Gateway FPD1700 Service Manual

COLOR MONITOR

SERVICE MANUAL

CHASSIS NO. : CL-29
F ACT OR Y MODEL: LB782F

MODEL: FPD1700

CAUTION

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

CONTENTS

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

PRECAUTIONS ....................................................... 4

TIMING CHART ....................................................... 5

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

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

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

BLOCK DIAGRAM AND DESCRIPTION ................ 9

SPECIFICATIONS

1. LCD CHARACTERISTICS

Type : TFT Color LCD Module
Size : 17 inch (43.2 cm diagonal)
Pixel Pitch : 0.264(H) x 0.264(V)
Elecctrical Interface : LVDS
Color Depth : 8-bits, 16,777,216 colors
Size (mm) : 383.5(H) x 306(V) x 20.0(D) Typ
Surface Treatment : Anti-Glare, Hard Coating (3H)
Operating Mode : Normally white
Backlight Unit : Four-CCFL (Cold Cathode

Fluorescent Lamp)

2. OPTICAL CHARACTERISTICS

≥

2-1. Viewing Angle by Contrast Ratio

Left : 70° Typ. , Right : 70° Typ.
Top : 45° Typ. , Bottom : 65° Typ.

10

ADJUSTMENT ...................................................... 12

TROUBLESHOOTING GUIDE .............................. 13

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

EXPLODED VIEW...................................................22

REPLACEMENT PARTS LIST ...............................24

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

SCHEMATIC DIAGRAM......................................... 31

4. POWER SUPPLY

4-1. Power

AC 100~240V, 50/60Hz , 1.0A

4-2. Power Consumption

MODE

POWER ON (NORMAL)

STAND-BY

SUSPEND

OFF

POWER OFF

5. ENVIRONMENT

H/V SYNC

ON/ON
OFF/ON
ON/OFF

OFF/OFF

VIDEO

POWER CONSUMPTION

ACTIVE

OFF
OFF
OFF

-

-

less than 45 W

less than 3 W
less than 3 W

less than 3 W
less than 3 W

LED COLOR

GREEN
AMBER
AMBER
AMBER

OFF

2

2-2. Luminance : 170 cd/m

(min) --- 9300K

200 (min.) 250 (typ.) --- 6500K

2-3. Contrast Ratio : 400 typ.

3. SIGNAL (Refer to the Timing Chart)

3-1. Sync Signal

• Type : Separate TTL (Positive/Negative)
Composite TTL (Positive/Negative)
SOG (Sync On Green)
Digital

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 : 30 ~ 80 kHz
Vertical : 56 ~ 85 Hz

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

(Ambient)

5-2. Relative Humidity : 5% ~ 95%

(Non-condensing)

6. DIMENSIONS (with TILT/SWIVEL)

Width : 400 mm (15.74'')
Depth : 235 mm (9.25'')
Height : 427 mm (16.81'')

7. WEIGHT (with TILT/SWIVEL)

Net. Weight : 7.5 kg (16.54 lbs)
Gross Weight : 9.3 kg (20.51 lbs)

Signal Connector Pin Assignment

1

8

9

17

24

16

C1

C4

C3

C2

C5

• DVI-I Connector (Digital/Analog)

Pin Signal (DVI-I)

T. M. D. S. Data2-

1

T. M. D. S. Data2+

2

T. M. D. S. Data2/4 Shield

3

T. M. D. S. Data4-

4

T. M. D. S. Data4+

5

DDC Clock

6

DDC Data

7

Analog Vertical Sync.

8

T. M. D. S. Data1-

9
10
11
12
13
14
15

T. M. D. S. (Transition Minimized Differential Signaling)

T. M. D. S. Data1+
T. M. D. S. Data1/3 Shield
T. M. D. S. Data3­T. M. D. S. Data3+
+5V Power
Ground

H. Sync. and V. Sync.)

(return for +5V,

Pin Signal (DVI-I)

16
17
18
19
20
21
22
23

24
C1
C2
C3
C4
C5

Hot Plug Detect
T. M. D. S. Data0­T. M. D. S. Data0+
T. M. D. S. Data0/5 Shield
T. M. D. S. Data5­T. M. D. S. Data5+
T. M. D. S. Clock Shield
T. M. D. S. Clock+
T. M. D. S. Clock­Analog Red
Analog Green
Analog Blue
Analog H. Sync.
Analog Ground

PRECAUTION

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 manufacturer 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.

