Block Diagram Audio - Philips LC4.8E AB Service Manual

Block Diagrams, Test Point Overviews, and Waveforms

Block Diagram Audio

AUDIO
B1 TUNER & IF
1102
UV1318S
F108
2106 1106
4110
11 IF-TER 2
RF IN IFOUT
TUNER
3
7101
4
5
B2 SEL_IF_SDM
B15
SCART ANALOG IO
1G01
6
SC1_COMP_AV1_L_IN
1
SC1_COMP_AV1_R_IN
2
4G11
21
4G12
EXT 1
SCART 1
7G07*
1G02
74HC4053D
1
6 SC2_L_IN
13
2 SC2_R_IN
1
14
21
15
EXT 2
SCART 2
1G03
6 DMMI_L_IN 12
K5
4 DMMI_R_IN 2
10,11
*Only for AV2_DMMI_SW
DMMI
DVB Set
CONNECTOR
D SIDE I/0 B17 SIDE CONNECTORS
1K04
1002 1M36
L 6 6
AUDIO
L/R IN R
8 8
B14 DIGITAL IO
2 2
4
3
7
CONTROL
E CONTROL BOARD B17 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
1 3 3
GND
OUT
6070
1 1
+5V2-STBY
6050
7052 7062 2 2
Green
6051
3051
7051
Red +5V2-STBY 5 5
+3V3STBY
4 4
6 6
LC4.8E AB 6.
B2 HERCULES
7217
TDA15021H
SIF1 29 AM
7
QSS Mixer
AM Demod. QSS/FM
8 SIF2 30
33 AD Conv.
Std Stereo
AUDIO
Decoder
CONTROL
Vol/Treb/
Bass
Features
DACs
34
SC1_COMP_AV1_L_IN
SC1_COMP_AV1_R_IN 35
I2S
Processor
56
SC2_L_IN
SC2_R_IN
57
AUDIO
SELECT
ADC/DAC
B2
FRONT_L_IN 49
FRONT_R_IN 50
53
AudioIN2L
AudioIN2R 54
B2 HERCULES
HERCULES
B3 SYNC INTERFACE
3431
+3v3STBY
7430
6F00
+5VSW
3432
RES
23
B5 AUDIO PROCESSING
4212 4618
60
AUDOUTLSL AUDIO-L
4211 4219
61
AUDOUTLSR AUDIO-R
SOUND-ENABLE_1
POR_AUDIO
B5
7601
TS482ID
2
1
6 7
OUT_MUTE
MUTE
7602
74HC08PW
2
3 &
SOUND_ENABLE
1
6 &
5
9 POWER_DOWN
OUT_MUTE
8 &
EXT_MUTE
10
12
POR_AUDIO
& 3628
B16 13
62 SC2_L_MON_OUT
63
SC2_R_MON_OUT
OUT_MUTE
MUTE
36 SC1_L_RF_OUT
37 SC1_R_RF_OUT
MUTE
B6
DC-DC CONVERTER
B1
4022
5756
+12VSW
3758
7755
B3
B3
B8
+3V3STBY
B5
7756
B5
B6 B15
B2
B15
10
1202
11
B16 SA3 AUDIO
+16V+19V
7700
TDA7490 4,22
1 1 10
AUDIO-L 3
PWM
stby-mute
6
OSC
3 3
AUDIO-R 23
PWM
18
2,24
-16V-19V
7701:7707
8 8 SOUND-ENABLE PROT1
SOUND
9 9 ENABLE
POR-CLASSD
7709/7710
6703
3764
AUDIO
7 7 PROT_AUDIOSUPPLY
N.C. SUPPLY
6702 3761
PROT, CIRCUIT
B17 SIDE D SIDE I/O
CONNECTORS
HP_LOUT 10 10 SOUND L-HEADPHONE-OUT
HP_ROUT 11 11 SOUND R-HEADPHONE-OUT
7 7 DETECT
N.C.
RES
B2 B15
SCART ANALOGUE IO
B16
B2
+5V
SC2_L_MON_OUT
SC2_R_MON_OUT
SC2_L
SC2_R
SC1_L_RF_OUT
SC1_R_RF_OUT
SC1_L
SC1_R
5754
7754
LVDS_VCC
PAN_VCC
7758
+3V3SW
3759
1736
5731
5701
1
3718
3
Speaker L
1735
5730 15W/8Ω
5702
1
3717
3
Speaker R
15W/8Ω
1M02
7
DCPROT
TO 1002
6
SA
+16 V+19V
5
SUPPLY
-16 V-19V 2
-16 V-19V
1
+16 V+19V
2
3
5
1G02-1
1
3
1
21
EXT 2
SCART 2
1G01-1
1
3
1
21
EXT 1
SCART 1
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