Small Signal Board: Backlight Control - Philips 50pf9966 Service Manual

Circuit Diagrams and PWB Layouts

Small Signal Board: Backlight Control

2063 C3 3023 C1 3030 B2 3036 B4
3022 B1 3028 B2 3032 B2 3037 C4
1 2
BACKLIGHT CONTROL
A
+5V_CON
*
B
*
B5a
IC52
3028
PWM_BACKLIGHT
4K7
*
C
D
8204 000 8344.3
1 2
FTP2.2U AA
3070 C3 7021-1 B4 9019 C4 IC50 B4 IC52 B2
7020 B2 7021-2 B4 FC72 B4 IC51 B3
3 4
+5V_CON +8V_CON
*
*
RES
IC50
7021-1
BC847BPN
*
IC51
10K
FC72
BC847BPN
7021-2
*
(
3032
7020
BC847BW
*
*
9019
* *
*
3 4
7. 51
Small Signal Board: OTC-Flash
1402 C1 2C01 B3
1404 B1 2C02 D3
2C00 A2 3C00 A2
A
A
B
B4
ANTI-MOIRE
)
BACKLIGHT
CONTROL
B
SSSS8
1404
C
1402
SSSS8
C
D
SWITCH
FOR SOFTWARE
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D
E_14620_093.eps
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E
F
8204 000 8344.3
3C01 A2 3C05 D2 3C06-3 C4 3C07-2 C4
3C03 B2 3C06-1 C4 3C06-4 C4 3C07-3 D4
3C04 D2 3C06-2 C4 3C07-1 C4 3C07-4 D4
1 2 3
OTC-FLASH
+3V3_INTOTC
3C01 EAn
3V3
10R
+3V3_INTOTC
7018
74LVC245APW
3C08 FC71
19
0V1
G3 VCC
10K
1
7017
3EN1
GND
PDTC144EU
3EN2
SWITCH
b5a,c(2x)
2 18
ROM_OE
1
2
b5a,c(2x)
3 17
ROM_CS
b5a(3x),c(2x)
4 16
RAM_OE
FC65
b5a,c(2x)
5 15
RAM_CS
b5a(3x),c(2x)
6 14
WE
b5c(2x)
7 13
WP
8 12
b5c(2x)
9 11
VCCW
10K
3C04
3C05
470R
7019
74LVC245APW
19
3V3
G3
VCC
1
3EN1
GND
3EN2
SWITCH
b5c(2x)
2
VCCW
1
2
3
b5c(2x)
4
WP
b5a(3x),c(2x)
5
WE
b5a,c(2x)
6
RAM_CS
b5a(3x),c(2x)
7
RAM_OE
b5a,c(2x)
8
ROM_CS
b5a,c(2x)
9
ROM_OE
1 2 3
3C08 B2 7019 D3 9C02 D1 FC64 E3
7017 B2 9C00 A2 FC62 F3 FC65 C1
7018 B3 9C01 C1 FC63 F3 FC71 B2
4
A
20
B
10
B5a,c
b5a,c(2x)
b5a,c(2x)
3C06-1
8 1
SW_OE SW_OE ROM_OE
10R
b5a,c(2x)
b5a,c(2x)
3C06-2
7 2
SW_CS SW_CS ROM_CS
b5a,c(2x) b5a(3x),c(2x)
10R 3C06-3
6 3
EP_OE EP_OE RAM_OE
C
b5a,c(2x) b5a,c(2x)
3C06-4 10R
5 4
EP_CS EP_CS RAM_CS
b5a,c(2x) b5a(3x),c(2x)
10R 3C07-1
1 8
EP_WE EP_WE WE
b5a,c(2x)
b5c(2x)
3C07-2 10R
2 7
SW_WE SW_WE WP
b5a,c(2x)
b5c(2x)
10R 3C07-3
VPP-EPG VPP-EPG 3 6 WP
b5c(2x)
b5a,c(2x)
3C07-4 10R
4 5
VPP-SW VPP-SW VCCW
10R
+3V3_INTOTC D
20
10
E
b5a,c(2x)
18
VPP-EPG
b5a,c(2x)
17
VPP-SW
b5a,c(2x)
FC64
16
EP_WE
b5a,c(2x)
15
SW_WE
b5a,c(2x)
14
SW_CS
b5a,c(2x)
13
SW_OE
F
b5a,c(2x)
FC63
12
EP_CS
b5a,c(2x)
FC62
11
EP_OE
E_14620_094.eps
070704
4