AOC TFT5017, FP5017 Service Manual

SERVICE MANUAL

TFT-5017/FP5017 LCD MONITOR

FOR COMPAQ

Ver: 00

THESE DOCUMENTS ARE FOR REPAIR SERVICE INFORMATION ONLY. EVERY REASONABLE EFFORT HAS BEEN MADE TO ENSURE THE ACCURACY OF THIS MANUAL; WE CANNOT GUARANTEE THE ACCURACY OF THIS INFORMATION AFTER THE DATE OF PUBLICATION AND DISCLAIMS RE LIABILITY FOR CHANGES, ERRORS OR OMISSIONS,

MANUFACTURE DATA: Jun 22 2002

TABLE OF CONTENTS

PAGE

1. SPECIFICATIONS .................................................................................................... 3

1-1 GENERAL SPECIFICATIONS ...................................................….............. 3

1-2 LCD MONITOR DESCRIPTION .................................................................. 4

1-3 INTERFACE CONNECTOR .................................................................……. 4

2. PRECAUTION AND NOTICES ................................................................................ 5

2-1 ASSEMBLY PRECAUTION ......................................................................... 5

2-2 OPERATIONG PRECAUTION ..................................................................... 5

2-3 STORAGE PRECAUTION …........................................................................ 5

2-4 HIGH VOLTAGE WARNING ....................................................................... 5

3. OPERATING INSTRUCTIONS ................................................................................ 6

4. ADJUSTMENT .......................................................................................................... 7

4-1 ADJUSTMENT CONDITIONS AND PRECAUTIONS ............................... 7

4-2 ADJUSTMENTS METHOD ........................................................................... 7

4-3 FRONT PANEL CONTROL KNOBS ............................................................ 8

5. CIRCUIT DESCRIPTION .......................................................................................... 9

5-1 SPECIAL FUNCTION WITH PRESS KEY ……………………………….. 9 5-2 SIMPLE INTRODUCTION ABOUT TFT5017/FP5017 CHIPSET ……... 9

6. TROUBLE SHOOTING CHART .............................................................................. 10

7. MECHANICAL OF CABINET FRONT DIS-ASSEMBLY...................................... 72

8. PARTS LISTING .........................................................................................………... 73

9. POWER SYSTEM AND CONSUMPTION CURRENT............................................ 107

10. PCB LAYOUT .....................................................................………………………... 108

11. SCHEMATIC DIAGRAM …..................................................................................... 109

1. SPECIFICATIONS FOR LCD MONITOR

1-1 General specifications

1. LCD-PANEL : Active display area 15 inches diagonal

Pixel pitch 0.297 mm x 0.297 mm Pixel format 1024 x 768 RGB vertical stripe arrangement

2. Display Color : 6-bit, 262144 colors

3. External Controls :

Horizontal Position, Vertical Position, Clock, Clock Phase and Auto Adjustment

Power On/Off, Brightness, Contrast, Color Select (6500°K, 9300°K, and Custom Color), Language

Selection, OSD Controls and the functions included in the Management Menu.,

4. Input Video Signal : Analog-signal 0.7Vpp

Video signal termination impedance 75 OHM

5. Scanning Frequencies : Horizontal: 30 KHz - 61 KHz Vertical: 56 Hz – 75 Hz Pixel clock: 80 MHz

6. Factory Preset Timing : 11 User Timings : 8 Input signal tolerance : H tolerance ±0.5 K, V tolerance ±1 Hz

7. Power Source : Switching Mode Power Supply AC 90 – 265 V, 50/60 Hz Universal Type

8. Operating Temperature : 5℃ - 35℃ Ambient

Non-operating Temperature : -20℃ - 60℃

9. Humidity :

Operating : 20% to 80% RH (non-condensing) Non Operating : 5% to 90%RH (38.7℃ maximum wet bulb temperature)

10. Weight :

5.8 kg

11. External Connection : 15Pin D-type Connector, AC power-Cord

12. View Angle : x-axis right/left = 60, y-axis up/down = 45

13. Outside dimension : Width x Height x Thickness = H:470 mm x W:183 mm x L:432 mm

14. Plug and Play : VESA DDC1/DDC2B

15. Power saving : VESA DPMS

AC-IN

1-2 LCD MONITOR DESCRIPTION

The LCD MONITOR will contain an main board, an inverter board, a power switch board and a keyboard. The main board will house the flat panel control logic, brightness control logic, DDC and DC-DC conversion to supply the appropriate power to the whole board and LCD panel, and transmitting TTL level signals into LCD Module to drive the LCD display circuit.

