Philips 42PF9945 Service Manual page 93

Circuit Diagrams and PWB Layouts
Small Signal Board: Audio Demodulator
1 2 3
AUDIO DEMODULATOR
A
+5DA
+11V_S +11V_AUD
5A00 IA10 2A00
30R
+5V_AUD
1n
IA11
+5DB
B
5A03 IA12
7A02
IA25
MSP4450
3A19
SCL-F
1
100R I2C-CL
SCL-F-AUD
3A17
2
SDA-F
I2C-DA
100R
C SDA-F-AUD
2A29
52 ANA-IN2+
100p
B2 DEMODULATOR
IA23
2A32 2A33
QSS_AM 50 ANA-IN1+
100p 100n
5A19 2A37
51
A20
ANA-IN-
22u
100p
IA24
3A31
2A39
D
1K
1u
MONO
47 MONO-IN
B14d(2X)
3A3A FA26 2A46
45 SC1-IN-R
SNDR-MAIN-IN
2A47
100R 1u
44 SC1-IN-L
SCART 1
FA27 2A49
1n 3A3B
SNDL-MAIN-IN
B14d(2X)
2A51
100R 1u
3A3C IA13 2A53
1n
NC 42 SC2-IN-R
E SNDR-2Fh1-IN
2A55 100R
1u
41 SC2-IN-L
SCART 2
NC 3A3D IA14 2A56
1n
SNDL-2Fh1-IN
2A58 100R
1u
NC
3A37 IA15 2A59
1n 39 SC3-IN-R
SNDR-2Fh2-IN
2A61 100R
1u 38 SC3-IN-L
SCART 3
NC
3A39 IA16 2A62
1n
SNDL-2Fh2-IN
2A63
100R 1u
F
1n
36 SC4-IN-R
B14b
IA17 2A67
3A3E
SND-CENTER-IN
35 SC4-IN-L
2A68 100R
1u
SCART 4
1n
B14b
3A3F 2A71
SND-CENTER-IN
2A73 100R IA18
1u
1n
G
2AB7
1n
B2 B15b,c
5A10
Y50 IN-Y50 DACM-SUB
100MHZ
B2 B15b,c
5A11
U50 IN-U50
100MHZ
B2 B15b,c
5A12
V50 IN-V50
100MHZ
H IA00
2AB3
HPN-L
1u MC33178D
B3a B15b IA02
5A13 REF-AUD 3A45
Y-PIP+MAIN-OUT
Y-PIP+MAIN-IN
100MHZ
39K
B15b
B3a
5A14
U-PIP+MAIN-OUT
U-PIP+MAIN-IN
100MHZ
B15b
B3a 5A15
V-PIP+MAIN-OUT
V-PIP+MAIN-IN
100MHZ
A
I
8204 000 8320.2
1 2 3
FTP1.1E
4 5 6
+8V_AUD
7 9 8 57 60 61 14 15 12 5 6 3 4
31
I2S
ADR interface
interface
FM1 I2SL/R
S1...4 I2SL/R
FM2 LOUDSPEAKER R D/A
NICAM A
LOUDSPEAKER
NICAM B
LOUDSPEAKER L
D/A
IDENT
IDENT
DSP
SCART-L
A/D
D/A
HEADPHONE R
SCART-R
A/D
HEADPHONE
D/A
HEADPHONE L
SCART-R
D/A
SCART-L
D/A
SCART
Switching Facilities
NC
2AB6 2AB2
IA09
1n 1n
2AA8
1n
cA01
A
+5DB
2A79
100n
B6c IA01
2AB4
5
HPN-R 8
MSP-SURR
3 MC33178D
8 B6c
1u
MSP-CENTER
2V9
7A07-A 3A22 5A21
IA03 6
1
7A07-B
2
100K 30R 4
3A47
IA26 REF-AUD
4
3A48
7A08
3A46 39K
BC857B
100K
2AA5
100K
33p
IA20
3A51
IA19
3A49
A 47K
IA27 B14b
47K 3A56
2A99
HEADPHONE-L
4K7
3A55
33p
4K7
A
4 5 6
7. 53
7 8 9
+5DB
+11V_AUD
3A50
100R
+8VC
FA13
7A01
FA14
IA22 BC847BW
