Dell 1907FPf Service manual

Service Manual

LCD Monitor 1907FPf

Service Manual Versions and Revision

No. Version Release Date Revision

1.0

2006/6/03

Initial Release

This manual may not, in whole or in part, be copied, Photocopied, reproduced, translated, or converted to any electronic or machine readable form without prior written permission of Foxconn Tech. Corp. Ltd.

Dell 1907FFPf Service Manual

Service Manual

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. BLOCK DIAGRAM.......................................................................................................................................................................................5

2. ELECTRONIC CIRCUIT THEORY.................................................................................................................................................................6

3. FACTORY PRESET TIMING TABLE..................................................................................................................................................8

4. POWER ON/OFF SEQUENCY......................................................................................................................................................................9

5. D-SUB CONNECTOR PIN ASSIGNMENT................................................................................................................................................... 7

6. AC OUTLET PIN ASSIGNMENT................................................................................................................................................................10

7. INNER CONNECTOR PIN ASSIGNMENT...................................................................................................................................................11

8. KEY P ARTS PIN ASSIGNMENTS................................................................................................................................................................13

CHAPTER 4- DISASSEMBLY & ASSEMBLY .................................................................................................................................................19

1. EXPLODED DIAGRAM...............................................................................................................................................................................19

2. 1707FPF DISASSEMBLY BLOCK..............................................................................................................................................................20

3. ASSEMBLY BLOCK....................................................................................................................................................................................21

CHAPTER 5- TEST AND ADJUSTMENT.........................................................................................................................................................21

1. FUNCTION KEY DEFINITIONS..................................................................................................................................................................22

2. OSD CONTROL ..................................................................................................................................................錯誤! 尚未定義書籤。

3. F ACTORY MODE INTRODUCTION............................................................................................................................................................22

4. BURN-IN PATTERN.....................................................................................................................................................................................23

5. AUTO COLOR BALANCE (AUTOMATICALLY CALIBRATE CHIP ADC PARAMETER BY USING CHIP INTERNAL DAC.) ..................23

6. EDID (REWRITE EDID DATA TO EEPROM)........................................................................................................................................23

7. UPLOAD FIRMWARE VIA VGA CABLE....................................................................................................................................................30

8. AFTER REPAIR, TO ENSURE THE QUALITY YOU SHOULD DO THE FOLLOWING TEST AND ADJUSTMENT.........................................32

CHAPTER 6- TROUBLE SHOOTING ...............................................................................................................................................................35

1. COMMON ACKNOWLEDGE................................................................................................................................錯誤! 尚未定義書籤。

2. NO POWER & POWER LED OFF .............................................................................................................................................................35

3. POWER LED AMBER................................................................................................................................................................................38

4. BACKLIGHT CAN ’T BE TURNED ON......................................................................................................................................................... 39

5. NO PICTURE & BACKLIGHT ON...............................................................................................................................................................40

6. A T 32-GRAY SCALE PATTERN, COLOR LOST IN SOME SCALE................................................................................................................ 41

ATTACHMENT 1- BILL OF MATERIAL...................................................................................................................錯誤! 尚未定義書籤。

ATTACHMENT 2- SCHEMATIC .........................................................................................................................................................................55

ATTACHMENT 3- PCB LAYOUT........................................................................................................................................................................70

Service Manual

Chapter 1- PRECAUT IONS & SAFETY NOTICES

SAFETY PRECAUTIONS

This monitor is manufactured and tested on a ground principle that a user ’s safety comes first. However, improper used or installation may cause damage to the monitor as well as to the user.

WARNINGS:

l This monitor should be operated only at the correct power sources indicated on the rating label on

the rear cover of the monitor. If you’re unsure the power supply in your residence, consult your local dealer or Power Company.

l Use only the specified power cord that comes with this monitor. l Do not try to repair the monitor by yourself, as it contains no user-serviceable parts. This monitor

should only be repaired by a qualified technician.

l Do not remove the monitor cabinet. There is high-voltage parts inside that may cause electric shock

to human bodies.

l Stop using the monitor if the cabinet is damaged. Have it checked by a service technician. l Put your monitor only in a lean, cool, dry environment. If it gets wet, unplug the power cable

immediately and consult your closed dealer.

l Always unplug the monitor before cleaning it. Clean the cabinet with a clean, dry cloth. Apply

non-ammonia based cleaner onto the cloth, not directly onto the class screen.

l Do not place heavy objects on the monitor or power cord.

PRODUCT SAFETY NO TICE

Many electrical and mechanical parts in this chassis have special safety visual inspections and the protection afforded by them cannot necessarily be obtained by using replacement components rated for higher voltage, wattage, etc. Before replacing any of these components read the parts list in this manual carefully. The use of substitute replacement parts, which do not have the same safety characteristics as specified in the parts list, may create shock, fire, or other hazards.

SERVICE NOTES

l When repla cing parts on circuit boards, clamp the solder wires around terminals before soldering. l Keep wires away from high voltage, high temperature components and sharp edges. l Keep wires in their original position so as to reduce interference. l Adjustment of this product please refers to the user ’ manual. l Use Pb free solder wire for circuit board preparation.

Service Manual

Chapter 2- SERVICE TOOLS & EQUIPMENT REQUIRED

1. SIGNAL GENERATOR

2. MULTIMETER

3. SCREW DRIVER

4. OSCILLOSCOPE

5. Soldering IRON

6. SOLDER (Lead free, RoHS compliance)

7. Color Analyzer

8. Fox_VISP_Programmer

9. Fox_VEDID_Programmer

Service Manual

Power 5V

U402

ESD

Protection

CN301

D-SUB

Analog

Video Input

U301

24C02

DC-DC

CN501

CN302

Function Key

TFT LCD Panel

U1 Q6

CN850

AC Line

filter

I850

OVP

Q850

850

D854

AC 90V-240V

Charge Q

DC-DC

Audio

DC-DC

Digital

Video Input

U302

24C02

USB Hub

P901

U901

SMSC

P902

PC Hub

U403

24C16

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

CN3

+5V +16V

CN4

AP9971G

+16V

AP2761

OZ9936G

AP9971G

SG6841

SNUBBER

pump

Current

sense

R. G. B. H. V

CN2

DDC_CLK

CN1

DDC_DATA

D850

M170EG01 (AUO) LM170E01-TLB3/B4 (LPL)

8 9

T850

817B

16V-12V

16V- 5V

CN401

5V-3.3V

3.3V-1.8V

S erial flash

for Panel

U401

Gm5621-LF

24MHz

XTAL

14.318MHz XTAL

P001, P002

AC Socket

CN853

DVI

Input

Board

Input

Device

Service Manual

2. Electronic Circuit Theory

2.1Switching Mode Power Supply

2.1.1 AC Current Input Circuit CN850 is a connector for connecting Ac Power. F850 is a fuse to protect all the circuit Ac. Input

voltage is fro m 90v to 264V. R850 and R851 in serial to prevent man from shock. L851 is used to clear up low frequency wave. C850 and C851 are used to discharge the waves that L851 produced. High frequency waves are damped by C852 and C853. D850 is a rectifier in which there are 4 build-in diodes, inverting AC to DC.

