Read LG 55GA7900-UA (CHASSIS:LA37G) Service Manual online
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
GND
POWER_ON/OFF2_4
WOL_CTL
R3023
4.7M
OPT
C3004
0.1uF
16V
0.1uF
16V
R3009
10K
MICOM_JAPAN
SW3000
JTP-1127WEM
MICOM_RESET_SW
1
2
4
3
R3027
270K
OPT
R3026
10K
PANEL_CTL
SOC_RX
POWER_ON/OFF1
IR
SIDE_HP_MUTE
INV_CTL
MICOM_RESET
POWER_ON/OFF2_3
MODEL1_OPT_1
MODEL1_OPT_3
AMP_MUTE
AMP_RESET_N
R3006
10K
MICOM_LCD/OLED
R3012
10K
MICOM_LOGO_LIGHT
MODEL1_OPT_1
I2C_SCL3
KEY1
MODEL1_OPT_2
I2C_SDA3
MODEL1_OPT_0
+3.5V_ST
MODEL1_OPT_4
MODEL1_OPT_0
SOC_RESET
12V_EXT_PWR_DET
R3007
10K
MICOM_TOUCH_KEY
POWER_ON/OFF2_1
R3008
10K
MICOM_TACT_KEY
R3010
10K
MICOM_NON_JAPAN
KEY2
MODEL1_OPT_4
+3.5V_ST
RL_ON
POWER_ON/OFF2_2
R3005
10K
MICOM_PDP
X3000
32.768KHz
R3024
22
MODEL1_OPT_3
MODEL1_OPT_2
HDMI_CEC
POWER_ON/OFF2_3
MICOM_DEBUG
C3000
0.1uF
0.1uF
SOC_TX
R3013
10K
MICOM_NON_LOGO_LIGHT
POWER_DET
POWER_ON/OFF2_4
+3.5V_ST
HDMI_CEC
D3000
BAT54_SUZHO
R3029
120K
CEC_REMOTE
R3028
27K
27K
+3.5V_ST
RUE003N02
Q3001
HDMI_CEC_FET_ROHM
S
D
G
12V_EXT_PWR_DET
R3030
10K
MICOM_GP4_10PIN
R3031
10K
MICOM_GP3_12/15PIN
+3.3V_NORMAL
+3.3V_NORMAL
+3.3V_NORMAL
R3035
4.7K
OPT
+3.3V_NORMAL
R3036
10K
OPT
R3037
10K
OPT
R3032
10K
AMP_RESET_BY_MICOM
R3033
10K
C3002
8pF
C3003
8pF
R3000
10K
R3003
22
AMP_RESET_BY_MICOM
MODEL1_OPT_6
MODEL1_OPT_5
MODEL1_OPT_6
MODEL1_OPT_5
R3020
10K
MICOM_MHL
R3021
10K
MICOM_NON_MHL
R3016
10K
MICOM_GED
R3017
10K
MICOM_NON_GED
C3001
0.47uF
LOGO_LIGHT
LOGO_LIGHT
SI1012CR-T1-GE3
Q3001-*1
HDMI_CEC_FET_VISHAY
S
D
G
R3005-*2
22K
MICOM_OLED_FRC
R3005-*1
56K
MICOM_OLED_MAIN
LED_R
WOL/WOW_POWER_ON
R3014
1K
+3.5V_ST
R3011
10K
MICOM_DEBUG
P3000
12507WS-04L
MICOM_DEBUG
1
2
3
4
5
MICOM_DEBUG
MICOM_RESET
SCART_MUTE
IC3000
R5F100GEAFB#30
MICOM
1
P60/SCLA0
2
P61/SDAA0
3
P62
4
P63
5
P31/TI03/TO03/INTP4
6
P75/KR5/INTP9/SCK01/SCL01
7
P74/KR4/INTP8/SI01/SDA01
8
P73/KR3/SO01
9
P72/KR2/SO21
10
P71/KR1/SI21/SDA21
11
P70/KR0/SCK21/SCL21
12
P30/INTP3/RTC1HZ/SCK11/SCL11
13
P50/INTP1/SI11/SDA11
14
P51/INTP2/SO11
15
P17/TI02/TO02
16
P16/TI01/TO01/INTP5
17
P15/PCLBUZ1/SCK20/SCL20
18
P14/RXD2/SI20/SDA20
19
P13/TXD2/SO20
20
P12/SO00/TXD0/TOOLTXD
21
P11/SI00/RXD0/TOOLRXD/SDA00
22
P10/SCK00/SCL00
23
P146
24
P147/ANI18
25
P27/ANI7
26
P26/ANI6
27
P25/ANI5
28
P24/ANI4
29
P23/ANI3
30
P22/ANI2
31
P21/ANI1/AVREFM
32
P20/ANI0/AVREFP
33
P130
34
P01/TO00/RXD1
35
P00/TI00/TXD1
36
P140/PCLBUZ0/INTP6
37
P120/ANI19
38
P41/TI07/TO07
39
P40/TOOL0
40
RESET
41
P124/XT2/EXCLKS
42
P123/XT1
43
P137/INTP0
44
P122/X2/EXCLK
45
P121/X1
46
REGC
47
VSS
48
VDD
+3.5V_ST
R3002
3.3K
EYE_Q_10P
EYE_SCL
EYE_SDA
R3001
3.3K
EYE_Q_10P
MICOM
30
For Debug
PDP
LOGO_LIGHT
Renesas MICOM
NON LOGO_LIGHT
/ OLED
MICOM MODEL OPTION
MODEL_OPT_3
LCD
For CEC
IR Wafer
10Pin
MODEL_OPT_4
12/15Pin
IR Wafer
1
0
MODEL_OPT_0
MODEL_OPT_1
MODEL_OPT_2
JAPAN
NON JAPAN
TOUCH_KEY
TACT_KEY
GP4 High/MID Power SEQUENCE
POWER_ON/OFF!
POWER_ON/OFF2_1
POWER_ON/OFF2_2
POWER_ON/OFF2_3
POWER_ON/OFF2_4
SOC_RESET
HDMI_WAUP:HDMI_INIT
2011.12.12
For LM86
(GP3_Soft touch)
NON_MHL
MHL
MODEL_OPT_5
NON_GED
GED
MODEL_OPT_6
For JAPAN
GP4_HIGH
(GP4_TOOL)
For Sample Set
MICOM MODEL OPTION
Eye Sensor Option
MODEL_OPT_2
1
0
MC8101_ABOV
N/A
MODEL_OPT_4
0
1
CM3231_CAPELLA
CM3231_CAPELLA
(TACT_KEY)
(GP3 Soft touch)
(GP4 Soft touch)
Don’t remove R3014,
not making float P40
not making float P40
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