL CIRCUIT 
(CN6904)
IN SCHEMATIC
DIAGRAM - 10
TO CO-PROCESSOR CIRCUIT 
(CN1701)
IN SCHEMATIC
DIAGRAM - 18
19
1
D
TO
AUTO SETUP 
SPEAKER CIRCUIT 
(H6501*)
IN SCHEMATIC
DIAGRAM - 11
J
TO
MIC CIRCUIT 
(H7000*)
IN SCHEMATIC
DIAGRAM - 17
SA-PT475EE
MAIN
 CIRCUIT
2/4
4/4
1/4
3/4
TO MAIN
SECTION (4/4)
: +B SIGNAL LINE
: -B SIGNAL LINE
: CD/DVD VIDEO INPUT SIGNAL LINE
: CD/DVD AUDIO INPUT SIGNAL LINE
: AUDIO OUTPUT SIGNAL LINE
: VIDEO OUTPUT SIGNAL LINE
: iPod VIDEO INPUT SIGNAL LINE
: FM SIGNAL LINE
: iPod/TV/MIC/AUX AUDIO INPUT SIGNAL LINE
15
16
17
18
19
20
21
22
23
24
25
26
27
28
A
B
D
E
F
H
G
C
B
 MAIN CIRCUIT
SCHEMATIC DIAGRAM - 7
TO MAIN
SECTION (1/4)
R2084
HP_MUTE
R2071
R2073
R2072
CEC_IN
CEC_OUT
ECS
IPOD_OC
ECK
EDA
R2068
ASP_DAT
ASP_CLK
R2091
220
220
220
R2069
R2002
10K
100
100
100
27K
R2053
R2092
TUN_SD
TUN_CLK
IPHONE_RST
KEY1
R2051
56K
R2021
56K
R2060
R2031
R2062
R2036
R2017
R2032
47K
R2066
220
220
220
220
220
220
220
47K
R2054
UART_TX
MUTE_C_S
RMT
UART_RX
VREF
RMT
JOG_A
DC_DET2
JOG_B
R2040
DVD_CMD
HP-LCH
HP-RCH
DC_DET1
SYNC
DVD_STAT
ECO_DAMP
DVD_CLK
PCONT
JOG_A
HOP_DA
FLD_STB
JOG_B
KEY2
FLD_OUT
FLD_CLK
18
16
14
8
9
11
12
10
2
3
1
5
7
6
4
13
15
17
19
CN2007
TUN_DO
MUTE_F_SW
MOD_DA
C2009
0.1
3
1
2
H2B100500007
X2001
ECK
ECS
R2045
R2038
47K
10K
10K
15K
15K
R2012
R2035
R2090
R2037
LEVEL SHIFTER
R2043
R2000
220
220
220
1K
R2078
R2029
220
220
220
R2004
R2050
R2061
INNER_SW
B1GBCFJJ0051
Q2030
R2095
47K
47K
47K
47K
SCART_MUTE
R2033
22K
VMUTE2
VMUTE
UNLOAD_SW
TRAY_CCW_L
K2351
0
K2451
4
5
1
3
2
7
6
CN2010
0
R2034
IPOD_VIDEOSEL
ACS_IN
ACS_MUTE
TUN_DI
TRAY_CW_H
DVD_MUTE
R2057
1K
0.1
C2000
3
4
2
5
98
94
95
92
91
93
97
96
1
100
99
80
78
76
77
79
87
86
88
89
82
84
83
81
85
90
16
14 15
17
11
13
12
69
67
65 64
66
68
70
51
49
45
47
46
41
44
42
43
48
50
30
39
37
35
32
31
34
33
36
38
40
22 23
20 21
26
28
27
24 25
18 19
53
55
57
62
60 59
61
63
58
56
54
29
52
75
73
71
72
74
9
7
6
8
10
IC2001
RFKWMPT470EB
R6606
B1ABGC000005
Q2925
R6605
47K
18K
560
INVERTER
INVERTER
INVERTER
AGND
RF+5V
ECO_CTL
2
3
1
5
4
CN2014
TUN_DI
MA2J1110GL
D2966
TUN_CLK
IPHONE_RST
MA2J1110GL
D2964
C2925
10
ECO_DAMP
R6603
Q2926
B1GDCFJJ0047
B1GDCFJJ0047
Q2927
C2013
0.022
C2008
6.3V100
R2085
6
7
5
2
4
3
8
1
