Sony D825TM Service Manual

D825TM

SERVICE MANUAL

D825TM

US Model

Canadian Model

Japan Model

AEP Model

S. Hemisphere Model

Chassis No. SCC-L06C-A

D-1

CHASSIS

Picture tube

Video image area

Logical resolution

Physical resolution

Standard image area

Input signal

Video

Sync

SPECIFICATIONS

0.25 mm aperture grill pitch 15 inches measured diagonally 90-degree deflection

(14" maximum viewing image) Approx. 286.5 x 214 mm (w/h)

3/8

(11

Horizontal: Max. 1280 dots Vertical: Max. 1024 lines

Horizontal: Max. 1024 dots Vertical: Max. 768 lines

Approx. 270 x 202 mm (w/h) (10

Analog RGB (75 ohms typical)

0.7 Vp-p, Positive External HD/VD, Composite Polarity Free TTL Video Composite (Sync on Green)

0.3 Vp-p, Negative

1/2

x 8

inches)

3/4

x 8 inches)

Power Consumption

Maximum Nominal

Deflection frequency

AC input voltage / current

Dimensions

Mass

Design and specifications are subject to change without notice.

110W 80W, 273 BTU/h

Horizontal: 30 to 70 KHz Vertical: 50 to120 Hz

100 to 120 V, 50/60 Hz, 1.8 A 220 to 240V, 50/60Hz, 1A

368 x 392 x 384.5 mm (w/h/d)

1/2

(14

x 15

Approx. 14.0 kg (30 lb 14 oz)

x 15

1/4

inches)

COLOR MONITOR

— 1 —

D825TM

POWER SAVING FUNCTION

This monitor has three Power Saving modes. By sensing the absence of a video signal from the computer, it reduces power consumption as follows:

State Power Required u Power indicator

consumption recovery time

1. Normal Operation < 110W Green on

2. Standby (1st mode)

3. Suspend (2nd mode)

4. Active-off (3rd mode)

5. Power-off 0W Off

6. Failure mode Orange flashing

< 15W approx. 3 sec. Green and orange

<15W Approx. 3 sec. Green and orange

<8W Approx. 10 sec. Orange

NOTE:

If no video signal is input to the monitor, the "NO INPUT SIGNAL" message appears. After about 30 seconds, the Power Saving function automatically puts the monitor into active-off mode and the indicator lights up orange. Once the monitor detects horizontal and vertical sync signals, the monitor automatically resumes normal operation mode.

alternate

TIMING SPECIFICATION

MODE 1 2 3 4 5 6 7 8 9 10

Resolution (H x V) 640X480 720X400 640X480 640X480 800X600 800X600 800X600 1024X768 1024X768 1280X1024 Dot Clock (MHz) 25.175 28.321 31.500 36.000 40.000 49.500 56.250 78.750 94.500 108.000

HORIZONTAL

Hor. Freq. (kHz) 31.469 31.468 37.500 43.269 37.879 46.875 53.674 60.023 68.677 63.981 H-Total 31.778 31.779 26.667 23.111 26.400 21.333 18.631 16.660 14.561 15.630 H-Blanking 6.356 6.356 6.349 5.333 6.400 5.172 4.409 3.657 3.725 3.778 H-Front Porch 0.636 0.636 0.508 1.556 1.000 0.323 0.569 0.203 0.508 0.444 H-Sync. 3.813 3.178 2.032 1.556 3.200 1.616 1.138 1.219 1.016 1.037 H-Back Porch 1.907 2.542 3.810 2.222 2.200 3.232 2.702 2.235 2.201 2.296 H-Active 25.422 25.423 20.317 17.778 20.000 16.162 14.222 13.003 10.836 11.852 (µsec)

VERTICAL

Ver. Freq. (Hz) 59.940 70.084 75.000 85.008 60.317 75.000 85.061 75.029 84.997 60.020 V-Total 525 449 500 509 628 625 631 800 808 1066 V-Blanking 45 49 20 29 28 25 31 32 40 42 V-Front Porch 10 13 1 1 1 1 1 1 1 1 V-Sync. 2 2 3 3 4 3 3 3 3 3 V-Back Porch 33 34 16 25 23 21 27 28 36 38 V-Active 480 400 480 480 600 600 600 768 768 1024 (lines)

SYNC.

