NEC MultiSync LCD2080UX -BKA Service Manual page 437

BLOCK DIAGRAM Model LCD2080UX
TMDS Receiver
TFP401
CNA01
DVI-I Connector
TMDS Signal
RGB Video
H/V Sync
DVI selection
HOT
Manual Auto
DDC (SCL/SDA)
IC8A4,5
DDC 5V
SN74CBT
1G125
BANKSEL
IC8A3
Potentiometer IC8A1
X9116
128Kx2Banks
EEPROM
BU9882
CS, U/D, INC
from IC804
IC8F1
128Kx2Banks
EEPROM
BU9882
IC8A2
Potentiometer
X9116
CNA02
SCL1 / SDA1
From Q861,863
Dsub Connector
DDC (SCL/SDA)
DDC 5V
RGB Video
H/V Sync
CNA03
DVI-D Connector
DDC (SCL/SDA)
DDC 5V
TMDS Signal
ICK01
RGB 48bit
to IC4A1
DDE,DCK
to IC4A1
Input Select
from IC801
Delay Correct
Q7N1, 7N2
Sync Sepa
For PMS Detect
QAH1, AH2
Sync Sepa
For Mode Detect
DVI
ICAA1,2 ICAA3,4
Hsync
Sync Switch
Schmitt Inv.
(with Vth Select)
DVI Vsync IC4A2,3
Dsub Vsync Schmitt Inv.
(w/o Vth Select)
ICK02
TMDS Receiver
TFP401
3.3V
Device
SCL0 / SDA0
ICA01
to IC804
AD Converter
TRITON2
AD9888-170
UPD65545-Y-6C
-ADC
-Color Management
-PLL
-Mode Detect
-CLAMP pulse
RGB INPUT1
SOGIN1
RGB 48bit, CLK
RGB INPUT2
SOGIN2
Hs-out
PLLHD(AH)
Vs-out
Hs1/Vs1
CLP
CLAMP
Hs2/Vs2
HOLD
PSYNC
SOGOUT
SOGDET2
ICAA4
SOGDET1
Sync
Selector2
H/V Sync DVI
H/V Sync Dsub
PMS
From IC804
Wired OR
DDE,DCK
DDE
from ICK01
RGB 48bit
RGB 48bit
from ICK01
SCL1 / SDA1
to IC8A1,8F1
9-1
2.5 & 3.3V 5.0V
Device Device
OSC4A1
IC4A1
55MHz
spread spectrum
125/130MHz
IC401
Scaler
PW164B
-Scaling
-OSD
GFBK
GHS
GREF
UART
IC402
Flash ROM
LHF28F800
4 Line Serial
SCL0 / SDA0
to ICA01
IC804
Sync Detect Signal
MPU
M30625FGNGP
Q861, 863
FET Switch
IC802
18V Drop
Detect
M51957FP
Input Select
to ICK01
Input1 Digital
Input1 Analog
Input2 Digital
Input2 Analog
IC403
ICS332
OSC401
14.31818 MHz
clock
IC551 - 552
LCD
Panel
LVDS
DS90C385MTDX
IC803
EEPROM
CAT24WC64
OSC801
7.37MHz
IC801
Sys-Reset
M51957FP
CN101
User Control
CN2A1
Back Light
Control