Philips FX20 Service Manual page 35

8-7
Circuit Diagram - Main board:Power
A
POWER INPUT
C3 C3
XP8 XP8
1
1
2
2
3 PCON PCON
8
3 PCON
6PIN/2.0mm/120mm 6PIN/2.0mm/120mm 4 R779 R779 1K 1K
4
1 5 R770 R770 1K 1K
5
6
6
C194 C194
XP1 XP1
4PIN/2.0mm/120mm 4PIN/2.0mm/120mm
1
33_V
1
2
2
3
3
4
GND GND
4
33_V 33_V
33_V R10 R10 0 0
2 R14 R14 0 0
D
AMP
S D
S D
S D
C19 C19
R30 R30 Q640 Q640
C20 C20
AP9579GH-HF AP9579GH-HF
C21 C21
100K 100K
R20 R20
R21 R21 10K 10K
2.2 2.2
R23 R23
220K 220K
R25 4.7K R25 4.7K
Q2 Q2
Power_EN
NPN_3DG3904M NPN_3DG3904M
C33 C33 R27 R27 C29 C29
10K 10K
VCC5V_D
3 R29 R29
1.8/2W 1.8/2W
R34 R34 5.6/1W 5.6/1W
DVCC3
Q5 Q5
TR_B1 Q6 Q6
TR_B1 TR_B2
PNP_3CA8550C PNP_3CA8550C PNP_3CA8550C PNP_3CA8550C
TP1 TP1
CE21 CE21 CE7 CE7
+ +
C36 C36 C38 C38 REGO2
+ +
REGO2
20K/1% R36 20K/1% R36 100uF/16V 100uF/16V
REGO1
REGO1
R37 R37
12K/1% 12K/1%
4
A
B
28V_1 28V_1
33V
POWER_FRQ2 8
8
POWER_FRQ1 C4 C4
0.1uF/50V/X7R 0.1uF/50V/X7R
33V
L4 L4
22uH/1A 22uH/1A
FB30 70/3A FB30 70/3A
R205 R205
100K 100K
CE6 CE6 + +
100UF/50V 100UF/50V
R235 R235
47K 47K
+12V_D
ZD2 ZD2
BZX79C33 BZX79C33
R28 R28
4.7K 4.7K
V_-24V
-24V
Q3 Q3
NPN_3DG3904M NPN_3DG3904M
R763 R763 R766 R766
33V_FM
220 220 220 220
+ +
VC12
TP2 TP2
VC12
VC12 4
C35 C35
B
C
BAV99 BAV99
D1 D1
R123 R123
C9 C9 0.1uF/50V/X7R 0.1uF/50V/X7R
C1 C1 0.1uF/50V/X7R 0.1uF/50V/X7R 3
2.2 2.2
U4 U4 R5 R5 47 47 C5 C5
TPS54260 TPS54260
470pF/50V/X7R 470pF/50V/X7R
1 10 1 2 D3 D3 MBRX180/80V/1A MBRX180/80V/1A
L2 L2
BOOT PH
2 9
VIN GND
3 8
EN COMP
4 7
SS/TR VSNS
5 6 3
RT/CLC PWRGD
22uH-48uH 22uH-48uH
R18 R18
R12 R12
NC/100 NC/100
20K 20K
+ +
R45 R45 R33 R33
51K 51K
1M 1M
C11 C11
R38 R38 4.7K 4.7K
NC/1000pF/50V/X7R NC/1000pF/50V/X7R
NPN_3DG3904M NPN_3DG3904M
Q7 Q7
DC FRQ 9
R39 10K R39 10K
MCU_3V3
33V_FM
33V
Q28 Q28
PNP_3CG3906M PNP_3CG3906M
FB867 120/1A FB867 120/1A
C31 C31
R32 R32
47K 47K
R24 R24
47K 47K
R26 4.7K R26 4.7K
Q4 Q4
Power_EN
NPN_3DG3904M NPN_3DG3904M
R31 R31
C32 C32 C30 C30
10K 10K
VCC5V_D
FB19 FB19
close to LDO
500/800mA 500/800mA
U24 U24
78L05 78L05 Q27 Q27 L491 L491
NPN_MMBT8050C NPN_MMBT8050C 10uH/100mA 10uH/100mA
3 1
IN OUT
R765 R765
+ +
470 470
CE35 CE35 R764 R764 100 100
47uF/16V 47uF/16V
C766 C766
S
ZD752 ZD752 1uF/10V/Y5V 1uF/10V/Y5V
BZV55C3V9/3.9V BZV55C3V9/3.9V
S
C
8-7
D E
-24V
R124 R124
1
2.2 2.2
2
C2 C2 CE1 CE1
0.1uF/50V/X7R 0.1uF/50V/X7R 47uF/50V 47uF/50V
ZD6 ZD6
ZMM27/27V ZMM27/27V
C6 470pF/50V/X7R C6 470pF/50V/X7R +12V
VCC5V
70/3A 70/3A FB801 FB801
R153 R153
33K/1% 33K/1%
+ +
ZD753 ZD753
R13 R13
5.6K/1% 5.6K/1%
R152 R152
470 470
U14 U14
VCC5V TJ4203GSF5-ADJ TJ4203GSF5-ADJ
R22 R22 2.2 2.2
1 5 close to LDO
VIN VOUT
close to DC/DC
C26 C26
C25 C25 C27 C27
2.2UF 2.2UF 4.7UF/10V/X5R 4.7UF/10V/X5R
3 4
EN ADJ/SENSE
GND
+12V_D
Q13 Q13
L5 L5
VCC5V
D S
FB31 70/3A FB31 70/3A
C22 C22 N_AP2316 N_AP2316
0.1uF/50V/X7R 0.1uF/50V/X7R
FM33V
33V_FM
R4 R4
47K 47K
R3 R3 220K 220K
27.5V
VGS=20V
VDS=30V Q12 Q12
+12V
FB24 FB24
D S
N_AP2316 N_AP2316 R6 R6
10 10 C23 C23
0.1uF/50V/X7R 0.1uF/50V/X7R
D E
1
FB4 FB4
MCU_3V3
500/800mA 500/800mA 2
C28 C28
0.1uF/25V/Y5V 0.1uF/25V/Y5V
22uH/3.3A 22uH/3.3A VCC5V_D
C37 C37
3
0.1uF/50V/X7R 0.1uF/50V/X7R
+12V_D
500/800mA 500/800mA
VFD_12V_D
4