RFKWEPT470EB
IC2003
EDA
R2087
C2011
C2012
330P
330P
330P
R2086
22K
22K
47K
4.7K
820
6.8K
4.7K
4.7K
4.7K
C2010
VREF1
R6614
Q2929
B1ADCE000012
R2082
R2089
R2008
47K
VREF2
Q2930
B1GBCFJJ0051
MA2J1110GL
D2008
C2006
50V2.2
POWER SUPPLY
POWER CONTROL
RESET
Q2003
B1GBCFLL0037
C2007
0.1
B0EAKM000117
D2971
PCONT
R2864
R2865
4.7K
B0ACCK000005
D2972
FLD_CLK
FLD_STB
FLD_OUT
R6613
D2969
B0ACCK000005
B0ACCK000005
D2970
R2014
47K
10K
10K
10K
10K
47K
R2030
C2021
0.1
R2075
220
R2056
220
R2041
47K
R2007
47K
R2093
10K
10K
R2022
47K
R2039
47K
R2077
IPOD_DET
RESET
C2026
1800P
0.1
R2863
C2027
KEY2
KEY1
BATTPCONT
IPOD_ACC
ACS_IN
SENSE1
R2862
C2001
0.1
R2080
R2081
ACS_MUTE
VREF
SYS5V
+7V
-7V
ECO_SW
FLD_OUT
FLD_CLK
KEY2
AVSS
SENSE1
DES2
ACS
DES1
[99]AVCC
[98]VREF
KEY1
FLD_STB
[100]ECHO_LVL1
NC
ASP_DAT
ASP_CLK
MD3
RDS_CLK
MIC_SW
[81]IPOD DET
[82]BATT_PCONT
[83]IPOD_ACC
MIC_LVL2
MIC_LVL1
MD2
CEC_IN
ECK
NC
ECS
EDA
RDS_DAT
IPOD_OC
NC
CEC_OUT
UD_CR
VSS
EPM
TUN_SD
FX_DI
FX_DET
FX_SCS
[48]FX_CLK
[49]IPOD_VIDEOSEL
YC_H
NC
VCC
VMUTE
TRAY_CW_H
DVD_MUTE
ANS_FX_CS
TRAY_CCW_L
RGB_H
NC
[47]FX_DO
UNLOAD_SW
[50]AV_MUTE
VMUTE2
INNER_SW
SCART_MUTE
VSS
AUX_MUTE
HP_MUTE
AGND
-7V
DGND
+7V
ACS_MUTE
ACS
MPORT_SW
XIN
FL_IC_STB
KEY2
JOG_B
FL_IC_DAT
RMT
VREF
FL_IC_CLK
HOP_DA
TUN_DO
DC_DET2
AMBP
PCONT
DC_DET1
(CLK)
[32]UART_RX
[33]MUTE_C_S
MICRO PROCESSOR
MUTE_F_SW
MOD_DA
[31]UART_TX
(RxD)
(TxD)
(BUSY)
KEY1
MPORT_SW
JOG_A
IPHONE_RST
HOME_CR/WIDE1
VCOMP_MUTE
BYTE
XCIN
CNVSS
[1]ECHO_LVL2
[2]ECHO_MUTE
ACS_MUTE
ECO-PT170
RMT
VCC
SYNC
VCC
GND
EEPROM
NC
TEST
SK
CS
DO
DI
NMI
+3.3V
+3.3V
DGND
IPHONE_I2C_SCL
IPHONE_I2C_SDA
IPHONE_RST
SW+5V
F+
HP_RCH
AGND
AGND
HP_LCH
DGND
DGND
AGND
F-
-VP
F+
F-
-VP
DGND
XOUT
DVD_CMD
DVD_CLK
ECO_DAMP
JOG_B
JOG_A
DVD_STAT
RESET
XCOUT
FX INT
NSW+6V
1
TP
5
TP
2
TP
6
TP
3
TP
7
TP
8
TP
4
TP
ECHO_LVL1
MIC_IN
MIC_LVL1
MIC_SW
MIC_LVL2
ECHO_MUTE
ECHO_LVL2
AGND
L7100
J0JBC0000015
MIC_SW
MIC_LVL1
MIC_LVL2
ECHO_LVL1
ECHO_LVL2
ECHO_MUTE
R2055
47K
C7101
C7102
0.1
0.1
C7103
100P
100P
C7104
I2CLK(TUN/IPOD)
I2CDAT(TUN/IPOD)
6
8
9
7
2
1
4
5
3
10
CN2005
+7V
MIC_IN
AGND
ECHO_MUTE
-7V
ECHO_LVL1
ECHO_LVL2
MIC LVL 1
MIC_SW
MIC LVL 2
C2915
1000P
C2916
1000P
CORRECTION POINT
               (Delete K7116)
16
3.6.