The inverter board will drive the two CCFLs (Cold Cathode Fluorescent Tube). The switching power board will provides the power ON/OFF control over the whole monitor and control for DPMS LED indicator. The function keyboard will provides the OSD control signal to the Main Board.

Monitor Block Diagram

Inverter Flat Panel

ADAPTER

1-3 Interface Connectors

(A) Power Cable (B) Video Signal Connectors and Cable

CCFT Drive.

Main Board

Keyboard

HOST Computer

Video signal, DDC

2. PRECAUTIONS AND NOTICES

2-1 ASSEMBLY PRECAUTION

(1) Please do not press or scratch LCD panel surface with anything hard. And do not soil LCD panel surface

by touching with bare hands (Polarizer film, surface of LCD panel is easy to be flawed)

In the LCD panel, the gap between two glass plates is kept perfectly even to maintain display

characteristic and reliability. If this panel is subject to hard pressing, the following occurs :

(a) Uniform color (b) Orientation of liquid crystal becomes disorder (2) Please wipe out LCD panel surface with absorbent cotton or soft cloth in case of it being soiled. (3) Please wipe out drops of adhesive like saliva and water in LCD panel surface immediately.

They might damage to cause panel surface variation and color change.

(4) Do not apply any strong mechanical shock to the LCD panel.

2-2 OPERATING PRECAUTIONS

(1) Please be sure to unplug the power cord before remove the back-cover. (be sure the power is turn-off) (2) Please do not change variable resistance settings in MAIN-BOARD, they are adjusted to the most

suitable value. If they are changed, it might happen LUMINANCE does not satisfy the white balance spec.

(3) Please consider that LCD backlight takes longer time to become stable of radiation characteristic in low

temperature than in room temperature.

(4) Please pay attention to displaying the same pattern for very long-time. Image might stick on LCD.

2-3 STORAGE PRECAUTIONS

(1) When you store LCD for a long time, it is recommended to keep the temperature between 0℃-40℃

without the exposure of sunlight and to keep the humidity less than 90% RH.

(2) Please do not leave the LCD in the environment of high humidity and high temperature such as 60℃

90%RH.

(3) Please do not leave the LCD in the environment of low temperature; below -15℃.

2-4 HIGH VOLTAGE WARNING

The high voltage was only generated by INVERTER module, if carelessly contacted the transformer on this module, can cause a serious shock. (the lamp voltage after stable around 600V, with lamp current around 8mA, and the lamp starting voltage was around 1500V, at Ta=25℃)

3. OPERATING INSTRUCTIONS

This procedure gives you instructions for installing and using the TFT5017/FP5017 LCD monitor display.

1. Position the display on the desired operation and plug the power cord into a convenient AC outlet.

Three-wire power cord must be shielded and is provided as a safety precaution as it connects the chassis and cabinet to the electrical conduct ground. If the AC outlet in your location does not have provisions for the grounded type plug, the installer should attach the proper adapter to ensure a safe ground potential.

2. Connect the 15-pin color display shielded signal cable to your signal system device and lock both screws on the connector to ensure firm grounding. The connector information is as follow:

11 15

15 - Pin Color Display Signal Cable

PIN NO.

DESCRIPTION

PIN NO.

DESCRIPTION

1. RED 9. 5V power from VGA-card

2. GREEN 10. GND

3. BLUE 11. NC

4. NC 12. SDA

5. GND 13. HORIZ. SYNC

6. GND-R 14. VERT. SYNC

7. GND-G 15. SCL

8. GND-B

3. Apply power to the display by turning the power switch to the "ON" position and allow about thirty seconds for Panel warm-up. The Power-On indicator lights when the display is on.

4. With proper signals feed to the display, a pattern or data should appear on the screen, adjust the brightness and contrast to the most pleasing display, or press auto-key to get the best picture-quality.

5. This monitor has power saving function following the VESA DPMS. Be sure to connect the signal cable to the PC.

6. If your TFT5017/FP5017 LCD monitor requires service, it must be returned with the power cord.

4. ADJUSTMENT

4-1 ADJUSTMENT CONDITIONS AND PRECAUTIONS

1. Approximately 30 minutes should be allowed for warm up before proceeding.

2. Adjustments should be undertaken only on following function :Horizontal Position, Vertical Position,

Clock, Clock Phase, Brightness, Contrast, Color Select (6500°K, 9300°K, and Custom Color)

4-2 ADJUSTMENT METHOD

Press MENU key to show OSD window or select function, and Left/Right key to switch the function controls or done the adjustment.