2.1.2 High Voltage to Low Voltage Control Circuit

C854 is used to smooth the wave from rectifier. R852 is a fuse to protect the following circuit when current flow is too large. U850 is a highly integrated PWM controller. Typical start-up current for U850 is only 30 uA, R853 and R854 are serial circuit to limit current flow. When current flow through R853 and R854 gets to Pin 3 of U850, with VDD hold-up capacitor C857, U850 is enough for starting up.

When U8 50 begins to work Pin 8 of U850 will output about 18v to drive Q850,and then the main current flow get to GND bypassing through T850, Q850. Because of the change of current flow, wires in the other side of T850 will induct current.At the same time, the current inducted by wires which connected T850 Pin 1 and Pin 2, with components of D852, R855, C857 and C856, will be supplied to U850 for normal operating.

When the sense voltage across the sense resistor R859, reaches the threshold voltage around 0.85v,

the output GATE drive will be turned off. Every time when the output of power supply is shorted or over loaded, the FB voltage will increase, the build-in PWM output will then be turned off. Both will prevent the power supply from being overheated under over loading condition. The PWM duty cycle is determined by this current sense signal and VFB, the feedback voltage . When the voltage on sense pin reaches Vcomp =(VFB-1.0)/3, A switch cycle will be terminated immediately. Vcomp is internally clamped to a variable voltage around 0. 85 V for output power limit

When Q850 are turned off, the main current flow will be consumed through D851, C880 and

R880. This will prevent Q850 from being damaged under large current impulse and voltage spike.

2.1.3 DC_12V Output Circuit

D854 is used to rectify the inducted current. R860 and C861 are used to store energy when current is

reversed. The parts including C862, C864, C863 and L853 are used to smooth the current waves that are from D854, and then 12-v voltage is supplied

12-v supply voltage feed back to PWM controller U850 via R863, R868, and I850,I851.

2.1.4 Protect Circuit of U850

When Vdd or 12V output come out of SPEC , the voltage on D856 will be rised over 22 volts, the current via D856 is large enough to star up protect circuit internal U850, U850 will be in Auto Restart mode until the matter is got rid of .

2.2 Inverter Circuit

2.2.1 Low voltage to High voltage circuit

DC_5V through R2 will provide power for U1 on the pin6. EN -ON/OFF voltage signal coming from gm2621-LF which is on IF BD will enable Q1 and Q2 to work. R5 and R30 are used to limit current. C5 is used to dump noise, C6 is used to soft start, and then the voltage on pin 1 will enable U1. The operating frequency is determined by the external resistor (R4) connected to Pin 2.

During start up, VSEN -DIM (pin7) senses the voltage on the transformer secondary. When VSEN reaches 3V, the output voltage is regulated. If no current is sensed approximately 2 seconds, U1 shuts off. DIM-ADJ duty cycle signal through R3 and C5 is on Pin 7(ISEN), which adjusted will can change the brightness of Panel.

DRV1 and DRV2 of U1 are used to drive Q6 and Q7 . DRV1 and DRV2 are controlled by build-in PWM IC. Q6 and Q7 are switches which has two build-in IGBTs. The working principle of circuit of T1 and T2 , Q6 AND Q7 are the same to circuit of T850 and Q850 described ahead.

Service Manual

The voltage signal on Pin2 of ZD4 sensed through R14 comes to Pin8 of U1, ISEN (Lamp Current Detection & Control). C12 is used to dump noise. Once the CCFLs are ignited and current is sensed through resistor R14 ,capacitor C12 performs the loop compensation function. The voltage at pin 1 controls the drive duty cycle of the power MOSFETs to regulate the CCFL current.

2.2.2 Protection Circuit of U1 If a CCFL is removed, fails or damaged during normal operation, CCFL current is no longer sensed

and the voltage on ISEN pin drops. Once the voltage at the ISEN pin is less than the lamp ” on” threshold, the shutdown timer is activated. The IC maintains the output voltage for approximately 2-3seconds and once the timer expires, the IC will shutdown. To restart the IC, either toggle the ENA_SST_CMP pin or recycle the power on the VDDA pin. The control logic protects the transformer from an abnormally high voltage at the secondary output.T1and T2 output voltage are sensed through Rectifier Diodes Q3.When the voltage at the emitter of Q3 is less than –Vbe DROP,Q3 will conduct and regulate the output voltage to T1 and T2 secondary.

2.3 I/F Board Circuit

2.3.1 RGB CAPTURE

- Signal RED,GREEN,BLUE input through CN301 #1,#2,#3, Stop DC via C303, C302 and C301, and then enter into U401 (gm5621-LF) analog input terminal #99,#96,#93, and then gm5621-LF deals with signal internally. D315, D316, D317 are ESD protector to prevent U401 from ESD.

- Signal DDC_SCL (series clock) inputs via CN301#15, and then passes through ZD304 for ESD protection, goes into EDID EEPROM IC U301 #6.

- Signal DDC_SDA (series data) inputs via CN301#12, and then passes through ZD306 for ESD protection, goes into EDID EEPROM IC U301 #5.

- Signal TTL vertical sync. (Vsync) inputs via CN301 #14, and then clamped by ZD302 Zener, passes through R311, and then goes into IC U401 (gm5621-LF) #90.

- Signal TTL horizontal sync. (Hsync) inputs via CN301 #13, and then clamp ed by ZD301 Zener, passes through R310, and then goes into IC U401 (gm5621-LF) #89.

- CN301#5 is defined as cable detect pin, this detector realize via R337 and U401#114, and ZD306 is

ESD protector.

- U301 +5V is supplied by PC via CN301#9 with D3 28 and ZD303 for ESD protection, or supplied by Monitor self via D304.

- U301 is an EEPROM IC which is memory and VGA input EDID data saved in it.