Int(G) NO NO NO NO NO NO NO NO NO NO Ext (H/V)/Polarity YES -/- YES -/+ YES -/- YES -/- YES +/+ YES +/+ YES +/+ YES +/+ YES +/+ YES +/+ Ext (CS)/Polarity NO NO NO NO NO NO NO NO NO NO Int / Non Int Non Int Non Int Non Int Non Int Non Int Non Int Non Int Non Int Non Int Non Int

— 2 —

SAFETY CHECK-OUT

(US Model only)

D825TM

After correcting the original service problem, perform the following safety checks before releasing the set to the customer:

1. Check the area of your repair for unsoldered or poorly-soldered connections. Check the entire board surface for solder splashes and bridges.

2. Check the interboard wiring to ensure that no wires are “pinched” or contact high-wattage resistors.

3. Check that all control knobs, shields, covers, ground straps, and mounting hardware have been replaced. Be absolutely certain that you have replaced all the insulators.

4. Look for unauthorized replacement parts, particularly transistors, that were installed during a previous repair. Point them out to the customer and recommend their replacement.

5. Look for parts which, though functioning, show obvious signs of deterioration. Point them out to the customer and recommend their replacement.

6. Check the line cords for cracks and abrasion. Recommend the replacement of any such line cord to the customer.

7. Check the B+ and HV to see if they are specified values. Make sure your instruments are accurate; be suspicious of your HV meter if sets always have low HV.

8. Check the antenna terminals, metal trim, “metallized" knobs, screws, and all other exposed metal parts for AC Leakage. Check leakage as described below.

LEAKAGE TEST

The AC leakage from any exposed metal part to earth ground and from all exposed metal parts to any exposed metal part having a return to chassis, must not exceed 0.5 mA (500 microampere). Leakage current can be measured by any one of three methods.

1. A commercial leakage tester, such as the Simpson 229 or RCA WT-540A. Follow the manufacturers' instructions to use these instructions.

2. A battery-operated AC milliammeter. The Data Precision 245 digital multimeter is suitable for this job.

3. Measuring the voltage drop across a resistor by means of a VOM or battery-operated AC voltmeter. The "limit" indication is 0.75 V, so analog meters must have an accurate low voltage scale. The Simpson's 250 and Sanwa SH-63Trd are examples of passive VOMs that are suitable. Nearly all battery operated digital multimeters that have a 2V AC range are suitable. (See Fig. A)

WARNING!!WARNING!!

WARNING!!

WARNING!!WARNING!!

NEVER TURN ON THE POWER IN A CONDITION IN WHICH THE DEGAUSS COIL HAS BEEN REMOVED.

SAFETY-RELATED COMPONENT WARNING!! COMPONENTS IDENTIFIED BY SHADING AND MARK ¡ ON THE SCHEMATIC DIAGRAMS, EXPLODED VIEWS AND IN THE PARTS LIST ARE CRITICAL FOR SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY . CIRCUIT ADJUSTMENTS THAT ARE CRITICAL FOR SAFE OPERATION ARE IDENTIFIED IN THIS MANUAL. FOLLOW THESE PROCEDURES WHENEVER CRITICAL COMPONENTS ARE REPLACED OR IMPROPER OPERATION IS SUSPECTED.

0.15 µF

To Exposed Metal Parts on Set

1.5 k

Earth Ground

AVERTISSEMENT!!

NE JAMAIS METTRE SOUS TENSION QUAND LA BOBINE DE DEMAGNETISATION EST ENLEVEE.

