IBM 9493-aw1-ag1 Schematic

COLOR MONITOR

SERVICE MANUAL

CAUTION

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

MODEL: 9493-AW1

(6bit)

9493-AG1

(6bit)

6Bit Module

Issue Date: APRIL 2000

CONTENTS

SPECIFICATIONS

- 2 -

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 : 6-bit, 262,144 colors Active Video Area : 307.2mm x 230.4mm 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 : 45° min. Bottom : 30° min.

2-4. Contrast Ratio : 200° typ.

3. SIGNAL (Refer to the Timing Chart)

3-1. Sync Signal

1) Type : Composite : Separate TTL : Sync-On-Green (SOG)

2) Input Voltage Level: Low=0~0.8V, High=2.1~5.5V

3) Sync Polarity : Positive or Negative

3-2. Video Input Signal

1) Type : R, G, B Analog

2) Voltage Level : 0~0.714 V

a) Color 0, 0 : 0 Vp-p b) Color 7, 0 : 0.467 Vp-p c) Color 15, 0 : 0.714 Vp-p

3) Input Impedance : 75 Ω

3-3. Operating Frequency

Horizontal : 31 ~ 70 kHz Vertical : 56 ~ 85 Hz

4. POWER SUPPLY

4-1. Power Adaptor

Input : AC 90~264V, 50/60Hz 1.2A Output : DC 24V 1.5A

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 (3,657m)

6. DIMENSIONS (with TILT/SWIVEL)

Width : 401.3 mm (15.80'') Depth : 250 mm (9.84'') Height :

Max

– 463.5 mm (18.25'')

Min– 338.5 mm (13.33'')

7. WEIGHT (with TILT/SWIVEL)

Net. Weight : 7.1 kg (15.66 lbs) Gross Weight : 9.1 kg (20.07 lbs)

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

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

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

OPERATING INSTRUCTIONS ................................ 5

WIRING DIAGRAM ................................................. 7

DISASSEMBLY ....................................................... 8

BLOCK DIAGRAM ................................................. 10

DESCRIPTION OF BLOCK DIAGRAM.................. 12

ADJUSTMENT ...................................................... 13

TROUBLESHOOTING GUIDE .............................. 14

PRINTED CIRCUIT BOARD................................... 18

EXPLODED VIEW...................................................20

REPLACEMENT PARTS LIST ...............................22

PIN CONFIGURATION............................................29

SCHEMATIC DIAGRAM......................................... 34

PACKING AND ACCESSORIES.............................41

MODE

POWER ON (NORMAL)

STAND-BY

SUSPEND

OFF

POWER OFF

H/V SYNC

ON/ON OFF/ON ON/OFF

OFF/OFF

POWER CONSUMPTION

less than 30 W

less than 3 W less than 3 W

LED COLOR

GREEN

AMBER FLASHING AMBER FLASHING AMBER

OFF

VIDEO

ACTIVE

OFF OFF OFF

- 3 -

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 IBM 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 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.

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 25,000 hours.

Top (Upper) Backlight Ass’y

(P/N: 6913TZZ001D)

Bottom (Lower) Backlight Ass’y

(P/N: 6913TZZ001E)

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

TIMING CHART

- 4 -

VIDEO

SYNC

H / V

H (Pixels) V (Lines) H (Pixels) V (Lines) H (Pixels) V (Lines) H (Pixels) V (Lines) H (Pixels) V (Lines) H (Pixels) V (Lines) H (Pixels) V (Lines) H (Pixels) V (Lines) H (Pixels) V (Lines) H (Pixels) V (Lines) H (Pixels) V (Lines) H (Pixels) V (Lines) H (Pixels) V (Lines) H (Pixels) V (Lines) H (Pixels) V (Lines) H (Pixels) V (Lines)

Sync

Polarity

– –

– – – – – – – –

+ + + + + + + + + +

– – – – – –

+ + + +

Dot

Clock

25.175

28.322

25.175

30.24

31.5

36.0

40.0

50.0

49.5

56.25

57.2832

78.75

95.50

Frequency

31.468 KHz

70.0 Hz

31.468 KHz

70.0 Hz

31.469 KHz

60.0 Hz

35.00 KHz

66.67 Hz

37.50 KHz

75.0 Hz

43.27 KHz

85.0 Hz

35.156 KHz

56.25 Hz

37.879 KHz

60.3 Hz

48.077 KHz

72.188 Hz

46.875 KHz

75.0 Hz

53.670 KHz

85.06 Hz

49.725 KHz

74.55 Hz

48.363 KHz

60.0 Hz

56.476 KHz

70.0 Hz

60.023 KHz

75.0 Hz

68.670 KHz

85.0 Hz

Resolution

640 x 350

720 x 400

(TEXT)

640 x 480

800 x 600

832 x 624

(MAC)

1024 x 768

Total

Period

( E )

