TCL LA560A-1 Schematic

TCL LA560A-1

SERVICE MANUAL

TCL MONITOR

LA560A-1

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

OFTHIS INFORMATION AFTER THE DATE OF PUBLICATION AND DISCLAIMS RELIABILITY FOR CHANGES,

ERRORS OR OMISSIONS.

MANUFACTURE DATA ：Mar-30-2005

Page 1 of 47

TCL LA560A-1

Table Contents

TABLE CONTENTS......................................................................................................................................................... 2

REVISION LIST ............................................................................................................................................................... 4

1. MONITOR SPECIFICATIONS ..................................................................................................................................... 5

2. LCD MONITOR DESCRIPTION .................................................................................................................................. 6

3. OPERATING INSTRUCTIONS .................................................................................................................................... 7

3.1 GENERAL INSTRUCTIONS................................................................................................................................... 7

3.2 CONTROL BUTTON............................................................................................................................................... 7

3.3 ADJUSTING THE PICTURE................................................................................................................................... 7

4. INPUT/OUTPUT SPECFICATION ............................................................................................................................... 9

4.1 INPUT SIGNAL CONNECTOR ............................................................................................................................... 9

4.2 FACTORY PRESET DISPLAY MODES： ............................................................................................................ 10

4.3 POWER SUPPLY FEATURES ................................................................................................................................. 10

4.4 PANEL SPECIFICATION ...................................................................................................................................... 10

4.4.1 General Description ....................................................................................................................................... 10

4.4.2 DISPLAYS CHARACTERISTICS....................................................................................................................11

4.4.3 OPTICAL CHARACTERISTICS......................................................................................................................11

4.4.4 Backlight unit.................................................................................................................................................. 12

5. BLOCK DIAGRAM .................................................................................................................................................... 13

5.1 SOFTWARE FLOW CHART ................................................................................................................................. 13

5.2 MONITOR EXPLODED VIEWING ...................................................................................................................... 14

5.3 ELECTRICAL BLOCK DIAGRAM....................................................................................................................... 145

5.3.1 SCALAR BOARD BLOCK DIAGRAM............................................................................................................ 15

5.3.2 INVERTER/POWER BOARD BLOCK DIAGRAM ......................................................................................... 16

6.SCHEMATIC ............................................................................................................................................................... 18

6.1 MAIN BOARD ....................................................................................................................................................... 18

6.2 POWER BOARD................................................................................................................................................... 24

7. PCB LAYOUT ............................................................................................................................................................ 26

7.1 MAIN BOARD ....................................................................................................................................................... 26

7.2 POWER BOARD ....................................................................................................................................................... 26

8. MAINTAINABILITY.................................................................................................................................................... 27

8.1 EQUIPMENT AND TOOLS REQUIREMENT........................................................................................................ 27

8.2 TROUBLE SHOOTING......................................................................................................................................... 28

8.2.1 MAIN BOARD ................................................................................................................................................ 29

8.2.2 KEYPAD BOARD........................................................................................................................................... 31

8.2.3 POWER/INVERTER BOARD ........................................................................................................................ 32

Page 2 of 47

TCL LA560A-1

9 WHITE-BALANCE, LUMINANCE ADJUSTMENT .................................................................................................... 34

10. EDID CONTENT ...................................................................................................................................................... 35

11. BOM LIST ................................................................................................................................................................ 36

Page 3 of 47

Revision List

Revision Date Change Description

TCL LA560A-1

Page 4 of 47

1. MONITOR SPECIFICATIONS

Monitor Modes TCL LA560A-1

Type 15.0”TFT

MAX DISPLAY AREA 304.128mm×228.096mm(W×H)

MAX RESOLUTION 1024×768(W×H)

DOT PITCH 0.099mm×0.297mm(W×H)

PIXEL PITCH 0.297mm×0.297mm(W×H)

COLOUR 16,777,216 (6Bit)