2.3.2 DVI CAPTURE

- Differential Signal input RX0+,RX0-,RX1+,RX1-,RX2+,RX2-,RXC+,RXC- through CN302 #18,#17,#10,#9,#2,#1,#23,#24 via R330,R327,R318,R321,R317,R303,R331,R335 enter into U401 (gm5621) Digital input terminal #80,#81,#75,#76,#72,#73,#83,#84, and then gm5621 deals with signal internally.

- Signal DDC_SCL (series clock) inputs via CN302#6, and then passes through ZD307 Zener for ESD protection, via R328, goes into EDID EEPROM IC U302 #6.

- Signal DDC_SDA (series data) inputs via CN302#7, and then passes through ZD308 Zener for ESD protection, via R329, goes into EDID EEPROM IC U301 #5.

- CN302#15 is defined as cable detect pin, this detector realize passes through R339 ,go into

U401#114, and ZD309 is ESD protector.

- U302 +5V is supplied by PC via CN302#15 through D330, or supplied by Monitor self via D3 29.

- U302 is an EEPROM IC which is memory and DVI input EDID data saved in it.

2.3.3 Buttons Control

- Button “Power” on front bezel connects to U401 (gm5621-LF) #125 through CN401 #1, U401 #125 is defined as power on/off.

- Button “+” on front bezel connects to U401 (gm5621-LF) #115 through CN401 #4 via R431 U401 #115 (LBADC control Pin ) is defined as “UP”.

- Button “-” on front bezel connects to U401 (gm5621-LF) #115 through CN401 #5 via R429

Service Manual

U401 #115 (LBADC control Pin ) is defined as “DOWN”.

- Button “Menu” on front bezel connects to U401 (gm5621-LF) #113 through CN401 #6 via R427, U401 #113 ((LBADC control Pin ) is defined as “Menu”.

Button “Select” on front bezel connects to U401 (gm5621-LF) #113 through CN401 #7 via R428,

U401 #113 (LBADC control Pin ) is defined as “Select”.

- LED Indicator on Front Bezel a. When press button “power”, U401(Scalar) #125 be send in low potential, make U401#51 sends out

high potential through CN401 #3 via R406 to J1#3 on keypad, LED Green on.

b. When in “Suspend” mode, U401 (Scalar) #57 sends out a high potential through CN401 #2 via

R404 to J1#2 on keypad .LED Amber ON.

2.3.4 GENESIS CHIP U401 (gm2621-LF)

- U401 (gm5621-LF) #7~#16. #31~#40 output 8 bit even LVDS digital data to panel control circuit through CN501.

- U401 (gm5621-LF) #127 output PPWR ”H” potential to make Q502 conducted, and then make Q501 conducted, +5V flow to CN501#1~#3 as Panel Vdd .

- U401 (gm5621-LF) #49 output CCFL_ON/OFF ”H” potential to control Inverter on/off.

- U401 (gm5621-LF) #50 outputs Brightness “PWM” signals to control CCFL brightness.

- TCLK by Crystal 14.318MHz input to U401 (gm5621-LF) #109.

- U401 (gm5621-LF) #111 Bidirectional RESET signals

Please refer to gm5621-LF Pin Assignments table in page

2.3.5 Regulator Circuit

-- +5V is from power supply for U301, U302, U601,U902, U904, U905 and Panel used.

- +3.3V is from switching mode power supply for U401,U402, U404,U901,U903

- +1.8V generates from +3.3V through C603 filtering and U602 which is output +1.8V LDO, for U401 used.

2.3.6 USB circuit

- USB Signal input D+,D- through P901,#3,#2, then enter into U901 (SMSC2504) Signal input terminal #2,#3, and then SMSC2504 deals with signal internally.

- U901 (SMSC2504) #5,#6, #8,#9 output DD+[1],DD-[1], DD+[2],DD-[2] USB data through P902 #6,#7,#3,#2 . EP901, EP902,EP905,EP906 are ESD protector

- U901 (SMSC2504) #11,#12, #15,#14 output DD+[3],DD-[3], DD+[4],DD-[4] USB data through CN901 #3,#4, #8,#7 .

- In normal condition,U901(SMSC2504) #45,#43,#39,#37 output low signal to U904 (G556) #1,#4,

U905 (G556) #1,#4, then U904 and U905 #8,#5 output 5v to provide downstream power. When the loading is over current, U904 (G556) #2,#3, U905 (G556) #2,#3 output Active-low signal to U901 #46,#44, #40,#38,then U904,U905 output power will be cut off.

- Xin by Crystal 24MHz input to U901 (SMSC2504) #58.

3. FACTORY PRESET TIMING TABLE

3.1 Analog Standard Resolution Horizontal Frequency

(KHz)

640 x 480 31.469 59.940 640 x 480 37.500 75.000 800 x 600 37.879 60.317

VESA

IBM DOS 720 x 400 31.469 70.087

800 x 600 46.875 75.000 1024 x 768 48.363 60.004 1024 x 768 60.023 75.029 1280x1024 48.483 60.042 1280x1024 60.087 75.034

Vertical Frequency

(Hz)

Service Manual

0V 10%

T1 T2

3.2 Digital Standard Resolution Horizontal Frequency

(KHz)

640 x 480 31.469 59.940

VESA

800 x 600 37.879 60.317 1024 x 768 48.363 60.004 1280x1024 48.483 60.042

Vertical Frequency

(Hz)

4. Power On/Off Sequency

Hardware Power ON When power cord plug into AC socket, Power provides 12V. DC_5V, DC_3.3V generate from DC_12V through LDO U8 51.DC_5V is voltage for panel and USB IC U901, DC_3.3v is main vo ltage for U401. When DC_3.3V input to U401, U401 reset circuit active, set U401 all registers to default,. That means finish hardware power on.

Software Power ON/OFF

When press power key, U401 #125 recieves low pulse, and then (gm5621-LF) U401 will be wake up and send high p uls(at 127,49pin) to on CCFL and switch 5.0v to panel module. And make the VGA cable input signal source display normal on panel.

- If Power ON, U402 #51 (LED_Green) will send out High potential, and then LED green on.

- If Power OFF, U402 #57 (LED_Amber) will send out High potential, and then LED Amber on.

The Panel_Vcc, Backlight_En, CLK/DATA output to panel will follow the following sequency.

