Circuit Descriptions
7.
7.4.6
Reset IC
The set uses the power 3V3 to reset. When 3V3SB drops
below 2.93 V, IC U4007 will send a reset to the main processor
IC MT5366.
Figure 7-16 Reset IC
7.4.7
Connector to IR/Key board
The CN4003 is taking care of the control signals to the
IR/LED/keyboard board.
Figure 7-17 Connector to IR/Key board
7.4.8
Connectors CN4005 and CN4006
Both connectors CN4005/CN4006 is for iTV purposes only.
Figure 7-18 Connectors CN4005 and CN4006
7.4.9
Connector CN4008
CN4008 is the service connector, CN4001 is for iTV models.
Figure 7-19 Connector CN4008
7.4.10 Audio Amplifier
The platform uses I
2
S to link the audio amplifier IC, it is using
pins 27, 28, 29 and 30 of IC U6006.
Figure 7-20 Audio Amplifier
7.4.11 Mute circuit
It is DC drop detect circuit. The +5VSB is monitored, when it
turned off or will be too low, the OFF_MUTE/Mute_339 will
send out a high pulse to turn on the related mute circuit.
Figure 7-21 Mute circuit
Reset IC
Reset-
ORESET#
+5VSB 3V3SB
U4007
MAX809STRG
U4007
MAX809STRG
GND
1
RE
S
ET
2
VCC
3
R4037
NC/39K 1/10W 1%
R4037
NC/39K 1/10W 1%
R4038
100K1/16W
R4038
100K1/16W
R4117
0 OHM +-5% 1/10W
R4117
0 OHM +-5% 1/10W
R4029
NC/10K 1/10W 1%
R4029
NC/10K 1/10W 1%
R4030
0 OHM +-5% 1/10W
R4030
0 OHM +-5% 1/10W
19080_220_110325.eps
110401
TO IR/KEY BOARD
ǂǂ
LIGHT_SENSOR
Key1
RC6
Green_Button
Key2
LED_G
3V3SB
+5V_SW
3V3SB
+5VSB
C4066
100N 50V
C4066
100N 50V
CN4003
CONN
CN4003
CONN
1
2
3
4
5
6
7
8
9
10
11
12
R4066
16K 1/10W 5%
R4066
16K 1/10W 5%
R4065
100R 1/10W 5%
R4065
100R 1/10W 5%
R4068
0R05 1/10W
R4068
0R05 1/10W
C4063
2U2 16V
C4063
2U2 16V
R4062
1K 1/10W
R4062
1K 1/10W
R4067
100R 1/10W 5%
R4067
100R 1/10W 5%
R4061
16K 1/10W 5%
R4061
16K 1/10W 5%
C4064
NC/
10N 50V
C4064
NC/
10N 50V
FB4002
600R/200mA
FB4002
600R/200mA
1
2
C4065
100N 50V
C4065
100N 50V
CN4004
NC/CONN
CN4004
NC/CONN
1
2
3
4
5
19080_221_110325.eps
110325
For LCD Clock
ǂǂ
ǂǂ
LCD_Clock_SCL
LCD_Clock_SDA
+5VSB
3V3SB
R4069
100 OHM 1/10W
R4069
100 OHM 1/10W
R4070
100 OHM 1/10W
R4070
100 OHM 1/10W
CN4005
CN4005
1
2
3
4
5
6
7
iTV
ǂǂ
RC6
3V3SB
3V3SB
D4002
BAV99
D4002
BAV99
3
1
2
CN4006
CONN
CN4006
CONN
1
2
3
4
5
R4073