TCL LA560A-1

VIEWING ANGLE

CONTRAST

BRIGHTNESS 250cd/m

RESPONSE TIEM 25ms

HORIZONTAL FREQUENCY

VERTICAL FREQUENCY

INPUT SIGNAL

Signal Standard VESA DPMS

Drug & play VESA DDC2B

Picture control OSD

Power Consumption

Power AC220V

Weight 3kg

Dimension

Operating temperature

Max 25W（in save modes less than 3W）

356mm×150mm×355mm（W×D×H）

UP/ DOWN 40°/ 60°

LEFT/ RIGHT 60°/ 60°

RBG ANALOG（D-sub15）

400：1

30～60kHz

55～75 Hz

5℃～35℃

Operating humidity

Storing temperature

Storing humidity

10％～85％

-20℃～60℃

5％～85％

Page 5 of 47

TCL LA560A-1

2. LCD MONITOR DESCRIPTION

The LCD MONITOR will contain a main board, a power board and a keypad board which house the flat panel control

logic, brightness control logic and DDC.

The power board will provide AC to DC Inverter voltage to drive the backlight of panel and the main board chips each

voltage.

PWPC Board

(Include Adapter, Inverter)

AC-IN

100V-240V

Monitor Block Diagram

CCFL Drive.

Keyboard

Flat Panel and

CCFL backlight

Main Board

HOST Computer

RS232 Connector

For white balance

adjustment in factory

mode

Video signal, DDC

Page 6 of 47

TCL LA560A-1

3. OPERATING INSTRUCTIONS

3.1 GENERAL INSTRUCTIONS

Press the power button to turn the monitor on or off. The other control buttons are located at the front of the monitor. By

changing these settings, the picture can be adjusted to your personal preferences.

The power cord should be connected.

Connect the video cable from the monitor to the video card.

Press the power button to turn on the monitor, the power indicator will light up.

3.2 CONTROL BUTTON

①

②

③

④

⑤

Item Description

① AUTO/EXIT

②

③

④ MENU

⑤ ・LED Indication ・indicate the condition of power

⑥ ・Power ・Turn the monitor ON or OFF

・Brightness ・< ・Contrast ・＞

3.3 ADJUSTING THE PICTURE

・Auto configuration (contains CLOCK,PHASE,H

POSITION,V POSITION)

・Exit OSD or back to previous menu ・Hot key to Brightness Adjust

Move the cursor to left

・・Hot key to Contrast Adjust

Move the cursor to right

・・Enter the OSD main menu ・Select Function or select Sub menu

or Decrease value

or Increase value

Page 7 of 47

The description for control function:

Item Sub items Description

TCL LA560A-1

Luminance

Image Setup

Image Position

Color Temp

Auto Config N/A Auto Config

OSD Setup

Contrast

Brightness

Adjust the screen Contrast。

Adjust the screen Brightness。

Adjust Picture Phase to reduce

Focus

Horizontal-Line noise

Adjust picture Clock to reduce Vertical-Line

Clock

noise

H. Position Adjust the horizontal position of the picture

V. Position Adjust the vertical position of the picture

Recall Warm Color Temperature from

N/A Warm

EEPROM

Recall Cool Color Temperature from

N/A Cool

EEPROM

N/A User Red Gain from Digital-register.

Auto configuration contains Clock、Focus、

H. Position、V. Position

H. Position Adjust the horizontal position of the OSD.

V. Position Adjust the vertical position of the OSD.

OSD Timeout Adjust the OSD timeout.

Language N/A Language OSD language selection

Show the resolution, H/V frequency and input

Information N/A Information

port of current input timing.

