Panasonic UB-T781 / UB-T781W / UB-T761 Service Manual ▷ View online
81
UB-T781/T781W/T761
2
3
B
D
A
C
5
4
2/2
UB-T781/T781W/T761
Audio Board
Audio Board
1
B
D
A
C
2
3
5
4
1
indicates that the parts circled by this mark is not mounted.
IC802
RINP
3
AGND1
4
LINP
5
LINN
6
NC2
7
GAIN0
8
GAIN1
9
MSTR/*SLV
10
SYNC
11
VREG
15
VBYP
16
AGND2
17
BSLP
18
LOUTP1
19
LOUTP2
20
LOUTN1
21
LOUTN2
22
BSLN
23
NC6
25
PVCCL1
26
PVCCL2
27
PGNDL1
28
PGNDL2
29
VCLAMPL
30
VCLAMPR
31
PGNDR1
32
PGNDR2
33
NC8
37
BSRN
38
ROUTN1
39
ROUTN2
40
ROUTP1
41
ROUTP2
42
BSRP
43
*SHUTDOWN
44
MUTE
45
NC1
1
RINN
2
NC3
12
NC4
13
ROSC
14
NC5
24
PVCCR1
34
PVCCR2
35
NC7
36
FAUL
T
46
NC9
47
AVCC
48
GND
49
1u
C901
1u
C902
1u
C903
1u
C904
1u
C906
10u
C905
100k
R91
1
100k
R912
100k
R915
R913
0
R914
VREG
EQUALIZER_OUT_R
[1:6C]
EQUALIZER_OUT_L
[1:6C]
100k
R916
20
R917
1u
C908
0.22u
C909
0.22u
C910
VREG
470p
C931
470p
C932
20
R918
15u
L802
1
2
4
3
15u
L801
12
43
C933
100p
C936
100p
C937
100p
C938
CN802
1
2
1u
C911
25V
220u
C912
/
25V
220u /
C915
1u
C913
1u
C914
1u
C916
0.22u
C917
0.22u
C918
470p
C921
470p
C922
20
R920
20
R919
C923
100p
C926
100p
C927
100p
C928
CN801
1
2
VCC12
VCC12
1k
R946
100k
R947
D813
25V
47u
C835
/
Q812
D814
100k
R945
10k
R944
D815
D816
10k
R943
VCC12
GND
IC815
1
6
IC815
34
IC815
GND
2
VCC
5
VCC3.3V
D81
1
33
R932
100k
R933
IC810
1
6
IC810
3
4
IC810
GND
2
VCC
5
33
R931
Q810
22u
C832
VCC3.3V
33
R935
100k
R937
D812
VCC3.3V
33
R936
Q811
47u
C833
VR
[1:4A]
IC811
1
6
IC811
3
4
IC811
GND
2
VCC
5
100k
R938
VCC3.3V
3k
R939
100k
R940
IC813
1
7
IC813
6
2
IC813
GND
4
VCC
8
100k
R941
10u
C834
100k
R942
VCC3.3V
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
VCC3.3V
VCC3.3V
VCC3.3V
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
IC814
4
1
2
2
IC814
GND
3
VCC
5
IC813
3
5
TP4
SYNC
TP3
FALT
IC812
1
2
2
4
IC812
GND
3
VCC
5
C907
0.01u
1k
R923
10k
R930
10k
R934
10k
R924
10k
R925
10k
R922
10k
R921
Q815
GND
GND
GND
GND
IC806
NC
1
A
2
GND
3
VCC
5
Y
4
VCC3.3V
GND
0.1u
C837
0.1u
C838
0.1u
C839
0.1u
C840
0.1u
C841
0.1u
C842
0.1u
C843
GND
3.3u
C925
3.3u
C924
3.3u
C935
3.3u
C934
SPEAKR-R
SPEAKR-L
MUTE
*SHUTDOWN
VCC3.3V
VCC3.3V
VCC3.3V
82
UB-T781/T781W/T761
11.4. Hub Board
100n
C1024
100n
C1022
100n
C1023
100n
C1027
100n
C1020
100n
C1013
100n
C1028
50
12p
C1009
100n
C101
1
16
1u
C1005
100n
C1017
100n
C1015
16
10u
C1026
16
10u
C1001
10
100u
C1029
16
10u
C1002
2
3
B
D
A
C
5
4
IC1004
1
