Dell 320-7459 - S1909WXF - 19" LCD Monitor, Service Manual

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Service Manual
2
Table of Contents
CHAPTER 1- PRECAUTIONS & SAFETY NOTICES ...........................................................................................................3
1. SAFETY PRECAUTIONS......................................................................................................................................3
2. PRODUCT SAFETY NOTICE................................................................................................................................3
3. SERVICE NOTES..................................................................................................................................................3
CHAPTER 2- SERVICE TOOLS & EQUIPMENT REQUIRED ..............................................................................................4
CHAPTER 3- CIRCUIT THEORY...........................................................................................................................................5
1. B
LOCK
D
IAGRAM
......................................................................................................................................................5
2. E
LECTRONIC
C
IRCUIT
T
HEORY
.................................................................................................................................7
3. FACTORY PRESET TIMING TABLE ...................................................................................................................13
4. P
OWER
O
N
/O
FF
S
EQUENCY
...................................................................................................................................13
5. D-SUB C
ONNECTOR
P
IN
A
SSIGNMENT
...................................................................................................................14
6. AC O
UTLET
P
IN
A
SSIGNMENT
.................................................................................................................................14
7. I
NNER
C
ONNECTOR
P
IN
A
SSIGNMENT
.....................................................................................................................14
8. K
EY
P
ARTS
P
IN
A
SSIGNMENTS
................................................................................................................................16
CHAPTER 4- DISASSEMBLY & ASSEMBLY .....................................................................................................................21
1. E
XPLODED
D
IAGRAM
..............................................................................................................................................21
2. S1909WFP
F
D
ISASSEMBLY
B
LOCK
........................................................................................................................22
3. A
SSEMBLY
B
LOCK
..................................................................................................................................................23
CHAPTER 5- TEST AND ADJUSTMENT............................................................................................................................24
1. F
UNCTION KEY
D
EFINITIONS
...................................................................................................................................24
2. OSD C
ONTROL
.....................................................................................................................................................24
3. F
ACTORY
M
ODE
I
NTRODUCTION
..............................................................................................................................26
4. B
URN
-
IN PATTERN
..................................................................................................................................................27
5. A
UTO
C
OLOR
B
ALANCE
(A
UTOMATICALLY CALIBRATE CHIP
ADC
PARAMETER BY USING CHIP INTERNAL
DAC.) ............27
6. U
PLOAD FIRMWARE TO
MCU
VIA
VGA C
ABLE
..........................................................................................................26
7. A
FTER REPAIR
,
TO ENSURE THE QUALITY YOU SHOULD DO THE FOLLOWING TEST AND ADJUSTMENT
.............................27
CHAPTER 6- TROUBLE SHOOTING..................................................................................................................................30
1. C
OMMON
A
CKNOWLEDGE
.......................................................................................................................................30
2. N
O
P
OWER
LED O
FF
.............................................................................................................................................30
3. P
OWER NORMAL
LED A
MBER
.................................................................................................................................31
4. B
ACKLIGHT CAN
’
T BE TURNED ON
............................................................................................................................32
5. N
O PICTURE
B
ACKLIGHT ON
..................................................................................................................................33
6. A
T
32-
GRAY SCALE PATTERN
,
COLOR LOST IN SOME SCALE
.......................................................................................34
CHAPTER 7- RECOMMENDED PART LIST.......................................................................................................................35
ATTACHMENT 1- BILL OF MATERIAL ...............................................................................................................................37
ATTACHMENT 2- SCHEMATIC ...........................................................................................................................................47
ATTACHMENT 3- PCB LAYOUT .........................................................................................................................................52