Dell 1907FPf Service manual

Service Manual

Service Manual

LCD Monitor 1907FPf

- 0 -

1

Service Manual Versions and Revision

No.	Version	Release Date	Revision
1	1.0	2006/6/03	Initial Release

Copyright

Copyright 2006 InnoLux Display. Corp. Ltd

All Rights Reserved

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.	SAFETYPRECAUTIONS.......................................................................................................................................................................		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 PARTS 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 ..................................................................................................................................................	!
3.	FACTORY MODE INTRODUCTION............................................................................................................................................................		22
4.	BURN-IN PATTERN.....................................................................................................................................................................................		23
5.	AUTO COLOR BALANCE (AUTOMATICALLY CALIBRATE CHIPADC 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................................................................................................................................	!
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.	AT 32-GRAY SCALE PATTERN, COLOR LOST IN SOME SCALE................................................................................................................		41
ATTACHMENT 1- BILL OF MATERIAL...................................................................................................................		!
ATTACHMENT 2- SCHEMATIC .........................................................................................................................................................................			55
ATTACHMENT 3- PCB LAYOUT ........................................................................................................................................................................			70

2

Service Manual

Chapter 1- PRECAUTIONS & 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:

•This monitor should be operated only at the correct power sources indicated on the rating label on the rear cover of the monitor. If yo u’re unsure the power supply in your residence, consult your local dealer or Power Company.

•Use only the specified power cord that comes with this monitor.

•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.

•Do not remove the monitor cabinet. There is highvoltage parts inside that may cause electric shock to human bodies.

•Stop using the monitor if the cabinet is damaged. Have it checked by a service technician.

•Put your monitor only in a lean, cool, dry environment. If it gets wet, unplug the power cable immediately and consult your closed dealer.

•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.

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

PRODUCT SAFETY NOTICE

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

•When replacing parts on circuit boards, clamp the solder wires around terminals before soldering.

•Keep wires away from high voltage, high temperature components and sharp edges.

•Keep wires in their original position so as to reduce interference.

•Adjustment of this product please refers to the user’manual.

•Use Pb free solder wire for circuit board preparation.

3

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

4

Service Manual

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.

TFT LCD Panel 17

M170EG01 (AUO)

LM170E01-TLB3/B4 (LPL)

Backlight ON-OFF/Brightness CTRL

CN501

CN3

+5V

+16V

CN4

DC-DC

Power 5V

T2

SNUBBER

D854

5V

for Panel

5V-3.3V

Charge

4 .

3.3V-1.8V

U403

Q850

pump

AP9971G AP9971G

24C16

AP2761

6

8

DC-DC

+16V

Q6 Q7

9

16V-5 V

318MHz.14

OZ9936G

Current

.

11

U401

XTAL

sense

1

12

U1

U850

2

.

1

Gm5621-LF

2

SG6841

3

T850

U402

R. G. B. H. V

Serial flash

OVP

24MHz

XTAL

I850

4

1

817B

U301

-

+

T1

3 2

CN401

ESD

24C02

P001,

CN2

D850

Protection

U901

U302

AC Line-in

DC-DC

DDC_CLK

SMSC

P002

16V-12V

24C02

CN1

filter

DDC_DATA

CN850

CN302

CN301

USB Hub

AC Socket

P902

CN853

DVI

D-SUB

P901

AC 90V-240V

Audio

Digital

Analog

PC Hub

Input

Function Key

Device

Board

Video Input

Video Input

Input

5

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 from 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 buildin 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 U850 begins to work Pin8 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 buildin 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 gm2621LF 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 buildin 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.

6

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 T1and 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 clamped 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 D328 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 D329.

-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

7

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 “S elect”.

-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 Activelow 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

3.1Analog

	Standard		Resolution	Horizontal Frequency	Vertical Frequency
				(KHz)	(Hz)
			640 x 480	31.469	59.940
			640 x 480	37.500	75.000
			800 x 600	37.879	60.317
	VESA		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
	IBM DOS		720 x 400	31.469	70.087
				8

						Service Manual
	3.2 Digital
		Standard		Resolution	Horizontal Frequency	Vertical Frequency
					(KHz)	(Hz)
				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

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 U851.DC_5V is voltage for panel and USB IC U901, DC_3.3v is main voltage 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 puls(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