*ENA
2
FLGA
3
FLGB
4
*ENB
5
OUTB
6
GND
7
IN
8
OUTA
IC1001
OUT
3
GND
2
IN
1
L1005
L1002
L1004
L1003
L1006
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
FG-USBD
FG-USB1
VBUS4
+5V
+3.3V
+3.3V
+3.3V
+3.3V
+3.3V
+3.3V
+3.3V
+3.3V
+5V
VBUS1
CL1007
CL1008
33
R1011
0
R1001
2.43k
R1015
0
R1025
15k
R1008
0
R1002
10k
R1014
510k
R1018
510k
R1016
0
R1024
10k
R1013
0
R1023
0
R1026
0
R1010
0
R1009
10k
R1017
10k
R1007
GND
0
R1012
10
100u
C1025
GND
IC1003
VOUT
1
VDD
2
GND
3
CT
5
NC
4
GND
100n
C1016
+3.3V
GND
6.3
4.7u
C1014
6.3
4.7u
C1010
6.3
4.7u
C1018
100n
C1019
CL1003
CL1005
VBUS3
LF1001
1
2
4
3
LF1002
1
2
4
3
JK1002
1
2
3
4
L1001
100n
C1003
100n
C1006
30M
X1001
IC1002
VDD25OUT
1
VSSREG
2
LED4
3
LED3
4
LED2
5
LED1
6
GREEN
7
AMBER
8
VDD33_1
9
X1
10
X2
11
VDD25_1
12
BUS_B
13
TEST
14
RREF
15
A
VSSR
16
A
VDD1
17
AV
S
S
18
A
VDD2
19
VDD33_2
20
DMU
21
DPU
22
VSS1
23
VDD25_2
24
DM1
25
DP1
26
VSS2
27
DM2
28
DP2
29
VDD33_3
30
DM3
31
DP3
32
VDD25_3
33
DM4
34
DP4
35
VSS3
36
SYSRSTB
37
PPB4
38
CSB4
39
PPB3
40
CSB3
41
VSS4
42
PPB2
43
CSB2
44
PPB1
45
CSB1
46
VBUSM
47
VDD33REG
48
1.5n
C1021
LF1005
1
2
4
3
0
R1038
GND
JK1005
1
2
3
4
L1012
VBUS2
L1011
0
R1037
GND
100n
C1036
CL1012
0
R1032
FG-USB2
CL1015
0
R1029
LF1004
1
2
4
3
0
R1036
GND
JK1004
1
2
3
4
L1010
VBUS3
L1009
0
R1035
GND
100n
C1035
CL1011
0
R1031
CL1014
0
R1028
GND
VBUS4
0
R1034
L1007
LF1003
1
2
4
3
CL1013
0
R1033
L1008
0
R1030
0
R1027
GND
CL1010
FG-USB4
JK1003
1
2
3
4
100n
C1034
100n
C1007
GND
100n
C1008
CL1004
+5V
16 10u
C1004
IC1005
1
*ENA
2
FLGA
3
FLGB
4
*ENB
5
OUTB
6
GND
7
IN
8
OUTA
100n
C1030
GND
10
100u
C1033
10
100u
C1031
GND
GND
VBUS2
VBUS1
+5V
16
10u
C1032
+3.3V
10k
R1019
510k
R1022
510k
R1020
10k
R1021
470
R1003
470
R1004
D1002
Blue
470
R1006
D1001
RED
470
R1005
CN1001
1
+5V_LED
2
GND
3
LED RED
4
LED BLUE
5
GND
6
GND
7
GND
8
+5V
9
+5V
10
+5V
CL1002
16
22u
C1037
GND
50
12p
C1012
CL1001
CL1016
FG-USB2
+5V
+3.3V
GND
GND
100n
C1039
100n
C1040
100n
C1041
100n
C1042
100n
C1044
100n
C1045
100n
C1046
100n
C1047
100n
C1048
100n
C1043
JK1001
VBUS
1
D-
2
D+
3
N.C.
4
GND
5
SD3
8
SD4
9
SD1
6
SD2
7
USB (B-Connector)
VBUS
D-
1%
USB(H) (1-Connector)
GND
D+
N.C.
D+
USB(H) (2-Connector)
GND
VBUS
D-
D+
USB(H) (3-Connector)
GND
VBUS
–
D-
D+
D-
GND
USB(H) (4-Connector)
VBUS
Power I/F
1/1
UB-T781/T781W/T761
Hub Board
Hub Board
1
2
3
5
4
1
B
D
A
C
indicates that the parts circled by this mark is not mounted.
