Hitachi CML170SXWPLUS 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. 0418

CML170SXWBPlus

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

December 2001

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

A. LCD Panel Specification.................................................................................1

B. Controls..........................................................................................................2

C. Power Management.......................................................................................2

D. Display Modes for Inspections........................................................................3

E. Dot Defects & Audio Specification..................................................................4

2. MAIN / DISPLAY CONTROL BOARD - VL-705 .........................5

A. Description.....................................................................................................5

B. Features .........................................................................................................5

C. Block Diagram (Control Circuit)......................................................................5

D. Connector Locations......................................................................................6

E. Connector Type..............................................................................................6

F. Connector Pin Assignment.............................................................................6

3. CONTROL PANEL AND AUDIO CONTROL

(KEY BOARD) - VK-517......8

A. Description.....................................................................................................8

B. Connector and Switch Locations....................................................................8

C. Connector Type .............................................................................................9

D. Connector Pin Assignment.............................................................................9

4. POWER AND AUDIO BOARD - VM-517....................................11

A. Major Specification.........................................................................................11

B. Description.....................................................................................................11

C. Electrical Characteristics................................................................................11

D. Connector Location........................................................................................11

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

F. Connector Pin Assignment.............................................................................12

5. INVERTER BOARD - AMBIT T51I036.00 ..................................13

A. Description.....................................................................................................13

B. Electrical Characteristics................................................................................13

C. Connector Locations......................................................................................16

D. Connector Pin Assignment.............................................................................16

6. AC ADAPTER (LSE9901B1260) ................................................17

A. Specification Review ..................................................................................... 17

7. CIRCUIT DESCRIPTION ............................................................17

A. Display Controller...........................................................................................17

B. Plug and Play Circuit......................................................................................17

C. System Clock.................................................................................................17

D. Power Regulator............................................................................................17

8. INTRODUCTION.........................................................................18

A. Front Panel Controls and LED........................................................................18

B. Rear Panel Connectors..................................................................................19

9. TROUBLESHOOTING................................................................20

A. Main Procedure..............................................................................................20

B. Power Troubleshooting ..................................................................................21

C. Backlight Troubleshooting..............................................................................22

D. Performance Troubleshooting........................................................................23

E. Function Troubleshooting...............................................................................24

APPENDIX A: REPLACEMENT PARTS LISTS ............................25

1. ELECTRICAL REQUIREMENTS

A. LCD Panel Specification

Display: 17 inch (17” viewable image size): active matrix: thin film transistor

(TFT): liquid crystal display (LCD): 0.264 mm dot pitch: RGB Vertical stripe 200 cd/m ratio, Min.

white luminance, typical: 200:1 contrast

Compatibility:

Synchronisation

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

1,024 x 768 non-interlaced: 60Hz to 75 Hz vertical refresh rate

1,280 x 1,024 non-interlaced: 60~75Hz vertical refresh rate

Horizontal: 24~80KHz

Vertical: 56~75Hz

Pixel Frequency: 25~135 MHz

Horizontal: 1,280 dots

Vertical: 1,024 lines

Horizontal: 337.92 mm

Vertical: 270.34 mm

Up 40º, Down 80º (typical)

Display Colours:

Power Supply:

Power Consumption:

Environmental:

Left 60º, Right 80º (typical)

CR ≥ 10

16,777,216 (with FRC)

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

Typical: 50W on mode +10 / -25%

Operating temperature: 0~50ºC

Storage temperature: -20~65ºC

Relative Humidity: 20~80%

B. CONTROLS

B-1 Control Panel (Monitor Front Panel)

1. Power LED.

2. Adjust decrease.

3. Adjust increase.

4. Function select anti-clockwise.

5. Function select clockwise.

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

7. Ear-phone jack.

8. Volume Control.

C. Power Management

C-1 Power Management

1. Meets VESA DPMS Proposal

2. Power Consumption

Meets VESA DPMS Proposal

On-mode 54 W

Stand-by 5 W

Suspend 5 W

Off-mode 5 W

DC power off 5 W

Disconnection 5 W

 Power saving states are measured with speakers attached but not working.  The recovery time from stand-by/suspend/off-mode to on-mode is 3 seconds maximum.

Green

max

Yellow

max

Yellow

max

Yellow

max

Dark

max

Dark (DC power off) Yellow (DC power on)

C-2 Power Consumption

Meets VESA DPMS Proposal

On-mode 54 W

Stand-by 5 W

Suspend 5 W

Off-mode 5 W

DC power off 5 W

Disconnection 5 W

1. Measured from AC input end of AC power adapter.

2. Power saving states are measured with speakers attached but not worked.

max

D. Display Modes for Inspections

D-1 Supported Timing

TIMING

640x350 31.469 VGA-350 70.087 640x400 31.469 VGA-GRAPH 70.087 640x400 31.5 NEC PC9821 70.15 640x480 31.469 VGA-480 59.94 640x480 35 APPLE MAC-480 66.67 640x480 37.861 VESA-480-72Hz 72.809 640x480 37.5 VESA-480-75Hz 75 720x400 31.469 VGA-400-TEXT 70.087 832x624 49.725 APPLE MAC-800 74.55 800x600 35.156 SVGA 56.25 800x600 37.879 VESA-600-60Hz 60.317 800x600 48.077 VESA-600-72Hz 72.188 800x600 46.875 VESA-600-75Hz 75 1024x768 48.363 XGA 60.004 - 806 768 6 3 29 1024x768 53.964 COMPAQ-XGA 66.132 1024x768 56.476 VESA-768-70Hz 70.069 1024x768 60.023 VESA-768-75Hz 75.029 1024x768 60.24 APPLE MAC-768 75.02 1280x1024 64 VESA-1024-60Hz 60 1280x1024 80 VESA-1024-75Hz 75