Power supply for VDD 90% 90%

10%

T5 T6 T7

Signals Valid data (Digital RGB, HS, VS, DE, CLOCK) 0V

T3 T4 Power supply for back light

T1(ms) T2 (ms) T3 (ms) T4 (ms) T5 (ms) T6 (ms) T7(ms)

SPEC(AU) SPEC(LPL)

0.0~10 0.5~50 >200 >200 0.5~50 0.5~10 >1000

0.5~10

0~50 >200 >200 0.0~50 0.5~10 >1000

Service Manual

CN850

5. D-SUB Connector Pin Assignment

Pin Symbol Pin Symbol Pin Symbol 1 Red 6 Red_GND 11 GND 2 Green 7 Green_GND 12 DDC_SDA 3 Blue 8 Blue_GND 13 Hsync 4 GND 9 PC+5V 14 Vsync 5 Cable Detect 10 GND 15 DDC_SCL

6. AC Outlet Pin Assignment

7. DVI Connector Pin Assignment

1 3

Pin# Symbol Description

1 TX 2 - TMDS Negative differential input, channel 2 2 TX 2 + TMDS Positive differential input, channel 2 3 SHLD 2 / 4 Shield for TMDS channels 2 / 4 4 TX 4 - TMDS Data 4 5 TX 4 + 6 DDC Clk DDC Clock 7 DDC Data DDC Data 8 AVS Analog Vertical Sync

9 TX 1 - TMDS Data 1 10 TX 1 + TMDS Data 1 + 11 SHLD 1 / 3 TMDS Data 1 / 3 Shield 12 TX 3 - TMDS Data 3 13 TX 3 + TMDS Data 3 + 14 +5V +5V Power 15 GND Ground (Return for +5V, Hsync, and V Sync) 16 HPD Hot Plug Detect 17 TX 0 - TMDS Data 0 18 TX 0 + TMDS Data 0 + 19 SHLD 0 / 5 TMDS Data 0 / 5 Shield 20 TX 5 - TMDS Data 5 21 TX 5 + TMDS Data 5 + 22 TX CLK SHLD TMDS Clock Shield 23 TX CLK + TMDS Clock + 24 TX CLK - TMDS Clock -

Pin Symbol

1 Line 2 GND 3 Neutral

TMDS Data 4 +

Service Manual

8. USB Up stream Connector pin assignment (B type)

Pin# Symbol Description

1 VBUSPWR USB Cable detect, PC_+5V

2 DM

3 DP

4 GN Ground

5 SHELL Ground

9. USB Down stream connector pin assignment (A type) P902

Pin# Symbol Description

1 PWR2

2 DD2M

3 DD2P

4 GND

5 PWR1

6 DD1M

7 DD1P

8 GND Groun d

9 SHELL Ground

10. USB Down stream connector pin assignment (A type) P001, P002

Pin# Symbol Description

1 GND

2 DD4P/DD3P

3 DD4M/DD3M

4 PWR4/PWR3

11. Inner Connector Pin Assignment

11.1 CN501 (Connect M/B to Panel, AL2309-A0K0D-P or compatible connector) Pin Symbol Description

1 Panel_Vcc Panel power supply (typ.5.0V) 2 Panel_Vcc Panel power supply (typ. 5.0V) 3 Panel_Vcc Panel power supply (typ. 5.0V) 4 NC 5 NC 6 NC 7 GND_LVDS LVDS Ground 8 RXE3+ LVDS signal of even channel 3(-)

9 RXE3- LVDS signal of even channel 3(+) 10 RXEC+ LVDS signal of even channel clock (+) 11 RXEC- LVDS signal of even channel clock (-) 12 RXE2+ LVDS signal of even channel 2(+) 13 RXE2- LVDS signal of even channel 2(-) 14 GND_LVDS LVDS Ground 15 RXE1+ LVDS signal of even channel 1(+) 16 RXE1- LVDS signal of even channel 1(-) 17 GND_LVDS LVDS Ground 18 RXE0+ LVDS signal of odd channel 0(+) 19 RXE0- LVDS signal of odd channel 0(-) 20 RXO3+ LVDS signal of odd channel 3(+) 21 RXO3- LVDS signal of odd channel 3(-) 22 RXOC+ LVDS signal of even channel clock (+) 23 RXOC- LVDS signal of even channel clock (-)

Service Manual

24 GND_LVDS LVDS Ground 25 RXO2+ LVDS signal of even channel 2(+) 26 RXO2- LVDS signal of even channel 2(-) 27 RXO1+ LVDS signal of even channel 1(+) 28 RXO1- LVDS signal of even channel 1(-) 29 RXO0+ LVDS signal of odd channel 0(+) 30 RXO0- LVDS signal of odd channel 0(-)

11.2 CN1, CN2, CN3, CN4 (Connect to Panel Backlight, SM02B-BHSS-1-TB or compatible connector) Pin Symbol Description

1 HV High voltage for lamp 2 LV Low voltage for lamp

11.3 CN401 (Connect IF to keypad S8B-PH-K or compatible connector) Pin Symbol Description

1 Audio Detect Sound bar detect pin 2 LED Amber LED Green on/off control 3 LED Green LED amber on/off control 4 UP keypad “+” control 5 DOWN Keypad “-” control 6 MENU Keypad “MENU” control 7 Select Input signal Select 8 GND GND

11.4 CN601 (Connect Power/Inverter with IF board) Pin Symbol Description

1 GND GND 2 GND GND 3 GND GND 4 Audio Detect Sound bar detect 5 SUB_DC_ON/OFF +5V on/off control 6 +5V DC_+5V 7 +5V DC_+5V 8 +5V DC_+5V 9 Brightness Brightness control

10 CCFL_ON/OFF CCFL ON/OFF control

11.5 CN901 (Connect I/F with transfer USB Board) & CN102 Pin Symbol Pin Symbol

1 GND 1 GND

2 PWR3 2 PWR4 3 DD3M 3 DD4M 4 DD3P 4 DD4P 5 GND 5 GND 6 GND 6 GND 7 DD4P 7 DD3P 8 DD4M 8 DD3M 9 PWR4 9 PWR3

10 GND

Service Manual

12. Key Parts Pin Assignments

12.1 U401 (gm5621-LF) I/O Legend: P=Power, G=Ground, O=Output, I=Input, A=Analog Pin

1 AVSS_BIAS G Analog ground for LVDS PLL and Bandgap 2 VDD_OUT_33 P Digital 3.3V supply for LVDS output 3 RESERVED O Reserved; Do not connect 4 RESERVED O Reserved; Do not connect 5 RESERVED O Reserved; Do not connect 6 RESERVE D O Reserved; Do not connect 7 E_CH3P_LV O LVDS signal of even channel 3(+) 8 E_CH3N_LV O LVDS signal of even channel 3(-)