NC/0 OHM +-5% 1/16W
R4073
NC/0 OHM +-5% 1/16W
R4071
NC/0 OHM +-5% 1/16W
R4071
NC/0 OHM +-5% 1/16W
R4072
100OHM1/16W
R4072
100OHM1/16W
19080_222_110325.eps
110401
---><---|>
---><---|>
U0TX
U0RX
ǂǂ
ǂǂ
U0RX
U0TX
3V3SB
3V3SB
+5VSB
R4080
4.7K1/16W
R4080
4.7K1/16W
CN4001
NC/CONN
CN4001
NC/CONN
1
2
3
4
R4081
100 OHM 1/10W
R4081
100 OHM 1/10W
R4082
100 OHM 1/10W
R4082
100 OHM 1/10W
D4001
BAV99
D4001
BAV99
3
1
2
D4005
BAV99
D4005
BAV99
3
1
2
CN4008
CONN
CN4008
CONN
1
2
3
R4079
4.7K1/16W
R4079
4.7K1/16W
19080_223_110325.eps
110325
I2S AUDIO AMP
ǂǂ
OSCL1
OUT1B
PLL_GND
OUT1A
AUD_VCC
BICKI
PLL_FILTER
AUD_VCC
SDI
LRCLKI
VDD_PLL
XTI
A_ONSEL
OSDA1
A_GAIN
OUT2B
PWRDN
DDX3A
DDX3B
TW
EAPD
OUT2A
AMP_RESET
AUD_V33
AUD_V33
C6074
100N 16V
C6074
100N 16V
R6065
100R 1/16W 5%
R6065
100R 1/16W 5%
TP6010
TP
TP6010
TP
R6083
0R05 1/16W
R6083
0R05 1/16W
U6006
STA339BWTR
U6006
STA339BWTR
GND_SUB
1
SA
2
TEST_MODE
3
VSS
4
VCC_REG
5
OUT2B
6
GND2
7
VCC2
8
OUT2A
9
OUT1B
10
VCC1
11
GND1
12
OUT1A
13
GND_REG
14
VDD
15
CONFIG
16
OUT3B
17
OUT3A
18
EAPD/OUT4B
19
TWARN/OUT4A
20
VDD_DIG
21
GND_DIG
22
PWRDN
23
VDD_PLL
24
FILTER_PLL
25
GND_PLL
26
XTI
27
BICKI
28
LRCKI
29
SDI
30
RESET
31
INT_LINE
32
SDA
33
SCL
34
GND_DIG
35
VDD_DIG
36
Thermal Pad
37
C6053
100N 16V
C6053
100N 16V
R6066
100R 1/16W 5%
R6066
100R 1/16W 5%
C6062
100N 50V
C6062
100N 50V
TP6011
TP
TP6011
TP
TP6012
TP
TP6012
TP
TP6013
TP
TP6013
TP
C6069
100N 50V
C6069
100N 50V
TP6007
TP6007
19080_224_110325.eps
110401
SMD/0402
SMD/0402
SMD/0402
SMD/0402
SMD/0402
Mute CKT
OFF_MUTE
AMP_MUTE
Mute_339
PWRDN
+12V
+5VSB
3V3SB
DVDD3V3
R6073
NC/0R05 1/10W
R6073
NC/0R05 1/10W
D6001
BAS316
D6001
BAS316
A
1
K
2
R6074
0R05 1/10W
R6074
0R05 1/10W
R6071
4.7K1/16W
R6071
4.7K1/16W
R6069
10K1/16W
R6069
10K1/16W
R6076
1K1/16W
R6076
1K1/16W
D6005
BAS316
D6005
BAS316
A
1
K
2
Q6003
BC847BW
Q6003
BC847BW
+
C6085
220UF 16V
+
C6085
220UF 16V
Q6001
BC857BW
Q6001
BC857BW
1
2
3
R6077
100K1/16W
R6077
100K1/16W
D6004
BAS316
D6004
BAS316
A
1
K
2
R6068
10K1/16W
R6068
10K1/16W
D6003
BAS316
D6003
BAS316
A
1
K
2
R6075
4.7K1/16W
R6075
4.7K1/16W
R6062
0R05 1/16W
R6062
0R05 1/16W
R6070
22K 1/16W 5%
R6070
22K 1/16W 5%
19080_225_110325.eps
110401