2A22
100n
2A23 7A03-A
3
8
LM833D
100n
16
IA06
RESETQ
2
IA07
4
2A27
3A66
6V5
1n 100K
DACM-R 20
3A26
IA08
2A35
DACM-L 21
3A28 2A36 33K
1n
A22
15K FA23
A 33p
2V7
FA24
46
3V9
VREFTOP
34
2A42
AGNDC
IA34
32
CAPL-M
10u
IA35
30
2AB5
CAPL-A
A25
10u
2A50
A26
DACA-R 17
1n
2A54
A27
18
DACA-L
1n
A28
SC1-OUT-R 28
SC1-OUT-L 29
SCART 1
A29
SCART 2
A30
SC2-OUT-R 25
SC2-OUT-L 26
2A66
2A70 1u
1u
2A69
17
SNDL-SEC-IN-F
1u 18
1A00
2A72
20
3 4 PIP-AUD
18M432 1u
2 1
CX-5F
2A74
14
SNDR-SEC-IN-F
1u
13
+5DA
2A75
11
B14b PIP-AUD
2000
HEADPHONE-R
1u
16V 100u
+5V
2V9
3A40 5A20
7
+8VC
30R
100K
IA28
7A09
IA33
BC857B
3A25
3
IA29
330R IA32
3A30
5
7A10-2
BC847BS
IA30 47K
4
3A29
6
IA31
330R
7A10-1
BC847BS 2
1
7 8 9
10 11 12 13
+11V_AUD
2A10
100n
FA12
5
8
7A00-B
6
2A20 4
3 8
A
3A16
1u
1
IA04
7A03-B 100R
5 2
8
LM833D 7A00-A
4
7
LM833D
3A18
6V5
IA05
6
47K
4
1
3A20
6V5
2A25
100K 5A16
100MHZ 2A28
3A23 A23 33p
2A30
33K 100p
33p
3A27
5A17
15K
A
100MHZ
2A34
100p
A24
5A18
100MHZ
2A38
100p
9A00
9A01
3A32
100R 2A48
1n
3A33
100R 2A52
1n
3A34
2A57
100R
1n
3A36
2A64 100R 2A60
A
7A06 100n
TDA7309 1 19
RECL LOUDL
IN1L
IN2L OUTL 2 3V6
VOLUME+
IN3L
LOUDNESS MUTE
DGND 6
SERIAL BUS DECODER SDA 4
IN1R
+ LATCHES
SCL 5
IN2R
ADDR 8
2A78
IN3R
SOFT
2A76
CSM 3
MUTE
3A43
INPUT
100n
SELECTOR
100R
VOLUME+
A
OUTR 9
LOUDNESS 3V6
3A44
SUPPLY
MUTE
100R 2A87
VS AGND CREF RECR LOUDR
16 7 15 10 12
2A83 IA21
4V2
5A04
100n
100MHZ
5A05
100MHZ
A
3A42
+5V 100R 2A77
5A06
+5VF
2A95
220p
10 11 12 13
1A00 G7 2A92 I6 5A13 H1
2A00 A3 2A93 I12 5A14 I1
2A01 B2 2A94 I12 5A15 I1
2A02 B1 2A95 I11 5A16 C13
2A03 B2 2A96 I2 5A17 D13
2A04 B3 2A97 I2 5A18 D13
2A05 B1 2A98 I2 5A19 D2
2A06 B1 2A99 I4 5A20 H7
2A07 B2 2AA0 I5 5A21 H4
A
2A08 B2 2AA1 H7 6A00 B7
2A09 B3 2AA5 I6 6A01 H8
2A10 B13 2AA6 G6 6A02 I8
2A11 B10 2AA7 G6 7A00-A C12
2A12 B4 2AA8 G6 7A00-B B13
2A13 B4 2AA9 G7 7A01 B8
2A14 B13 2AB0 G7 7A02 B3
2A15 B12 2AB2 G4 7A03-A C10
2A16 B12 2AB3 H3 7A03-B B11
LM833D
B6a(3X)
REF-AUD
2A17 B7 2AB4 H5 7A06 G10
B
B6c(4X)
7 2A18 B6 2AB5 D8 7A07-A H3
FA17 2A19 I8 2AB6 G4 7A07-B H6
