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

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
Q850
AP2761
U850
SG6841
4

Chapter 3- CIRCUIT THEORY

TFT LCD Panel 17
M170EG01 (AUO)
LM170E01-TLB3/B4 (LPL)
SNUBBER
D854
.
4
6
8
+16V
9
11
.
12
1
1
2
2
.
3
T850
OVP
I850
1
817B
D850
DC-DC
AC Line-in
16V-12V
filter
CN850
AC Socket
CN853
AC 90V-240V
Audio
Input
DC-DC
5V
5V-3.3V
3.3V-1.8V
DC-DC
16V-5 V
U402
Serial flash
U301
24C02
U302
24C02
CN302
DVI
Digital
Function Key
Video Input
Board
5
Service Manual
CN501
Power 5V
for Panel
U401
Gm5621-LF
R. G. B. H. V
ESD
Protection
DDC_CLK
DDC_DATA
CN301 USB Hub
D-SUB P901
Analog PC Hub
Video Input
Input
U403
24C16
U901
SMSC
P902
Device