FH (KHZ) SYNC TOTAL ACTIVE SYNC FRONT BACK PIXEL

FV (HZ) POLARITY (DOT/LINE) (DOT/LINE)

+ + + + + + + +

+ +

+ + + +

800 640 96 16 48 25.175 449 350 2 37 60 800 640 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 24 128 31.5 520 480 3 9 28 832 640 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

1152 832 64 32 224 57.2832

667 624 3 1 39

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

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

1328 1024 96 32 176 80

803 768 3 3 29 1688 1280 112 48 248 108 1066 1024 3 1 38 1688 1280 144 16 248 135 1066 1024 3 1 38

WIDTH

(DOT/LINE)

PORCH

(DOT/LINE)

PORCH

(DOT/LINE)

FOREQ.

(MHZ)

If the input timing is not a supported timing listed above but within the supported frequency range (Horizontal: 80KHz, Vertical: 85Hz), this monitor will select a closest mode instead. However, the display quality may not be optimised.

E. Dot Defects & Audio Specification

E-1 Dot Defects on LCD Panel

Visual Defect

Electrical Defect

Foreign Material

Bubble

Scratch

Bright Line

Dark Line

Bright Dot None Double Bright Dot Three Bright Dots None Dark Dot Double Dark Dot Three Dark Dots Distance of B/D to B/D Distance of D/D to D/D

0.1=<D=<1.0

D=<1.0 N=<6

0.01=<W=<0.1

0.3=<L=<7 N=<4

0.05=<W=<0.1

0.3=<L=<7

N=<4

N=<2

N=<10 N=<3 N=<1 S>=10mm S>=5mm

Note:

W : Width (mm)

L : Length (mm) D : Diameter (mm) N : Number (pcs)

B/D: Bright Dot D/D: Dark Dot

E-2 Audio Specifications

Conditions 1KHz, volume max, Load 8W speakers x2 Audio Input 500mV Audio Output 2x 0.5W Frequency Response 50Hz to 20KHz ±3dB S/N Ratio -70dB max Cross Talk -40dB max Distortion 1% max

rms

max

2. MAIN / DISPLAY CONTROL BOARD - VL-706

A. Description

The VL-706 display control board is design to directly convert analog RGB signals from a standard VGA display card to optimum LCD timing signals so as to construct a high display quality LCD monitor.

B. Features

•

On-board embedded micro-processor to detect display timings and control user functions.

• Uses Pixelworks design to generate optimum LCD timings.

• Uses EEPROM to memorise every adjusted parameter.

• Supports up to 22 display modes from VGA to SXGA.

• Offers full screen expansion function on non-SXGA mode (automatic).

• Flexible colour temperature selection function including 9300º, 6500º and user mode.

• Supports OSD functions.

• Supports VESA DPMS function.

• Supports DDC1/2B functions.

• Supports 5 languages for OSD description.

• The longest time for mode change is 3 seconds.

C. Block Diagram

D. Connector Locations

E. Connector Type

Location Type Maker Number of Pins

CN2 1211-15 E&T 15

CN1 74320-1004 FEMALE 30

CN8 96113-1203 E&T 12

CN3 96113-0513 E&T 5

CN7 96113-1003 E&T 10

CN4 96118-0413 E&T 4

CN5 98210-3011 E&T 30

F. Connector Pin Assignment

F-1 CN2

Pin No. Signal Comment

1 R-Video Red Video Input. 2 G-Video Green Video Input. 3 B-Video Blue Video Input. 4 NC 5 PCDETECT PCDETECT Input. 6 Ground Ground. 7 Ground Ground. 8 Ground Ground 9 5VCC DDC Power Input. 10 Ground Ground. 11 NC 12 SDA DDC 1/2B 13 HS Horizontal Sync Input. 14 VS Vertical Sync Input.