83
UB-T781/T781W/T761
11.5. Sensor Board
2
3
B
D
A
C
4
+
-
IC600
3
2
1
+
-
IC600
5
6
7
Q600
Q605
Q601
IC601
VOUT
1
V-
2
VIN+
3
V+
5
VIN-
4
+
SN600
Q602
IC602
VOUT
1
V-
2
VIN+
3
V+
5
VIN-
4
+
SN601
22u
L602
D600
D601
+
-
IC603
1
3
4
10k
R627
22u
L603
4.7k
R615
100n
C618
560
R632
4.7k
R624
2.2k
R613
100n
C615
Q604
2.7k
R602
2.2k
R601
Q603
2.2k
R612
100n
C602
100n
C629
Q609
E1
1
B1
2
C2
3
E2
4
B2
5
C1
6
47
R638
100n
C624
IC603
GND
2
VCC+
5
2.7k
R620
10k
R611
Q606
100n
C628
3.3k
R625
47
R631
3.3k
R605
4.7n
C621
4.7n
C623
330p
C608
470
R614
680p
C609
100n
C604
0
R633
12k
R628
1n
C613
4.7k
R608
16
R629
4.7k
R621
12k
R630
330p
C610
3.3k
R626
Q607
100k
R622
10n
C605
3.9k
R606
100n
C619
4.7k
R609
6.8k
R616
2p
C611
22u
L600
6.8k
R617
100n
C614
100k
R623
2.7k
R604
10n
C606
2.2k
R603
3.9k
R607
100n
C620
100n
C603
4.7k
R610
6.8k
R618
2p
C612
22u
L601
6.8k
R619
47
R637
4.7k
R635
15k
R636
Q608
100n
C625
22k
R642
2.2k
R639
100n
C626
10k
R641
Q610
10k
R640
IC600
VSS
4
VDD
8
CL604
CL603
CL602
CN601
GND
1
SONIC_L
2
GND
3
+5V
4
GND
5
SONIC_R
6
GND
7
+5V
8
GND
9
LED
10
+5V
11
RHH
12
CN600
RTH 1
GND
2
CL600
CL601
100u
C627
10
100u
C617
10
100u
C616
16
10u
C600
16
10u
C601
16
10u
C607
CL605
CL606
CL607
CL608
CL609
CL610
CL611
CL612
CL613
CL614
CL615
CL616
CL617
CL618
CL620
CL621
CL622
CL623
CL624
CL625
CL626
CL627
CL619
CL628
CL629
CL630
CL631
CL632
CL633
CL634
CL635
CL636
CL637
CL638
CL639
CL640
CL641
CL642
CL643
100n
C630
100n
C631
100n
C632
100n
C633
100n
C634
100n
C635
100n
C636
2.7k
R634
1.6k
R644
10k
R645
16
R643
15k
R600
100n
C637
100n
C638
100n
C639
100n
C640
100n
C641
100n
C642
1
2
3
5
4
1
6
B
D
C
1/1
UB-T781/T781W/T761
Sensor Board
Sensor Board
84
UB-T781/T781W/T761
11.6. Pen Board and Pen FPC
2
3
B
D
A
C
5
4
CF1
100n
C3
10m
L1
1
2
3
4
5
2
3
4
5
678
9
1
0
D5
IC3
VSS
4
NC
3
VOUT
1
VIN
2
Q3
D10
IC4
VDD
1
GP5/T1CKI/OSC1/CLKIN
2
GP4/*T1G/OSC2/CLKOUT
3
GP3/*MCLR/VPP
4
GP2/T0CKI/INT/COUT
5
GP1/CIN-/ICSPCLK
6
GP0/CIN+/ICSPDAT
7
VSS 8
100k
R14
100k
R15
C
CN1
1
CN1
2
1
2
3
4
5
CN2
6
1
2
3
4
5
2
3
4
5
CN3
6
100n
C7
C2
100uF
D6
1
2
3
47u
C4
47u
C5
47u
C6
1M
R1
1
15k
R12
15k
R13
47k
R17
D8
SW1
2
4
1
3
C
10k
R10
1n
C9
220
R9
100
R16
1n
C8
220
R7
C
T1
5
1
3
4
6
2
47u
C13
IC2
CE
1
VOUT
2
NC
3
Lx
5
VSS
4
C12
(-)
BT1
(+)
BT2
4.7k
R6
D7
15k
R8
Q4
Q5
220k
R20
220k
R19
1M
R18
220k
R21
47k
R22
D1
1
C10
C1
1
C
100n
C14
1M
R5
SW2
2
1
3
D9
To Pen FPC
IR
US
*BW
PSW
BSW
*PDM
For adjustment
To US
+12V
US_DRIVE
GND
GND
+12V
+12V
+5V
IR_ON
GND
NC
BVDT
BSW
DC/DC_ON
*PDM
1
D1
D2
D3
D4
Q1
IC1
NC1
1
NC2
2
K
3
REF
4
A
5
Q2
220
R1
47k
R2
2.2
R3
220
R4
1n
C1
D
S
G
C
E
B
A
K
A
K
K
A
K
A
6
5
4
3
2
1
To CN2 on Pen Board
UB-T781/T781W/T761
Pen Board and Pen FPC
Pen Board and Pen FPC
1/1
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