800 449 900 449 800 525 864 525 840 500 832 509

1024

625

1056

628

1040

666

1056

625

1048

631

1152

667

1344

806

1328

806

1312

800

1376

808

Video

Active

Time ( A )

640 350 720 400 640 480 940 480 640 480 640 480 800 600 800 600 800 600 800 600 800 600 832 624

1024

768

1024

768

1204

768

1024

768

Blanking

Time

( B )

160

180

160

224

200

192

224

256

240

256

248

320

304

288

352

Sync

Duration

( D )

108

128

120

136

Back

Porch

( F )

48 60 55 34 48 33 96 39

120

16 80 25

128

22 88 23 64 23

160

152

224

160

144

176

208

Front

Porch

( C )

16 37 17 13 16 10 64

1 56 37 16

1 32

1 24

3 24

3 16

1 48

MODE

OPERATING INSTRUCTIONS

- 5 -

FRONT VIEW REAR VIEW

Front Control Panel

1. 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.

2. Power ON/OFF Button

Switches the monitors on and off.

3. ENTER Button

1) Displays main OSD menu.

2) Enters highlighted menus and submenus.

3) Selects highlighted option.

4. Arrow Key

Moves the cursor to highlight icons or make adjustments.

1) Brings up Contrast control OSD.

2) Left and Right arrows pressed together bring up auto setup.

5. Exit Button

1) Exits from menus, sub menus.

2) Exits from OSD.

Front Control Panel

Adapter

Signal Connector

On-Screen-Display (OSD) Control

The settings adjustable with the user controls are viewed through the On -Screen Display (OSD). Press the enter button

[ ] to display the main OSD menu.

Initial appearance of OSD

- 6 -

MAIN MENU

BRIGHTNESS

Main Manu;

Sub Manu;

Image Set-Up: The IMAGE SET-UP function

is used to adjust the level of noise in the video signal which causes horizontal lines or areas on the screen where the image appears to be unstable and jitters or shimmers. This can be done automatically or manually.

If manual is selected, the user will go to the manual adjustment screen.

Color: Select the Color Mode you find most comfortable and then fine tune the colors using the User Color Mode menu, if necessary.

Brightness: To adjust the screen brightness level.

Contrast: To adjust the image contrast level.

Icon Description

Listed below are icons, icon names.

OSD Position:

Changes the position of the

OSD on the screen.

Reset: Reset should return all available functions (apart from language which should not change unless adjusted via the LANGUAGE menu) fo their factory presets.

Icon Description

H-Position: Moves the screen left and right.

V-Position: Moves the screen left and right.

Image Size: This function displays the image in

its original size or enlarged size so as to fit in the full screen of the LCD panel.

Language: The language chosen affects only the language of the OSD. Select one of the five language to use for the OSD. It has no effect on any software running on the computer.

OSD Time: To select OSD display duration time. (5 - 60 seconds)

Information: The model name, serial number, year of manuracture and current display mode should be included in the Information screen. To inform users of the current mode the monitor is using, and also shows the preset and user modes stored in the monitor. The current display mode be shown at the base of the preset mode and user mode displays. Use the left and rigth buttons to see the preset modes and user modes screens.

WIRING DIAGRAM

- 7 -

CN1

CN2

CN3

J10

- 8 -

DISASSEMBLY

(a)

Cable Cover

Rear Cover

(a)

1. TILT/SWIVEL REMOVAL

(1) Remove the Cable Cover. (2) Remove four screws (a). (3) Remove the Tilt/Swivel. (4) Remove the Rear Cover.

2. BACK COVER REMOVAL

(1) Remove four Screw Covers (a). (2) Remove four screws (b). (3) Remove the Back Cover Ass’y.

(b)

(a)

(c)

Main Frame

Power PCB Ass’y

Main PCB Ass’y

Control PCB Ass’y

3. MAIN, CONTROL & POWER PCB ASSEMBLY REMOVAL

(1) Remove nine screws (a). (2) Disconnect J4 and J10. (3) Remove the Metal Rear. (4) Disconnect J2. (5) Remove seven screws (b). (6) Remove the Power PCB Ass’y. (7) Remove four screws (c). (8) Remove the Main PCB Ass’y. (10) Remove the Control PCB Ass’y.

(b)

(a)

(b)

(a)

(b)

(a)

(b)

(a)

- 9 -

(a)

4. CABINET ASSEMBLY, METAL REAR & INVERTER PCB ASSEMBLY REMOVAL

(1) Remove six screws (a). (2) Remove the Cabinet Ass’y. (3) Remove four screws (b). (4) Remove the Metal Rear. (5) Disconnect CN2 and CN3. (6) Remove the Inverter PCB Ass’y.

5. BACKLIGHT REMOVAL

(1) Remove two screws (a). (2) Remove the Backlight from the LCD Module.