0V

10%

90%

90%

10%

T1

T2

T5

T6

Signals

T7

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)	0.0~10	0.5~50	>200	>200	0.5~50	0.5~10	>1000
SPEC(LPL)	0.5~10	0~50	>200	>200	0.0~50	0.5~10	>1000

9

Service Manual

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

	2
															Pin	Symbol
1													3		1	Line
															2	GND
	CN850														3	Neutral

7. DVI Connector Pin Assignment

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 +	TMDS Data 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 -

10

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	Ground
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

11.1CN501 (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 (-)
		11

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		10	GND

12

					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	Symbol		I/O	Description
	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	RESERVED		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
	32	O_CH3N_LV		O	LVDS odd channel 3 negative. Reserved for gm5611 and
					gm2621
	33	O_CLKP_LV		O	LVDS odd channel clock positive. Reserved for gm5611 and
					gm2621
	34	O_CLKN_LV		O	LVDS odd channel clock negative. Reserved for gm5611 and
					gm2621
	35	O_CH2P_LV		O	LVDS odd channel 2 positive. Reserved for gm5611 and gm2621
	36	O_CH2N_LV		O	LVDS odd channel 2 negative. Reserved for gm5611 and
					gm2621
	37	O_CH1P_LV		O	LVDS odd channel 1 positive. Reserved for gm5611 and gm2621
	38	O_CH1N_LV		O	LVDS odd channel 1 negative. Reserved for gm5611 and
					gm2621
	39	O_CH0P_LV		O	LVDS odd channel 0 positive. Reserved for gm5611 and gm2621
	40	O_CH0N_LV		O	LVDS odd channel 0 negative. 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
					13

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/	I	DDC2Bi clock for DVI Port or host I2C clock signal for
	HOST_SCA		debugging
67	DDC_SDL_DVI/	I/O	DDC2Bi clock for DVI Port or host I2C data signal for
	HOST_SDA		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 gm2621 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 externa l 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.

14

				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 ground 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 AVSS_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

15

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 device.

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

Symbol

I/O

Description

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

attached to the HUB ports

6

USBDP1

I/O

This pin connect to the downstream USB peripheral device

attached to the HUB ports

7

VDDA33

+3.3V Filtered analog power

8

USBDP2

I/O

This pin connect to the downstream USB peripheral device

attached to the HUB ports

9

USBDN2

I/O

This pin connect to the downstream USB peripheral device

attached to the HUB ports

10

VSS

Ground

11

USBDN3

I/O

This pin connect to the downstream USB peripheral device

attached to the HUB ports

12

USBDP3

I/O

This pin connect to the downstream USB peripheral device

attached to the HUB ports

13

VDDA33

+3.3V Filtered analog power

14

USBDP4

I/O

This pin connect to the downstream USB peripheral device

attached to the HUB ports

15

USBDN4

I/O

This pin connect to the downstream USB peripheral device

attached to the HUB ports

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

support is enabled via EEPROM or SMBus.

16

				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 1Us.
	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

17

Service Manual

								monitors VBUS_DET to determine when to assert the internal
								D+ pullup 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 info rmation 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

