Tv-Supply - Philips LC4.2E Service Manual

Circuit Diagrams and PWB Layouts
TV & Scaler Board: TV-Supply
1 2

TV-SUPPLY

11V9
F903
2936
1n0
1910
F904
3V3
1
P-GND
5909
2 F905
A
3
4
5 F914
6
11V6
7
F906
8
F907
9
F908
10
F909
11
F910
12
2937 2938 2939 2940 2941
1n0 1n0 1n0 1n0 1n0
B
+12VSW
C
D
E
+12VSW
(..V) STANDBY
3139 123 5804.2
1 2
LC4.2E AA 7.
3 4
11V2
AUD-SUP
3V3
+3V3STBY
(1V2)
+12VUNREG
14V4
A2, A5, A7
POWER_DOWN
(0V) 3V3
(0V) 3V2
STANDBY A2
(3V3) 3V3
(3V3) 3V3
BU_LIGHT_ADJ1 A14
LAMP_ON-OFF A14
2942 2909
330u
F902 BU_LIGHT_ADJ2
1n0 A14 8
16V
N.C. DCOL
I901
14V2 7 IS
IS
3930 3931
1R0 1R0
I902
5930
6
14V2
10u VCC
2930
I903
3932
1V2 5
470u 16V
1K0 1%
2932 3933
SUP_GND
3K3 1%
RES
SUP_GND 2934
4n7
7920
L78M08CDT
I910
5920
1 3
IN OUT
14V3 7V9
2920 COM
47u 16V
2
3 4
30
5 6
7930
MC34063AD
DCOL SWC 1 14V2
I904
SWC
S Q
R
2V / div DC
5us / div
I904
1V
SWE 2
IPK
SWE
I905
TIMC 3
OSC
0V7
TIMC
5931
2931
REFERENCE
470p 220u
VCC REGULATOR
SUP_GND
4
CIN_NEG GND
SUP_GND
GND
SUP_GND
5V4
2933
470u 16V
SUP_GND
2921
47u 16V
5 6
7 8
3910
2K2
6930
SS14
5V3
F915
5932
10u
2935
470u 16V
I906
33V7
F912
5910
1m0
6910
BAV99
2911
I907
22u 35V
5V3
7910
I908 TUN_GND
0V3 BC817-25
3911
2910
1K0
470p
8V
TUN_GND TUN_GND
F913
7 8
9
1910 A1
2909 B3
2910 E8
2911 D9
2920 E4
2921 E5
2930 C3
2931 C6
2932 C4
2933 D6
2934 D4
2935 C8
A
2936 A2
2937 B1
2938 B2
2939 B2
2940 B2
2941 B2
2942 B3
3910 B7
3911 E7
3930 B3
3931 B4
3932 C4
B
3933 C4
5909 A2
5910 D8
5920 E3
5930 C3
5931 C6
5932 C8
6910 D8
6911 D9
6930 C7
7910 D7
7920 E4
C
7930 B5
+5VSW
F902 B3
F903 A2
F904 A2
F905 A2
F906 A2
F907 A2
F908 A2
F909 A2
F910 B2
F912 D9
+VTUN D F913 E9
33V7
F914 A1
F915 C9
6911
BZX384-C33
I901 B4
I902 C3
I903 C4
I904 B7
I905 C6
I906 C7
I907 D8
I908 D7
I910 E3
E
+8VSW_TV
E_14490_031.eps
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