Philips 32PFH5500/88 Service Manual page 85

Circuit Diagrams and PWB Layouts
10-6-2 System Power 2
System Power 2
B02
Panel VCC=12V or 5V
+5V_SW
PANEL VCC FB750 FB751 R751
+12V Yes NC 5.1K
+5V NC Yes 0R
PANEL_VCC ON/OFF:(OPCTRL9)
10K 1/ 10W 5%
Normal:High
Stand_By:Low
5.1KOHM +-5% 1/ 10W
5K1 1/ 16W 5%
PANEL_VCC_ON/OFF R750
R759
10K 1/ 16W 5% C751
NC/4.7UF 10V
LNB POWER SUPPLY
C759
4K7 1/ 16W 5% 47NF 16V 220NF 16V
R766 C758
+12V
470PF 50V C757
LNB_EN
DVDD3V3
R777 NC/10K 1/ 16W 5% LNB_LINEDROP
R763 NC/10K 1/ 16W 5%
+12V
13/18V_SW
R765 100K 1/ 10W 5%
DVDD3V3
R769 10K 1/ 16W 5%
LINEDROP
LO : 13V/18V
HI : 14V/19V
QM15.2E LA 10.
Audio VCC= +12V
FB754
+12V_AU
120R
2
PANEL_VCC
+12V 1
FB755
120R
Q750
8 1
D D
7 2
D D
6 3
D D
5 4
S G
AON4421 +
C752
C750 220UF 16V
1UF 10% 16V
R752 R753
6K8 1/ 10W 5%
R751
Q751
BC847N3
L750 D750
22uH FB340M
1 2
+12V
L751
1uH
C772 C776 C771
100N 16V 10UF 16V 2.2uF 25V
U751
MP8126DF-LF-Z
1 16
SGND PGND
2 15
BY PASS SW
3 14
C754
VDD BST
4 13
0.1uF 25V
COMP VBOOST
5 12
EN VOUT
6 11
LINEDROP ILIMIT
7 10
C761
POK TCAP
8 9
22NF 25V
13V/18V EXTM
R767
10K 1/ 16W 5%
DISEQC_OUT
R760
R768 33R 1/ 16W 5% R779
100K 1/ 16W 5% 39K 1/ 16W 5%
Q756
MMBT3904
R771
NC/0R05 1/ 16W
C778
NC/100N 50V
EN 85
PVDD
1
2
C770
+ +
C762 NC/220UF 16V
NC/220UF 16V
D751
ESD & Surge
FB340M
Protect
C777
D752 100N 50V
FB340M
R778
33Kohm 1/ 16W +/-1%
R4293
4.99K 1/ 16W 1%
Add for Unicable
R770
10K 1/ 10W 1%
back to
2015-Sep-30
div.table
5,7,8,9,10,11,12,13,14,15,16,17,18,19 GND
PANEL_VCC_ON/OFF
13 PANEL_VCC_ON/OFF
12 PVDD
LNB_EN
15 LNB_EN
LNB_LINEDROP
17 LNB_LINEDROP
13/18V_SW
15 13V/18V_SW
TUNER_LNB
15 TUNER_LNB
DISEQC_OUT
15 DISEQC_OUT
TUN_LNB
17 TUN_LNB
LNB_LINEDROP
17 LNB_LINEDROP
TUNER_LNB
R4292
34.8K 1/ 16W
TUN_LNB
ZD4103
MM3Z3V6B
System Power 2
B02
GND
PVDD
C 2015-1-26
715G7030
19880_507.eps