9 E_CLKP_LV O LVDS signal of even channel clock (+) 10 E_CLKN_LV O LVDS signal of even channel clock (-) 11 E_CH2P_LV O LVDS signal of even channel 2(+) 12 E_CH2N_LV O LVDS signal of even channel 2(-) 13 E_CH1P_LV O LVDS signal of even channel 1(+) 14 E_CH1N_LV O LVDS signal of even channel 1(-) 15 E_CH0P_LV O LVDS signal of even channel 0(-) 16 E_CH0N_LV O LVDS signal of even channel 0(-) 17 CVDD_18 P Core VDD connect to digital 1.8V 18 CRVSS O Chip digital ground 19 RESERVED O Reserved; Do not connect 20 RESERVED O Reserved; Do not connect 21 RESERVED O Reserved; Do not connect 22 RESERVED O Reserved; Do not connect 23 RESERVED O Reserved; Do not connect 24 RESERVED O Reserved; Do not connect 25 Vdd_out_33 P Digital 3.3V supply for LVDS output 26 VSS_OUT G Digital ground for LVDS output 27 RESERVED O Reserved; Do not connect 28 RESERVED O Reserved; Do not connect 29 RESERVED O Reserved; Do not connect 30 RESERVED O Reserved; Do not connect 31 O_CH3P_LV O LVDS odd channel 3 positive. Reserved for gm5611 and gm2621

33 O_CLKP_LV O LVDS odd channel clock positive. Reserved for gm5611 and

34 O_CLKN_LV O LVDS odd channel clock negative. Reserved for gm5611 and

35 O_CH2P_LV O LVDS odd channel 2 positive. Reserved for gm5611 and gm2621

37 O_CH1P_LV O LVDS odd channel 1 positive. Reserved for gm5611 and gm2621

39 O_CH0P_LV O LVDS odd channel 0 positive. Reserved for gm5611 and gm2621

41 RESERVED O Reserved; Do not connect 42 RESERVED O Reserved; Do not connect 43 RESERVED O Reserved; Do not connect

Symbol I/O

O_CH3N_LV O LVDS odd channel 3 negative. Reserved for gm5611 and

gm2621

O_CH2N_LV O LVDS odd channel 2 negative. Reserved for gm5611 and

gm2621

O_CH1N_LV O LVDS odd channel 1 negative. Reserved for gm5611 and

gm2621

O_CH0N_LV O LVDS odd channel 0 negative. Reserved for gm5611 and

gm2621

Description

Service Manual

44 RESERVED O Reserved; Do not connect 45 RESERVED O Reserved; Do not connect 46 RESERVED O Reserved; Do not connect 47 VDD_OUT_33 P Digital 3.3V supply for LVDS output 48 VSS_OUT G Digital ground for LVDS output 49 PBIAS O Panel backlight enable 50 PWM0/GPO_4 I/O PWM0 output or optional general-purpose output GPO_4.

Also used for bootstrap control 51 GPIO_0 I/O General-purpose output GPO_0. Also used for bootstrap control 52 CRVSS G Chip digital ground 53 RVDD_33V P Digital Output VDD. Connect to digital 3.3V 54 CRVSS G Chip digital ground 55 CVDD_18 P Core VDD connect to digital 1.8V 56 GPIO_1 I/O General-purpose output GPO_1. Also used for bootstrap control 57 GPIO_2 I/O General-purpose output GPO_2. Also used for bootstrap control 58 GPIO_3 I/O General-purpose output GPO_3. Also used for bootstrap control 59 SPI_CSn I/O SPI ROM chip select. Also used for bootstrap control. 60 SPI_CLK I/O SPI ROM Clock output. 61 SPI_DI I/O SPI ROM Data input. Connect this pin to the data output of

Serial FLASH 62 SPI_DO I/O SPI ROM Data input. Connect this pin to the data input of Serial

FLASH 63 RVDD_33V P Chip digital ground 64 DDC_SCL_VGA I DDC2Bi clock for Analog Port 65 DDC_SDA_VGA I/O DDC2Bi clock for Analog Port, internal pull up of 10K ohms 66 DDC_SCL_DVI/

HOST_SCA

67 DDC_SDL_DVI/

HOST_SDA

I DDC2Bi clock for DVI Port or host I2C clock signal for

debugging

I/O DDC2Bi clock for DVI Port or host I2C data signal for

debugging, internal pull up of 10k ohms 68 AVSS_DVI G Analog GND for DVI input. Reserved for gm2621 and gm2621;

Do not connect 69 REXT I External reference resistor.

A 1%, 250? resistor should be connected from this pin to pin 74.

Reserved for gm2621 and gm2621; Do not connect. 70 AVDD_DVI_18 P Analog VDD (1.8V) for DVI input.

Must be bypassed with external capacitor(s) to AVSS_DVI.

Reserved for gm2621 and gm2621; Do not connect. 71 AVSS_DVI G Analog GND for DVI input. Reserved for gm2621 and gm2621;

Do not connect. 72 RX2+ I Do not connect. 73 RX2- I Do not connect. 74 AVDD_DVI_33 P Analog VDD (3.3V) for DVI input. Reserved for gm2 621 and

gm2621; Do not connect. 75 RX1+ I Do not connect. 76 RX1- I Do not connect. 77 AVSS_DVI G Analog GND for DVI input. Reserved for gm2621 and gm2621;

Do not connect. 78 AVDD_DVI_18 P Analog VDD (1.8V) for DVI input.

Must be bypassed with external capacitor(s) to AVSS_DVI.

Reserved for gm2621 and gm2621; Do not connect. 79 AVSS_DVI G Analog GND for DVI input. Reserved for gm2621 and gm2621;

Do not connect. 80 RX0+ I Do not connect.

Service Manual

81 RX0- I Do not connect. 82 AVDD_DVI_33 P Analog VDD (3.3V) for DVI input. Reserved for gm2621 and

gm2621; Do not connect. 83 RXC+ I Do not connect. 84 RXC- I Do not connect. 85 AVSS_DVI G Analog GND for DVI input. Reserved for gm2621 and gm2621;

Do not connect. 86 AVDD_DVI_18 P Analog VDD (1.8V) for DVI input.

