Hitachi CML154XW Schematic

SERVICE MANUAL MANUEL D'ENTRETIEN WARTUNGSHANDBUCH

CAUTION:

Before servicing this chassis, it is important that the service technician read the “Safety Precautions” and “Product Safety Notices” in this service manual.

No. 0417

CML154XW

Data contained within this Service manual is subject to alteration for improvement.

ATTENTION:

Avant d’effectuer l’entretien du châassis, le technicien doit lire les «Précautions de sécurité» et les «Notices de sécurité du produit» présentés dans le présent manuel.

VORSICHT:

Vor Öffnen des Gehäuses hat der Service-Ingenieur die „Sicherheitshinweise“ und „Hinweise zur Produktsicherheit“ in diesem Wartungshandbuch zu lesen.

Les données fournies dans le présent manuel d’entretien peuvent faire l’objet de modifications en vue de perfectionner le produit.

Die in diesem Wartungshandbuch enthaltenen Spezifikationen können sich zwecks Verbesserungen ändern.

SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT

LCD Colour Monitor

November 2002

1. 1. ELECTRICAL REQUIREMENTS................................................................................ 2

A. LCD Panel Specification............................................................................................................................ 2

B. CONTROLS ..............................................................................................................................................3

C. Power Management .................................................................................................................................. 3

D. Display Modes FOR Inspections ...............................................................................................................5

2. ADJUSTMENT CONDITIONS......................................................................................... 6

A. Measuring Apparatuses Used................................................................................................................... 6

B. Input Signal................................................................................................................................................6

C. Indication...................................................................................................................................................6

3. ADJUSTMENT OF POWER SUPPLY

...................................................................... 6

4. ADJUSTMENT OF BOARDS.......................................................................................... 7

A. Connection Method ................................................................................................................................... 7

5. DISPLAY CONTROL BOARD ........................................................................................ 9

A. Description.................................................................................................................................................9

B. Features .................................................................................................................................................... 9

C. Block Diagram (Control CKT).................................................................................................................. 10

D. Connector Locations................................................................................................................................11

E. Connector Type.......................................................................................................................................12

F. Connector pin assignment.......................................................................................................................12

6. VK-546 CONTROL PANEL BOARD............................................................................. 16

A. Description...............................................................................................................................................16

B. Connector and Switch Locations.............................................................................................................16

C. Connector type ........................................................................................................................................16

D. Connector pin Assignment ...................................................................................................................... 17

7. POWER BOARD........................................................................................................... 19

A. Description...............................................................................................................................................19

B. Electrical characteristics..........................................................................................................................19

C. Connector locations................................................................................................................................. 20

8. CIRCUIT DESCRPTION ............................................................................................... 21

A. Micro-Controller Circuit............................................................................................................................ 21

B. Circuit of Plug and Play ........................................................................................................................... 21

C. System Clock........................................................................................................................................... 21

D. Image Engine (Zoom).............................................................................................................................. 21

E. Power Regulator...................................................................................................................................... 21

9. INTRODUCTION........................................................................................................... 22

A. Front Panel Control and Led ................................................................................................................... 22

B. Rear Panel connector Input Signals......................................................................................................... 24

10. TROUBLESHOOTING............................................................................................. 25

A. Main Procedure....................................................................................................................................... 25

APPENDIX A: SCHEMATIC DIAGRAMS..........................................................................30

APPENDIX B: DISPLAY UNIT ASSEMBLY......................................................................36

APPENDIX C: PART LISTS ..............................................................................................37

1. 1. ELECTRICAL REQUIREMENTS

A. LCD Panel Specification

Display: 15 inch (15” viewable image size): active matrix: thin film transistor

(TFT): liquid crystal display (LCD): 0.297 mm dot pitch: R.G.B. Vertical stripe 200 cd//m ratio, typical

white luminance, typical: 300:1 contrast

Compatibility:

Synchronization

Frequencies:

