Gateway FPD 1500 Service Manual

COLOR MONIT OR

SER VICE MANUAL

CAUTION

BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

MODEL: Gateway FPD 1500

1. LCD CHARACTERISTICS

Type : Color Active Matrix TFT LCD Size : 15.1inch (38.35cm) Pixel Pitch : 0.3mm x 0.3mm Pixel Format : 1024 x 768 pixels (XGA)

RGB Stripe Arrangement Color Depth : 8-bit, 16 million colors Active Video Area : 307mm x 230mm Surface Treatment : Anti-Glare, Hard Coating (3H) Backlight Unit : Two-CCFL (Cold Cathode

Fluorescent Lamp)

2. OPTICAL CHARACTERISTICS

2-1. Viewing Angle by Contrast Ratio

≥

10 Left : 60° typ., 55° min. Right : 60° typ., 55° min. Top : 45° typ., 40° min. Bottom : 45° typ., 40° min.

2-2. Luminance : 200 cd/m

typ.

2-3. Angle at Half Luminance

Left : 50° min. Right : 50° min. Top : 40° min. Bottom : 30° min.

2-4. Contrast Ratio : 250:1 typical

3. SIGNAL (Refer to the Timing Chart)

3-1. Type : TMDS Digital 3-2. Voltage Level : 3.3V 3-3. Input Impedance : 50Ω 3-4. Operating Frequency

Horizontal : 48.363kHz Vertical : 60Hz

4. POWER SUPPLY

4-1. Power Adaptor

Input : AC 100~240V, 50/60Hz 1.2A Output : DC 24V 1.9A

4-2. Power Consumption

5. ENVIRONMENT

5-1. Operating Temperature: 10°C~35°C (50°F~95°F)

(Ambient)

5-2. Relative Humidity : 10%~80%

(Non-condensing)

5-3. Altitude : 0~10,000ft (3,030m)

6. DIMENSIONS (with TILT/SWIVEL)

Width : 389.2mm (15.32'') Depth : 182.4mm (7.18'') Height : 361.6mm (14.24'')

7. WEIGHT (with TILT/SWIVEL)

Net. Weight : 5.3kg (11.68 lbs) Gross Weight : 7.2kg (15.87 lbs)

SPECIFICATIONS ................................................... 2

PRECAUTIONS ....................................................... 3

TIMING CHART ....................................................... 4

OPERATING INSTRUCTIONS ................................ 4

WIRING DIAGRAM ................................................. 5

DISASSEMBLY ....................................................... 6

BLOCK DIAGRAM ................................................... 8

TROUBLE SHOOTING GUIDE ............................... 9

PRINTED CIRCUIT BOARD................................... 12

EXPLODED VIEW...................................................14

REPLACEMENT PARTS LIST ...............................17

PIN CONFIGURATION............................................21

PACKING AND ACCESSORIES.............................27

SCHEMATIC DIAGRAM..........................................28

- 2 -

CONTENTS

MODE

POWER ON (NORMAL)

DPM

POWER OFF

SIGNAL

OFF

POWER CONSUMPTION

less than 30 W less than 5 W

less than 5 W

LED COLOR

GREEN

ORANGE

OFF

VIDEO

ACTIVE

OFF

SPECIFICATIONS

WARNING FOR THE SAFETY-RELATED COMPONENT.

• There are some special components used in LCD monitor that are important for safety. These parts are marked on the schematic diagram and the replacement parts list. It is essential that these critical parts should be replaced with the manufacturer’s specified parts to prevent electric shock, fire or other hazard.

• Do not modify original design without obtaining written permission from Gateway2000 Inc. or you will void the original parts and labor guarantee.

TAKE CARE DURING HANDLING THE LCD MODULE WITH BACKLIGHT UNIT.

• Must mount the module using mounting holes arranged in four corners.

• Do not press on the panel, edge of the frame strongly or electric shock as this will result in damage to the screen.

• Do not scratch or press on the panel with any sharp objects, such as pencil or pen as this may result in damage to the panel.

• Protect the module from the ESD as it may damage the electronic circuit (C-MOS).

• Make certain that treatment person’s body are grounded through wrist band.

• Do not leave the module in high temperature and in areas of high humidity for a long time.

• The module not be exposed to the direct sunlight.

• Avoid contact with water as it may a short circuit within

the module.

• If the surface of panel become dirty, please wipe it off with a softmaterial. (Cleaning with a dirty or rough cloth may damage the panel.)

WARNING

BE CAREFUL ELECTRIC SHOCK !

• If you want to replace with the new backlight (CCFL) or inverter circuit, must turn off the power button or disconnect the AC adapter because high voltage appears at inverter circuit about 650Vrms.

• Handle with care wires or connectors of the inverter circuit. If the wires are pressed cause short and may burn or take fire.

- 3 -

PRECAUTION

CAUTION

Please use only a plastic screwdriver to protect yourself from shock hazard during service operation.

CAUTION

• There is two backlight, must distinguish between the top (upper) and the bottom (lower), and be careful of treatment it.

• MTBF (Mean Time Between Failure) of a backlight is about 10,000 hours.

Top (Upper) Backlight Ass’y

(P/N: 6913TZZ001A)

Bottom (Lower) Backlight Ass’y

(P/N: 6913TZZ001B)

IF BRIGHTNESS OF THE LCD MODULE DARKEN, REPLACE THE BACKLIGHT ONE OR ALL.

