Compaq D-1H User Manual

SERVICE MANUAL

P75

US Model

Canadian Model

UK Model

AEP Model

N. Hemisphere Model

S. Hemisphere Model

Australian Model

Chassis No. SCC-L07E-A

Picture tube

Video image area

Max. resolution

Standard image area

Input signal

Video

Sync

SPECIFICATIONS

0.25 mm aperture grill pitch 17 inches measured diagonally 90-degree deflection

(16" maximum viewing image) Approx. 329.5 x 243 mm (w/h)

5/8

(13 x 9

Horizontal: Max. 1280 dots Vertical: Max. 1024 lines (at 75 Hz Refresh Rates)

Approx. 306 x 230 mm (w/h)(Mode 1-13) Approx. 294 x 231 mm (w/h)(Mode 14-15)

Analog RGB (75 ohms typical)

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

0.286 Vp-p, Negative

inches)

D-1H

Power Consumption

Maximum Nominal

Deflection frequency

AC input voltage / current

Dimensions

Mass

Design and specifications are subject to change without notice.

CHASSIS

115W 100W, 341 BTU/h

Horizontal: 30 to 85 KHz Vertical: 50 to150 Hz

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

424 x 422 x 428 (w/h/d) (16.7 x 16.6 x 16.9 inches)

Approx. 18.48 kg (40.8 lb.)

COLOR MONITOR

POWER SAVING FUNCTION

MODE 1234567891011121314 15 Resolution (H x V) 640x350 640X480 640x480 640x480 720x400 800x600 800x600 800x600 832x624 1024x768 1024x768 1024x768 1152x870 1280x1024 1280x1024 Dot Clock (MHz) 25.175 25.175 31.500 36.000 28.321 40.000 49.500 56.250 57.283 65.000 78.750 94.500 100.000 108.000 135.000

HORIZONTAL

Hor. Freq. (kHz) 31.469 31.469 37.500 43.269 31.468 37.879 46.875 53.674 49.725 48.363 60.023 68.677 68.681 63.981 79.976 H-Total 31.778 31.778 26.667 23.111 31.779 26.400 21.333 18.631 20.111 20.677 16.660 14.561 14.560 15.630 12.504 H-Blanking 6.356 6.356 6.349 5.333 6.356 6.400 5.172 4.409 5.586 4.923 3.657 3.725 3.040 3.778 3.022 H-Front Porch 0.636 0.636 0.508 1.556 0.636 1.000 0.323 0.569 0.559 0.369 0.203 0.508 0.320 0.444 0.119 H-Sync. 3.813 3.813 2.032 1.556 3.813 3.200 1.616 1.138 1.117 2.092 1.219 1.016 1.280 1.037 1.067 H-Back Porch 1.907 1.907 3.810 2.222 1.907 2.200 3.232 2.702 3.910 2.462 2.235 2.201 1.440 2.296 1.837 H-Active (msec) 25.422 25.422 20.317 17.778 25.423 20.000 16.162 14.222 14.524 15.754 13.003 10.836 11.520 11.852 9.481

VERTICAL

Ver. Freq. (Hz) 70.086 59.940 75.000 85.008 70.084 60.317 75.000 85.061 74.550 60.004 75.029 84.997 75.062 60.020 75.025 V-Total 449 52 5 500 50 9 449 6 2 8 6 2 5 631 6 6 7 806 80 0 808 91 5 1066 1066 V- Blanking 9 9 4 5 2 0 2 9 4 9 2 8 2 5 3 1 4 3 38 3 2 40 4 5 42 4 2 V-Front Porch 38 1 0 1 1 12 11113113 1 1 V-Sync. 2233243336333 3 3 V- Back Porch 5 9 3 3 1 6 2 5 3 5 2 3 2 1 2 7 3 9 2 9 2 8 3 6 3 9 3 8 3 8 V-Active (lines) 3 50 480 4 80 480 4 00 600 6 00 600 6 24 7 68 7 68 7 68 870 1024 1024

SYNC.

Int(G)

NO NO NO NO NO NO NO NO NO NO NO NO NO NO NO

Ext(H/V)/Polarity

YES +/- YES -/- YES -/- YES -/- YES -/+ YES +/+ YES +/+ YES +/+ YES -/- YES -/- YES +/+ YES +/+ YES -/- YES +/+ YES +/+

Ext (CS)/Polarity

NO NO NO NO NO 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 Non Int Non Int Non Int Non Int Non Int

State

Power

Consumption

Required Recovery

Time

Power Indicator

1 Normal Operation

<110W



Green on

2 Standby (1st mode)

<1 5W approx. 3 sec. Yellow

3 Suspend (2nd mode)

<1 5W approx. 3 sec. Yellow

4 Active-off (3rd mode)

<8W approx. 10 sec. Amber

5 Power-off 0W



Off

6 Failure mode

 

Orange flashing

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

— 2 —

TIMING SPECIFICATION

NOTE:

P75

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.

