Hitachi CML158XW, CML156XW 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. 0421

«MODEL NAMES»

CML156XW CML158XW

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 2003

SAFETY PRECAUTIONS

WARNING: The following precautions must be observed.

ALL PRODUCTS

Before any service is performed on the chassis an isolation transformer should be inserted between the power line and the product.

1. When replacing the chassis in the cabinet, ensure all the protective devices are put back in place.

2. When service is required, observe the original lead dressing. Extra precaution should be taken to ensure correct lead dressing in any high voltage circuitry area.

3. Many electrical and mechanical parts in HITACHI products have special safety related characteristics. These characteristics are often not evident from visual inspection, nor can the protection afforded by them necessarily be obtained by using replacement components rated for higher voltage, wattage, etc. Replacement parts which have these special safety characteristics are identified by marking with a

! on the schematics and the replacement parts list. The use of a substitute replacement component that does not have the same safety characteristics as the HITACHI recommended replacement one, shown in the parts list, may create electrical shock, fire, X-radiation, or other hazards.

4. Always replace original spacers and maintain lead lengths. Furthermore, where a short circuit has occurred, replace those components that indicate evidence of overheating.

5. Insulation resistance should not be less than 2M ohms at 500V DC between the main poles and any accessible metal parts.

6. No flashover or breakdown should occur during the dielectric strength test, applying 3kV AC or

4.25kV DC for two seconds between the main poles and accessible metal parts.

7. Before returning a serviced product to the customer, the service technician must thoroughly test the unit to be certain that it is completely safe to operate without danger of electrical shock. The service technician must make sure that no protective device built into the instrument by the manufacturer has become defective, or inadvertently damaged during servicing.

CE MARK

1. HITACHI products may contain the CE mark on the rating plate indicating that the product contains parts that have been specifically approved to provide electromagnetic compatibility to designated levels.

2. When replacing any part in this product, please use only the correct part itemised in the parts list to ensure this standard is maintained, and take care to replace lead dressing to its original state, as this can have a bearing on the electromagnetic radiation/immunity.

PICTURE TUBE

1. The line output stage can develop voltages in excess of 25kV; if the E.H.T. cap is required to be removed, discharge the anode to chassis via a high value resistor, prior to its removal from the picture tube.

2. High voltage should always be kept at the rated value of the chassis and no higher. Operating at higher voltages may cause a failure of the picture tube or high voltage supply, and also, under certain circumstances could produce X-radiation levels moderately in excess of design levels. The high voltage must not, under any circumstances, exceed 29kV on the chassis (except for projection Televisions).

3. The primary source of X-radiation in the product is the picture tube. The picture tube utilised for the above mentioned function in this chassis is specially constructed to limit X-radiation. For continued X-radiation protection, replace tube with the same type as the original HITACHI approved type

4. Keep the picture tube away from the body while handling. Do not install, remove, or handle the picture tube in any manner unless shatterproof goggles are worn. People not so equipped should be kept away while picture tubes are handled

LASERS

If the product contains a laser avoid direct exposure to the beam when the cover is open or when interlocks are defeated or have failed.

1. ELECTRICAL REQUIREMENTS

1.1 LCD Panel Specification ...................................................................................................................... 2

1.2 Input Signals ........................................................................................................................................ 7

1.3 Supported Timing ................................................................................................................................ 8

1.4 Power Management............................................................................................................................. 9

1.5 Plug & Play .......................................................................................................................................... 9

1.6 External Connection ............................................................................................................................ 9

2. ADJUSTMENT OF POWER SUPPLY

3. VL-563 DISPLAY CONTROL BOARD

3.1 Description......................................................................................................................................... 11

3.2 Features............................................................................................................................................. 11

3.3 BLOCK DIAGRAM............................................................................................................................. 12

3.4 Connector Locations.......................................................................................................................... 12

3.5 Connector Type ................................................................................................................................. 13

3.6 Connector pin assignment ................................................................................................................. 13

4. VK-580 CONTROL PANEL AND AUDIO BOARD (CML158XW)

4.1 Description......................................................................................................................................... 16