1. White-Balance, Luminance adjustment

Before started adjust white balance ,lets setting the Chroma-7120 MEM. Channel 1 to 9300 color and MEM. channel 2 to 6500 color, how to setting MEM.channel you can reference to chroma 7120 user guide or simple use “ SC” key and “ NEXT” key to modify xyY value and use “ID” key to modify your own description

Following is the step to do white-balance adjust

Press MENU key and Right key for 2 seconds at power on (replug power cord) will be in factory mode.

I. Bias (Low luminance) adjustment :

Wait for message “ Pass” appear then adjust OSD contrast and brightness to “90”.

II. Gain (High light) adjustment : a. adjust 9300 color-temperature

change chroma-7120 to channel 1,Switch the chroma-7120 to RGB-mode(with press “MODE” ) ,and selected OSD item “F” (at OSD right down corner), Enter AOC Compaq1 Menu The lcd-indicator will show x = 281 ±10, y = 311 ±10, Y = 230 ±5 cd/m

Adjust 9300k RGB until R=100, G=100, B=100, and then switch the chroma-7120 to xyY mode (With press “MODE” )

b. adjust 6500 color-temperature

change chroma-7120 to channel 2, Switch the chroma-7120 to RGB-mode(with press “MODE” ), The lcd-indicator will show x = 313 ±10, y = 329 ±10, Y = 230 ±5 cd/m

Adjust 6500k RGB until R=100, G=100, B=100, and then switch the chroma-7120 to xyY mode (With press “MODE” ) Press POWER-key off-on to quit from factory mode ( in USER-mode, the OSD location was placed at middle of screen)

2. Clock adjustment

Set the Chroma at pattern 63 (cross-talk pattern) or WIN98/95 shut-down mode (dot-pattern). Adjust until the vertical-shadow as wide as possible or no visible. This function is adjust the PLL divider of ADC to generate an accurate pixel clock Example : Hsyn = 31.5KHz Pixel freq. = 25.175MHz (from VESA spec)

The Divider number is (N) = (Pixel freq. x 1000)/Hsyn

From this formula, we get the Divider number, if we fill this number in ADC register (divider register), the PLL of ADC will generate a clock which have same period with above Pixel freq.(25.175MHz) the accuracy of this clock will effect the size of screen.(this clock was called PIXEL-CLOCK)

3. Phase adjustment

Set the Chroma at pattern 63 (cross talk pattern) or WIN98/95 shut down mode (dot-pattern). Adjust the horizontal interference as less as possible This function is adjust the phase shift of PIXEL-CLOCK to acquire the right pixel data . If the relationship of pixel data and pixel clock not so match, we can see the horizontal interference at screen only at crosstalk pattern and dot pattern we can find this phenomena, other pattern the affect is very light

4. H/V-Position adjustment

Set the Chroma at pattern 1 (crosshatch pattern) or WIN98/95 full-white pattern confirm above 2 functions (clock & focus) was done well, if that 2 functions failed, the H/V position will be failed too. Adjust the four edge until all four-edges are visible at the edge of screen.

5. MULTI-LANGUAGE function

There have 6 language for selection, press “MENU” to selected and confirm , press “ LEFT” or “ RIGHT” to change the kind of language.

6. Reset function

Clear each old status of auto-configuration and re-do auto-configuration ( for all mode) This function also recall 6500 color-temperature , if the monitor status was in “ Factory-mode” this reset function will clear Power-on counter too.

7. OSD-LOCK function

The OSD functionality shall be enabled or disabled by pressing the “menu” button and holding it for 10 seconds. Upon disabling the OSD, an OSD message of “OSD Lockout” shall be displayed for 10 seconds. When the OSD is locked and any OSD button is pressed, the OSD message “OSD Locked” shall be displayed for an additional 10 seconds. When the OSD is locked, holding the OSD button for 10 seconds will unlock the OSD and display the main menu.

8. View Hours Total Operation and Hours Backlight On ( if not necessary , not suggest to entry Service

Mode,it is entered by pressing the power switch while the menu button is held in.)

Total Hours track and record the total hours that it has been powered up. This value shall be stored

in the system memory. The Hours Total Operation shall be incremented 31 minutes after power is applied, and once each hour after that while power is still active.

