Philips BT2500B/W-00 Service Manual page 29

BT speaker
U2
UTC4558
4558_VCC 8 1
+VCC OUT1
C20
R24 NC
AUX_INA NC
7 2
OUT2 1IN-
R26
C19
R23
C73 NC
0R NC
NC
6 3
2IN- 1IN+
R22
AUX_IN R18
NC
R25 NC
NC
5 4
1/2VCC
2IN+ -VCC
A
4558_VCC
1/2VCC
R8 10K
R9 C9
C60 C61
C59 C10
104
226 226
104
226
C82 10K
22P
U1
D2761
10 1
GND V+
R91 22K
NC
C51
9 2
OUTB OUTA
334 334
C52 C46
8 3
INB INA
683
C47
7 4
SW INT
NC
R94
224
C49
6 5
SENSE VREF
R72
R73
10K
20K_1%
Circuit Diagram
R4 1K
C6 NC C7 334
10K
R1
R93
C8 R5 Q1
OR 8050
NC
NC
VCC
R56 10K
B
R74
R6
R3
10K
C74
C4 56K
6.8K
NC
473 C80
NC
R92
C5
NC
224
100R
R7
VCC
C62
C81
226
22P
100R
R71
VCC
C58
C57
104 226
333
C53
A
820R
R77
334
C50
AUDIO
106
C71
4-2
C1
C77 104
22P
36 VSS
35 SVCC
C38 C56
106
34 VREF
474
INNB
33
32 INPB
0R
R63
C40 22P
31 GAIN1
NC
R65
474
C78
100K
R62
GAIN0
30
NC
R66
29 SVR
22P R82 C2 105
100K
R67
C41 28 DIAG
56K_1%
C
27 SGND
C3
104
VDDS
26
C15
104
E
25 SYNCLK
39K
R59
24 ROSC
23 INNA
INPA
22
MUTE
21 MUTE
STBY
20 STBY
VDDPW
19
IC3
TDA7491P
SSOP-36
SUB_GND
1
OUTPB
2
C36
OUTPB 3 330P
PGNDB
4
PGNDB 5
R60
22R
PVCCB
6
PVCCB
7
OUTNB 8
OUTNB 9
OUTNA 10
OUTNA
11
22P
C48
10P
C83
PVCCA 12
PVCCA 13
PGNDA 14
PGNDA
15
OUTPA 16
OUTPA 17
PGND
18
GAIN0 GAIN1 Nominal gain
0V 0V 20dB
0V 3.3V 26dB
3.3V 0V 30dB
3.3V 3.3V 32dB
L2
15UH
C32
224
CN1
C43
474
C45
224
L3
15UH
VCC
C35
C37
470uF/16V
104
C89
C90
106
106
STBY
Mode
MUTE
0V 0V Standby
3.3V
0V Standby
0V
3.3V
Mute
3.3V 3.3V
Play