18

1

13

9

17

12

14 11

15

8

3

5

2

		7
S-1 x6
1	S-1
	10	S-5 x4
S-6 x4
S-3 x2
16	S-4
6
19
S-3 x4	4

NO.	Designation	Identification NO.	Q't	Remark	NO.	Designation	Identification NO.	Q't	Remark
	ASSY,BEZEL,FRONT,LP1903	714030004800R	1	714030004810R (TCO 03)		INSULATOR(for CHASSIS)	505040202400R	1
	1907FP-BEZEL_FRONT	501010204800R	1	501010204810R (TCO 03)		INSULATOR(for PANEL)	505040202600R	1
	1707FP-BUTTON	501030100600R	1			SPACER,RCM19	512004000100R	1
	DELL Badge	506102000600R	1	506102000610R (TCO 03)		FOAM, FORON, ADHESIVE, L18*W2.5*H1.5mm	511501000200R	1
	Foam (Black)	511501000100R	1			TAPE,ACE,85x28mm,LE1911	506381001100R	1
	ASSY,COVER,BACK,LP1903	714050004800R	1
	1907FP-BACK_COVER	501020206400R	1			LCD PANEL 19"(LPL,AUO,Samsung)		1
	1907FP-REAR_VENT(L)	501280200200R	1			PCBA,PWR_BOARD Ass'y		1
	1907FP-REAR_VENT(R)	501280200210R	1			PCBA,IF_BOARD Ass'y 19"		1
	VESA Release Button	501030202320R	1			PCBA,KEY_PAD		1
	KENSINGTON_LOCK	502210100300R	1			LVDS,FFC		1
	ASSY,CHASSIS,LP1903	701000001100R	1
	1907FP-CHASSIS	502090302600R	1
	BRACKET_VESA(L),LE1X13	502020300800R	1
	BRACKET_VESA(R),LE1X13	502020300810R	1
	SHIELD_SLIDE	502040000310R	1
	SPRING,Φ0.5*D5*H17	504010000300R	2
	SCREW,P,CROSS,T.T-3*4,Zn	509112304100R	2
	KEYPAD_SUPPORT	502080100100R	1			Screw,P,Cross,W/WAS(7.8),M3*6,Zn-Cc	509146306202R	7
	SHIELD_USB	502040604700R	1			Screw,B,Cross,W/W(T),M4*6,Zn	509476606100R	1
	SHIELD_LIGHT	502040604800R	2			Screw,I,Cross,M3*6,Zn-Cc	509016306200R	6(2) use 2 pcs if Samsung panel		LP1903 Exploded Drawing
		714010004800R	1			Screw,I,Cross,M3*4,Zn-Cc	509016304200R	1(5) use 5 pcs if Samsung panel
						Screw,P,Cross,M4*10,Black-NL	509116610510R	4	Nick Cheng	2006.04.08
						Bolt,#4-40*12.5,Ni	509000001000R	4
									GC Lin	LP1903

Manual Service

Assembly & Disassembly -4 Chapter

Diagram Exploded

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

fix-plate2*1

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

spring*2

slide*1

chassis*1

EMI clip*4

	keypad board*1
FINAL ASSY*1	keypad support*1
	(I,Cross,M3*4,Zn-Cc)*1
	usb cover*1

STAND ASSY*1

usb board*1

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

		light cover*2
	FRONT BEZEL ASSY*1	panel*1
		mylar for panel*1
		Tape ACE*3(LPL) or 2(AUO)
		(I,Cross,M3*6,Zn-Cc)*4 (LPL,AUO)
		or
		(I,Cross,M3*4,Zn-Cc)*4 (Samsung)
	BACK COVER ASSY*1	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

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

20

Service Manual

Assembly Block

LP1903 ASSEMBLY BLOCK

CHASSIS ASSY*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

chassis*1

slide*1

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

		panel*1	foam,poron,
			adhesive*1
	back cover*1	mylar for panel*1
		Tape ACE*3(LPL) or 2(AUO)	button fuction key*1
		(I,Cross,M3*6,Zn-Cc)*4 (LPL,AUO)
		(I,Cross,M3*4,Zn-Cc)*4 (Samsung)
	vent right*1		front bezel*1
		light cover*2
			logo plate*1
	vent left*1	usb board*1
		(P,Cross,W/WAS,M3*6,Zn-Cc)*1
		usb cover*1	FRONT BEZEL ASSY*1
	kensington lock*1
		keypad support*1
	vesa release button*1	(I,Cross,M3*4,Zn-Cc)*1	STAND ASSY*1

keypad board*1

	BACK COVER ASSY*1	PANEL ASSY*1	FINALASSY*1
		(P,Cross,M4*10,BLACK-NL)*4

21

Service Manual

Chapter 5- TEST AND ADJUSTMENT

Function key Definitions

Power Switch with power LED	Power: On/Off, includes power indicator and Power ICON
indicator	GreenActive On
	AmberDPMS
Front Panel Controls	1- Input select: Select input signal
	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
Factory Modes Keys Function	Auto Color Balance
	Purpose: Automatically calibrate chip ADC parameter by using chip
	internal DAC.
	Process: If we want to do “Auto Color Balance” again, please confirm
	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
	22

Service Manual

With signal input, press “Power” button to turn off the monitor. Press “Menu” and “Auto/Plus” buttons together, and then 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 Burnin 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 selfgenerate automatically. Burnin 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 Bunin ON.

Auto Color Balance (Automatically calibrate chip ADC parameter by using

chip internal DAC.)

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

5.2Please 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 burnin OFF.

23