Philips 26MD257B/37 Service Manual page 137

Scaler Board Schematic Diagram-AUDIO AMP
1 2 3
A
FB801 BEAD
+24V AUDIO-VDD
1 2
C800 C801
470uF 35V 470uF 35V
+24V AUDIO-VDDA
B R809
10R 1/8W C802
470N 50V
NEAR AMP
C MUTE(GPIO_19): DV33SB ENGAGE
NORMAL: Low
MUTE: High
R818
Q802
MUTE
10K 1/10W
R825
1K 1/10W 5%
+12V
D
R826
10K 1/10W 5%
HP_MUTE
D801 BAS32L
2 1
K A
1 Q801
BC857BW
R824 1K 1/10W 5%
R827
10K 1/10W 5%
1 2
A K
D800 BAS32L
C830
220UF/25V
E
REMOVE AC
POP
SOUND CKT
F
+5V_SW
R817
SOUND_EN POWERUP
100R 1/10W
G
H
1 2 3
7.Circuit Diagrams and PWB Layouts
4 5
ROUTE SYMMETRICALLY
R803
C816
AO1AUXL
4K7 1/10W
1U 16V
U801
1
VSSD/HW
R802 C817
2
IN1P
AO1AUXL_GND
3
4K7 1/10W IN1N
1U 16V
4
DIAG
ENGAGE
5
ENGAGE
POWERUP
6
POWER UP
7
CGND
AUDIO-VDDA
8
VDDA
39K 1/10W R804
9
VSSA
100N 50V C819
10
OSCREF
100N 50V C820
11
HVPREF
47U/25V C821 12
INREF
ROUTE SYMMETRICALLY
100N 50V C822
13
TEST
R807
AO1AUXR
14
IN2N
4K7 1/10W
C823
15
IN2P
1U 16V
R801
16
VSSD/HW
AO1AUXR_GND
4K7 1/10W
C824
1U 16V
U801
Model
26/32 TDA8933T
37/42 TDA8932T
4 5
6 7 8
S-15
1,2,3,4,5,6,7,8,9,10,11,12,13,14,16,17
R821
1,2,12,13,14,16,17
0R05 1/8W
R822
0R05 1/8W
IC TDA8932T
C812
1000uF 25V
32
VSSD/HW
31
OSCIO
30
HVP1
29 AUDIO-VDD
R814
VDDP1
C828
28
BOOT1 22R 1/4W
470P 50V
27
OUT1
L801
26
VSSP1
25 33uH
STAB1
L802
24
STAB2
33uH
23
VSSP2
22
OUT2
C809
R813
21
BOOT2
470P 50V
22R 1/4W
AUDIO-VDD
20
VDDP2
19
HVP2
C807
18
DREF
1000uF 25V
17
VSSD/HW
LOUT+
1
LOUT-
2
63382 2P 2.0MM
ROUT+
ROUT-
63383 3P 2.0mm
6 7 8
9 10 11
+12V
1,2,17 +12V
+24V CN801 F9
1,2 +24V
GND
CN802 G9
GND
C800 A2
C801 A3
C802 B3
C803 C7
HP_MUTE C804 C7
14 HP_MUTE
DV33SB
C805 D7
2,5,6,7,16 DV33SB
+5V_SW
+5V_SW C806 D7
SOUND_EN
5 SOUND_EN C807 E8
MUTE
5 MUTE
C808 E7
C809 E8
C810 D8
AO1AUXR
C811 D8
14 AO1AUXR
AO1AUXL
14 AO1AUXL C812 C8
AO1AUXR_GND
14 AO1AUXR_GND C813 E7
AO1AUXL_GND
14 AO1AUXL_GND
C814 E7
C815 D7
C816 C5
C817 D5
C818 C2
C819 D5
C820 D5
C821 E5
C822 E5
C823 E5
C824 E5
C825 C5
C826 E5
C827 D8
C828 D8
C829 D8
C830 E2
D800 E1
D801 D1
FB801 A2
L801 D8
L802 D8
Q801 E2
LOUT-
Q802 C2
R801 E4
R802 D4
R803 C4
R804 D5
R805 D7
R806 E5
LOUT+ R807 E4
R808 D7
R809 B2
ROUT-
R810 C5
R811 D7
R812 D7
R813 E8
R814 D8
R815 C2
R816 F2
R817 G2
ROUT+ R818 C2
R819 C2
R820 G2
R821 B7
R822 B7
R824 E1
R825 D2
R826 D2
R827 E2
TP800 F8
TP801 F8
TP802 G8
TP803 G8
TP804 A3
CN801 TP805 B3
TP806 C2
TP807 G2
TP808 C5
TP809 D5
TP810 E5
TP811 E5
U801 C6
ZD801 F8
ZD802 F8
ZD803 G8
ZD804 G8
CN802
1
2
3
9 10 11
TPM1.0U LA 35
A
B
C
D
E
F
G
H