Reset N/A Reset Reset to the factory preset mode

Exit N/A Exit Set and save and then quit the OSD

Page 8 of 47

4. INPUT/OUTPUT SPECFICATION

4.1 INPUT SIGNAL CONNECTOR

PIN NO. DESCRIPTION PI N NO. DESCRIPTION

1. Red Video 9. +5 v

2. Green Video 10. Logic Ground

3. Blue Video 11. RS-232 RX

4. RS-232 TX 12. DDC-Serial Data

5. DDC-Return 13. H-Sync.

6. Red Ground 14. V-Sync.

7. Green Ground 15. DDC-Serial Clock

8. Blue Ground

VGA Connector layout

11 15

TCL LA560A-1

Page 9 of 47

4.2 FACTORY PRESET DISPLAY MODES：

VESA MODES

TCL LA560A-1

Mode Resolution Total

640x480@60Hz 800 x 525 31.469 59.940 25.175

VGA

SVGA

XGA

Mode Resolution Total

DOS 720x400@70Hz 900 x 449 31.469 70.087 28.322

640x480@72Hz 832 x 520 37.861 72.809 31.500

640x480@75Hz 840 x 500 37.500 75.00 31.500

800x600@56Hz 1024 x 625 35.156 56.250 36.000

800x600@60Hz 1056 x 628 37.879 60.317 40.000

800x600@72Hz 1040 x 666 48.077 72.188 50.000

800x600@75Hz 1056x625 46.875 75.000 49.500

1024x768@60Hz 1344x806 48.363 60.004 65.000

1024x768@70Hz 1328x806 56.476 70.069 75.000

1024x768@75Hz 1312x800 60.023 75.029 78.750

Horizontal Frequency

+/- 0.5kHz

IBM MODES

Horizontal Frequency

+/- 0.5kHz

Vertical Frequency

+/- 1 Hz

Vertical Frequency

+/- 1 Hz

Nominal Pixel

Clock (MHz)

Nominal Pixel

Clock (MHz)

DOS 640x350@70Hz 800 x 449 31.469 70.087 25.175

XGA 1024x768@72Hz 1304x798 57.515 72.100 75.000

MAC MODES

VGA 640x480@67Hz 864x525 35.000 66.667 30.240

SVGA 832x624@75Hz 1152x667 49.725 74.551 57.2832

XGA 1024x768@75Hz 1328x804 60.241 74.927 80.000

4.3 POWER SUPPLY Features

A/C Line voltage range : 100 V ~ 240 V

A/C Line frequency range

Current : 0.6A max. at 100V , 0.35A max. at 240 V <0.3A

Peak surge current : < 55A peak at 240 VAC and cold starting

Leakage current : < 3.5mA

: 50 ± 3Hz, 60 ± 3Hz

4.4 PANEL SPECIFICATION

4.4.1 General Description

Page 10 of 47

4.4.2 DISPLAYS CHARACTERISTICS

The following items are characteristics summary on the table under 25 ℃ condition:

TCL LA560A-1

4.4.3 OPTICAL CHARACTERISTICS

The optical characteristics are measured under the conditions as follows: Ta=25℃, Vcc=3.3V, IBL=7.5mArms/lamp,

Display mode: XGA, Horizontal cycle=48.363KHz, Vertical cycle=60.000Hz.

Page 11 of 47

TCL LA560A-1

4.4.4 Backlight unit

Page 12 of 47

5. BLOCK DIAGRAM

5.1 SOFTWARE FLOW CHART

TCL LA560A-1

(1)

(2)

(3)

(4)

(5)

(6)

(7)

1) Initialize MCU settings, including I/O, Timer,

ISR and Serial Port settings.

2) Read EEPROM content to recover monitor

settings, including brightness, contrast, color

temperature and OSD position etc.

3) Initialize system variable, including system

flag, OSD timeout counter, burin mode

status… etc.

4) Initialize OSD menu variable for user operation

5) Initialize device on the board, now only MST

scalar chip will be initialized

6) Check if system is in power off status from first

AC power up. If yes, then go to 7, else go to 8.

7) If yes, system will be forced to enter power off

status Mode detection

8) Check if input timing has been changed, if yes

(8)

(9)

(11)

(12)

(10)

then go to 10, else go to 11

9) Setup MST scalar for display according input

timing

10) OSD handler for OSD operation.

11) Debug handler, only debug only

Page 13 of 47

5.2 Monitor Exploded Viewing

BU1527

Page 14 of 47

5.3 ELECTRICAL BLOCK DIAGRAM

5.3.1 SCALAR BOARD BLOCK DIAGRAM

BU1527

Crystal

24MHz

MCU

W78E65P-40

OSD Control Interface

(Keypad)

LCD Interface (LVDS)

Scalar

TSU16AK-LF

(Include ADC，OSD)

RXD

TXD

D-Sub Connector

RGB

Crystal

14.31818 MHz

EEPROM

Page 15 of 47

DB15_SDA

DB15_SCL

+ 32 hidden pages