Read Harman Kardon BDS 275_277_575_577 Service Manual online
A
A
B
B
C
C
D
D
E
E
4
4
3
3
2
2
1
1
BE RS232 SW Debug JACK
{LCDRD, ETTXEN} = 0 , Normal mode
{LCDRD, ETTXEN} = 1 , RST by SVO mode
{LCDRD, ETTXEN} = 2 , Monitor mode
{LCDRD, ETTXEN} = 3 , Test scan mode
TO AIRPLAY
UARXD
UATXD
DVCC33_IO_STB
OPWRSB
AVDD33_LDO
AVDD33_LDO
ETMDIO_AO2MCK
ETTXEN_VOUTD14
UARXD
UATXD
DVCC33_IO_STB
AVDD10_LDO
LCDRD
RESET_
RST_7181C
PD_7181C
LCDRD
ETTXEN_VOUTD14
ACTIVITYLED_G
LINKLED_Y
TXVN
RXVP
TXON1
TXOP1
RXIP1
RXIN1
TXVN_1
TXVP_0
TXVN_0
TXVP_1
RXVN
TXVP
IR
RD+
ACTIVITYLED_G
LINKLED_Y
TD+
TXVP_0
RD-
TD-
TXVN_0
TXVP_1
TXVN_1
3.3V_STBY
3.3V_STBY
3.3V_STBY
3.3V_STBY
3.3V_STBY
3.3V
LAN3.3V
LAN_GND
A1.8V
RESET_
2
VDINDE
8
RST_7181C 8
PD_7181C
8
INT_7181
8
BD_IR
RXVP
RXVN
TXVP
TXVN
LINKLED_Y
7
ACTIVITYLED_G7
R181
0
R181
0
R225
NC/49.9/1%
R225
NC/49.9/1%
CON1
4PIN/2.0mm
CON1
4PIN/2.0mm
1
1
2
2
3
3
4
4
CN16
RJ45 JACK
CN16
RJ45 JACK
GA
11
GC
12
YC
10
YA
9
13
13
14
14
8
8 7
7 6
6 5
5 4
4 3
3 2
2 1
1
C374
0.1uF/25V/Y5V
C374
0.1uF/25V/Y5V
R179
0
R179
0
R170
NC/0
R170
NC/0
R151
10K
R151
10K
R705
75/1%
R705
75/1%
R235
330
R235
330
C240 0.1uF/25V/Y5V
C240 0.1uF/25V/Y5V
C188
NC/1000pF/50V/X7R
C188
NC/1000pF/50V/X7R
R133
75/1%
75/1%
R133
75/1%
75/1%
R221
NC/49.9/1%
R221
NC/49.9/1%
R244
75/1%
R244
75/1%
C187
NC/1000pF/50V/X7R
C187
NC/1000pF/50V/X7R
R171
NC/0
R171
NC/0
R223
NC/49.9/1%
R223
NC/49.9/1%
R152
10K
R152
10K
FB35
NC/10/2A
FB35
NC/10/2A
CN1
2*12 2.0MM
CN1
2*12 2.0MM
1
2
3
4
5
6
7
8
9
10
11
12
R153
10K
R153
10K
C181
0.1uF/25V/Y5V
C181
0.1uF/25V/Y5V
C192
0.1uF/16V/X7R
C192
0.1uF/16V/X7R
U17
16P/SMD/H1245
U17
16P/SMD/H1245
TX+
1
CTT
2
TX-
3
NC
4
NC
5
RX+
6
CTR
7
RX-
8
RXN
9
RCT
10
RXP
11
NC
12
NC
13
TXN
14
TCT
15
TXP
16
R882
NC/0
R882
NC/0
R178
NC/0
R178
NC/0
C209 100pF/2000V
C209 100pF/2000V
C930
10uF/10V/Y5V
C930
10uF/10V/Y5V
R150
10K
R150
10K
C186
0.1uF/16V/X7R
C186
0.1uF/16V/X7R
R227
10
R227
10
C191
NC/1000pF/50V/X7R
C191
NC/1000pF/50V/X7R
R
146
10K
R
146
10K
R180
0
R180
0
C241 0.1uF/25V/Y5V
C241 0.1uF/25V/Y5V
R177
0
R177
0
FB31
10/2A
FB31
10/2A
R169
NC/0
R169
NC/0
R257
75/1%
R257
75/1%
C180
0.1uF/25V/Y5V
C180
0.1uF/25V/Y5V
R
138
10K
R
138
10K
U7D
MT8555ANBG
U7D
MT8555ANBG
DVCC33_IO_STB
J21
DVCC33_IO_STB
H21
AVDD33_LDO
J24
AVDD10_LDO
K21
AVSS33_LDO
H22
GPIO8
H24
ETCOL
J27
ETCRS
F26
ETMDC
J28
ETMDIO
J26
ETRXCLK
G26
ETRXD0
F25
ETRXD1
G27
ETRXD2
G28
ETRXD3
G25
ETRXDV
E25
ETRXER
E26
ETTXCLK
G24
ETTXD0
G23
ETTXD1
H23
ETTXD2
J23
ETTXD3
H26
ETTXEN
H25
ETTXER
F24
UARXD
J25
UATXD
K26
VSTB
L25
VDATA
M23
VCLK
M24
LCDRD
L26
IR
K25
RESET_
K23
OPWRSB
K24
R234
330
R234
330
R95
100
R95
100
R176
NC/0
R176
NC/0
TP38
TP38
R226
NC/49.9/1%
R226
NC/49.9/1%
C504
0.1uF/16V/X7R
C504
0.1uF/16V/X7R
R706
75/1%
R706
75/1%
R
139
10K
R
139
10K
R879
33
R879
33
C507
0.1uF/16V/X7R
C507
0.1uF/16V/X7R
7-11
7-11
Main Board Circuit Diagram: MT8555 HUB
Harman Kardon
BDS X75 + X77 Service Manual
Page 89 of 106
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