Philips 19pfl4505d/F7 Service Manual page 50

Main CBA Bottom View
CAUTION !
Fixed voltage (or Auto voltage selectable) power supply circuit is used in this unit.
If Main Fuse (F601) 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.
WF4
PIN 19 OF
CN302
WF3
PIN 17 OF
CN302
Reset
DIF+
J090
DIF- J085
WF2
IF-AGC
PIN 15 OF
J078
CN302
SCL
J077
WF5 SDA
PIN 13 OF
CN302
WF1
PIN 4 OF
CN302
J066
J061
GND
GND
CN102
7
E
4A/125V
CN903
D403
D410
J126
+7.0V
P-ON+5.0V J123
D408
Q636
C649
J091 D642
D659
J081 D302
D301
TU301
TU5V J074
J073
P-ON-24V
P-ON-H1
J070
J069
ALL+3.3V
RESET J067
P-ON-H2 J065
VT J063
J057
GND P-ON+3.3V
J054
J055
J053
GND
P-ON+3.3V
L301
J152
D303
GND
R699
J151
GND
GND J148
Q403
AG J147
D623
J049
GND
P-ON+5.0V JS103 J046
P-ON+5.0V
LED J044
Q402
Q171
RCV-IN J043
ALL+3.3V J040
S-SW J037
J048
EN
LIGHT
GND J159 J033
J036
J125
ALL+3.3V
AMP-R GND
1
S-SW J029
GND J026
GND J020
R679
CN901
J017
J019
P-ON+9.0V
GND
J012
Q801
-INV2
J011
M/SS
C806
SVRR
J005
D809
OUT2
GND
D805
C805
D
CAUTION ! : For continued protection against risk of fire,
replace only with same type 4 A, 125V fuse.
ATTENTION : Utiliser un fusible de rechange de même type de 4A, 125V.
NOTE:
The voltage for parts in hot circuit is measured using
hot GND as a common terminal.
R411
Q410
R684
R688
IC631
R649
D650
R650
CN904
R663
R656
C215
R686
R690
D405 +7.0V J156
+7.0V J096
GND
J102
R206
L201
D206
C648
C650
4 1
C201
R634
C632
BC201 GND J117
8
5
+24V J165
D415
+24V J072
D418
Q401
GND J060
VT J021
VT J056
L602
LVD J052
J051
P-ON-H2
R628 BC631
J045
GND
J064
4 IC621
1
GND
Q639
J112
C628
GND
5 8
J076 EN J032
J027
P-ON-24V
CN902
GND J028
GND J025
D666
P-ON+9.0V J018
C653
Q641
IC801
R676
C654
D413
D414
D808
J008
OUT1
J007
COLD
J004
C812 J097
GND
J098
AMP-R-SP
J145
ALL+3.3V
C
J144
KEY-IN1
10-16
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.
BC1002
R1186
C1060
D649
Q1029
J168
+24V
GND
C1051
C1011
D635
D645
C1068 C641
R1178
J101
J093
J114
GND J100
BL-SW
SSTCMP
GND J155
C401 GND
J087
J115
Q633
BL-ADJ
J084
DRV
C634
D644
R653
C645
D656
J062
GND
T601 Q631
+24V J169
D648
D634
J154
D1070
GND
J058
GND
D608
IC601
Q603
C608
C604
D614
R615
D616
J013
ZCD
C605
C609
C614
4
IS J016
1
OUT J014
R619
8
5
D617
R611 R610
IC602
D615
HOT
HOT
D605
L601
D603
RISK OF FIRE REPLACE FUSE AS MARKED
B A
Vref J130
Q1028
J122
J121
GND
J109
J106
VIN
28
4
15
14
1
GND
IC1033
J080
ISEN
J170
GND
J059
Q1033
GND
Q1032
3
J050
GND
J171
GND
D1080-C
J041
J035
GND
J161
GND
C692
2
J023
GND
J163
GND
D1080
J015
GND
J176
J177 GND
1
GND CN101
GND J160
GND J001
1 3
J009
CN873-4
8 2
9 1
CN872
CN873
2 1
BA01N7F01011