Service Manual
5
Chapter 3- CIRCUIT THEORY
1.Block Diagram
Dell ST2010 consists of a main body and a stand (base). The main body contains a
LCD module with 2 CCFL lamps, There are 4pcs PCBA in this monitor, one is
power& inverter which is a single layer board, one is interface board, one is
function keypad which is OSD control located on the right side back cover,one is
power DC_on/off key. The block diagram is shown as below
(fig.1
)
.
Lamp2
Photocoupler
Transformer
Snubber
&Schottky
Feedback
Control
Snubber
&Schottky
1
T
o
P
a
n
e
l
C
C
F
L
MOSFET
Rectifier&
Filter
Circuit
Brightness/ ON/OF
Control
Power
MOSFET
AC Input
90V~264V
PWM Control
IC LD7575
Feedback
and OVP
+13V DC output
Power
Transformer
Lamp1
AC Line Filter
INL816
Fuse 5A/125V
+5V DC output
+5V DC output
Summary of Contents for ST2010 - 20" LCD Monitor
Page 1: ...Service Manual 0 Service Manual LCD Monitor ST2010 ...
Page 20: ...Service Manual 19 ...
Page 21: ...Service Manual 20 8 Key Parts Pin Assignments 8 1 U105 TSUMU58EDJ LF ...
Page 22: ...Service Manual 21 ...
Page 23: ...Service Manual 22 ...
Page 24: ...Service Manual 23 ...
Page 27: ...Service Manual 26 Chapter 4 Disassembly Assembly 1 Exploded Diagram ...
Page 30: ...Service Manual 29 3 ST2010 Assembly Block ...
Page 32: ...Service Manual 31 ...
Page 60: ...Service Manual 59 Attachment 2 Schematic 1 Interface board schematic ...
Page 68: ...Service Manual 67 power board schematic 1 ...
Page 69: ...Service Manual 68 ...
Page 70: ...Service Manual 69 ...
Page 72: ...Service Manual 71 Attachment 3 PCB Layout Power inverter board Top Layer ...
Page 73: ...Service Manual 72 Bottom Layer ...
Page 74: ...Service Manual 73 I F board Top Layer Bottom Layer ...
Page 75: ...Service Manual 74 Keypad ...
Page 76: ...Service Manual 75 ...