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.

• 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.)

CAUTION

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

TIMING CHART

VIDEO

SYNC

B

D

C

F

E

A

<< Dot Clock (MHz), Horizontal Frequency (kHz), Vertical Frequency (Hz), Horizontal etc... (µs), Vertical etc... (ms) >>

Sync

Mode

10

11

12

13

14

15

16

H/V

Polarity

Sort

1

2

3

4

5

6

7

8

9

H + 31.469 800 640 16 96 48
V – 70.8 449 350 38 2 59
H – 31.468 900 720 18 108 54
V – 70.8 449 400 12 2 35

H – 37.5 840 640 16 64 120
V – 75 500 480 1 3 16
H – 43.269 832 640 56 56 80
V – 85.0 509 480 1 3 25

H – 31.469 800 640 16 96 48
V + 59.94 525 480 10 2 33
H + 37.879 1056 800 40 128 88
V + 60.317 628 600 1 4 23
H + 46.875 1056 800 16 80 160
V + 75.0 625 600 1 3 21
H + 53.674 1048 800 32 64 152
V + 85.061 631 600 1 3 27
H+/– 49.725 1152 832 32 64 224
V+/– 74.55 667 624 1 3 39
H – 48.363 1344 1024 24 136 160
V – 60.0 806 768 3 6 29
H – 60.123 1312 1024 16 96 176
V – 75.029 800 768 1 3 28
H + 68.677 1376 1024 48 96 208
V + 84.997 808 768 1 3 36
H+/– 68.681 1456 1152 32 128 144
V+/– 75.062 915 870 3 3 39
H+/– 61.805 1504 1125 18 134 200
V+/– 65.96 937 900 2 4 31
H + 63.981 1688 1280 48 112 248
V + 60.02 1066 1024 1 3 38

H + 79.976 1688 1280 16 144 248
V + 75.035 1066 1024 1 3 38

25.175

28.321

25.175

57.283

92.978

DOT

Clock

31.5

36.0

40.0

49.5

56.25

65.0

78.75

94.5

100.0

108.0

135.0

Frequency

Total Period

(E)

Video Active

Time (A)

Front Porch

(C)

Sync Duration

(D)

Back Porch

(F)

Resolution

640x350

70Hz

720x400

70Hz

640x480

75Hz

640x480

85Hz

640x480

60Hz

800x600

60Hz

800x600

75Hz

800x600

85Hz

832x624

75Hz

1024x768

60Hz

1024x768

75Hz

1024x768

85Hz

1152x870

75Hz

1152x900

65Hz

1280x1024

60Hz

1280x1024

75Hz

OPERATING INSTRUCTIONS

D

AUDIO
DC OUT

MENU

SOURCE AUTO/SET

100

100

PROCESSING

AUTO CONFIGURATION

CONTROLS LOCKED

CONTROLS UNLOCKED

FRONT VIEW REAR VIEW

Power ON/OFF Button

Power (DPMS) Indicator

Front Control Panel

MENU Button

SOURCE Button

1. SOURCE Button

• Use this button to make Dsub or DVI connector
active. This feature is used when two computers are
connected to the monitor. The default setting is Dsub.

2. MENU Button

Use this button to enter or exit the on screen display.

3.

Use these buttons to choose or adjust items in the on
screen display

Button

AUDIO DC OUT

AUTO/SET Button

Button

AUTO/SET Button

4.

Use this button to enter a selection in the on screen
display.

* AUTO adjustment function

TO the AUTO/SET button before
using OSD menu. This button is
for the automatic adjustment of the screen position, clock
and phase.
Note: Some signal from some graphics boards may not
function properly. If the results are unsatisfactory, adjust
your monitor’s Position, Clock and Phase manually.