ATTENTION AUX COMPOSANTS RELATIFS A LA

Ω

AC Voltmeter (0.75 V)

LES COMPOSANTS IDENTIFIES P AR UNE TRAME ET PAR UNE MARQUE ¡ SUR LES SCHEMAS DE PRINCIPE, LES VUES EXPLOSEES ET LES LISTES DE PIECES SONT D'UNE IMPORTANCE CRITIQUE POUR LA SECURITE DU FONCTIONNEMENT. NE LES REMPLACER QUE PAR DES COMPOSANTS SONY DONT LE NUMERO DE PIECE EST INDIQUE DANS LE PRESENT MANUEL OU D ANS DES SUPPLEMENTS PUBLIES PAR SONY. LES REGLAGES DE CIRCUIT DONT L'IMPORTANCE EST CRITIQUE POUR LA SECURITE DU FONCTIONNEMENT SONT IDENTIFIES DANS LE PRESENT MANUEL. SUIVRE CES PR OCEDURES LORS DE CHAQUE REMPLA CEMENT DE COMPOSANTS CRITIQUES, OU LORSQU'UN MAUVAIS FONTIONNEMENT SUSPECTE

SECURITE!!

— 3 —

D825TM

Section Title Page

1. GENERAL ................................................................................... 5

2. DISASSEMBLY

2-1. Cabinet Removal ............................................................10

2-2. Service Position .............................................................. 10

2-3. D,A and D1 Board Removal.......................................... 10

2-4. Picture Tube Removal ................................................... 11

3. SAFETY RELATED ADJUSTMENT................................. 12

4. ADJUSTMENTS ........................................................................13

5. DIAGRAMS

5-1. Block Diagram ................................................................15

5-2. Circuit Boards Location .................................................18

5-3. Schematic Diagrams and Printed Wiring Boards ...... 18

1. D Board - Schematic Diagram .................................19

2. A Board - Schematic Diagram ................................. 23

3. D1 Board - Schematic Diagram .............................. 26

5-4. Semiconductors ..............................................................27

6. EXPLODED VIEWS

6-1. Chassis (US, CND) .........................................................29

6-2. Chassis (Japan, S. Hemisphere, AEP)........................ 30

6-3. Packing Materials .......................................................... 31

7. ELECTRICAL PARTS LIST ................................................ 32

— 4 —

The instructions given here are partial abstracts from the Operating Instruction

Table of Contents

Installation

• Prevent internal heat build up by allowing adequate air

circulation. Do not place the monitor on surfaces (rugs, blankets, etc.) or near materials (curtains, draperies) that may block the ventilation holes.

• Do not install the monitor near heat sources such as

radiators or air ducts, or in a place subject to direct sunlight, excessive dust, mechanical vibration or shock.

• Do not place the monitor near equipment that generates

magnetism, such as a converter, or high voltage power lines.

Maintenance

• Clean the cabinet, panel and controls with a soft cloth

lightly moistened with a mild detergent solution. Do not use any type of abrasive pad, scouring powder or solvent such as alcohol or benzine.

• Do not rub, touch or tap the surface of the screen with

sharp or abrasive items such as a ball point pen or screwdriver. This type of contact may scratch the picture tube.

Warning on Power Connection

• Use an appropriate power cord for your local power

supply.

For customers in the U.S.A.

If you do not use an appropriate power cord, the monitor will not conform to mandatory FCC standards.

for 220 to 240 V ACfor 100 to 120 V AC

• Before disconnecting the power cord, wait for at least 30

seconds after turning off the power to allow the static electricity on the CRT display surface to discharge.

• After the power has been turned on, the CRT is

demagnetized (degaussed) for about 5 seconds. This generates a strong magnetic field around the metal frame, which may affect the data stored on magnetic tapes and disks near the monitor. Place magnetic recording equipment, tapes and disks away from this monitor.

Read First! ................................................................................. 3

Damper Wire ............................................................................ 3

Setup .......................................................................................... 3

Quick Specifications ................................................................ 3

Precautions ............................................................................... 4

Plug and Play ........................................................................... 4

Parts and Controls ................................................................... 5

The OSD (On-screen Display) System ................................. 6

Resetting the Adjustments ..................................................... 9

Plug and Play

This monitor complies with the DDC

1 and DDC2B Display

Data Channel (DDC) standards of VESA. When a DDC1 host system is connected, the monitor synchronizes with the V. CLK in accordance with the VESA standards, and outputs the EDID (Extended Display Identification Data) to the data line. When a DDC2B host system is connected, the monitor automatically switches to the appropriate standard.