Backlight Hours track and record the number of hours the backlight tubes have had power applied to them. This shall be independent of the brightness or contrast controls. The Hours Backlight On shall be incremented 31 minutes after power has been continuously applied to the backlight, and once each hour after that while power is still applied to the backlight.

The Backlight life time was guarantee minimal 30000 hours, the maintainer can check the record only in Service Mode. pressing the power switch while the menu button is held in will be in f service mode. “Reset Total Hours “ clear the powered up counter to zero hours. “Reset Backlight Hours “ clear Backlight

4-3 MAIN ADJUSTMENTS

Power Key : Press to turn on or off the monitor. Left Key : Press to perform automatic calculated CLOCK, PHASE, H/V POSITION, but no affect the color-

temperature Left/Right Key : press to perform select function or adjustment. MENU Key : press to show the OSD menu at the monitor or to confirm your function selection

Hours was used to record how long the backlight of panel already working, the backlight

Hours counter to zero hours.

5. CIRCUIT-DESCRIPTION

5-1 SPECIAL FUNCTION with PRESS-KEY

Press MENU key and Right key, at POWER-ON: set to FACTORY-mode, when we want to adjust white-

balance with rs232-port.

Press POWER-key off-on : CANCEL above function(quit from factory mode) and set to user-mode.

Press MENU key 10seconds : Enable/ Disable OSD-LOCK function

OSD-INDEX EXPLANATION

1. CABLE NOT CONNECTED :Check video cable.

2. INPUT NOT SUPPORT :

a. INPUT frequency out of range : H > 61kHz, v > 75Hz or H < 30kHz, v < 56Hz b. INPUT frequency out of VESA-spec. (out of tolerance too far)

3. UNSUPPORT mode, try different Video-card Setting :

Input frequency out of tolerance, but still can catch-up by our system (if this message show, that means, this is new-user mode, AUTO-CONFIG will disable)

5-2 SIMPLE-INTRODUCTION about TFT5017/FP5017 chipset

1. GM2115 (Genesis all-in-one solution for ADC, OSD,MCU,TCON,scalar and interpolation) :

USE for computer graphics images to convert analog RGB data to digital data for interpolation process, zooming, OSD font & overlay and generate drive-timing for LCD-PANEL,

2. W49F002 (Winbond flash memory, with 64k Rom-size) :

Use for store firmware, the firmware include calculate frequency, pixel-dot , detect change mode, rs232communication, power-consumption control, OSD-index warning…etc.

3. M24C02 (MicroChip IC) :

EePROM type, 1K ROM-SIZE, for saving DDC-CONTENT.

4. M24C16 (MicroChip IC) :

EePROM type, 4K ROM-SIZE, for saving AUTO-config data, White-balance data, and Power-key status, backliaht on-counter data and power up –counter data.

5. BA9741F (swintching regulator 12V to 5V and 12V to 3.3V) :

6. RT9164-25CG (RICH TEK brand regulator 5V to 2.5V)

MODULE-TPYE COMPONENT :

1. ADAPTER : CONVERSION-module to convert AC 90V-265V to 12VDC, with 3.33 AMP

2. INVERTER : CONVERSION-module to convert DC 12V to High-Voltage around 1600V, with frequency

30K-50Khz, 7mA-10mA

6. Trouble-Shooting

**Use the PC Win 2000/98/95 white pattern, with some icon on it, and Change the Resolution to 640x480 60

Hz / 31 KHz

I. NO SCREEN APPEAR

INVERTER BLOCK TROUBLE SHOOTING

Check the CN6 : Pin 1& Pin2 = 12v for Inverter power supply CN6 : Pin 4 = Lamp current control Æ must have 0 volt to 3.3 volt Voltage variable when adjust Brightness CN6 : Pin 6 = Inverter on-off control Æ must have 3.3volt when power switch on ( LED green ) and must have 0 volt When power switch off ( LED orange) Check all above status is meet or not ?

Check Adapter module have 12V output?

Check FPC cable loose or tight ?

Check Inverter Block Trouble shooting

Check Dc to Dc block trouble shooting

Check Scalar Trouble shooting

End

YES

Replace Inverter module to new one

If the product name of this monitor is T563KCDHKCCPA or T563KCDHKCCPN Check Dc to Dc Module block trouble shooting

DC to DC block trouble shooting

Check CN12 have 12v input ?

CHECK L3 have 3.3V output & L4 have 5V output? U9 Pin2 have 2.5V output

End

es no

Replace relative component

U9pin 2 = 2.5V

L3 pin 1 = 3.3VL4 pin 1 = 5V

yes

yes yes

DC to DC Module block trouble shooting

Check U11Pin2 or Pin3 have 5V input ?