- 4 -

VIDEO

SYNC

TIMING CHART

MODE

(Pixels)

(Lines)

Sync

Polarity

_ _

Dot Clock

65MHz

1024

768

48.363KHz

60.0Hz

1344

806

1024 320

768

136

160

Frequency

Total

Period

(A)

Video

Active

Time

(B)

Blanking

Time

(C)

Sync

Duration

(E)

Back

Porch

(F)

Front

Porch

(D)

Resolution

OPERATING INSTRUCTIONS

ID Label

Power ON/OFF Button

This button is used to turn the monitor on and off.

Power Indicator

This indicator lights up green when the monitor operates normally; in DPMS (Energy Saving) mode, -stand-by, suspend, or power off mode-its color changes to orange.

Brightness Control Buttons

Use these buttons for adjusting the brightness.

Power Input Socket

DFP Signal Connector

Front View

Rear View

- 5 -

WIRING DIAGRAM

CN1

CN3

J501

CN2

J8-1

J301

J302

J303

J304

CN601

DISASSEMBLY

- 6 -

ⓐ

1. TILT/SWIVEL REMOVAL

①Remove four screws ⓐ. ②Remove the Tilt/swivel.

2. BACK COVER REMOVAL

①Remove four screws ⓐ from the Back Cover. ②Remove the Back Cover.

3. INVERTER CAPS & TOP SHIELD REMOVAL

①Remove five screws ⓐ. ②Remove two Inverter Caps (Upper, Lower). ③Remove the Top Shield.

4. MAIN PCB ASSEMBLY REMOVAL

①Remove six screws ⓐ. ②Disconnect J301 and J501 from the Main PCB. ③Remove the PCB Shield. ④Remove five screws ⓑ. ⑤Remove the Main PCB from the PCB Shield.

ⓐ

ⓑ

ⓐ

Inverter Cap (Upper)

Inverter Cap (Lower)

Main PCB

PCB Shield

Back Cover

Top Shield

J501

J301

- 7 -

ⓒ

ⓐ

ⓑ

ⓐ

5. INVERTER, POWER, CONTROL PCB AND MAIN FRAME REMOVAL

①Remove two screws ⓐ. ②Disconnect CN1 and CN2. ③Remove Inverter PCB. ④Remove two screws ⓑ. ⑤Remove the Power and the CONTROL PCB. ⑥Remove four screws ⓒ. ⑦Remove the Front Cabinet.

6. BACKLIGHT REMOVAL

①Remove two screws ⓐ. ②Remove two Sponge Tapes. ③Remove the Backlight from the LCD Module.

ⓐ

7. LCD MODULE REMOVAL

①Remove four screws ⓐ. ②Divide the LCD Module and the Main Frame.

Bottom (Lower) Backlight Ass’y

Top (Upper) Backlight Ass’y

Front Cabinet

Power PCB

CONTROL PCB

Inverter PCB

LCD Module

Main Frame

BLOCK DIAGRAM

Description of Block Diagram

- 8 -

DFP 20Pin Connector

PanelLink Connector

EMI Filter

To LCD Module

T X 0

T X 1

T X 2

T X C

From PC

DPM_det

I2C

Power Connector

From AC/DC

Adapter

DC/DC

Converter

(Max785)

GND

+24V

Inverter

Connecter

Inverter

Power switching

(SI4925)

System

Controller

(68HC05BD1)

To key button

Voltage

Regulator

(78M12,05)

+5Vst

+5V

Voltage

Regulator

+5Vmod

+3.3Vcc

+24Vinv

Inv_onoff

PWM_in

Inv_onoff

PWM_in

P_ctrl

EEPROM

(24C02)

EEPROM

(24C02)

2 2 2

2 2 2 2

System Block Diagram

Block Diagram for Main Logic Board

1.DC/DC Converter

This curcuit supplies stand-by 5V(+5Vst) and regular 5V(+5V) for using MAX785 from AC/DC adapter(+24V). The +5V voltage supply to power swichng IC(SI4925) and 3.3V voltage regulator. The state of power down makes all voltage except +5Vst down using SHDN pin from system controller (68HC05BD1).

2. System Controller

This curcuit consists of two EEPROM IC(24C02) which stores the control data for system and communicates DDC(Display Data Channel) and oscillator(X201). The operating procedures of system controller and its associated circuit are as follows:

1) The system controller detects frequency of vertical sync through DFP(Digital Flat Panel) 20 pin connector.

This controller controls the power swiching IC(SI4925) by the detection of verticalsync(HVsync).

2) The system controller controls the brightness of inverter by using the key control button and store the data to EEPROM(24C02).

3. Power Swiching Circuit

This block supplies +24V(+24Vin) to the inverter for the backlight voltage of the LCD module and +5V (+5Vmod) for data control of the LCD module.

4. Signal Transmission

The digital video signals(R,G,B) and clock signals(CLK) by differencial signals(Tx0,Tx1,Tx2,Txc), are transmitted to LCD module through EMI filter from PC system which has digital video card.

LCD Module

Inverter PCB

Main Logic PCB

Button PCB

Power Supply

Power Cord

DFP Signal Cable

20Pin

+ 18 hidden pages

Gateway FPD 1500 Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual