Supply & Dc Protection (Diagram A7) - Philips 42PF9945 Service Manual

Circuit Diagrams and PWB Layouts
Supply & DC Protection
1 2
SUPPLY & DC PROTECTION
A
F730 = 14V4
F735 = 9V
FROM DIAGRAM
F740 = -14V4
F745 = -8V8
FROM DIAGRAM
FROM DIAGRAM
B
FROM DIAGRAM
SUPPLY
0302
PH-S
F710
9
C
F711
8
TO 1302 7
F712 F713
SA 6
5
AUX SUPPLY
4
F717 F718
3
2
D
F723 F724
1
RES=RESERVED
E
F796 F797 F798
3799
RES
0305 0390
SHIELDING 3.3 SHIELDING 3.3
F
3122 123 6002.5
1 2
FTP1.1E 7.
3 4
AUDIO AMPLIFIER LEFT HIGH
AUDIO AMPLIFIER LEFT LOW
AUDIO AMPLIFIER RIGHT HIGH
AUDIO AMPLIFIER RIGHT LOW
1730
T2.5AL 250V
7735
BC869
+14V4
DC_PROT F736
+9V_STBY 9V8
7736
F732
BC847BW
F714 5714
9V2
100MHZ
5719 F720
F719
100MHZ
1740
F725 5725
100MHZ
T2.5AL 250V
-14V4
F746
-9V7
7746
F742
BC857BW
-9V2
F799
C704
C703
0391
SHIELDING 3.3
C702
GND_O
3 4
41
5 6
DC PROTECTION
OUT_LH
OUT_PROT
OUT_LL
OUT_PROT
OUT_PROT
OUT_PROT
F730
VSND_POS
F735
9V
VCC_10_POS
F759
13V7
3733
1K
F733
6750
BAV99W
F740
VSND_NEG
6760
7745 BAV99W
BC868
F745
-8V8
VCC_10_NEG
-13V7
3743
1K
F743
OUT_RH
OUT_RL
GND_O
5 6
7 8 9
0303
PH-S
5
NC.
F771 F770 F772
4
GND_O LEFT HIGH
3
8 Ohm
2
F776 F777 F774
1
LEFT LOW
GND_O
GND_O GND_O
+9V_STBYA
8V7
7753
BC857BW
7751
BC847BW
8V6
3750
1 2
470R
7761
3
BC857BW
7755
BC847BW
3760
2
470R
1
3
0304
PH-S
F780 F781
4
RIGHT HIGH
F782
3
GND_O
F784 8 Ohm
2
GND_O
F786 F787
1
RIGHT LOW
GND_O CL 36532053_087.eps
7 8 9
0302 C1 F770 A8
0303 A8 F771 A8
0304 E8 F772 A8
0305 E1 F774 A8
0390 E2 F776 A8
0391 E3 F777 A8
1730 B3 F780 E8
1740 D3 F781 E8
2730 C3 F782 F8
A 2732 C4 F784 F8
2734 D5 F786 F8
2740 E3 F787 F8
2742 E4 F796 E2
2744 E5 F797 E2
2752 C9 F798 E2
2753 C8 F799 E2
2759 D8
2760 B7
2770 B8
2771 B7
+9V_STBY 2780 F7
2781 F7
B
2799 F1
3732 C4
3733 C5
3742 E4
3743 E5
3749 C6
3750 C8
3751 C9
3752 C9
3754 C9
3755 D6
-0V2
3760 D8
3765 E6
C
3770 B7
3771 B7
3780 E7
3781 E7
3799 E2
5714 C3
5719 D3
5725 D3
5753 B9
6732 C4
6742 E4
6750 D7
D 6760 D7
7735 C5
7736 C4
7745 D5
7746 E4
7751 C8
7753 C9
7755 D8
7761 D9
C702 F3
C703 E3
C704 E3
F710 C2
E
F711 C2
F712 C2
F713 C2
F714 C2
F717 D2
F718 D2
F719 D2
F720 D3
F723 D2
F724 D2
F725 D2
F730 B5
F732 C4
F
F733 C5
F735 C5
F736 C4
F740 D5
F742 E4
F743 E5
F745 D5
180703
F746 E4
F759 C7