Samsung HL67A750A1FXZA Service Manual page 85

7-3-7 Main Board-7
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Power
FROM IR/LED/CONTROL PCB
A5V
BD701
BEAD_CHIP
JE200-AIT-NP-13
100NF
25V
13
NC 10KOHM
12
GND
11
A5V
10
IR
IR
9
GND
8
KEY2
KEY2
7
KEY1
KEY1
6
LED_STB
LED_STB
5
LED_TIMER
LED_TIMER
4
LED_LAMP
LED_LAMP
3
GND
2
KEY_PWR
KEY_PWR
1
LED_BLUE
LED_BLUE
CN701
SW701
KPS-1105PYN
3
4
FGND
A3.3V
A3.3V
D701
MMBD4148SE
100V
FGND
SW_DDC
R701
HW_RESET
MICOM_EEPROM_WP
27KOHM
RESET_AMP
IR
2 1 1 2
HDMI_CEC
R776 R703 POWER_DET
100OHM Q701
0OHM
DZ701
PC_5V
CDS3C30GTH
48V
HDMI1_5V
FGND
HDMI2_5V
HDMI3_5V
DDC_VCC
DDC_WP
Q702
KTC3875S-Y
Samsung Electronics
POWER CHECK INDICATOR LED
B12V
2KOHM
LTST-C150GKT
A3.3V
R716
2.2KOHM IC702
RT9818C-42PV
/RESET,RESET
1 3
VDD
GND C714
C709
1UF
16V
25V 100NF
FGND FGND
1 A3.3V
2
C704
50V
10NF
FGND
FGND
R728
100OHM
R725 100OHM
R729
100OHM
R730
100OHM
C706 R731 100OHM
16V
X701
100NF
C702
24.0MHZ
22PF
100OHM
X_TAL_CHIP 1 33 R732
VDD5V PD5/PWM4/P10
2 32
R733
100OHM
GND PD4/PWM5/P11
3 31 1 2
R815
C703 OSCO PD3/PWM6/P12
100OHM
4 30 R816 1 2
OSCI PD2/PWM7/P13
5 29 1 100OHM 2
R709 R817
100OHM
22PF PB6/MSDA PD1/HOUT 100OHM
R710 6 28 R818 1 2
100OHM
PB5/MSCL PD0/VOUT
100OHM
R711 7 27 R819 1 2
100OHM
PB4/PAT/CLKO/NIRQ5 PA7/CLAMP/AD7
8 26 1 100OHM 2
R712 R820
100OHM
PB3/FDO/NIRQ4 PA6/1/2HO/AD6 100OHM
R713 9 25 R821 1 2
100OHM
PB2/FDI/NIRQ3 PA5/1/2HO/AD5
100OHM
10 24 R822 1 2
PB1/NIRQ2 PA4/AD4
11 23 100OHM
R714 R734
10OHM
PB0/NIRQ1 PA3/RXDA 100OHM
R735
100OHM
R736
A5V
100OHM
R737
C705 100OHM
50V
1NF
R721 100OHM
100OHM
R722
R723 100OHM
R724 100OHM
1 100OHM 2
R704
R715 1 100OHM 2
R717 1 100OHM 2
1 100OHM 2
R720
A5V
R708
1KOHM
FGND
L: DEFAULT
H: (D/L)
R775
C 2 1 2
B SW_DDC
E
4.7KOHM
FGND
CONNECTOR WITH DMD POWER AND ETC
B3.3V
TEMP_FAN3
DMD_FAN2
DMD_FAN1
B12V
BD702
C711
BEAD_CHIP
10UF 100NF
16V
A5V
D713
VLZ6V2B
FGND
A3.3V
A5V
delete
R764
4.7KOHM
LED_BLUE
1KOHM
1 2 2 C
Q706
B
R763 E
KTC3875S-Y
FGND A3.3V
LED_STB
LED_LAMP
LED_TIMER
LAMP_ERROR
C710
16V
100NF
SMICOM_DOWN
FGND
H: PROTECT L: WRITE
SW_9PIN_MICOM
SW_DEBUG_RS232 MICOM_EEPROM_WP
DDP_READY SCL_EEPROM
CPU_NRESET SDA_EEPROM
SW_POWER
SOUND_MUTE
PWR_GOOD
SCL_EEPROM
SDA_EEPROM
RDA_MICOM_DEBUG
TDA_MICOM_DEBUG
SCL_DOWN
SDA_DOWN
A3.3V
4.7KOHM TP701 TP702
R745 1 2
1 2
R746
R756 100OHM
KEY_PWR
4.7KOHM
KEY1
KEY2
AGC_NIM
AFT_NIM
RDB_MICOM
TDB_MICOM
OVER_VOLTAGE_DOWN
LVDS_EN
B3.3V
MP DELETE
A2008WVO-10P
10
GND TX_MICOM_DEBUG
9
GND
RX_MICOM_DEBUG
8
GND
0OHM 7
R766
TEMP_FAN3
R768 6
0OHM GND
R769 5
0OHM DMD_FAN2
4
DMD_FAN1
3
GND
2
B12V
1
B12V
CN702
C712
25V
B3.3V AND B1.2V OVER_VOLTAGE DETECT
A5V
B3.3V B1.2V
R762
4.7KOHM
R761 OVER_VOLTAGE_DOWN
4.7KOHM
1 2 2 C Q705
B
E
KTC3875S-Y
FGND
FGND
A3.3V
R770
H:(D/L)
- - 4.7KOHM
AT24C256BN-10SU-1.8
TP704 TP707 L:DEFAULT
IC703
8 1
R757
7 VCC A0 2 1 2 2
C Q703
WP A1 SMICOM_DOWN B
6 3
E
SCL A2 1KOHM
5 4
KTC3875S-Y
SDA VSS
TP706
FGND
TP703 TP705
- - -
R771
FGND
EMU_SCL
0OHM
SCL_DOWN
TP709
R772
EMU_SDA
0OHM
SDA_DOWN
TP708
Schematic Diagram
MICOM DEBUG
A3.3V
BD703
2 1
A3.3V 4
3
TDA_MICOM_DEBUG
2 BEAD_CHIP RDA_MICOM_DEBUG
1
GND
CN703
A3.3V
A5V
C713 R774
25V
100NF 4.7KOHM
IC704
FST3125MX
1 14
FGND
2 /OE1 VCC 13
1A /OE4
3 12
SDA_EEPROM_BAY
4 1B 4A 11
SDA_EEPROM
5 /OE2 4B 10
2A /OE3
6 9
SCL_EEPROM_BAY
7 2B 3A 8
SCL_EEPROM
GND 3B
FGND
2
Q704 C
B POWER_DET
E
KTC3875S-Y
47KOHM
R773
FGND
7-9