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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
X
TAL
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)
C
N3
C
N1
T1
U1
OZ9936G
Q
6
AP9971G
CN850
AC Socket
AC Line-in
filter
I850
817B
OVP
.
.
.
2
1
4
6
9
11
12
8
Q850
AP2761
SNUBBER
U850
SG6841
D854
1
2
3
-
+
3
1
2
4
AC 90V-240V
Input
Charge
pump
Curren
t
sense
C
N
2
C
N4
Q
7
AP9971G
T2
DC-DC
16V-12V
CN853
Audio
DC-DC
1 6 V-5 V
CN401
Digital
Video Input
U302
24C02
USB Hub
P901
U901
SMSC
P001, P002
P902
PC Hub
Input
Device
U403
24C16
X
TAL
24MHz
Summary of Contents for 1907FPf
Page 1: ...Service Manual 0 Service Manual LCD Monitor 1907FPf ...
Page 55: ...Service Manual 54 ...
Page 56: ...Service Manual 55 Attachment 2 Schematic ...
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Page 71: ...Service Manual 70 Attachment 3 PCB Layout Interface Board ...
Page 72: ...Service Manual 71 ...
Page 73: ...Service Manual 72 Power Inverter Board ...
Page 74: ...Service Manual 73 Keypad Board ...
Page 75: ...Service Manual 74 ...
Page 76: ...Service Manual 75 USB Control Board ...
Page 77: ...Service Manual 76 Inverter Control Board ...
Page 78: ...Service Manual 77 Power Control Board ...
Page 79: ...Service Manual 78 ...
Page 80: ...Service Manual 79 ...