Philips 43PFL4902/F7 Service Manual page 60

Power Supply CBA Bottom View
CAUTION !
Fixed voltage (or Auto voltage selectable) power supply circuit is used in this unit.
If Main Fuse (F602) is blown , check to see that all components in the power supply
circuit are not defective before you connect the AC plug to the AC power supply.
Otherwise it may cause some components in the power supply circuit to fail.
5
CN1001
GP002
J1482
P-ON-H2
J1462
J1479
Protect3
J1477 BL-SW
J1480
Q1005
BL-ADJ
Q1004
CN651
Q1006
C657
C1002
J1471
P-ON+20V
C656
C655
D651
J1466
P-ON+20V
J1467
Q651
P-ON+20V
J1468
P-ON+20V
J1469
D652
P-ON+20V
Q657
Q658
J1490
C654
GND
GP001
J1464
D655-Cathode
2.5A 250V
4
BAA7U1F0102 1
C1014
IS
J1463
D1018
J1475 J1
N2
J1476
D655
T601
BC602
D621
C658
IC602
CAUTION ! : For continued protection against risk of fire,
replace only with same type 2.5A, 250V fuse.
ATTENTION : Utiliser un fusible de rechange de même type de 2.5A, 250V.
3
IC1602
ALL+3.3V
J1470
C1703
T1702
Q1703
T1701
J1445
T1701-2
J1446
T1701-4
C1702
J1487 PFC-VOUT
C618
J1489 PFC-VOUT
J1433 PFC-VOUT
J1432 PFC-VOUT
R618
Q603
Q1607
Q601
J1452
IS Q1604
J1486
PFC-GND
Q609
OUT J1457
VH
J1455
J1460
D610-Cathode
R616
10-17
Because a hot chassis ground is present in the power supply
circuit, an isolation transformer must be used when repairing.
Also, in order to have the ability to increase the input slowly,
when troubleshooting this type of power supply circuit,
a variable isolation transformer is required.
NOTE:
The voltage for parts in hot circuit is measured using
hot GND as a common terminal.
2
R1616
J1442
VSENSE
R1607
R1608
J1441
PFC-GND
J1444 Vcc
J1439
J1440
ZCDA
GDB
J1438
PRI-GND
J1437 ZCDB
T1602
T1601
BC1602
D1605
D1603
D607
C1622 C1621
D604
J1447
D605-Cathode
1
GP003
CN601
J1436
ZCDB
SA601
C604
R601
C614
D603
L601
C620
GP004
BAA7U1F01021