Read LG 42LB7DF (CHASSIS:LJ81A) Service Manual online
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Power-on
Reset
Not Gate
BCM7412
Active Low
Active High
BCM3553
Active Low
Flash
Tuner
PLD
Reset Design
54M
Crystal
BCM3553
33MHz
BCM7412
Main Clock
27MHz Clock is Recovered From The STC Values
BCM3553
BCM7412
VCXO 27M
Clock Design
BCM3553
3.3V
CH 0
NIM TUNER
(0xC2, 0x30)
5V
Audio
Switch
(0x9A)
CH 1
3.3V
HDCP Key
EEPROM
(0xA8)
CH 2
3.3V
Micom
(0x50)
CH 3
NVRAM
(0xA6)
Audio
AMP
(0x54)
I2C Design
BLOCK DIAGRAM
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