2A20 B11 2AB7 G3 7A08 I4
6V3
2A21 B7 2AB8 B12 7A09 H7
2A22 B10 3A00 B8 7A10-1 I7
2A23 C9 3A01 B8 7A10-2 I7
2A25 C11 3A02 B5 9A00 E11
2A26 C10 3A03 B6 9A01 E11
B6c
AUDIO-SW-NF
2A27 C7 3A05 B4 9A02 G12
C
2A28 C13 3A06 B4 9A03 G12
NC
AUDIO-SW
2A29 C2 3A08 B5 9A04 H1
2A30 C10 3A09 B8 9A05 H1
2A31 C9 3A11 B12 9A06 H1
2A32 D1 3A12 B11 9A08 H5
2A33 D2 3A13 B9 9A09 H5
B14e
2A34 D13 3A14 B10 FA12 B12
AUDIO-R
2A35 D7 3A15 B12 FA13 B7
2A36 D9 3A16 B13 FA14 B8
D
2A37 D2 3A17 C2 FA17 B13
2A38 D13 3A18 C11 FA23 D9
B14e
AUDIO-L
2A39 D2 3A19 C2 FA24 D8
2A40 D9 3A20 C10 FA26 D2
2A41 D9 3A21 B11 FA27 E2
2A42 D8 3A22 H4 IA00 H3
HPN-R
2A43 D8 3A23 C11 IA01 H6
2A44 D8 3A25 I7 IA02 H3
2A45 D2 3A26 D9 IA03 H6
HPN-L
2A46 D2 3A27 D10 IA04 B11
E
2A47 E1 3A28 D9 IA05 C10
B14d
2A48 E13 3A29 I7 IA06 C9
SNDR-SC1-OUT-DC
2A49 E2 3A30 I8 IA07 C7
2A50 E8 3A31 D1 IA08 D7
B14d
2A51 E1 3A32 E13 IA09 G6
SNDL-SC1-OUT-DC
2A52 F13 3A33 F13 IA10 A2
2A53 E2 3A34 F13 IA11 B3
2A54 E8 3A35 I8 IA12 B2
B14b,d
2A55 E1 3A36 F13 IA13 E2
SNDR-MON-OUT F
2A56 E2 3A37 F2 IA14 E2
2A57 F13 3A38 I8 IA15 F2
B14b,d 2A58 E1 3A39 F2 IA16 F2
SNDL-MON-OUT
2A59 F2 3A3A D2 IA17 F2
2A60 F13 3A3B E2 IA18 G2
2A61 F1 3A3C E2 IA19 I4
1n
2A62 F2 3A3D E2 IA20 I6
2A63 F1 3A3E F2 IA21 H10
2A64 F11 3A3F G2 IA22 B8
G
2A65 B7 3A40 H7 IA23 D2
2A66 F9 3A41 I4 IA24 D2
2A67 F2 3A42 I13 IA25 B2
B6a,c
2A68 F1 3A43 H13 IA26 H4
SDA-F-AUD
B6a,c 2A69 G9 3A44 H13 IA27 I4
SCL-F-AUD
2A70 G9 3A45 H3 IA28 H7
2A71 G2 3A46 I4 IA29 I7
2A72 G9 3A47 H5 IA30 I7
B14d(2X)
1n
SNDL-SEC-IN
2A73 G1 3A48 H6 IA31 I7
SNDL-SEC-IN-F 2A74 G9 3A49 I3 IA32 I8
H
2A75 H9 3A50 A7 IA33 H8
SNDR-SEC-IN
B14d(2X)
2A76 H12 3A51 I6 cA01 H6
2A77 I13 3A52 I3
1n
2A78 H13 3A53 I5
SNDR-SEC-IN-F
2A79 H3 3A54 I7
B2 , B3a
HA50 2A80 I9 3A55 I3
2A81 I10 3A56 I6
B2 , B3a
2A82 I12 3A66 C9
VA50
2A83 H10 5A00 A1
I
B15b
2A84 H2 5A01 B2
MONO-PIP
2A85 H2 5A03 B1
2A86 H2 5A04 I13
B6a(2x)
1n
PIP-AUD
2A87 H13 5A05 I13
2A88 I11 5A06 I11
2A89 I10 5A10 G1
2A90 I10 5A11 H1
2A91 I3 5A12 H1
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