Philips 24PFS6805/12 Service Manual page 81

9-4-2 System Power 2
P a n e l V C C = 1 2 V o r 5 V
+5V_Normal
P A N E L V C C F B 7 0 9 F B 7 1 0 R 7 3 5
+ 1 2 V N C Y e s 5 . 1 K
+ 5 V Y e s N C 0 R
P A N E L _ O N / O F F : ( S A R 2 )
Normal:High
Stand_By:Low
5.1K OHM 5% 1/10W
PANEL_ON/OFF R739 10K 5%
R741
10K 5%
L N B P O W E R S U P PL Y
+3.3V_EMMC
R742
NC/10K 5%
LNB_EN
R744
100K 5%
C773 R745
L N B _ E N : 3.3NF 50V 60.4K 1%
Low: disable
High: enable
MP8124
Enable
Selection
+3.3V_Normal +3.3V_Normal
R751 R752
10K 5% 10K 5%
LNB_+1V LNB_SEL
R757
R756 NC/100K 5%
NC/100K 5%
1 3 / 1 8 V _ S W :
High: 18V
L N B_ + 1 V :
Low: 13.3/18.3V
Low: 13V
High: 14.3/19.3V
Compensation
Selection
+12V PANEL_VCC
FB709 FB710
Q703
8 1
D D
7 2
D D
6 3
D D
5 4
S G
+ C753
AON4421
R732
100UF 16V
10K 1/10W
C760
1uF
R734
R735 10K 1/10W LED701
GPTS06033GC1-PB
R740
100K OHM 5% 1/8W
Q704
2N7002K
C763
4.7UF 6.3V
+12V
D703
L706 10uH
1
C764 FB340M
C765 C766
NC/10NF 50V
100N 16V 10UF 16V
R743
NC/10R 1/16W 5%
C772 220nF 16V
U707
8 4
C774
AGND PGND
11 3
BY PASS SW
12 5
+12V
VDD BST
10 6
COMP VBOOST
2 7
LNB_EN
0.1uF 25V
EN VOUT
1
LNB_+1V
LINEDROP
9
C775
TCAP
14 13
LNB_SEL
13V/18V EXTM
MP8124GD  Z
R753
33R 5%
R754
100K 1%
U S B P O W E R
+12V
C755 C756
10UF 16V
0.1uF 50V
V o u t = 0 . 7 6 8 x ( 1 + ( 7 3 . 6 K / 1 3 K ) ) = 5 . 1 V
2
C767 C768 C769 C770 C771
E S D & S u r g e
Protect
D704
FB340M
22NF 25V
ZD703 R746 R747 R748
D705
C776
FB340M
0.1uF 25V
3K 3K 3K
DISEQC
C752 22P 50V
R730 R729
3.9K 1% 68K 1%
C754
R718
15R 1%
100N 50V
U706
R737
1 6
GND VBST NC/10K 5%
2 5 STANDBY
SW EN
3 4
VIN VFB
R764
TPS563201DDCR
10K 5%
R736
13K 1% C762
10NF 50V
VCC_LNBA
ZD704
D706
2 1
USB_PORT1_5V
NC/FB340M
+5V_Normal
3 . 3 A
L705
4.7uH
C759
C757 C758
10UF 16V 10UF 16V 0.1uF 25V
Wi-Fi_PWR_EN 11,14
LNB_SEL 11
LNB_+1V 11
STANDBY 3
DISEQC 11
LNB_EN 11
PANEL_ON/OFF 11
VCC_LNBA 13
USB_PORT1_5V 3,14