Must be bypassed with external capacitor(s) to AVSS_DVI.

Reserved for gm2621 and gm2621; Do not connect. 87 CVDD_18 P Core VDD connect to digital 1.8V 88 CRVSS G Chip digital ground 89 HSYNC I ADC input horizontal sync or composite sync input. 90 VSYNC I ADC input vertical sync 91 RVDD_33V P Digital Output VDD. Connect to digital 3.3V 92 AVDD_ADC_33 I 1.8V for gmZAN3SL core 93 BLUE+ I Positive analog input for Blue channel 94 BLUE- I Negative analog input for Blue channel 95 AVSS_ADC G Analog gr ound for ADC 96 GREEN+ I Positive analog input for Green channel 97 GREEN- I Negative analog input for Green channel 98 AVSS_ADC G Analog ground for ADC 99 RED+ I Positive analog input for Red channel

100 RED- I Negative analog input for Red channel 101 AVDD_ADC_33 P Analog power (3.3V) for ADC. Must be bypassed with capacitor

to AVSS_ADC pin.

102 AVSS_ADC G Analog ground for ADC 103 AVSS_ADC G Analog ground for ADC 104 AVDD_ADC_18 P Analog power (1.8V) for ADC. Must be bypassed with capacitor

to A VSS_ADC pin.

105 VBUFC_RPLL O Reserved; Do not connect 106 VDD_RPLL_18 P Digital 1.8V Power for PLL 107 VSS_RPLL G Ground for PLL 108 XTAL O Connect to 14.3MHz crystal. Should be bypassed with capacitor

to AVDD_RPLL_33.

109 TCLK I Connect to 14.3MHz crystal. Should be bypassed with capacitor

to AVDD_RPLL_33.

110 AVDD_RPLL_33 P Analog power (3.3V) for PLL

111 RESETn I/O Bypass with 0.01uF capacitor GND 112 LBADC_VSS G Ground for general-purpose LBADC 113 LBADC_IN3 I Ground-purpose LBADC input 3. 114 LBADC_IN2 I Ground-purpose LBADC input 2. 115 LBADC_IN1 I Ground-purpose LBADC input 1. 116 LBADC_VDD_33 P 3.3V supply for general-purpose LBADC. 117 CRVSS G Chip digital ground 118 CVDD_18 P Core VDD connect to digital 1.8V 119 PWM0/GPO_5 I/O PWM0 output or optional general-purpose output GPO_5.

Also used for bootstrap control

120 GPIO_8 I/O General-purpose input/output 8 121 GPIO_9 I/O General-purpose input/output 9 122 GPIO_10 I/O General-purpose input/output 10 123 GPIO_11 I/O General-purpose input/output 11 124 GPIO_12 I/O General-purpose input/output 12

Service Manual

125 GPIO_13 I/O General-purpose input/output 13 126 GPIO_14 I/O General-purpose input/output 14 127 PPWR O Panel power enable 128 AVDD_BIAS_33 P Analog 3.3V supply for LVDS PLL and Bandgap

12.2 U402 (Serial Flash) Pin Symbol I/O Description

1 CE# I The device is enabled by a high to low transition on CE#. CE#

must remain low for the duration of any command sequence. 2 SO I/O To transfer commands, addresses, or data serially into the de vice. 3 WP# I/O The write protect (WP#) pin is used to enable/disable BPL bit in

the status register. 4 VSS G Connect ground 5 SI I/O To transfer commands, addresses, or data serially into the device

input are latched on the rising edge of the serial clock. 6 SCK I/O To provide the timing of serial interface.

Commands, addresses, or input data are latched on the rising

edge of the clock input, while output data is shifted out on the

Falling edge of the clock input. 7 HOLD I/O To temporarily stop serial communication with SPI flash

memory without resetting the device. 8 VDD P To provide power supply.

12.3 U901 (USB HUB IC) Pin

1 VDDA33 +3.3V Filtered analog power 2 USBDP0 I/O This pin connect to the upstream USB bus data signal 3 USBDN0 I/O This pin connect to the upstream USB bus data signal 4 VSS Ground 5 USBDN1 I/O This pin connect to the downstream USB peripheral device

6 USBDP1 I/O This pin connect to the downstream USB peripheral device

7 VDDA33 +3.3V Filtered analog power 8 USBDP2 I/O This pin connect to the downstream USB peripheral device

9 USBDN2 I/O This pin connect to the downstream USB peripheral device

10 VSS Ground 11 USBDN3 I/O This pin connect to the downstream USB peripheral device

12 USBDP3 I/O This pin connect to the downstream USB peripheral device

13 VDDA33 +3.3V Filtered analog power 14 USBDP4 I/O This pin connect to the downstream USB peripheral device

15 USBDN4 I/O This pin connect to the downstream USB peripheral device

16 VSS Ground 17 NC Not Connect 18 NC Not Connect 19 AM4/LED-EN I/O Amber indicator LED for port 4. Will be active low when LED

Symbol I/O Description

attached to the HUB ports

support is enabled via EEPROM or SMBus.

Service Manual

20 GR4/PAT_DIS1 I/O Green indicator LED for ports 4 and 3. will be active low when

LED support is enable via EEPROM or SMBus 21 AM3 I/O Amber indicator LED for port 3. signal will be active low. 22 GR3/PRT_DIS0 Green indicator LED for ports 4 and 3. will be active low when

LED support is enable via EEPROM or SMBus 23 PARPWR_POL I/O Port power polarity strapping determination for the active signal

polarity of the [4:1]PRTPWR pins. 24 AM2/MTT_EN I/O Amber indicator LED for port 2. will be active low when LED

support is enable via EEPROM or SMBus 25 GR2/NON_REM1

I/O Green indicator LED for ports 2 and 1. will be active low when

LED support is enable via EEPROM or SMBus. 26 AM1/GANG_EN Amber indicator LED for port 1, Will be active lowwhen LED

support is enabled via EEPROM or SMBus. 27 GR1/NON_REM0

I/O Green indicator LED for ports 2 and 1. will be active low when

LED support is enable via EEPROM or SMBus. 28 VDD33 +3.3V I/O Power 29 VSS Ground 30 VDD18 +1.8V core power 31 TEST0 IPD Used for testing the chip. User must treat as a no -connect or

connect to ground. 32 NC Not connect 33 NC Not connect 34 SDA/SMBDATA IOSD12 Serial data/SMB data signal 35 SCL/SMBCLK IOSD12 Serial clock/SMB clock signal 36 PRTPWR4 O Enables power to USB peripheral devices (downstream) 37 OCS4-N IPU Input from external current monitor indicating an over-current