15 SCL DDC 2B

F-2 CN5

Terminal No. Symbol Function

28,29,30 VDD 5V POWER SUPPLY

1 TXE0- LVDS EVEN OUTPUT DATA PAIRS

2 TXE0+ LVDS EVEN OUTPUT DATA PAIRS

3 TXE1- LVDS EVEN OUTPUT DATA PAIRS

4 TXE1+ LVDS EVEN OUTPUT DATA PAIRS

5 TXE2- LVDS EVEN OUTPUT DATA PAIRS

6 TXE2+ LVDS EVEN OUTPUT DATA PAIRS

8 TXECLK- LVDS EVEN OUTPUT DATA PAIRS

9 TXECLK+ LVDS EVEN OUTPUT DATA PAIRS

10 TXE3- LVDS EVEN OUTPUT DATA PAIRS

11 TXE3+ LVDS EVEN OUTPUT DATA PAIRS

12 TXO0- LVDS ODD OUTPUT DATA PAIRS

13 TXO0+ LVDS ODD OUTPUT DATA PAIRS

15 TXO1- LVDS ODD OUTPUT DATA PAIRS

16 TXO1+ LVDS ODD OUTPUT DATA PAIRS

18 TXO2- LVDS ODD OUTPUT DATA PAIRS

19 TXO2+ LVDS ODD OUTPUT DATA PAIRS

20 TXOCLK- LVDS ODD OUTPUT DATA PAIRS

21 TXOCLK+ LVDS ODD OUTPUT DATA PAIRS

22 TXO3- LVDS ODD OUTPUT DATA PAIRS

23 TXO3+ LVDS ODD OUTPUT DATA PAIRS

7,14,17,24 GND Ground

25,26,27 GND Ground

F-3 CN1

Pin Signal Assignment Pin Signal Assignment Pin Signal Assignment

1 TMDS Data2- 9 TMDS Data1- 17 TMDS Data02 TMDS Data2+ 10 TMDS Data1+ 18 TMDS Data0+ 3 TMDS Data2/4 Shield 11 TMDS Data1/3 Shield 19 TMDS Data0/5 Shield 4 TMDS Data4- 12 TMDS Data3- 20 TMDS Data55 TMDS Data4+ 13 TMDS Data3+ 21 TMDS Data5+ 6 DDC Clock 14 +5V Power 22 TMDS Clock Shield 7 DDC Data 15 PC DETECT 23 TMDS Clock+ 8 Not Connect 16 Hot Plug Detect 24 TMDS Clock-

F-4 CN8

Pin No. Signal Comment

1,2,3 12 VCC Inverter Power Output.

4 BLON Bright Light ON/OFF.

5,6,10,11,12 GND GND

7,8 5 VCC Inverter Power Output.

9 BRIGHT Brightness Adjustment.

F-5 CN4

Pin No. Signal Comment

1 12 VCC 12 VCC Power Input

2 5 VCC 5V Power Input

3 GND GND

4 GND GND

F-6 CN7

Pin No. Signal Comment

1 MUTE Volume ON/OFF control

2 LED-Y Power saving mode

3 LED-G Monitor is ON

4 GND GND

5 KEY-UP Function select anti-clockwise key

6 KEY-DOWN Function select anti-clockwise key

7 KEY-R Adjust up key

8 KEY-L Adjust down key

9 KEY-POWER Power ON/OFF key

10 GND GND

3. CONTROL PANEL AND AUDIO CONTROL (KEY BOARD) VK-517

A. Description

The VK-517 is designed to offer a user interfaced control panel that passes and receives signals to and from VL-706 display control board. Also there is a stereo audio amplifier to drive a pair of speakers. When in power saving mode, the audio circuit can be turned off by the control signal from VL-706 board.

B. Connector and Swi t ch Locati ons

C. Connector Type

Location Type Maker Number of Pins

J1 96113-1113 E&T 11

J2 SCJ-0348-C SC 9

J3 87502-0200 ACES 2

J4 87502-0200 ACES 2

J5 96113-1013 E&T 10

D. Connector Pin Assignment

D-1 J1

Pin No. Signal Comment

1 VOL Volume ON/OFF control

2 GND GND

3 RIN1 Audio volume adjust line INR

4 LIN1 Audio volume adjust line INL

5 RIN2 Audio volume adjust line OUTR

6 LIN2 Audio volume adjust line OUTL

7 GND GND

8 R-EAR EAR phone out R

9 L-EAR EAR phone out L

10 ROUT Speaker out R

11 LOUT Speaker out L

D-2 J5

Pin No. Signal Comment

1 MUTE Volume ON/OFF control

2 LED-Y Power saving mode.

3 LED-G Monitor on mode.

4,10 GND GND

5 KEY-UP Function select up to VL-706

6 KEY-DOWN Function select down to VL-706

7 KEY-R Function select right to VL-706

8 KEY-L Function select left to VL-706

9 KEY-PWR Power ON/OFF signal to VL-706

D-3 J3 and J4

Pin No. Signal Comment

1 GND GND

2 OUTL (OUTR) Speaker Out

D-4 J2

Pin No. Signal I/O Comment

1 GND Ground

2 LI 2 Earphone out L

3 RI 2 Earphone out R

4 LI 1 Earphone out L

5 LO Speaker out L

6 NC Not connected

7 RI 1 Earphone out R

8 RO Speaker out R

D-5 Switch Definition

Location Definition

S1 Power ON/OFF

S2 Function select by clockwise direction

S3 Function select by anti-clockwise direction

S4 Adjust up

S5 Adjust down

D-6 LED Definition

Location Definition

D1 Green for ON-mode; Dark for DC power off; Yellow for stand-by; suspend; off-mode.

D-7 Variable Resistor

VR1: Volume control, clockwise for increasing; anti-clockwise for decreasing

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