Check U11Pin4 have 3.3V input ? (when power on) Check U11Pin4 have 0V input ? (when power off)

Check U11Pin7 have 9V output ?

Check U11Pin9 have -6V output ?

Check U11Pin12 have 3.6V output ?

Check U11Pin14 have 18V output ?

Replace Dc to Dc Module (U11) component

U11 pin 12 = 3.6V

U11 pin 2 & 3 = 5V

U11 pin 4 = 3.3V(power on) or

0V(power off)

U11 pin 7 = 9V

U11 pin 12 = 3.6V

U11pin 9 = -6V

AUDIO-MODULE Trouble shooting chart

NO VOICE OUTPUT

Plug-out the DC power , make sure the monitor is in OFF status .

Use OHM-METER measure U8 pin 3, 5 (channel-A ) is speaker well connected? Measure U8 pin 16,18 ( channel B) is speaker well connected ?

Plug-in the DC power, set the monitor ON status .

Check U8 pin 4,17 = VDD 5V

Check CN8 pin 1,4 have signal ?

Check U8 pin 6,15 have signal ?

Check U8 pin 3,5,16,18 have signal ?

End

Check CN7,CN11 is well connected?

YES

Check is speaker open circuit ?

Check Dc to Dc block 5V

Replace Audio Cable

Replace U8

Scalar BLOCK TROUBLE SHOOTING

Press the Power switch , Check the LED will switch from Green to dark or Orange to dark

Unplug the Signal cable ,there must have OSD message show “Cable not connected”

yes

The Mainboard & Flash part is working, please check your PC signal , may be the frequency out of range or in sleep mode.

Replace U5

Replace the Mainboard or replace GM2115

pei)

II.ALL SCREEN HAS INTERFERENCES OR NOISE, CAN’T BE FIXED BY AUTO KEY

** NOTE: There is so many kind of interferences, 1). One is cause by some VGA-CARD that not meet VESA spec

or power grounding too bad that influence our circuit

2).other is cause by external interferences, move the monitor far from electronic equipment.( rarely happened)

Use DOT-pattern, or win2000/98/95 shutdown mode pattern, press “AUTO” key, was the interferences disappear ??

Adjust “FOCUS” step by step, until the horizontal interferences disappear

Does your signal-cable have an additional cable for extension ??

Does your noise only exist in one mode only? (ex: only at 1024x768 @ 75 Hz, other is normal)

That was cause by you VGA-CARD setting, your VGA card timing backporch/frontporch exceed vesa timing too far, for some new AGP-VGA-CARD such situation always happened So in your control-panel icon ,select monitor ,setting ,

advance ,screen-adjust,at Size icon, increase step by step slowly, press “”AUTO”

key every step you increase the SIZE . repeat the procedure( increase/decrease SIZE one-step and press AUTO) until the interferences disappear, press “APPLY” to save in your VGA

NO additional extension cable

Yes, only happened on one mode

Yes, has extension

END

Put away the additional cable May be the additional cable grounding is not quite well

Change the Signal-cable to new-one or Try other brand VGA-CARD (make sure just only that brand VGACARD has this problem ,contact RDtai

III. DOS MODE has jitter

NOTE :the rule of doing AUTO-CONFIGURATION : must be a full-size screen, if the screen not full , the autoconfiguration will fail. So in dos mode ,just set your “CLOCK” in OSD-MENU to zero or use some full screen edit file (ex: PE2, HE) and press “AUTO”

IⅤ. THERE WAS SNOW PHENOMENA or BRIGHT NOISE ON THE SCREEN

When use pattern 32 Gray-scale / or 16 Gray scale, there is a snow phenomena on the screen (like a noise spread inside) that means data missing, may be cause by FPC loose, or resistor array cold-solder

Check the FPC loose or tight or Replace a new FPC

Re solder all resistor array from LP1 – LP13

Replace Mainboard to new one

V. THE PANEL LUMINANCE WAS DOWN

Set Contrast & brightness =maximal, RGB= 50 Quit from OSD-screen, measured Y(luminance) With chroma 7120, check Y= 250±10 CD/M2 ?

If Y can reach ＞230 cd/m2 that means The lamp still working well, so we just re-do the

white-balance process Please refer to page 7

If the Y less than 160 cd/m2 (after the Brightness & contrast = max) then change the LAMP of panel