SMPS Circuit (SA-PT475EE)
With reference to original service manual (section 11.6) on page 86-87 for model no. SA-PT475EE-K
4
5
2
1
P1
B
TO
MAIN CIRCUIT 
(H2901*)
IN SCHEMATIC
DIAGRAM - 9
B
TO
MAIN CIRCUIT 
(H2900*)
IN SCHEMATIC
DIAGRAM - 9
TO SMPS
SECTION (2/2)
SA-PT475EE
SMPS
 CIRCUIT
2/2
1/2
: +B SIGNAL LINE
: -B SIGNAL LINE
A
B
C
D
E
F
G
H
1
2
3
4
5
6
7
8
9
10
11
12
13
14
1
2
3
4
5
6
7
8
9
10
11
12
13
14
G
 SMPS CIRCUIT
SCHEMATIC DIAGRAM - 14
R5864
15K
K2
0
50V22
C5798
SWITCHING REGULATOR
C5897
INVERTER
ECO CONTROL
0.1
B0EAMM000057
D5896
22
R5798
R5893
39K
R5895
15K
4
3
1
2
PC5702
B3PBA0000402
SYNC SWITCH
MA2YF8000L
D5730
820K
R5708
330
R5894
SHUNT REGULATOR
4
3
1
2
B3PBA0000402
FEED BACK
PC5799
2.2K
R5890
C5898
0.1
F1BAF1020020
1000P
C5705
0
R5896
R5786
200K
R5891
33K
R5892
4.7K
C5899
10V1000
9
10
7
8
1
2
3
4
5
6
ETS19AB2A6AG
BACKUP TRANSFORMER
T5751
Q5898
B1ABCF000176
SYNC
100K
R5887
100
R5886
B0BC035A0007
D2901
B0EAMM000057
D2903
Q2900
B1BABK000001
D2906
B0JAME000029
J0JBC0000041
L2916
L2915
J0JBC0000041
C2912
16V100
R2902
SWITCHING TRANSFORMER 
PSAVE CONTROL 
47
C2902
5600P
L2914
J0JBC0000041
8
9
11
12
10
2
5
6
3
4
1
7
14
13
CN2016
4.7K
R2900
16V33
C2900
47K
R2914
35V33
C2903
D2908
B0EAMM000057
G0C390JA0055
L2910
D2909
MAZ8240GHL
1
2
FP2901
1A
5
3
4
8
7
6
2
1
9
T2900
G4D1A0000117
SYS5V
A
R
3
2
C
1
IC5899
C0DAEMZ00001
D5793
B0HAMP000094
C5790
2200P
D5798
B0EAMM000057
R2910
-7V REGULATOR
POWER CONTROL
1.5
L2902
G0A101ZA0028
R2908
560
R2907
2.7K
16V10
C2909
R2913
0
L2901
G0A220GA0026
E2900
C2908
16V47
Q2903
2SC3940ARA
R2905
39
G0A200D00002
L2911
0.01
C2939
C2955
25V220
C2922
6.3V820
D2952
1
2
3
B0BC010A0007
R2912
2.7K
R2920
3.9K
R2921
390
C2907
1000P
2SB0621AHA
Q2901
B1ADCF000001
Q2902
R2911
1K
1000P
C2924
R2919
1K
D2904
B0JCPD000025
4
2
1
3
5
C0DAAYH00001
IC2903
7
8
5
1
2
4
3
IC5799
MIP2F20MSSCF
SWITCHING REGULATOR
D5797
0
470K
R5795
C5795
1000P
0.1
C5796
R5797
15K
DCDET
-13V
C5896
0.1
SYS5V
SYNC
VSS
DC_18V
DC_18V
PCONT
R5866
100K
R5818
100
C5820
6.3V2200
ECO_CTL
R2010
1K
ECO_CTL
6.8K
R5805
B1ABCF000176
Q5863
C5863
4.7
4.7K
R5865
C5870
0.01
22
R5829
R5817
2.2K
0.1
C5818
15K
R5806
0.1
C5810
L2903
G0A101ZA0028
560
R2953
C2905
1000P
C2906
10V100
3.9K
R2952
MOT_+9V
4.7K
R5802
100V0.1
C5817
VDD
4
2
1
3
5
C0DAAYG00001
IC2900
R5814
8.2K
C2930
10V680
B0BC010A0007
D2951
1.2K
R2923
6.8K
R2906
0.01
C2929
C2923
25V220
C2927
0.01
5
6
1
3
4
2
8
7
CN2017
B0JCPD000025
D2913
1K
R2922
150K
R5804
R5803
0
D5725
MAZ8062GML
R5807
330
330
R5809
R5730
1K
A
R
3
2
C
1
C0DABFC00002
IC5801
2.2K
R5808
4
3
1
2
B3PBA0000402
FEED BACK
PC5720
+7V
+7V REGULATOR
+9V
+9V
+9V
AGND
GND
OUT
INV
STBY
VCC
NC
ECO_CTL
-7V
DC_DET2
PCONT
+18V.-12V_GND
+18V.-12V_GND
SYS_GND
SYS_GND
SHUNT REGULATOR
AGND
OUT
VCC
GND
INV
STBY
+5.3V
+5.3V
+5.3V
F-
F+
F+
F+
GND
GND
-VP
F-
-VP
F-
-VP
SYNC
5.3V
MOTOR_+9V
+18V
SYS5VGND
SYS5V
MGND
MGND
MGND
TUNER_+9V
5.3V
FAN GND
AGND
+18V
FB
VCC
S
D
S
FB
VDD
VCC
TR
SWITCHING REGULATOR
C2921
1
C2931
0.47
ADD
0.1   0.47
CHANGE
C2932
R2930
4.7K
1M
CHANGE
R2935
4.7K
1M
CHANGE
Page of 21
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