SAFETY CHECK-OUT

(US Model only)

P75

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

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 —

TABLE OF CONTENTS

Section Title Page

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

2. DISASSEMBLY

2-1. Cabinet Removal ............................................................8

2-2. Service Position .............................................................. 8

2-3. A, D, H, S Board Removal............................................. 8

2-4. Picture Tube Removal ................................................... 9

3. SAFETY RELA TED ADJUSTMENT.................................10

4. ADJUSTMENTS ........................................................................ 11

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. H, S, U

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

, U2 - Schematic Diagram...............................26

6. EXPLODED VIEWS

6-1. Chassis (US/CANADIAN, AEP, NH, SH, AUS

models made in US) ...................................................... 29

6-2. Chassis (AEP, UK models made in UK) ..................... 30

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

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

The instructions given here are partial abstracts from the Operating Instruction

USB Connectors

The base of the monitor has two Universal Serial Bus (USB) connectors. Use USB connector ❶ to connect the USB signal cable

∗

to the computer. Use USB Connector ❷ to connect USB compatible plug and play devices such as a keyboard, mouse, or joystick if supported by your computer. This feature provides USB pass-through and does not support USB host requirements.

CAUTION:

This USB connector is not designed for use with high speed USB devices such as a video camera, scanner, etc. Compaq recommends connecting high speed devices directly to the computer

✎

These USB connectors operate as a pass-through system. Your computer must have a USB host controller installed for any USB-connected devices to operate.

CAUTION:

To prevent deterioration of signal transfer or malfunction of USB devices, USB cables should not exceed the combined length of 9.75 feet (3 meters). This length includes both the USB signal cable and the USB peripheral cable.

∗

A USB signal cable is not supplied with this monitor.

Operating the Monitor

Front Control Panel

No./ Icon Control Function

Contrast Adjusts contrast by turning control to left or

right.

Brightness Adjusts brightness by turning control to left or

right.

Select button

1. Launches on-screen display.

2. Selects function adjustments.

3. Exits menus and on-screen display.

−

Minus button Selects and adjusts the functions.

Plus button Selects and adjusts the functions. Power switch Turns the monitor on and off.

Power LED 1. Green indicates monitor is turned on.

2. Yellow indicates suspend mode.

3. Amber indicates sleep mode.

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

SECTION 1

GENERAL

On-Screen Display Settings

The adjustments for screen settings are located in the on-screen display and can be viewed in one of five available languages. The on-screen Main Menu displays the following ten functions:

Size and Position Adjusts width, height, and horizontal and vertical

positions of the screen.

Geometry Adjusts pincushion, pincushion balance, trapezoid,

parallelogram, and tilt. Overscan Zooms in and enlarges a selected portion of the screen. Color Displays the following selections for screen color

temperature: 9300° K; 6500° K; Custom

Color/Enhancement Color; and Convergence. Enhancement Enhances screen for screen presentations or viewing

motion video applications. Moiré Minimizes irregular or wavy lines on the screen raster. Degauss Corrects image distortion or color impurity caused by

external magnetic fields. Language Lists the following five language selections for on-

screen display: English, Dutch, French, German, and

Spanish. Management Adjusts power saver and display modes and displays

monitor serial number. Factory Reset Resets the screen to its factory settings.

How to Adjust Settings

To launch the on-screen display Main Menu:

1. Press the Select button

on the monitor front panel to

display the Main Menu on the monitor screen.

2. To make a selection from the Main Menu, scroll down by pressing the Minus (-) button

and reverse or back up by pressing the Plus (+) button ❸ located on the monitor front panel.

3. Highlight your choice and press the

Select

button

again.

For example, if your selection is

Size and Position

, press

the Minus button

until

Size and Position

is highlighted,

then press the Select button

to choose it.

Monitor with On-Screen Display

4. A second level menu displays with expanded menu items. Again, to make a selection, press the Minus (-) button

scroll down or press the Plus (+) button

to reverse or

back up.

IMPORTANT: The Overscan and Degauss selections do not display menus. When you select Overscan, the choices are to turn it on or off. When you select Degauss, the monitor corrects color impurities on the screen. The monitor screen automatically degausses when the monitor is turned on.

5. Highlight your choice and select

Save and Return,

or to advance to the third level menu, highlight your choice and press the Select button. To void any changes made, select

Cancel

instead of

Save and Return.

6. The third level displays a sizing window for adjusting the selected function. To adjust, press the Minus button to decrease the degree of adjustment, or press the Plus button to increase the degree of adjustment.

7. Press the Select button after the adjustment is made.

IMPORTANT: Selections under the Management Menu, Power Saver and Mode Display, turn on and off at the third level. The Serial No. selection displays the monitor serial number at the third level.

Display Resolutions

The display resolutions listed below are the most commonly used modes and are set as factory defaults. The monitor automatically recognizes these preset modes when they are requested by a software program and will provide the user with a properly sized and centered display.