condition. 38 CFG_SEL0 IOSD12 This multifunction pin is read on the rising edge of RESET_N

negation and will determine the hub configuration. 39 PRTPWR3 O Enables power to USB peripheral devices (downstream) 40 OCS3-N Input from external current monitor indicating an over-current

condition. 41 VSS Ground 42 VDD18 +1.8V core power 43 PRTPWR2 O Enables power to USB peripheral devices (downstream) 44 OCS2-N Input from external current monitor indicating an over-current

condition. 45 PRTPWR1 O Enables power to USB peripheral devices (downstream) 46 OCS1-N Input from external current monitor indicating an over-current

condition. 47 CLKIN_EN I Clock in enable

High=XTAL1 pin configured as CLKIN, and must be driven by

an external CMOS clock. 48 TEST1 IPD Used for testing the chip. User must treat as a no -connect or

connect to ground. 49 RESET_N IS This active low signal is used by the system to reset the chip. The

minimum active low pulse is 1 Us. 50 CFG_SEL1 I This pin is read on the rising edge of RESET_N negation and

will determine the hub configuration method. 51 SELF_PWR I Detects availability of local self-power source.

Low=Self/local power source is NOT available.

High= Self/local power source is available. 52 VBUS_DET I/O Detects state of upstream VBUS power. The SMSC Hub

Service Manual

monitors VBUS_DET to determine when to assert the internal

D+ pull-up resistor. 53 VSS Ground 54 VDD18 +1.8V core power 55 VSS Ground 56 NC Not connected 57 XTAL2 OCLKx 24MHz crystal

This is the other terminal of the crystal, or left unconnected when

an external clock source is used to drive XTAL1/CLKIN. 58 XTAL/CLKIN 24MHz crystal or external clock input. 59 CFG/-SEL2 I This pin is read on the rising edge of RESET_N negation and

will determine the hub configuration method. 60 VDDA18PLL +1.8V Filtered analog power for internal PLL. 61 VDDA33PLL +3.3V Filtered analog power for the internal PLL 62 ATEST/REG_EN AIO This signal is used for testing. The analog section of the chip,

and to enable or disable the internal 1.8v regulator. 63 RBLAS I-R A 12.0kohm (+/-1%) resistor is attached from ground to this pin

to set the transceiver ’s internal bias settings. 64 VSS Ground

12.3 U850 (SG6841, PWM Power Controller)

Pin Symbol I/O Description

1 GND Ground 2 FB I Feedback, the FB pin provides the information of

the regulation. The PWM duty cycle is controlled by

FB 3 VIN I Start-up current input 4 RI I Reference setting, typical voltage 1.3V 5 RT N.C.(not connected) 6 SENSE I Current sense for over current protection 7 VDD I Power supply 8 GATE O PWM output

12.4 U1 (OZ9936G, CCFL Inverter controller IC) Pin Symbol I/O Description

1 SST_CMP I Enable, soft start time and compensation of current

error amplifier 2 CT I Timing capacitor to set operating frequency 3 GNDA Ground 4 DRV2 O N MOSFET Driver output 5 DRV1 O N MOSFET Driver output 6 VDDA I Supply voltage input 7 VSEN_DIM I Voltage sense, input analog signal for PWM driving

control 8 ISEN I Lamp current detection & control

Service Manual

Exploded Diagram

Chapter 4- Disassembly & Assembly

LP1903 Exploded Drawing

LP1903

S-5

2006.04.08

GC Lin

Nick Cheng

S-1

S-4

1514

12 11

S-1

S-6

S-3

RemarkQ't

111

505040202400R

505040202600R

512004000100R

Identification NO.

1506381001100RTAPE,ACE,85x28mm,LE1911

1511501000200RFOAM, FORON, ADHESIVE, L18*W2.5*H1.5mm

11111

use 5 pcs if Samsung panel

use 2 pcs if Samsung panel

6(2)

1(5)

509116610510R

509016304200RScrew,I,Cross,M3*4,Zn-Cc

509146306202R

509476606100R

509016306200R

509000001000RBolt,#4-40*12.5,Ni

DesignationNO.Remark

INSULATOR(for PANEL)

INSULATOR(for CHASSIS)

SPACER,RCM19

LVDS,FFC

PCBA,IF_BOARD Ass'y 19"

PCBA,KEY_PAD

PCBA,PWR_BOARD Ass'y

LCD PANEL 19"(LPL,AUO,Samsung)

Screw,P,Cross,M4*10,Black-NL

Screw,I,Cross,M3*6,Zn-Cc

Screw,B,Cross,W/W(T),M4*6,Zn

Screw,P,Cross,W/WAS(7.8),M3*6,Zn-Cc

501010204810R (TCO 03)

714030004810R (TCO 03)

506102000610R (TCO 03)

111

Q'tIdentification NO.

714030004800R

501010204800R

501030100600R

DELL Badge

1907FP-BEZEL_FRONT

1707FP-BUTTON

ASSY,BEZEL,FRONT,LP1903

NO. Designation

511501000100RFoam (Black) 1

506102000600R

11111111112

502210100300R

501280200200R

501020206400R

714050004800R

501280200210R

501030202320R

701000001100R

KENSINGTON_LOCK

VESA Release Button

1907FP-REAR_VENT(R)

1907FP-REAR_VENT(L)

1907FP-BACK_COVER

ASSY,COVER,BACK,LP1903

ASSY,CHASSIS,LP1903

502020300810R

502020300800R

502090302600R

502040000310R

BRACKET_VESA(R),LE1X13

BRACKET_VESA(L),LE1X13

SHIELD_SLIDE

1907FP-CHASSIS

502040604800R

509112304100R

502080100100R

502040604700R

504010000300R

SCREW,P,CROSS,T.T-3*4,Zn

KEYPAD_SUPPORT

SHIELD_LIGHT

SHIELD_USB

SPRING,Φ0.5*D5*H17

211

714010004800R

Service Manual

1907FPf Disassembly Block

LP1903 DISASSEMBLY BLOCK

foam,poron,adhesive*1

button fuction key*1

front bezel*1

logo plate*1

vent left*1

vent right*1

kensington lock*1

back cover*1

vesa release button*1

fix-plate2*1

(P,cross,T.T-3*4,Zn)*1

FINAL ASSY*1

STAND ASSY*1

FRONT BEZEL ASSY*1

BACK COVER ASSY*1

keypad board*1

keypad support*1

(I,Cross,M3*4,Zn-Cc)*1

usb cover*1

usb board*1

(P,Cross,W/WAS,M3*6,Zn-Cc)*1

light cover*2

panel*1

mylar for panel*1

Tape ACE*3(LPL) or 2(AUO)