4.2 Electrical characteristics (Tamb=25°)................................................................................................ 16

4.3 Connector type .................................................................................................................................. 16

4.4 Connector pin Assignment ................................................................................................................ 17

4.5 Switch definition................................................................................................................................. 18

4.6 LED definition .................................................................................................................................... 18

4.7 Variable resistor................................................................................................................................. 18

5. VK-570 CONTROL PANEL (CML156XW)

5.1 Description......................................................................................................................................... 19

5.2 Connector pin Assignment ................................................................................................................ 19

5.3 Switch definition................................................................................................................................. 19

5.4 LED definition .................................................................................................................................... 19

6. VP-570 POWER BOARD

6.1 Description......................................................................................................................................... 20

6.2 Features............................................................................................................................................. 20

6.3 Interface Signals ................................................................................................................................ 20

6.4 Electrical Specification:...................................................................................................................... 21

6.5 Isolation Check .................................................................................................................................. 23

6.6 Environmental.................................................................................................................................... 24

7. INTRODUCTION

7.1 Front Panel Control and Led.............................................................................................................. 25

7.2 Rear Panel connector Input Signals .................................................................................................. 27

8. TROUBLESHOOTING

8.1 Main Procedure ................................................................................................................................. 28

APPENDIX A: DISPLAY UNIT ASSEMBLY......................................................................33

1. ELECTRICAL REQUIREMENTS

1.1 LCD Panel Specification

1.1.1 LCD Panel Model (HSD150SX84-C)

• Display Type Active matrix colour TFT LCD

• Resolution 1024 x 768 pixels

• Display Dot 1024 x (RGB) x 768

• Display Area 304.1mm (H) x 228.1mm (V)

• Pixel Pitch 0.297mm (H) x 0.297mm (V)

• Display Colour 262,144

(Monitor display colour 16.7M with FRC or dithering)

• Maximum Brightness 250 cd/m

(6mA for each lamp after 30 min.)

• Contrast Ratio 400:1 typ.

• Response Time (Tr+Tf) 35ms typ

• Lamp Voltage 660Vrms typ.

• Lamp Current 3~7mA rms. typ. x 2 (Lamp)

• View Angle (Hor./Ver.) 65°(L), 65°(R) / 45°(H), 55°(L). typ.

• Uniformity =(Bmin/Bmax)x100% 70% min.

Bmax: Maximum Brightness

Bmin: Minimum Brightness

• Weight 950g. typ.

typ.

(Contrast Ratio ≥ 10)

1.1.2 Optical Characteristics

Measuring Condition

■ Measuring surroundings : dark room

■ Lamp current I

■ V

■ Surrounding temperature : 25 ±2°C

■ 30min. Warm-up time.

=3.3V, fv =60Hz, f

DD1

Measuring Equipment

■ LCD-7000 (Otsuka Electric Corp.) utilises MCPD-7000 for Chromaticity and BM-5A for

other optical characteristics.

■ Measuring spot size : 10~12mm

Optical Specification

: (6.0) ±0.1mA, Lamp freq. FL =50KHz

=32.5MHz

DCLK

JS555-E26

Note (1) Definition of Viewing Angle:

Note (2) Definition of Contrast Ratio (CR): Measured at the centre point of panel

Luminance with all pixels white (L63)

CR = ———————————————

Luminance with all pixels white (L0)

Note (3) Definition of Response Time: Sum of TR and TF

Note (4) Optical Characteristic Measurement Setup

Note (5) Definition of Brightness Uniformity

1.2 Input Signals

1.2.1 Video Input

• Type Analog RGB.

• Input Impedance 75 ohm ± 2%

• Polarity Positive

• Amplitude 0 - 0.7 ± 0.05 Vp-p

• Display Colour same as LCD panel

1.2.2 Sync Input

• Signal separate horizontal and vertical sync.

• Polarity positive and negative.

1.2.3 Interface Frequency

which are TTL compatible, composite sync(H+V)

The following frequency range is generalised by supported timing. If the entered

mode does not match the supported timing the display optimisation will not be assured.

