Ssb: Dc-Dc Converter (B1) - Philips LC4.3E Service Manual

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Circuit Diagrams and PWB Layouts
SSB: DC-DC Converter
1 2
DC-DC CONVERTER
B6
FROM TOP CONNECTORS
A
+12VUNREG
+5V
B
3708
+12VUNREG
6708
SS24
C
5709
10u
2710
10u
SUP_GND2
SUP_GND2
D
FOR UFD ONLY
SUPPLY TO TUNER & HERCULES
E
+12VSW 5730
10u
SUP_GND1
F
5738
+12VSW
1
IN
2738
47u 16V
G +12VUNREG 6740
I740 3740
BZX384-C8V2 1K5
FOR UFD ONLY
3139 123 6093.1
1 2
LC4.3E AB
3 4
F701
+12VSW
2704
10u 16V
I706
2706 5704
10u 16V
7708
LF33CPT
I709
1 5
IN OUT
10K I708
2 4
CTRL NC NC
COM
6709 2709
3709 2708
SS14 47u 16V
6K8 RES
I710
7710
I711
L5973D
NC
Φ
VCC VREF
5712
I712 I713
2711 1
OUT
10u 3 33u
INH
I714
3712
5
FB 5K6
2
2715 1%
SYNC
I715 I716
NC 4
COMP
22n
SUP_GND2
GND GND_HS
6712 2714 3716 3713
SS36 220p 4K7 3K3
1%
SUP_GND2 SUP_GND2
SUP_GND2 SUP_GND2 SUP_GND2 SUP_GND2
SUP_GND2
7730
L5970D
I731 8 I733
1
VCC OUT
I705
4 5
COMP FB
2730
2734
10u 3 2
22n INH SYNC
25V
2733 7
6
GND VREF
220p
6733
5733
3736
SS14
4K7 220u
SUP_GND1
SUP_GND1
SUP_GND1 SUP_GND1 SUP_GND1
SUP_GND1
3732
3733 3K3
7738
SUP_GND1 1%
L78M08CDT 1K0 1% I732
OUT
3
3743
COM 2739 +3V3STBY
47u 16V
22K
2 3742
15K
I742
7742
BC847BW
I741
7741
BC847BW
3741 2741
1K5 220n
3 4
7. 32
5 6 7
FOR LCD ONLY
FROM SCALER
+3V3STBY
F710
PANEL-PWR-CTL
SUPPLY TO SCALER
5713
10u
2713 2716
16V 470u 16V
470u
+12VSW
5752
10u
32V9
F736 +VTUN
2753
470u 16V
TO TUNER CELL
6735 2736
22u
BAV99
35V 6736
BZX384-C33
GND
SUP_GND3
7735 I735
BC817-25
2735
I734
470p
SUP_GND1
3735
SUP_GND1
1K0
SUP_GND1 SUP_GND1
TO HERCULES CELL
FROM HERCULES
5735
1m0
5737 +5VSW
I736 5V2 F737
10u
+8VSW_TV
F738
8V
SC_STANDBY
F743
POWER_DOWN
3V1
B5
2731 2737
470u 16V 470u 16V
B7
B16
SUP_GND1
5 6 7
8 9 10
I757
+3V3STBY 7 6
+12VSW 5
+5VSWI
4
I749
3
2
1
5758 5755 5756 I750
1751
RES RES
RES
7754 5757
I756 SI2301BDS-T1-E3
2 3
11V5
3755 2751
5759 7753
10K 100n
RES L4940D2T12
1
6V8
I747
PAN_VCC 5700
I759
1 3
IN OUT
3758
15K 3760
COM
100R
2759 RES 2752 2700
47u 16V
7755 RES RES
I760
PDTC114ET
2760
1u0
(0V)
F755
25V
0V6
FOR UFD ONLY
7752
MC34063AD
8 DCOL SWC 1
11V7
S Q
R
I751
7 IS
11V7
I755
SWE 2
IPK
3751 3752
I758
1R0 1R0 OSC TIMC 3
2756
REFERENCE 5753
I752
6 470p 220u
VCC REGULATOR
11V7
3753 I753 SUP_GND3
CIN_NEG GND 4
5
SUP_GND3
1V2
1K0 1%
SUP_GND3
2754 3754 I754 5754
10u
RES 3K3 1%
SUP_GND3
2757
2755
+3V3STBY
470u 16V
4n7
3V2
SUP_GND3
2750
3750 2u2 2762
22K 22u 16V
7758
3759
4
SI9433BDY-T1-E3
I748 SI4433DY
1K0
0V
3V2
3761
7756 100R
PDTC114ET
2761
1u0
25V
FOR UFD ONLY
8 9 10
It`s Free
11
1751 A10 7738 F2
2700 B11 7741 G3
2701 B11 7742 G4
B6
2704 A3 7752 D9
2706 B3 7753 B10
2708 C3 7754 A9
2709 C3 7755 B8
2710 C2 7756 G8
2711 C2 7758 F10
2713 D5 F700 B11
A
2714 D4 F701 A3
2715 D4 F710 B6
2716 D6 F736 E6
2730 E2 F737 F6
2731 G5 F738 F6
2733 F2 F743 G6
2734 E3 F754 E11
2735 F6 F755 C8
2736 E6 I705 E3
TO EPLD
2737 G6 I706 B3
LVDS_VCC 2738 G2 I708 B3
F700
B 2739 G3 I709 B3
2741 G3 I710 C2
11V5
2750 F9 I711 C2
2701
100p 2751 B9 I712 C4
2752 B10 I713 C5
2753 E8 I714 C4
2754 E8 I715 D4
2755 F9 I716 D5
2756 E10 I731 E2
2757 E11 I732 F4
2758 E11 I733 E5
2759 B9 I734 F5
C
2760 B9 I735 E5
2761 G9 I736 F5
2762 F9 I740 G2
3708 B2 I741 G3
3709 C3
I742 G4
3712 D5 I747 B9
3713 D5 I748 F8
3716 D5 I749 A10
3732 F4 I750 A10
3733 F4
I751 D8
3734 D11 I752 E8
3735 F5 I753 E8
D
3736 F3 I754 E9
3740 G2 I755 D10
3734
3741 G2 I756 B9
2K2
3742 G3 I757 A9
3743 G4 I758 D10
3750 F9 I759 B9
3751 D8 I760 B8
3752 D8
6751
3753 E8
SS14
3754 E9
3755 B9
E 3758 B8
3759 F8
TO SCALER CELL TO LIPSYNC
3760 B9
3761 F9
F754 +5VSWI
5700 B11
5V4
5704 B4
5709 C2
2758
5712 C4
470u 16V
5713 C5
5730 E2
5733 F5
5735 F5
F
5737 F5
5738 F1
5752 D8
5753 E11
5754 E11
+3V3SW
5755 A9
5756 A9
5757 A9
5758 A8
5759 B9
6708 C2
6709 C2
G
6712 D4
6733 F5
6735 E6
6736 E6
6740 G2
6751 E11
7708 B4
F_15270_016.eps 7710 C3
7730 E3
250505
7735 E5
11