Philips 50PFL4909/F7 Service Manual page 48

Power Supply CBA Top 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.
1
CN1301
J1410
A
J1416
GND
J1402
CN1101
J1413 ADIM4
Protect3
B
J1317
GND
J1313
J1302
ADIM3
BL-ADJ
J1312
J1306
BL-SW
J1311
Protect3
JS1235
J1316
C SPWM3
J1210
AMP+13V
J1216
GND
JS1135
J1272
ADIM2
J1202
J1211
BL-ADJ
J1212
OVP2
BL-SW
Protect3
J1213
D
J1269
J1273
ADIM1 J1102
J1274
E
CAUTION ! :
2.5A 250V
ATTENTION : Utiliser un fusible de rechange de même type de 2.5A, 250V.
2 3 BA4GU5F0102 1
CN1401
J655 P-ON+21V
AMP+13V
CN501
ALL+3.3V
AMP+13V
D715
Q1401 Gate
J1403
J654
D715 Reference
C657
D654
J1407
R1415
D658
VLED4
J1406
C655
OVP4
C1417
J1309
ILED3
J1303
Q1301 Gate
C656
C651
J1308
LED+48V
D650
C650
D650
J1307
D652
OVP3 VLED3
C1317
J665
GND
J1203
Q1201 Gate
J1208
LED+48V
VLED2
J1207
C1217
J1206
J1109
ILED1
Q1101 Gate
C724
D713
J1103
J1108
LED+48V
D704
J702
D704 Cathode
J1107
VLED1
J1106
OVP1
C1117 C726
J701
LED+48V
J103
Outer GND
For continued protection against risk of fire,
replace only with same type 2.5A, 250V fuse.
CAUTION -
4
RISK OF FIRE -
J656
J664 REPLACE FUSE AS MARKED
J659
AMP+13V
Q701 Base C692
J658
C1618
P-ON H2
J663
J606
IC602
D660
Vcc+15V
C615
D660 Cathode J662
D621
D619
D620
R618
J666
Anode
C605
C619
D607
C1708
J1614
Vcc+15V
J1613
PFC Vout
J1612
PFC Vout
J1620
D1714 Cathode
J1703
IC1701 Out
J1619
IC1702
Vcc+15V
J1610
Q1704
Vcc+15V
J1702
Q1701 Collector
C1711
TOOL NO.
1 2 3 4 5 6 7 8 9 10
10-15
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.
5 6
T 2.5A L/250V
CN601
F602
LIVE NEUTRAL
C604
IC601 Vcc
J607
C616
IC604
J601
IC601 ZCD
C620
J605
PFC GND
J610
IC601 VH
C614
D605
C1612 BC1601
R1624
BC1602
C1626
C1615
D1603
T1602
T1601
J1609
Pri GND
Pri GND
J1604
VSENSE
J1605
J1615
COMP
BA4GU5F01021