Resolution:

Active Display Area:

Viewing Angles:

640 x 350: VGA-350

720 x 400: VGA text

640 x 400: VGA-GRAPH

640 x 480: VGA, 60Hz to 75 Hz vertical refresh rate

800 x 600: 56Hz to 75 Hz vertical refresh rate

1024 x 768 non-interlaced: 60Hz to 75 Hz vertical refresh rate

Horizontal: 24 kHz to 60 kHz

Vertical: 56 Hz to 75 Hz (1024 x 768 is up to 75 Hz)

Pixel Frequency: 21 Mhz to 78 Mhz

Horizontal: 1024 dots

Vertical: 768 lines

Horizontal: 304.1 mm

Vertical: 228.1 mm

Up 40deg down 60deg (TYP)

Hannstar

Up 45deg down 55deg (TYP)

Display Colors:

Power Supply:

Power Consumption:

Environmental:

Left 60deg, Right 60deg (TYP)

CR > 10

6-bits driver

AC 100 to 240V worldwide input, 50 / 60Hz

Typical: 25W on mode +10 / -25%

Operating temperature: 0ºC to 50ºC

Storage temperature: -20ºC to 60ºC

Storage humidity: 10%~90%

Left 65deg, Right 65deg (TYP)

CR > 10

B. CONTROLS

B-1 Control panel (monitor front panel)

1. Power LED, ( Please refer to C-2 LED definition table)

2. Adjust decrease.

3. Adjust increase

4. Function select counter-clockwise.

5. Function select clockwise.

6. Power ON/OFF switch, push to ON and push to OFF. (toggle switch)

C. Power Management

C-1 Power Management condition and status

State

On Pulses Pulses Active On On On Green Stand-by No Pulses Pulses Blanking Suspend Pulses No Pulses

Off No pulses No pulses Blacking On Yellow

DC Power off Don’t care Don’t care Don’t care Off Off

Horizontal Vertical Video Supply Circuit

Signals Power Video LCD LED

Off

Yellow

Off

C-2 LED definition Table

State LED

On mode Green

Stand-by Yellow

Suspend Yellow

Off mode Yellow

power off Dark

disconnection

C-3 Power Consumption

Meet VESA DPMS Proposal

On mode 25 Wmax Stand-by 5 Wmax

Suspend 5 Wmax

Off mode 5 Wmax DC power off 5 Wmax disconnection 5 Wmax

Measured from AC input, and not include audio at power-saving state

The stand-by, suspend and off mode recover to on mode about 3 seconds.

1. Yellow(stand-by; suspend; off mode)

2. LED Dark (power off)

D. Display Modes FOR Inspections

D-1 Supported Timing(for Not supported timing will go to power saving mode)T

TIMING

640x350

VGA-350

640x400

NEC PC9801

640x400

VGA-GRAPH

640x400

NEC PC9821

640x480

VGA-480

640x480

VESA-480-72Hz

640x480

VESA-480-75Hz

720x400

VGA-400-TEXT

800x600

SVGA

800x600

VESA-600-60Hz

800x600

VESA-600-72Hz

800x600

VESA-600-75Hz

832x624

APPLE MAC-800

1024x768

XGA

1024x768

COMPAQ-XGA

1024x768

VESA-768-70Hz

1024x768

VESA-768-75Hz

FH(KHZ)

FV(HZ)

31.469

70.087

24.83

56.42

31.469

70.087

31.5

70.15

31.469

59.94

37.861

72.809

37.5

31.469

70.087

35.156

56.25

37.879

60.317

48.077

72.188

46.875

49.725 - 1152 832 64 32 224 57.2832

74.55 - 667 624 3 1 39

48.363

60.004

53.964

66.132

56.476

70.069

60.023

75.029

SYNC

POLARITY

−

TOTAL

(DOT/LINE)

