E Gnd Gnd; D3.3V_Bcm 0V 3.41V; Bcm_Reset 0V 3.4V; +1.8V_Ntp Regulator - LG 32LG40 Training Manual

CIRCUIT DeSCRIPTIONS
IC401 IC401 BCM RESET BCM RESET
PIN PIN FUNCTION FUNCTION
3
14 14
1 1 On/Off Control On/Off Control
6 6
2
IC801 IC801

+1.8V_NTP REGULATOR

+1.8V_NTP REGULATOR
PIN PIN FUNCTION FUNCTION
1 1
2 2
L
3 3
IC805 IC805

D1.2V/A1.2V BCM REGULATOR

D1.2V/A1.2V BCM REGULATOR
G PIN PIN FUNCTION FUNCTION
6,7,8,10 6,7,8,10
17 17 On/Off Control On/Off Control
1,2,3,4,5 1,2,3,4,5
4
13, 14,15,16 13, 14,15,16
11,12,18, 11,12,18,
19,20 19,20
0
Screen Print for Pin No is incorrect, use IC Screen Print for Pin No is incorrect, use IC
MAIN BOARD X400 AND X200 ChECk
X400 Location
MAIN
PWB
Main PWB
X200 Location
24 24
Fall 2008 LCD Training Fall 2008 LCD Training
NAME NAME
IN IN D3.3V_BCM D3.3V_BCM
Reset from IC400 Reset from IC400
OUT OUT BCM_RESET BCM_RESET
NAME NAME
Gnd Gnd Gnd Gnd
OUT OUT '+1.8V_NTP '+1.8V_NTP
IN IN 3.3V_TMDS_SW 3.3V_TMDS_SW
NAME NAME
IN IN +5V_SUB +5V_SUB
Power_CTL_1.2V Power_CTL_1.2V
OUT OUT D1.2V_BCM D1.2V_BCM
n/c n/c n/c n/c
Gnd Gnd Gnd Gnd
1.48V
1.49V
Main PWB
IC808 IC808 ST-BY 3.3V DC-DC CONVERTER ST-BY 3.3V DC-DC CONVERTER
STBY STBY RUN RUN PIN PIN FUNCTION FUNCTION
0V 0V 3.41V 3.41V 2 2
0V 0V 3.4V 3.4V 3 3 OUT OUT
0V 0V 3.4V 3.4V 4 4 Gnd Gnd
Q900 Q900 LVDS 12V SWITCH CONTROLLER Q901 LVDS 12V SWITCH CONTROLLER Q901
STBY STBY RUN RUN PIN PIN FUNCTION FUNCTION
Gnd Gnd Gnd Gnd B B Control Control
0V 0V 1.8V 1.8V C C Pull Down 12V Pull Down 12V
0.26V 0.26V 3.29V 3.29V E E Gnd Gnd
Q901 Q901

LVDS 12V SWITCH

LVDS 12V SWITCH
STBY STBY RUN RUN PIN PIN FUNCTION FUNCTION
0.38V 0.38V 5V 5V 1,3 1,3
0V 0V 3.41V 3.41V 2,4 2,4 On/Off Control On/Off Control
0V 0V 1.29V 1.29V 5,6,7,8 5,6,7,8 OUT OUT
0V 0V 0V 0V
Gnd Gnd Gnd Gnd
X400 X400
2.4Vp/p 2.4Vp/p
24Mhz 24Mhz
With set on or off With set on or off
NAME NAME
IN IN ST_5V ST_5V
3.3VST_MICON 3.3VST_MICON
Gnd Gnd
NAME NAME
LVDS_PANEL_CTRL LVDS_PANEL_CTRL
LVDS Switch Control LVDS Switch Control
Gnd Gnd
NAME NAME
IN IN 12V 12V
Q900 Q900
LVDS 12V LVDS 12V
X200 X200
660mVp/p 660mVp/p
54Mhz 54Mhz
Only when set is on Only when set is on
Use Crystal Side R232 or R233
STBY STBY RUN RUN
5V 5V 5V 5V
3.43V 3.43V 3.43V 3.43V
Gnd Gnd Gnd Gnd
STBY STBY RUN RUN
0V 0V 0.75V 0.75V
0V 0V 0V 0V
0V 0V 0V 0V
STBY STBY RUN RUN
0V 0V 12.36V 12.36V
0V 0V 6.16V 6.16V
0V 0V 12.36V 12.36V