Power Connector

DVI port

D-Sub Signal Port

Power Button

Power Indicator

<Shortcut Keys>

• Brightness and Contrast can be
adjusted directly without entering the
On Screen Display (OSD) system.
Touch the buttons to adjust
the settings and then the OSD button
to save all changes. The Brightness
and Contrast functions are also
available in the On Screen Display
(OSD) menu.

MENU, Button

5.

Press the hold the MENU button and

button for 3 seconds: the message

“CONTROLS LOCKED” appears.

You can unlock the OSD controls

at any time by pushing the MENU,

button for 3 seconds:

the message “CONTROLS UNLOCKED” will appear.

WIRING DIAGRAM

J801

P902

J710

J706

J702

CN1

CN2

J1

CN3

Connector Ass’y P/No.:
6631T1012Q

Connector Ass’y P/No.:

6631T25008R

Connector Ass’y P/No.:

6631T20015A

Connector Ass’y P/No.:

6631T20008P

DISASSEMBLY

(a)

(a)

(a)

(a)

BACK COVER REMOVAL

※ Caution: When you open the Back cover, Be careful! Dont stress the Control Board Connector.

(b)

(b)

(b)

(b)

(b)

(b)

(b)

(b)

(b)

(b) Latch Point

1) Set the Monitor face downward.

2) Remove four screws (a).

(b)

3) Set the Monitor as picture.

4) Release the bottom & side latch.

5) Set the Monitor face upward.

6) Release the up side latch.

7) Release the center positon latch.

8) Set the Monitor face downward.

9) Remove the Back cover.

D-SUB

DVI-I

Gm5020

including

(ADC / TMDS Rx )

LVDS

(LVDS823)

Memory

(KM416S102BT)

H-Sync A

V-Sync A

Micom

68HC08-BD48

M-CLK

Out - CLK

DE ,H/V Sync out

R,G,B Even/Odd

LCD Module

R,G,B
differential

LVDS:Low Voltage Differential Signaling

Data 48Bit

Address

Inverte r CTL

Module CTL

R,G,B

Inverter

Digital Signal

3.3V
Reg.

DVDD 3. 3 V
AVD D 3. 3 V

12V

Powe r CTL

V-Sync

ADC CLK

5V

2.5V

Reg.

DVDD2.5V
AVDD2.5V

3.3V
Reg.

PVDD 3 .3 V

3.3 VM

5V 5V

DVI-Analog Signal

R,G,B

H-Sync B

V-Sync B

BA7657

(Video Switch)

R,G,B

5V

H/V-Sync

Hsync

Switch

(A or B)

H-Sync A

H-Sync

H-Sync B

3.3 VM

Power Board

12V

5V

MAIN BOARD

DESCRIPTION OF BLOCK DIAGRAM (Main Board)

1. Input signal switching part.

There are two inputs which are analog and digital input.
They come from each 15 pin D-Sub and 29 pin DVI-I connector.

2. Video Controller Part.

This part amplifies the level of video signal for the digital conversion and converts from the analog video signal to
the digital video signal using a pixelclock.
The pixel clock for each mode is generated by the PLL.
The range of the pixel clock is from 25MHz to 135MHz.
This part consists of the Scaler and frame buffers which converts frame rate of input signal to 60Hz frame rate.
The Scaler gets the video signal converted analog to digital, interpolates input to1280 X 1024 resolution signal
and outputs 8-bit R, G, B signal to transmitter.
Especially pre-amp / ADC / Video controller are merged to one chip ‘Gm5020’ by Genesis.
Also FRC is separate.

3. Display Data Transmitter Part.

This part transmit digital signal from the Scaler to the receiver of module.

4. Power Part.

This part consists of the one 5V, two 3.3V and one 2.5 regulators to convert power which is provided 12V, 5V in
Power Board.
12V is provided for inverter, 5V is provided for Micom and LCD Panel.
Also, 5V is converted 3.3V and 2.5V by regulator. Converted power is provided for IC in the main board.