800 640 96 16 48 25.175

449 350 2 37 60

848 640 64 64 80 21.05

440 400 8 7 25

800 640 96 16 48 25.175

449 400 2 12 35

800 640 64 16 80 25.197

449 400 2 13 34

800 640 96 16 48 25.175

525 480 2 10 33

832 640 40 16 120 31.5

520 480 3 1 20

840 640 64 16 120 31.5

500 480 3 1 16

900 720 108 18 54 28.322

449 400 2 12 35

1024 800 72 24 128 36

625 600 2 1 22

1056 800 128 40 88 40

628 600 4 1 23

1040 800 120 56 64 50

666 600 6 37 23

1056 800 80 16 160 49.5

625 600 3 1 21

1344 1024 136 24 160 65

806 768 6 3 29

1328 1024 176 16 112 71.664

816 768 4 8 36

1328 1024 136 24 144 75

806 768 6 3 29

1312 1024 96 16 176 78.75

800 768 3 1 28

ACTIVE

(DOT/LINE)

SYNC

WIDTH

(DOT/LINE)

FRONT

PORCH

(DOT/LINE)

BACK

PORCH

(DOT/LINE)

PIXEL

FOREQ.

(MHZ)

2. ADJUSTMENT CONDITIONS

A. Measuring Apparatuses Used

Necessary measuring equipment that for the adjustment of LA-1221JMW’s MAIN PWB are following items.

Adjusted Video Generator.

Oscilloscope (more than 4 channels required)

DC voltmeter

B. Input Signal

Input signal by using video signal generator with VGA Card port for this adjustment.

C. Indication

Input signal by using video signal generator with VGA Card port for this adjustment.

3. ADJUSTMENT of Power Supply

Input voltage AC 100 ~ 240Vac

Rated input voltage AC 90 ~ 264Vac

Frequency 50 / 60 Hz

Rated frequency 47 ~ 63 Hz

DC output

Out voltage +12V +5V

Maximum output current +1.5A +1.5A

Minimum output current 0A +0.1A

Range of voltage Regulation

+15%~-5%

±5%

4. ADJUSTMENT OF BOARDS

Equipment is connected with boards to be inspected before adjustments. Refer to diagram below.

A. Connection Method

A-1 VL547 For AU Panel and W/O Audio.

1. R.G.B Signal Cable

2. DC Power Cable

3. LCD Lamp Cables

4. Control Cable

A-2 VL542 For Hannstar Panel W/I Audio

1. R.G.B Signal Cable

2. DC Power Cable

3. LCD Lamp Cables

4. Control Cable

5. Audio Cable

6. Speaker and Wire / Connector

5. DISPLAY CONTROL BOARD

A. Description

The VL-547 and VL-542 display control board is design to directly convert the R.G.B signals from VGA Card D-sub port to optimum LCD timing signals so as to construct a high display quality LCD monitor.

B. Features

•

On board sage chip to detect display timings and control user functions.

• Using sage chip to convert R.G.B signals to digital timing

• Using sage chip to offer full screen expansion function on non-XGA mode(Auto-Zoom).

• Support VESA DPMS function.

• Support DDC2B functions.

C. Block Diagram (Control CKT)

System Level Interface with Integrated Timing Controller ( VL-547 Diagram Hannstar Panel solution )

( VL-542 Diagram – AU Panel solution)

C-1 Sage Operation

The s9050-100 is highly-integrated display processors. It has an ADC/PLL block and a microprocessor integrated on a single chip. The cost-effective s9050-100 is suitable for the XGA and the s9050 for the SXGA market segment with smaller memory requirements. Other features include a brand new high-end scaler, Active Color Management, a flexible OSD, Autoadjust, SureSync

and independent monitoring of the analog interface. A new standalone

on-chip pattern generator has been incorporated to simplify the manufacture of monitors.

D. Connector Locations

( VL-547 Control Board for AU Panel solution )

( VL-542 Control Board for Hannstar Panel solution )

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