Dell 1907FPf - Chapter 3- Circuit Theory; Block Diagram

Service Manual
5
Chapter 3- CIRCUIT THEORY
1. Block Diagram
There are 4 pieces PCBA in monitor, one is power/inverter board which is single layer board, one is
Interface board with USB HUB (1up/2down) which is two layers board, one is keypad board, one is USB
transfer board located on side of monitor.
Backlight ON-OFF/Brightness CTRL
+5V
+16V
5V
+16V
T850
R. G. B. H. V
D850
DDC_CLK
DDC_DATA
Power 5V
for Panel
U401
Gm5621-LF
XTAL
14.318MHz
U402
Serial flash
ESD
Protection
CN301
D
-
SUB
Analog
Video Input
U301
24C02
DC
-
DC
5V-3.3V
3.3V-1.8V
CN501
CN302
DVI
Function Key
Board
TFT LCD Panel
17
M170EG01 (AUO)
LM170E01-TLB3/B4 (LPL)
CN3
CN1
T1
U1
OZ9936G
Q
6
AP9971G
CN850
AC Socket
AC Line
-
in
filter
I
85
0
817B
OVP
.
.
.
2
1
4
6
9
11
12
8
Q850
AP2761
SNUBBER
U
850
SG6841
D854
1
2
3
-+
3
1
2
4
AC
90V
-
240V
Input
Charge
pump
Current
sense
CN2
CN4
Q
7
AP9971G
T2
DC
-
DC
16V-12V
CN853
Audio
DC
-
DC
16V-5V
CN401
Digital
Video Input
U302
24C02
USB Hub
P901
U901
SMSC
P001, P002
P902
PC Hub
Input
Device
U403
24C16
XTAL
24MHz