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Philips LC4.31E Service Manual Page 54

Chassis lc4.31e aa.
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Circuit Diagrams and PWB Layouts
SSB .2: DC-DC Converter
1
2
DC-DC CONVERTER
B6
A
+5V
F701
+12VSW
+12VSW
2704
10u
16V
B
+12VSW
3718
2719
100n
10R
C
I714
7710
L6910
I711
2717
100n
1
VREF
Monitor
I712
2718
100n
4
SS
Protection & Ref
2
OSC
OSC
D
SIG_GND2
8
EAREF
2702
100n
SIG_GND2
E
FOR 37"-50" LARGE SCREEN
I722
SUPPLY TO TUNER & HERCULES
+12VSW
5730
I731
10u
7730
L5973D
2730
22u
16V
VCC
3
F
INH
SUP_GND1
2
SYNC
SUP_GND1
GND GND_HS
G
7738
5738
+12VSW
I702
L78M08CDT
1
IN
OUT
3
120R
2738
COM
2739
+3V3STBY
47u
16V
47u
16V
2
+12VSW 6740
I740
3740
I741
7741
BC847BW
PDZ8.2-B
1K5
3741
2741
H
1K5
220n
FOR 37"-50" LARGE SCREEN
3139 123 6117.2
1
2
LC4.31E AA
3
4
5
I706
5704
7708
2706
LF33CPT
10u 16V
I709
1
5
IN
OUT
I708
2
4
CTRL NC
NC
COM
2709
3709
2708
47u
16V
6K8
RES
5709
I710
10u
2710
2711
22u 16V
22u
16V
SUP_GND2
SUP_GND2
2720
3719
680R
1n0
2724
1n0
I715
I724
7711-1
2725
2
SI4922DY
1n0
I717
BOOT
12
2721
100n
I716
3701
HGATE
11
3720
2R2
3723
I719
10K
I718
PHASE
10
10R
7711-2
SI4922DY
LGATE
14
3721
2R2
4
I720
I721
3702
SUP_GND2
PGND
13
10K
F717
GND
7
SIG_GND2
I723
VFB
6
2722
3722
1n0
2K7
2723
47n
I762
3734
100R
6
8
6734
Φ
VREF
1
6735
OUT
BAV99
I733
5
FB
7735
I705
I735
4
2N7002
COMP
2734
2733
22n
9
220p
I734
7
2735
680p
I701
6733
SUP_GND1
5733
3735
SS14
3736
33u
1K0
4K7
SUP_GND1
SUP_GND1
5735
SUP_GND1
SUP_GND1
100u
SUP_GND1
SUP_GND1
3732
5737
3K3
I736
3733
SUP_GND1
1%
10u
I732
1K0
1%
3743
22K
3742
15K
2731
I742
470u
16V
7742
BC847BW
SUP_GND1
3
4
5
7.
EN 54
6
7
8
FOR 26"-42" SCREEN
F710
+3V3STBY
2716
16V
470u
5717
I725
5713
FROM SCALER
7755
PDTC114ET
10u
3u3
PANEL-PWR-CTL
F755
SUPPLY TO SCALER
5752
+12VSW
10u
2753
22u 16V
SUP_GND2
GND
2763
22n
3727
1%
1K0
SIG_GND2
3737
4K7
SUP_GND3
32V9
F736
+VTUN
TO TUNER CELL
2736
22u
35V
6736
BZX384-C33
SUP_GND1
FROM HERCULES
SUP_GND1
TO HERCULES CELL
3759
12K
0V
+5VSW
SC_STANDBY
5V2
F737
7756
3V1
PDTC114ET
+8VSW_TV
F738
8V
F743
POWER_DOWN
B5
2737
470u
16V
B7
B16
6
7
8
9
10
+12VSW
5756
SS = 4V9
7754
5757
PAN_VCC
5700
I757
I756
SI2301BDS-T1-E3
2
3
11V5
120R
120R
RES
2749
3755
2751
2752
2700
10K
4u7
47u 16V
1
RES
6V8
I747
3758
15K
3760
100R
I760
2760
1u0
(0V)
25V
0V6
RES
I764
RES
7752
L5970D
8
1
I755
VCC
OUT
SUP_GND3
I758
4
5
COMP
FB
6751
5753
2756
3
2
220u
SS14
INH
SYNC
220p
7
6
GND
VREF
SUP_GND3
SUP_GND3
SUP_GND3
TO SCALER CELL
3753
3754
I754
5754
F754
+5VSWI
I753
10u
5V4
1K0
1%
1V2
3K3
1%
SUP_GND3
2757
2758
470u 16V
470u
+3V3STBY
3V2
RES
SUP_GND3
2750
3750
2762
22K
22u
16V
7758
4
SI4423DY
I748
+3V3SW
3V2
3761
100R
2759
I704
100u 16V
2761
1u0
25V
RES
5751
10u
9
10
11
2700 B11
6736 F6
2701 B11
6740 H1
2702 D1
6751 E10
B6
2704 B2
7708 A5
2706 A3
7710 C2
2708 B4
7711-1 C4
2709 B4
7711-2 D4
A
2710 B4
7730 F2
2711 B4
7735 F5
2716 B7
7738 G2
2717 D1
7741 H3
2718 D1
7742 H3
2719 C2
7752 D9
2720 C3
7754 B9
2721 D4
7755 C8
2722 E4
7756 G8
2723 E4
7758 G9
2724 C5
F700 B11
TO PACIFIC3
2725 C5
F701 B2
B
LVDS_VCC
2726 C5
F710 B6
F700
2727 D6
F717 D3
11V5
2730 F2
F736 F6
2731 H5
F737 G6
2701
100p
2733 F4
F738 G6
2734 F3
F743 G6
2735 F5
F754 F11
2736 F6
F755 C8
2737 H6
I701 F3
2738 G1
I702 G1
2739 G2
I704 G8
C
2741 H2
I705 F3
2749 B8
I706 A3
2750 F9
I708 B4
2751 B9
I709 B4
2752 B10
I710 B3
2753 D8
I711 D2
2756 E8
I712 D2
2757 F10
I714 C2
2758 F11
I715 C3
2759 G10
I716 D3
2760 C9
I717 D4
2761 G9
I718 D3
D
2762 G9
I719 D4
2763 E8
I720 D3
3701 D4
I721 D4
3702 D4
I722 E2
3709 B4
I723 E4
3718 C2
I724 C5
3719 C3
I725 C6
3720 D4
I726 C6
3721 D3
I731 E2
3722 E4
I732 G4
3723 D5
I733 F4
3724 C6
I734 F4
E
3725 C6
I735 F5
3726 C6
I736 G5
3727 E6
I740 H1
3732 G3
I741 H2
3733 G4
I742 H3
3734 E4
I747 B9
3735 G5
I748 G8
3736 G3
I753 F9
TO LIPSYNC
3737 E8
I754 F10
3740 H2
I755 D10
3741 H2
I756 B9
F
3742 H3
I757 B9
3743 G3
I758 E8
16V
3750 G8
I760 C8
3753 F9
I762 E4
3754 F10
I764 D8
3755 B9
3758 C8
3759 G8
3760 C9
3761 G9
5700 B11
5704 A3
G
5709 B3
5713 C6
5717 C5
5730 E2
5733 G4
5735 G5
5737 G5
5738 G1
5751 H10
5752 D8
5753 E10
5754 F10
H
5756 B9
5757 B10
6717 C3
6718 C5
6733 G4
G_16210_006.eps
6734 F4
160106
6735 F5
11

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