5. MICOM Part.

This part consists of EEPROM IC which stores control data, Reset IC and the Micom.
The Micom distinguishes polarity and frequency of the H/V sync which are supplied from signal cable.
The controlled data of each modes is stored in EEPROM.

6. Inverter

The inverter converts from DC12V to AC 700V and operate back-light lamp of module.

EMI

COMPONENTS

LINE

100 ~ 240V

INPUT RECTIFIE R

AND FILTER

ENERGY

TRANSFER

OUTPUT RECTIFI ER

AND FILTER

12V

5V

GND

SIGNAL

COLLECTION

PHOTO-COUPLER

ISOLATION

PWM CONTROL

CIRCUIT

HVDC

100KHz

PRIMARY

SECONDARY

50 ~ 60Hz

POWER BOADR

BLOCK DIAGRAM

DESCRIPTION OF BLOCK DIAGRAM

1. EMI components.

This part contains of EMI components to comply with global marketing EMI standards like FCC, VCCI CISPR,
the circuit included a line-filter, across line capacitor and of course the primary protection fuse.

2. Input rectifier and filter.

This part function is for transfer the input AC voltage to a DC voltage through a bridge rectifier and a bulk capacitor.

3. Energy Transfer.

This part function is transfer the primary energy to secondary through a power transformer.

4. Output rectifier and filter.

This part function is to make a pulse width modulation control and to provide the driver signal to power switch, to
adjust the duty cycle during different AC input and output loading condition to achive the dc output stablize, and also
the over power protection is also monitor by this part.

5. Photo-Coupler isolation.

This part function is to feed back the dc output changing status through a photo transistor to primary controller to
achive the stablized dc output voltage.

6. Signal collection.

This part function is to collect the any change from the dc output and feed back to the primary through photo
transistor

ADJUSTMENT

D

AUDIO
DC OUT

220

IBM
Compatible PC

Video Signal
Generator

PARALLEL PORT

Power inlet (required)

Power LED

ST Switch

Power Select Switch
(110V/220V)

Control Line

Not used

RS232C

PARALLEL

V-SYNC

POWER

ST

VGS

MONITOR

E

E

V-Sync On/Off Switch
(Switch must be ON.)

F

F

A

A

B

B

C

C

15

10

5

5

69

1

1

1

14

13

25

6

5V

5V

5V

4.7K

4.7K

4.7K

74LS06

74LS06

OFF ON

OFF

ON

11

All adjustment are thoroughly checked and corrected
when the monitor leaves the factory, but sometimes
several minor adjustment may be required.
Adjustment should be following procedure and after
warming up for a minimum of 10 minutes.

• Alignment appliances and tools.

- IBM compatible PC

- Programmable Signal Generator.
(eg. VG-819 made by Astrodesign Co.)

- E(E)PROM with each mode data saved.

1. Adjustment Start

1) Display any pattern at any Mode.

2) Run alignment program for LB782F on the IBM
compatible PC.

3) Select EEPROM → ALL INIT command and Enter

4) This will make all data to default state.

5) Select COMMAND → PRESET START command
and Enter.

2. Adjustment for Factory Preset Mode

1) Select DIST. ADJ → FOS DEFAULT command
and Enter.

2) It will copy all factory default data to EEPROM
automatically.

3. Adjustment for White Balance

1) Display color 0,0 pattern at Mode 15.

2) Set External Bright to MAX position and Contrast to
MAX Position.

3) Select PRESET START → BIAS CAL command
and Enter.

4) No attempt to manually adjust, BIAS data is auto­matically adjusted and saved to the EEPROM.

5) Display color 15,0 pattern at Mode 15.

6) Select DRIVE CAL command and Enter.

7) 6500K and 9300K are automatically adjusted and
saved to the EEPROM.

8) Select PRESET EXIT command and Enter.

4. Adjustment for EDID

1) Use this procedure only when there is some
probelm on EDID data.

2) Connect the D-sub cable.

3) Select EEPROM → EDID Write command and
Enter.

4) Select DDC(A) Write command and Enter.

5) Connect the DVI-I cable.

6) Select DDC(D) Write command and Enter.

Figure 1. Cable Connection