• Horizontal Frequency 24KHz ---61KHz

• Vertical Frequency 49Hz -------75Hz

1.3 Supported Timing

TIMING FH(KHZ)

FV(HZ)

31.469 + 800 640 96 16 48 25.175 640x350

VGA-350

NEC PC9801

VGA-GRAPH

NEC PC9821

VGA-480

VESA-480-72Hz

VESA-480-75Hz

VGA-400-TEXT

SVGA

VESA-600-60Hz

VESA-600-72Hz

VESA-600-75Hz

XGA

COMPAQ-XGA

VESA-768-70Hz

VESA-768-75Hz

APPLE MAC-800

VESA-PAL

70.087 − 449 350 2 37 60

24.83 − 848 640 64 64 80 21.05 640x400

56.42 − 440 400 8 7 25

31.469 − 800 640 96 16 48 25.175 640x400

70.087 + 449 400 2 12 35

31.5 − 800 640 64 16 80 25.197 640x400

70.15 − 449 400 2 13 34

31.469 − 800 640 96 16 48 25.175 640x480

59.94 − 525 480 2 10 33

37.861 − 832 640 40 24 128 31.5 640x480

72.809 − 520 480 3 9 28

37.5 − 840 640 64 16 120 31.5 640x480

75 − 500 480 3 1 16

31.469 − 900 720 108 18 54 28.322 720x400

70.087 + 449 400 2 12 35

35.156 + 1024 800 72 24 128 36 800x600

56.25 + 625 600 2 1 22

37.879 + 1056 800 128 40 88 40 800x600

60.317 + 628 600 4 1 23

48.077 + 1040 800 120 56 64 50 800x600

72.188 + 666 600 6 37 23

46.875 + 1056 800 80 16 160 49.5 800x600

75 + 625 600 3 1 21

48.363 − 1344 1024 136 24 160 65 1024x768

60.004 − 806 768 6 3 29

53.964 + 1328 1024 176 16 112 71.664 1024x768

66.132 + 816 768 4 8 36

56.476 − 1328 1024 136 24 144 75 1024x768

70.069 − 806 768 6 3 29

60.023 + 1312 1024 96 16 176 78.75 1024x768

75.029 + 800 768 3 1 28

49.725 - 1152 832 64 32 224 57.2832 832x624

74.55 - 667 624 3 1 39

31.469 - 800 640 96 16 48 25.175 640X480

50.030 - 629 480 2 62 85

SYNC

POLARITY

TOTAL

(DOT/LINE)

ACTIVE

(DOT/LINE)

SYNC

WIDTH

(DOT/LINE)

FRONT

PORCH

(DOT/LINE)

BACK

PORCH

(DOT/LINE)

PIXEL

FREQUENCY

(MHZ)

Note1: Mode 640x350, 640x400 and 720x400 cannot be expanded to full screen in vertical direction.

Note 2: Below 800x600 (i.e. 640x??? and 720x???), modes do not support NTAA (No Touch Auto-Adjustment)

1.4 Power Management

1. Meets VESA DPMS Proposal

2. Power Consumption

Meets VESA DPMS Proposal

On mode 30 Wmax Green Stand-by 3 Wmax Amber Suspend 3 Wmax Amber Off mode 3 Wmax Amber DC power off 3 Wmax Dark

disconnection 3 Wmax

 Measured from AC input end of AC power and do not include audio at power-saving state

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

1.5 Plug & Play

(supports VESA DDC1 and DDC2B functions)

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

2. Dark (DC power off)

1.6 External Connection

1.6.1 AC Inlet (Rich-Bay R-30190)

1.6.2 Signal Connector (13 pin D-sub connector)

Pin assignment:

Pin NO. Signal

1 Vertical Sync

2 Horizontal Sync

3 Blue Video Ground

4 Blue Video

5 Green Video Ground

6 Green Video

7 Red Video Ground

8 Red Video

9 Shield Ground

10 DDC-SCL

11 DDC-SDA

12 PC-DETECT

13 PC-5V

1.6.3 Video Cable

(1.5M, with 15 pin D-sub VGA connector)

2. 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

+25%~-5% +5%~-3%

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