DDC

is a trademark of Video Electronics Standard

Association.

• Your monitor operates according to DDC2B. Only

computers that support the same guidelines and operate at the same or higher level can make use of this feature.

• If your computer does not support the relevant

guidelines, you can still use your monitor and computer. You may need to manually specify the appropriate resolution in the computer.

• The highest resolution automatically selected may not

give the best result. You may need to manually select the most suitable resolution in the computer.

Precautions

Examples of plug types:

for 240 V AC only

The socket should be installed near the equipment and be easily accessible.

Graphic Enhancement Mode (GEM) .................................. 10

Specifications .......................................................................... 10

Monitor Information ............................................................. 11

Power Saving Function and LED Indicators .................... 11

Preset and User Modes ......................................................... 11

Warning Messages................................................................. 12

Troubleshooting ..................................................................... 12

Dell Computer Corporation’s Environmental Program . 14

Appendix .............................................................................. 109

Getting Started

Video Connector

Pin No. Signal 1 Red 2 Green (Composite

Sync on Green) 3 Blue 4 Ground 5 CPU Sense 6 Red Ground 7 Green Ground

Pin No. Signal 8 Blue Ground 9 Not used

(no pin)

10 Ground 11 Ground 12 SDA

(serial data)

13 Horizontal Sync 14 Vertical Sync 15 SCL

(serial clock)

Use of the Tilt/Swivel

With the tilt/swivel, you can adjust this monitor to any desired angle within 180° horizontally and 20° vertically. To turn the monitor vertically and horizontally, hold it at the bottom with both hands as shown below.

Parts and Controls

Rear

(RESET) button (pages 6 and 9)

Resets the adjustments to the factory settings.

2 (GEM) button (page 10)

Selects the Graphic Enhancement Mode.

3 ¨ (BRIGHTNESS) ./> buttons (page 6)

Adjust the picture brightness. Operate as the ./> buttons when adjusting other items.

4 (MENU) button (pages 6 and 11)

Displays the MENU OSD.

5 > (CONTRAST) ?// buttons (page 6)

Adjust the contrast. Operate as the ?// buttons when adjusting other items.

6 u (POWER) switch and indicator (page 11)

Turns the monitor on and off. The indicator lights up green when the monitor is on, and lights up orange when the monitor is in Power Saving mode.

7 AC IN connector

Provides AC power to the monitor.

8 Video input connector (HD15)

Inputs RGB video signals and SYNC signals

Front

Getting Started

15°

90°

5°

11 12 13 14 15

12345

78910

Manual. The page numbers shown reflect those of the Operating Instruction Manual.

SECTION 1

GENERAL

— 5 —

D825TM

EXIT

CENTER

SIZE

GEOM

COLOR

LANG

ZOOM

SCREEN

OPTION

ENGLISH FRANÇAIS DEUTSCH ESPAÑOL

LANGUAGE

SIZE

CENTER

ZOOM

73V

66H

ROTATION

GEOMETRY

9300K 5000K

COLOR

MANUAL DEGAUSS

OPTION

H CONVERGENCE

SCREEN

The OSD (On-screen Display) System

Introducing the OSD System

You can adjust most of the monitor’s settings using the OSDs (On-screen Display). All of the OSDs numbered in this illustration are described on the following pages in order. You can access any of these OSDs from the MENU OSD. To adjust monitor settings using the OSDs, follow the steps below:

Basic controls:

• Use the

(MENU) button to display the MENU OSD

and to select menu items.

• Use the ¨ (BRIGHTNESS) ./> and > (CONTRAST)

?// buttons to highlight menu items and to adjust settings.

To adjust the monitor settings: 1 Press the MENU button to display the MENU OSD. 2 Highlight the desired OSD using the BRIGHTNESS and

CONTRAST buttons and press the MENU button again.

