Philips 19pfl4505d/F7 Service Manual page 49

Main CBA Top View
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.
J130 Vref
Q1028
J121
GND
J109
J106
VIN
4
J170
GND
Q1033
3
J050
GND
J171
GND
D1080-C
J041
J035
GND
J161
GND
2
J023
GND
J163
GND
D1080
J015
GND
J176
GND
J177
1 CN101
GND
J160 GND
J001 GND
3 1
J009
CN873-4
2 8
1 9
CN872
CN873
1
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.
BC1002
C1060
Q1029
J168
+24V
J122
GND
C1051
C1011
D635
D645
C641 C1068
R1178
J101
J093
J114 GND
J100
SSTCMP BL-SW
J155 GND
GND C401
J087
J115
Q633
GND
BL-ADJ
J084
DRV
J080
C634
ISEN
D644
R653
C645
D656
J062
GND
Q631
T601
J169 +24V
D648
J059
GND D634
J154
Q1032 GND
J058
GND
D608
IC601
Q603
C608
C604
D614
R615
D616
J013
ZCD
C605
C609
C692 C614
J016 IS
J014 OUT
R619
D617
R610 R611
D615
HOT
HOT
D605
L601
D603
RISK OF FIRE REPLACE FUSE AS MARKED
2
A
Q410
R684
D649
R688
R649
D650
R650
CN904
R663
R656
C215
R686
R690
J156 +7.0V D405
J096 +7.0V
GND
J102
R206
L201
C201
R634
C632
J117 GND BC201
J165 +24V
J072 +24V
D418
D1070
GND Q401
J060
J021 VT
J056 VT
J052 LVD
J051
P-ON-H2
BC631 R628
J045
GND
J064
GND Q639
J112
GND
EN
J032
J027
P-ON-24V
CN902
J028 GND
J025 GND
D666
J018 P-ON+9.0V
C653
Q641
R676
C654
D413
D414
D808
COLD
J097
C812
GND
J098
AMP-R-SP
J145
ALL+3.3V C
J144
KEY-IN1
B
10-15
CAUTION ! : For continued protection against risk of fire,
replace only with same type 4 A, 125V fuse.
4A/125V
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.
BA01N7F0101 1
R411
CN903
D403
D410
J126
+7.0V
J123 P-ON+5.0V
D408
Q636
C649
D642
D659
D206 D302
D301
TU301
C648
C650
J074 TU5V
J073
P-ON-24V
P-ON-H1
J070
J069 ALL+3.3V
D415
J067 RESET
J065 P-ON-H2
J063
VT
J057
P-ON+3.3V GND
J054
J055
L602 J053
GND
P-ON+3.3V
L301
J152
D303
GND
R699
J151
GND
J148
Q403
D623 J049
GND
J046 JS103 P-ON+5.0V
P-ON+5.0V
J044 LED
C628
Q402
Q171
J043 RCV-IN
J040 ALL+3.3V
J037 S-SW
J076 EN
J159 GND
J033 J036
J125
ALL+3.3V
GND AMP-R
J029 S-SW
J026 GND
J020 GND
R679
CN901
J017
J019
P-ON+9.0V
IC801
GND
J012
Q801
-INV2
J011
M/SS
C806
J008
OUT1
J007 SVRR
J005 D809
OUT2
J004 GND
TOOL NO.
D805
C805
C7A3 A3
D
J091 Reset
J090 DIF+
J085 DIF-
J081 IF-AGC
J078
SCL
J077
SDA
J066
J061
GND
GND
GND
J147 AG
J048
LIGHT
CN102
1
7
E
1 2 3 4 5 6 7 8 9 10
BA01N7F01011