(I,Cross,M3*6,Zn-Cc)*4 (LPL,AUO)

(I,Cross,M3*4,Zn-Cc)*4 (Samsung)

power board*1

rubber silicon thermal conduct*2

(P,Cross,W/WAS,M3*6,Zn-Cc)*3 (B,Cross,W/W(T)M4*6,Zn)*1 (I,Cross,M3*6,Zn-Cc)*2

fix-plate2*1

(P,cross,T.T-3*4,Zn)*1

spring*2

slide*1

chassis*1

EMI clip*4

I/F board*1

FFC-CABLE*1 TAPE, ACE*1 (85x28mm)

(P,Cross,W/WAS,M3*6,Zn-Cc)*3 (BOLT,#4-40,NI)*4

RCM 19*1

PANEL ASSY*1

(P,Cross,M4*10,BLACK-NL)*4

mylar for chassis*1

CHASSIS ASSY*1

Service Manual

Assembly Block

LP1903 ASSEMBLY BLOCK

chassis*1

CHASSIS ASSY*1

slide*1

back cover*1

vent right*1

mylar for chassis*1

RCM19*1

I/F board*1

FFC-CABLE*1

TAPE, ACE*1 (85x28mm)

(P,Cross,W/WAS,M3*6,Zn-Cc)*3 (BOLT,#4-40,NI)*4

power board*1

rubber silicon thermal conduct*2

(P,Cross,W/WAS,M3*6,Zn-Cc)*3 (B,Cross,W/W(T)M4*6,Zn)*1 (I,Cross,M3*6,Zn-Cc)*2

panel*1

mylar for panel*1

Tape ACE*3(LPL) or 2(AUO)

(I,Cross,M3*6,Zn-Cc)*4 (LPL,AUO)

(I,Cross,M3*4,Zn-Cc)*4 (Samsung)

spring*2

fix-plate1*1

(P,cross,T.T-3*4,Zn)*1

fix-plate2*1

(P,cross,T.T-3*4,Zn)*1

EMI clip*4

foam,poron, adhesive*1

button fuction key*1

front bezel*1

vent left*1

kensington lock*1

vesa release button*1

BACK COVER ASSY*1

light cover*2

usb board*1

(P,Cross,W/WAS,M3*6,Zn-Cc)*1

usb cover*1

keypad support*1

(I,Cross,M3*4,Zn-Cc)*1

keypad board*1

PANEL ASSY*1

(P,Cross,M4*10,BLACK-NL)*4

logo plate*1

FRONT BEZEL ASSY*1

STAND ASSY*1

FINALASSY*1

Service Manual

Chapter 5- TEST AND ADJUSTMENT

Function key Definitions

Power Switch with power LED indicator

Front Panel Controls 1- Input select: Select input signal

Factory Modes Keys Function Auto Color Balance

Power: On/Off, i ncludes power indicator and Power ICON Green- Active On Amber- DPMS

2- Menu: Call out OSD Menu and choose 3- (-): symbol molded into button, calls out brightness/Contrast, move down the highlight bar. 4-(+)symbol molded into button , move up the highlight bar

Purpose: Automatically calibrate chip ADC parameter by using chip internal DAC. Process: If we want to do “Auto Color Balance” again, please co nfirm the following steps.

1) Connect the VGA cable with the standard video pattern generator

and display the pattern with blackest and whitest colors.

2) Press “Power Key”, to power off the monitor.

3) Press “Menu Key” and “Up Key” simultaneously, and then press

“Power Key” to power on the monitor.

4) Press “Menu Key”, choose “Factory Reset”, then “Factory”.

5) Set Burn In Mode item to ON, then execute Auto Color item.

6) After the “Auto Color Balance ” process finished, go back to

“Factory Reset” of Main Menu, and press “All Setting” to exit Factory Menu.

Factory Mode Introduction

Fig.1 Fig.2

Service Manual

With signal input, press “Power” button to turn off the monitor. Press “Menu” and “Auto/Plus” buttons together, and th en press “Power” button to turn on the monitor. After power on, press “Menu” button to call out Main Menu (Fig.1). Pull down to Factory Reset and enter Factory mode (Fig.2).

AUO M170EG01: Current using panel

Exit : Exit from Factory mode and back to Reset to Factory Settings. Panel: The current-setting panel is highlighted. “Restart the panel” will be shown with changing to another panel. Auto Color: Automatically calibrate chip ADC parameters by using internal DAC. (Only with Burn-in ON) Burn In: Enable or disable the Burn-in mode by choosing ON or OFF. Reset Timer: Reset the “Turn-on time” of the panel to 0H0M. Color Temp : The R, G, B of Blue Preset (9300K), Red Preset (5700K) and Normal Preset (6500K) are generated

from scaling chip’s back-end white-balance program.

Time : Turn-on time of the panel.

DDC-CI: DDC/CI ON/OFF setting. The DDC/CI shall be defaulted as “ON”.

Please do not change the value of Offset1, Offset2, and Gain; which will be changed with the auto color balance.

Burn-in pattern

If it is a new monitor without VGA cable plugged in, burn-in pattern will self-generate automatically. Burn-in pattern will not be stopped until plugging in the VGA cable. Then, press “Menu” button to call out

OSD Main Menu ; pulling down to Factory Reset item and execute All Resetting to disable Bun-in ON.

Auto Color Balance (Automatically calibrate chip ADC parameter by using chip internal DAC.)

5.1 If it is a new-built set, press “Auto/Plus” button to execute “Auto Color” at 32gray scale pattern.

5.2 Please confirm the following steps to perform “Auto Color Balance”:

- Connect the VGA cable with the standard video pattern generator and display 32gray scale pattern on the monitor.

- Press “Power” button to power off the monitor.

- Press “Menu” and “Auto/Plus” buttons simultaneously; then press “Power” button to power on the

monitor.

- Press “Menu” button, pull down to Factory Reset and choose “Factory” item.

- Set Burn In to ON, then execute Auto Color.

- With “Auto Color” finished, return to Reset to Factory Settings OSD and execute All Settings to enable burn-in OFF.

+ 56 hidden pages