3 If necessary, use the BRIGHTNESS buttons to select a

specific item.

4 Adjust the monitor setting using the BRIGHTNESS and

CONTRAST buttons.

• To reset the current item to its original setting, press the (RESET) button while the item’s adjustment OSD

is displayed.

5 When you finish adjusting the setting, press the MENU

button to return to the MENU OSD. Press the MENU button twice to return to normal viewing.

• Resetting: If you press the RESET button while an OSD is

displayed, only the current adjustment item is reset. For additional information on using the reset function, see the “Resetting the Adjustments” section on page 9.

• The OSD automatically disappears after 30 seconds.

Customizing Your Monitor

Horizontal frequency

Vertical frequency

Adjusting the Picture Brightness and Contrast

Press the ¨ (BRIGHTNESS) ./> or > (CONTRAST) ?// buttons.

The BRIGHTNESS/CONTRAST OSD appears.

To adjust the brightness

Press the ¨ (BRIGHTNESS) ./> buttons.

To adjust the contrast

Press the > (CONTRAST) ?// buttons.

COLOR CENTER

SCREEN

GEOMETRY ZOOM

LANGUAGE OPTIONSIZE

BRIGHTNESS/CONTRAST

26 26

60.0kHz/ 85Hz

Getting Started

1 Using the COLOR OSD

You can adjust the monitor’s color temperature using the COLOR OSD. For example, you can adjust the monitor to match the colors of a printed picture. You can adjust the color temperature from 9300K (blue-white) to 5000K (warm red). This setting is stored in memory for all input signals.

1 Press the MENU button to display the MENU OSD. 2 Highlight the COLOR OSD using the BRIGHTNESS and

CONTRAST buttons and press the MENU button again.

3 Press the ¨ (BRIGHTNESS) ./> buttons to select either the

9300K, 5000K or variable

option.

• The 9300K and 5000K options display accurate preset

color temperatures.

• The variable

option allows you to adjust the monitor using the full range of color temperatures. Adjust to the desired color temperature using the BRIGHTNESS and CONTRAST buttons.

4 Press the MENU button once to return to the MENU OSD,

or press it twice to return to normal viewing.

Note

If you are using one of the GEMs (Graphic Enhancement Mode), you can only adjust the color temperature from 11,000K to 9300K. For more information on GEMs refer to the “Graphic Enhancement Mode (GEM)” section on page 10.

2 Using the CENTER OSD

You can adjust the picture centering using the CENTER OSD. This setting is stored in memory for the current input signal.

1 Press the MENU button to display the MENU OSD. 2 Highlight the CENTER OSD using the BRIGHTNESS and

CONTRAST buttons and press the MENU button again.

3 To adjust vertical centering, press the ¨ (BRIGHTNESS)

./> buttons.

4 To adjust horizontal centering, press the > (CONTRAST)

?// buttons.

5 Press the MENU button once to return to the MENU OSD,

or press it twice to return to normal viewing.

Customizing Your Monitor

3 Using the SCREEN OSD

You can adjust the convergence of the picture and cancel the picture’s moire using the SCREEN OSD. Convergence is the alignment of the Red, Green and Blue electron beams on the screen. When convergence is not aligned, red or blue shadows may be noticeable (especially with text) which can affect the clarity or focus of the image. Moire is a wavy or elliptical pattern which may appear on the screen. The moire cancel adjustment is provided to eliminate moire. This setting is stored in memory for all input signals.

1 Press the MENU button to display the MENU OSD. 2 Highlight the SCREEN OSD using the BRIGHTNESS and

CONTRAST buttons and press the MENU button again.

3 Press the ¨ (BRIGHTNESS) ./> buttons to select the

desired adjustment item.

4 Press the > (CONTRAST) ?// buttons to adjust the item. 5 Press the MENU button once to return to the MENU OSD,

or press it twice to return to normal viewing.

adjust the horizontal convergence

adjust the vertical convergence

eliminate elliptical or wavy lines on the screen

adjust the degree of moire cancellation

* CANCEL MOIRE must be “ON” for “

(MOIRE ADJUST)” to

appear on the screen.

