Block Diagram Audio - Philips LC4.8A Service Manual

Block Diagrams, Testpoint Overviews, and Waveforms

Block Diagram Audio

AUDIO
B1 TUNER & IF
1102
UV1316E/A I H-4
F108
2106
4110 1106
11 IF-TER 2
RF IN
IFOUT
TUNER 6104
3
RF OUT
Only on
7101
DVB Sets
4 5
SEL_IF_SDM
B2
B23 CINCH ANALOGUE
1R06
SC1_COMP_AV1_L_IN
CVI-1
AUDIO
SC1_COMP_AV1_R_IN
IN L/R
1R03
SC2_L_IN
AV
SC2_R_IN
AUDIO
IN L/R
B22 DIGITAL IO B12 HDMI
3Q30
AV3_L AV3_LEFT
PC
3Q31
AUDIO AV3_R AV3_RIGHT
IN L/R
7D03
SII9993CT
1Q03
1 97
RX2+
HDMI
3 RX2- 96
PANELINK
16
4 RX1+
92
RECEIVER
6 RX1- 91
14
7 87
RX0+
9 RX0- 86
10 RXC+ 84
12
RXC- 83
HDMI
D B17 SIDE CONNECTORS
SIDE AV
1302 1M36
1K04
L_FRONT_IN 6 6
AUDIO
L/R IN R_FRONT_IN 8 8
CONTROL
E B17
CONTROL BOARD SIDE CONNECTORS
1703
Channel+
1704
Channel-
1705
Menu
1702
Volume+
1701
Volume-
2 2
1706
Power
J
LED PANEL
+5V2-STBY
1040
3
VS
2
3 3
1
GND OUT
6070
1 1
+5V2-STBY
6050
7052 7062 2 2
Green
6051
3051
7051 Red +5V2-STBY 5 5
4 4
6 6
LC4.8A AA
B2 HERCULES
7217
TDA15021H
7 SIF1 29 AM
QSS Mixer
AM Demod.
QSS/FM
SIF2 30
8
AD Conv.
33
Std Stereo
Decoder
34
SC1_COMP_AV1_L_IN
SC1_COMP_AV1_R_IN 35
I2S
Processor
56
SC2_L_IN
SC2_R_IN 57
7D05
12
15 AudioIN2L 53
13 AUDIO
SELECT
AudioIN2R
2 14 54
ADC/DAC
1
10,11
AV3_HDMI-AUDIO_SEL
B7
FRONT_L_IN
49
FRONT_R_IN
50
B2
HERCULES
HERCULES
B3 SYNC INTERFACE
3431
+3v3STBY
+3V3STBY
7430
6F00
+5VSW
3432
RES
6. 26
B5 AUDIO PROCESSING
4212 4618
61
AUDOUTLSL AUDIO-L
4211 4219
60
AUDOUTLSR AUDIO-R
AUDIO
CONTROL
Vol/Treb/
Bass
SOUND-ENABLE_1
Features
POR_AUDIO
DACs B5
7601
TS482ID
2 1
6 7
OUT_MUTE
7602
74HC08PW
2
3 &
1
6 &
5
9
OUT_MUTE
8
&
10
12
POR_AUDIO
&
B16 13
62 SC2_L_MON_OUT
63 SC2_R_MON_OUT
OUT_MUTE
MUTE
36 SC1_L_RF_OUT
N.C.
SC1_R_RF_OUT
37
B6 DC-DC CONVERTER
B1
4022
+12VSW
3758
7755
B3
B3
B8
B5
B5
B6 B15 B2
B15
10
1202
11
B16 SA3 AUDIO
+16V+19V
7700
TDA7490
1 1 10
AUDIO-L
PWM
stby-mute
6
OSC
3 3
AUDIO-R
PWM
18
2,24
7701:7707 -16V-19V
SOUND-ENABLE
8 8 PROT1
SOUND
9 9 POR-CLASSD ENABLE
7709/7710
6703
AUDIO
PROT_AUDIOSUPPLY
7 7
N.C. SUPPLY
6702
PROT, CIRCUIT
B17 D
SIDE SIDE I/O
CONNECTORS
10 10 SOUND L-HEADPHONE-OUT
HP_LOUT
HP_ROUT 11 11 SOUND R-HEADPHONE-OUT
7 7 DETECT
N.C.
MUTE
SOUND_ENABLE
B2 B23 CINCH ANALOGUE
POWER_DOWN
B16
EXT_MUTE
B2
3628
+5V
SC2_L
SC2_R
5756 5754
7754
LVDS_VCC
PAN_VCC
7758
+3V3SW
+3V3STBY
3759
7756
4,22
1736
5731
5701
1
3
3718
3
Speaker L
1735
5730 15W/8Ω
5702
1
23
3717
3
Speaker R
15W/8Ω
1M02
DCPROT 7
TO 1002
6
SA
+16 V+19V
5
3764
SUPPLY
-16 V-19V 2
3761 -16 V-19V
1
+16 V+19V
2
3
5
1R07
SC2_L_MON_OUT
SC2_R_MON_OUT
F_15420_050.eps
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