(a)

Metal Rear

Inverter PCB Ass’y

CN3

LCD Module Ass’y

CN2

(b)

Cabinet Ass’y

BLOCK DIAGRAM

- 10 -

POWER CORD

D VI-A to 15-pin D-SUB Signal Cable

POWER

SUPPLY

CONTROL PCB

INVERTER PCB

MAIN LOGIC

PCB

LCD MODULE

System Block Diagram

- 11 -

Digital

Video

Pre Amp +

ADC +PLL

(AD9884)

Power Connector

REG

I2C

Control

OSD

EEPROM

(24LC16B)

Link Connector

Control

Signal

DVI-

Analog

Cable

8 BIT

+24V +24V

3.3 VD

3.3 VA

H/V Sync POL/DET

+5V

+3.3V

MEMORY

2M Byte X 3

ADDR

DATA

/RD

/WR

SOG-Out

I2C

+5VST

I2C

REG

+5V ST

+3.3V

Digital

Video Processor

(MX88L281)

System Controller

(MC68HC05BD32)

DDC

EEPROM

(24C02)

Sync Process

(M52347FP)

Switching

(MC14066)

V-sync2

H-sync2

H-sync3

H-sync

V-sync

V-sync3

Clamp

5VST

OSD

Generation

(LSC3862DW

)

REG

+5V

H-sync

I2C

H-sync

Detect

BLOCK DIAGRAM

DESCRIPTION OF BLOCK DIAGRAM

- 12 -

1. Video Amp & PLL & A/D Converter Circuit

AD9884(U5) is one chip IC which it supports three function block of Video Amp, PLL and A/D converter. Video signal (0.7Vp.p) clamped through C63, 64, 65 inputs to U5’s R, G, and B pins. The signal level is 0.7Vac added 4Vdc. This signal is processed as a proper 8 bit digital signal for input of MX88L281 (U1) by U5’s amplifying, phase locking, and A/D converting operation. U5 generates clock and horizontal sync for MX88L281 (U1) with MC14066B(U11)’s output horizontal sync signal. Sync Process (U14)’s clamp output makes U5 keep video signal’s voltage from zero to AC signal’s minimum level constantly regardless of various input video signals.

2. Macronix Circuit (Scaler chip)

The MX88L281 (U1) gets the video signal converted analog to digital from U18, and carries out four function of image processing that interpolates input signal less than 1024x768 resolution to that of 1024x768 resolution, displays one to one image without interpolation, mixes OSD(On Screen Display) signal by interfacing with OSD IC (U2), and controls three memories(U6, 7, 8) as frame converter. U1 outputs signals of HSYNC-OUT, VSYNC-OUT, DEN, CLKA-ODD, and each 8 bit R, G, B to transmitter IC (U16).

3. Memory Circuit

2M byte SDRAM(U6, 7 , 8) is used as a frame converter for supporting up to 85 Hz frame rate and controlled by MX88L281(U1). The control signals are CKA, CLK, UDOM, LDOM, /WE, /CAS, /RAS, /CS, /BA.

4. Panel-Link Circuit

Panel link transmitter (U16) delivers digital signal to the receiver inside LCD module by method of abstraction. The abstracted signals are pairs of TX0+-, TX1+-, TX2+-, TXC+- of which voltage swing is 0.5V each. Its swing is similar to LVDS (Low Voltage Differential Signal). Transmitter (U16) gets signals of HSYNC-OUT, VSYNC-OUT, DEN, CLKA-ODD from U4, and outputs LVDS through TX pin. When PD pin’s input is low, transmitter goes to power down mode.

5. System Controller (Microprocessor) Circuit

1) Microprocessor (U4) distinguishes polarity and frequency by calculating horizontal and vertical sync input from signal source.

2) Microprocessor (U4) carries out power control by sending power-down trigger signal to each IC. U1, U5, and U16 has PD(Power-down) pin which operates at active-low each.

3) Microprocessor (U4) communicates with EEPROM (U10), AD9884 (U5), MX88L281 (U1), and OSD IC (U2) through SCL and SDA or 8 bit bus line. It makes all devices with communication channel operated properly.

4) Microprocessor (U4) let User adjust screen by each OSD function.

6. DC/ DC Converter

This circuit supplies DC power for each device needing DC voltage of 3.3VD, 3.3VD1, 3.3VA, PVD_ADC, 5VA and 5VSTD. LM2674(U13)and LM2596(U15) , the DC/DC controller IC converts input 24Vdc into each voltage to be needed with peripheral circuit composed of Choke Coil (L8, 9), condensing components (ZD5, ZD6) and Regulators

(U22, 19, 20,2 3, 24). 5VSTD is supplied for Microprocessor through regulators (U22). MODPWR for LCD module power are supplied by switching FET(U12) and regulator(U16), controlled by Microprocessor’s triggering signal (M-PWR ON).

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