Adjusting the Settings

Select

H CONVERGENCE

V CONVERGENCE

CANCEL MOIRE

MOIRE ADJUST

— 6 —

4 Using the ZOOM OSD

You can enlarge or reduce the picture size using the ZOOM OSD. This setting is stored in memory for the current input signal.

1 Press the MENU button to display the MENU OSD. 2 Highlight the ZOOM OSD using the BRIGHTNESS and

CONTRAST buttons and press the MENU button again.

3 Press the > (CONTRAST) ?// buttons to enlarge or

reduce the picture size.

4 Press the MENU button once to return to the MENU OSD,

or press it twice to return to normal viewing.

Note

You can enlarge or reduce the picture size until either the horizontal or vertical size reaches its maximum or minimum value.

7 Using the LANGUAGE OSD

You can set the OSD language to English, German, French, Spanish or Japanese using the LANGUAGE OSD. To reset to English, press the RESET button while the LANGUAGE OSD is displayed.

1 Press the MENU button to display the MENU OSD. 2 Highlight the LANGUAGE OSD using the BRIGHTNESS

and CONTRAST buttons and press the MENU button again.

3 Press the ¨ (BRIGHTNESS) ./> buttons to select the

desired language.

4 Press the MENU button once to return to the MENU OSD,

or press it twice to return to normal viewing.

5 Using the OPTION OSD

You can manually degauss (demagnetize) the CRT, move the OSD position and lock the user controls using the OPTION OSD.

1 Press the MENU button to display the MENU OSD. 2 Highlight the OPTION OSD using the BRIGHTNESS and

CONTRAST buttons and press the MENU button again.

3 Press the ¨ (BRIGHTNESS) ./> buttons to select the

desired adjustment item.

4 Press the > (CONTRAST) ?// buttons to activate the

manual degauss, move the OSD position or lock the user controls.

5 Press the MENU button once to return to the MENU OSD,

or press it twice to return to normal viewing.

Degauss: If a second degauss cycle is needed, allow a minimum interval of 20 minutes for the best result.

OSD Position Change: To change the OSD position, press the ¨ (BRIGHTNESS) ./> buttons to select the direction (horizontal or vertical), then press the > (CONTRAST) ?// buttons to move the OSD in the selected direction.

User Control Lock: Once you select “ON” to lock the user controls, you cannot select any item except “EXIT” and “OPTION” in the MENU OSD. If you try to access any other OSD, the H mark appears on the screen.

To cancel the Control Lock: Repeat the above procedure and set Control Lock to “OFF.”

6 Using the SIZE OSD

You can adjust the picture size using the SIZE OSD. This setting is stored in memory for the current input signal.

1 Press the MENU button to display the MENU OSD. 2 Highlight the SIZE OSD using the BRIGHTNESS and

CONTRAST buttons and press the MENU button again.

3 To adjust the vertical size press the ¨ (BRIGHTNESS) ./>

buttons.

4 To adjust the horizontal size press the > (CONTRAST)

?// buttons.

5 Press the MENU button once to return to the MENU OSD,

or press it twice to return to normal viewing.

Customizing Your Monitor

Getting Started

8 Using the GEOMETRY OSD

You can adjust the picture’s geometry using the GEOMETRY OSD. This setting is stored in memory for the current input signal.

1 Press the MENU button to display the MENU OSD. 2 Highlight the GEOMETRY OSD using the BRIGHTNESS

and CONTRAST buttons and press the MENU button again.

3 Press the ¨ (BRIGHTNESS) ./> buttons to select the

desired geometry adjustment.

4 Press the > (CONTRAST) ?// buttons to adjust the

geometry.

5 Press the MENU button once to return to the MENU OSD,

or press it twice to return to normal viewing.

Select

ROTATION

PINCUSHION

PIN BALANCE

KEYSTONE

KEY BALANCE

adjust the picture rotation

adjust the picture sides

adjust the picture side balance

adjust the trapezoidal distortion

adjust the picture shape balance

Resetting the Adjustments

Customizing Your Monitor

Resetting all of the adjustments for the current input signal

While there is no OSD displayed, press the

(RESET)

button.

