Philips LC4.31E Service Manual page 87

Circuit Diagrams and PWB Layouts
SSB .3: DC-DC Converter
1 2
B06 DC-DC CONVERTER
+5V
A
+12VSW F701
+12VSW
2704
10u 16V
+12VSW
B
3718
2719
100n
10R
3719
680R
I714
7710
L6910
C
I711
2717 100n
1 VREF
Monitor
I712
2718
100n
4 SS
Protection & Ref
2 OSC
OSC
SIG_GND2
8
EAREF
2702
D
100n
SIG_GND2
FOR 37"-50" LARGE SCREEN I722
SUPPLY TO TUNER & HERCULES
+12VSW 5730
E
I731
10u
7730
8
2766 L5973D
2730
10u
22u 16V VCC
3
INH
2
SYNC
SUP_GND1 SUP_GND1
SUP_GND1
GND GND_HS
F
SUP_GND1
7738
5738
+12VSW I702 L78M08CDT
1
IN OUT
3
120R
2738 COM 2739 +3V3STBY
47u 16V
47u 16V
G
2
+12VSW 6740 3740
I740 I741
7741
BC847BW
PDZ8.2-B 1K5
3741 2741
1K5 220n
FOR 37"-50" LARGE SCREEN
3139 123 6117.3
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 2764 2711 2765
22u 16V 10u 10u
22u 16V
SUP_GND2 SUP_GND2 5717
SUP_GND2 SUP_GND2
10u
2720
1n0
2724
1n0
I715
I724
7711-1 2725
2 SI4922DY 1n0
I717
BOOT 12 2721 100n
I716
3701
HGATE 11 3720 2R2
I719 10K 3723
I718
PHASE 10 10R
7711-2
SI4922DY
LGATE 14 3721 2R2 4
I720
I721 SUP_GND2
3702
PGND 13
10K
F717
GND 7
SIG_GND2
I723
VFB 6
2722 3722
1n0 2K7
2723 47n
I762 3734
100R
6
6734
F VREF
1
OUT 6735
BAV99
I733
5
FB
7735
I705
4 2N7002 I735
COMP
2734 2733
22n
9 220p
I734 2735
7
680p
I701
6733
5733 3735
SS14
3736 33u 1K0
4K7 SUP_GND1 SUP_GND1
5735
SUP_GND1
SUP_GND1
100u
SUP_GND1
SUP_GND1
5737
3732
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 87
6 7 8
FOR 26"-42" SCREEN
F710 +3V3STBY
2716
16V
470u
5713
I725
FROM SCALER 7755
PDTC114ET
3u3
PANEL-PWR-CTL
(0V)
F755
0V6
SUPPLY TO SCALER
5752
+12VSW
10u
2753
22u 16V
SUP_GND2
GND SUP_GND3
2763
22n
3727
1K0 1%
SIG_GND2
3737
4K7
SUP_GND3
32V9 SUP_GND3
F736 +VTUN
TO TUNER CELL
2736
22u
35V 6736
BZX384-C33
26" & 32" LCD
SUP_GND1
FROM HERCULES
SUP_GND1
TO HERCULES CELL
3759
12K
0V
+5VSW SC_STANDBY
5V2 F737
7756
+8VSW_TV PDTC114ET
F738 3V1
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
RES
1
6V8
I747
3758
3760
15K
100R
I760
2760
1u0
25V
RESERVED
I764
7752
L5970D
I755
8 1
VCC OUT
I758
4 5
COMP FB
5753 6751
2756
3 2 220u SS14
INH SYNC
220p
7
6
GND VREF
SUP_GND3 SUP_GND3
TO SCALER CELL
3754 5754 F754
3753 I753 I754 +5VSWI
10u 5V4
1K0 1% 1V2
3K3 1%
SUP_GND3
2757 2758
470u 16V 470u 16V
+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
5751
10u
9 10
11 2700 B11 6718 C5
2701 B11 6733 F4
2702 D1 6734 E4
2704 A2 6735 E5
B06
2706 A3 6736 F6
2708 B4 6740 G1
2709 A4 6751 D10
2710 B3 7708 A5
2711 B4 7710 C2
2716 A7 7711-1 C4
2717 C1 7711-2 D4
2718 C1 7730 E2
2719 B2 7735 F5
A 2720 B3 7738 G2
2721 C4 7741 G3
2722 D4 7742 G3
2723 E4 7752 D9
2724 C5 7754 B9
TO PACIFIC3
2725 C5 7755 B8
2726 C5 7756 G8
LVDS_VCC
F700
2727 C6 7758 F9
2730 E2 F700 B11
11V5
2731 G5 F701 A2
2701
2733 F4 F710 A6
100p
2734 F3 F717 D3
B
2735 F5 F736 E6
2736 E6 F737 G6
2737 G6 F738 G6
2738 G1 F743 G6
2739 G2 F754 E11
2741 G2 F755 C8
2749 B8 I701 F3
2750 F9 I702 G1
2751 B9 I704 G9
2752 B10 I705 F3
2753 D8 I706 A3
2756 D8 I708 A4
C
2757 F10 I709 A4
2758 F11 I710 B3
2759 G10 I711 C2
2760 B9 I712 C2
2761 G9 I714 C2
2762 F9 I715 C3
2763 D8 I716 C3
2764 B4 I717 C4
2765 B4 I718 C3
2766 E2 I719 C4
3701 C4 I720 D3
D 3702 D4 I721 D4
3709 B4 I722 E2
3718 B2 I723 D4
3719 B3 I724 C5
3720 C3 I725 B6
3721 D3 I726 C6
3722 D4 I731 E2
3723 C5 I732 G4
3724 C6 I733 E4
3725 C6 I734 F4
3726 C6 I735 F5
3727 D6 I736 G5
E
3732 G3 I740 G1
3733 G4 I741 G2
TO LIPSYNC
3734 E4 I742 G3
3735 F5 I747 B9
3736 F3 I748 F8
3737 E8 I753 E9
3740 G1 I754 E10
3741 G2 I755 D10
3742 G3 I756 B9
3743 G3 I757 B9
3750 F8 I758 D8
3753 E9 I760 B8
F
3754 E10 I762 E4
3755 B9 I764 C8
3758 B8
3759 F8
3760 B9
3761 G9
5700 B11
5704 A3
5709 B3
5713 B6
5717 B5
G 5730 E2
5733 F4
5735 F5
5737 G5
5738 G1
5751 G10
5752 C8
5753 D10
5754 E10
5756 A9
I_16213_006.eps 5757 A10
121108 6717 C3
11