|
|
Teilenummer | 2209WA |
|
Beschreibung | LCD Monitor Service Manual | |
Hersteller | DELL | |
Logo | ||
Gesamt 30 Seiten Service Manual
Service Manual
LCD Monitor 2209WA
-0-
Service Manual
Chapter 3- CIRCUIT THEORY
Block Diagram
Dell 2209WA consists of a main body and a stand (base). The main body
contains a Innolux LCD module with 6 CCFL lamps, There are 4pcs PCBA
in this monitor, one is power & interface & Audio board , one is invert board ,
one is keypad which is OSD control, and one is USB stretch board located
on the right side back cover.. The block diagram is shown as below.
(fig.1)
POWER
PFC
control
PFC+PWM
controller
IC SG6901
Feedback
PWM
control
PFC boost
circuit
Rectifier&
Filter
Circuit
AC Line Filter
Bulk
E-CAP
Main Power
PWM circuit
Start up
circuit
Standby
controller
IC LD7575
PWM
control
Standby
Power PWM
circuit
AC Input
90V~264V
Feedback
control
Transfor and
Isolate
(Main Power
transformer)
Transfor and
Isolate
(Standby Power
transformer)
Feedback
control
24V ON/OFF
circuit
To Inverter
+24V DC output
to Inverter
Rectifier and
filter circuit
12V DC
regulator and
ON/OFF circuit
24V ON/OFF Contro
CCFL ON/OFF Cont
Brightness Control
AUDIO ON/OFF Con
+12V DC output
Rectifier and
filter circuit
+24V /+12V/+5V
OVP circuit
+5V DC output
+5V DC output
GND
DC Jack
AUDIO Detect
Power saving
circuit
(OPTION)
Power Saving contr
Contol Signal
From/TO IF Board
5
6 Page Service Manual
down to 0 voltage. IC shutdown process is triggered
2.2 Power PWM circuit
2.2.1) Block diagram:(fig.4)
11
12 Page | ||
Seiten | Gesamt 30 Seiten | |
PDF Download | [ 2209WA Schematic.PDF ] |
Teilenummer | Beschreibung | Hersteller |
2209WA | LCD Monitor Service Manual | DELL |
Teilenummer | Beschreibung | Hersteller |
CD40175BC | Hex D-Type Flip-Flop / Quad D-Type Flip-Flop. |
Fairchild Semiconductor |
KTD1146 | EPITAXIAL PLANAR NPN TRANSISTOR. |
KEC |
www.Datenblatt-PDF.com | 2020 | Kontakt | Suche |