All of the adjustments for the current input signal are reset to

the factory settings.

Adjustments not affected by changes in the input signal (such as OSD language, OSD position and the Control Lock function) are not reset to the factory settings.

Resetting all of the adjustments for all input signals

Press and hold the

(RESET) button for more than two

seconds.

All of the adjustments, including the brightness and contrast, are reset to the factory settings.

Resetting a specific adjustment:

1 Press the MENU button to display the MENU OSD 2 Highlight the OSD containing the adjustment you want to

reset using the BRIGHTNESS and CONTRAST buttons and press the MENU button again.

3 Press the ¨ (BRIGHTNESS) ./> buttons to select the

adjustment you want to reset.

4 Press the

(RESET) button to reset this specific

adjustment.

— 7 —

D825TM

Customizing Your Monitor

Graphic Enhancement Mode (GEM)

You can automatically change the characteristics of the picture to match the way you use your monitor with the Graphic Enhancement Mode (GEM). Simply press the

(GEM) button

to cycle through the three modes.

Turn on the monitor and computer.

Press the (GEM) button to set the mode.

Each time you press the

(GEM) button, the mode changes

and appears on the screen as follows.

STANDARD MODE

PRESENTATION MODE

GRAPHICS/VIDEO MODE

The STANDARD MODE is ideal for spreadsheets, word processing, and other text oriented applications.

The PRESENTATION MODE is useful for presentation programs that require vivid colors.

The GRAPHICS/VIDEO MODE gives movies and games enhanced visual appeal by increasing the sharpness and brightness.

The selected mode indication appears on the screen for about three seconds.

If the screen appears too white, adjust the color temperature (see “Using the COLOR OSD” on page 7).

Note

The PRESENTATION MODE and GRAPHICS/VIDEO MODE may produce ghost images when displaying text oriented applications. These modes change the brightness of the picture dynamically according to changes in moving pictures. If ghost images appear, set the GEM to STANDARD MODE.

Troubleshooting

This section may help you isolate the cause of a problem and as a result, eliminate the need to contact technical support.

Symptom Check these items

No picture

If the u indicator is not lit

If the “NO INPUT SIGNAL” message appears on the screen, or if the u indicator is either orange or alternating between green and orange

If the “OUT OF SCAN RANGE” message appears on the screen

If no message is displayed and the u indicator is green or flashing orange

Picture is scrambled

Color is not uniform

Warning Messages

If there is something wrong with the input signal, one of the following messages appears.

Input signal condition

• Make sure the power cord is properly connected.

• Make sure the u (POWER) switch is in the “ON” position.

• Try pressing any key on the computer keyboard.

• Make sure your computer is turned on.

• Make sure the video signal cable is properly connected and all plugs are firmly seated in their sockets.

• Make sure none of the HD15 video input connector pins are bent or pushed in.

• Make sure the video board is completely seated in the proper bus slot.

• Make sure the video frequency range is within that specified for the monitor. Horizontal: 30 – 70 kHz Vertical: 50 – 120 Hz Refer to your computer system’s instruction manual to adjust the video frequency range.

• If you are using a video signal cable adapter, make sure it is the correct type.

• Run the SELF TEST function:

1. Turn off the monitor and disconnect the video cable from the computer.

2. Turn on the monitor and wait five seconds. The “NO INPUT SIGNAL” message should appear with a color bar pattern. The message and pattern are displayed for 30 seconds.

If the monitor displays White, Red, Green and Blue colors, the monitor is functioning properly.

• Make sure none of the HD15 video input connector pins are bent or pushed in.

• Check your video board manual for the proper monitor setting.

• Check this manual and make sure the monitor supports the graphics mode and the frequency at which you are trying to operate. Even if the frequency is within the proper range, some video boards may have a sync pulse that is too narrow for the monitor to sync correctly.

• Degauss the monitor (page 8). If you place equipment which generates a magnetic field, such as a loudspeaker, near the monitor, or you change the direction of the monitor, the color may not be uniform. The degauss function demagnetizes the metal frame of the CRT to obtain a neutral field for uniform color reproduction. If a second degauss cycle is needed, allow a minimum interval of 20 minutes for the best result.

Additional Information

INFORMATION

OUT OF SCAN RANGE

The input signal condition

“OUT OF SCAN RANGE” indicates that the input signal is not supported by the monitor’s specifications.

“NO INPUT SIGNAL” indicates that no signal is input. The message disappears after about 30 seconds.

To solve these problems, see the “Troubleshooting” section below.

— 8 —

D825TM

Getting Started

Symptom Check these items

You cannot adjust the monitor with the buttons on the front panel

Screen image is not centered or sized properly

Edges of the image are curved White lines show red or blue

shadows at edges Picture is fuzzy

Picture bounces or has wavy oscillations

Picture is flickering

Picture appears to be ghosting

Wavy or elliptical (moire) pattern is visible

One fine horizontal line (wire) is visible

Hum is heard right after the power is turned on

White does not look white

• If the Control Lock function is set to “ON,” set it to “OFF” using the OPTION OSD (page 8).

• Adjust the size (page 8) or centering (page 7).

• Some video modes do not fill the screen to the edges. This problem tends to occur with certain video boards.

• Adjust the geometry (page 9).

• Adjust the convergence using the SCREEN OSD (page 7).

• Adjust the contrast and brightness (page 6).

• Degauss the monitor using the OPTION OSD (page 8). If you place equipment which generates a magnetic field, such as a loudspeaker, near the monitor, or you change the direction of the monitor, the color may not be uniform. The degauss function demagnetizes the metal frame of the CRT to obtain a neutral field for uniform color reproduction. If a second degauss cycle is needed, allow a minimum interval of 20 minutes for the best result.

• If red or blue shadows appear along the edges of images, adjust the convergence using the SCREEN OSD (page 7).

• If the moire is cancelled, the picture may become fuzzy. Decrease the moire cancellation effect using the SCREEN OSD (page 7).

• Isolate and eliminate any potential sources of electric or magnetic fields. Common causes for this symptom are electric fans, fluorescent lighting and laser printers.

• If you have another monitor close to this monitor, increase the distance between them to reduce the interference.

• Try plugging the monitor into a different AC outlet, preferably on a different circuit.

• Try using the monitor with a different computer in a different room.

• Refer to your computer system’s manual and change your display refresh rate settings so they match the monitor’s capabilities.

• Eliminate the use of video cable extensions and/or video switch boxes. Excessive cable length or a weak connection can produce this symptom.

• Cancel the moire using the SCREEN OSD (page 7). The moire may be modified depending on the connected computer.

• Due to the relationship between resolution, monitor dot pitch and the pitch of some image patterns, certain screen backgrounds sometimes show moire. Change your desktop pattern.

• This wire stabilizes the vertically striped aperture grille (page 3). This aperture grille allows more light to pass through to the screen giving the Trinitron CRT more color and brightness.

• When the power is turned on, the auto-degauss cycle is activated. While the auto-degauss cycle is activated, a hum may be heard. The same hum is heard when the monitor is manually degaussed. This is not a malfunction.

• Adjust the color temperature using the COLOR OSD (page 7).

Additional Information

— 9 —

D825TM

SECTION 2

DISASSEMBLY

2-1. CABINET REMOVAL

Two claws

Cabinet

Two screws

(BVTP 4 x 16)

PUSH

2-2. SERVICE POSITION

PUSH

A board

D board

2-3. D, A and D1 BOARD REMOVAL

A board

D1 board

— 10 —

Five screws

(BVTP 3 x 12)

One screw

(BVTT 4 x 8)

Cable stopper

Two screws

(BVTP 3 x 12)

Cable bracket

D board

+ 22 hidden pages

Sony D825TM Service Manual

SAFETY CHECK-OUT

TABLE OF CONTENTS

DISASSEMBLY