Display Resolutions

Preset Modes Resolutions

1. VGA Compatible 640 X 350 at 31.5 kHz/70 Hz

2. VGA Compatible 640 X 480 at 31.5 kHz/60 Hz

3. VESA Standard 640 X 480 at 37.5 kHz/75 Hz

4. VESA Standard 640 X 480 at 43.3 kHz/85 Hz

5. VGA Compatible 720 X 400 at 31.5 kHz/70 Hz

6. VESA Standard 800 X 600 at 37.8 kHz/60 Hz

7. VESA Standard 800 X 600 at 46.9 kHz/75 Hz

8. VESA Standard 800 X 600 at 53.7 kHz/85 Hz

9. Macintosh Compatible 832 X 624 at 49.72 kHz/74.5 Hz

10. VESA Standard 1024 X 768 at 48.4 kHz/60 Hz

11. VESA Standard 1024 X 768 at 60.0 kHz/75 Hz

12. VESA Standard 1024 X 768 at 68.7 kHz/85 Hz

13. Macintosh Compatible 1152 X 870 at 68.7 kHz/75 Hz

14. VESA Standard 1280 X 1024 at 63.9 kHz/60 Hz

15. VESA Standard 1280 X 1024 at 80.0 kHz/75 Hz

✎

Memory channels 9 and 13 are Macintosh-compatible display modes for use with a Macintosh-compatible computer. If your computer has this requirement, you will need to purchase a special adapter connector to attach to the monitor signal cable.

Connector Pin Assignments

Signal Cable

Connector Pin Signal

KEY

15 14

123

13 12 11

1 2 3 4 5 6 7 8 9 10 11 12

13 14 15

Red Video Green Video Blue Video Open Return Red Gnd Green Gnd Blue Gnd Reserved (No Pin) Sync Return Open Bidirectional Data (SDA) H-Sync/Composite Sync V-Sync Data Clock (SCL)

DDC Signals

Color Display Values

CIE* Chromaticity Coordinates

Red

0.625 0.340

Green

0.285 0.605

Blue

0.150 0.065

White Point (9300 K)

0.281 (+/- .015) 0.311 (+/- .015)

White Point (6500 K)

0.313 (+/- .015) 0.329 (+/- .015)

Gamma: 2.25

Commission International d’Eclairage, 1931 Standard.

P75

SECTION 2

DISASSEMBLY

2-1. CABINET REMOVAL

Two claws

PUSH

Cabinet

2-2. SERVICE POSITION

PUSH

A board

D board

Two screws

(BVTP 4 x 16)

2-3. A, D, H, S BOARD REMOVAL

S board

H board

A board

Five screws

(BVTP 3 x 12)

Cable stopper

Cable bracket

One screw

(BVTT 4 x 8)

D board

2-4. PICTURE TUBE REMOVAL

Four screws

Picture tube shield

Demagnetization coil

Tension spring

A board

Neck assy

Deflection yoke

(Tapping screw 5)

Two screws

Stand assy

(D board)

P75

(BVTP 4 x 16)

Anode cap

Cushion

REMOVAL OF THE ANODE-CAP

NOTE: Short circuit the anode of the picture tube and the anode cap to the metal chassis, CRT shield or carbon painted on the CRT, after removing the anode.

REMOVAL PROCEDURES

Turn up one side of the rubber cap in

the direction indicated by arrow .

Use your thumb to pull the rubber cap

firmly in the direction indicated by arrow .

HOW TO HANDLE AN ANODE-CAP

Do not use sharp objects which may cause damage to the surface

of the anode-cap.

Do not squeeze the rubber covering too hard to avoid damaging

the anode-cap. A material fitting called a shatter-hook terminal is built into the rubber.

Do not force turn the foot of the rubber cover. This may cause the

shatter-hook terminal to protrude and damage the rubber.

When one side of the rubber cap sepa-

rates from the anode button, the anodecap can be removed by turning the rubber cap and pulling it in the direction of arrow .

P75

SECTION 3

SAFETY RELATED ADJUSTMENT

When replacing parts shown in the table below, the following operational checks must be performed as a safety precaution against X-ray emissions from the unit.

D - BOARD

Part Replaced ([)

Part Replaced (])

RV501, T501, R545, R546, R548, R550, R547, R549, R552, D517, IC605, IC901, C540, C542, C544, C541, C535, IC501, C558, R567, R564, C555, C553, C554, C561

Allow the unit to warm up for one minute prior to

checking the following conditions:

RV501

a) HV Regulator Check

1) Input white cross hatch signal. (fH = 64 kHz)

2) Minimum CONT and BRT controls.

3) Cut off Screen VR (G2).

4) Input voltage: 120

5) Confirm that the voltage is within the voltage range shown below.

Standard voltage: 25.0KV

6) When replacing components identified by ], make sure to recheck the High Voltage.

7) Verify the High Voltage as shown above (25.0KV is within specification. If not, set H. SIZE data at minimum (-127) and then adjust RV501 on "D" Board.

8) After adjusting the High Voltage within specification, put the RV cover on RV501 as shown below and apply sufficient amount of RTV around RV501.

+ 2 VAC

+ 0.5KV

+ 0.5KV)

b) HV Hold-Down Check

1) Using an external DC Power supply, apply the voltage shown below between cathode of D517 on "D" Board and GND, and confirm that the HV Hold-Down circuit works. (Raster disappears)

Apply DC Voltage: 31.4

Check Condition

• Input voltage : 120

• Input signal : (fH = 64 kHz), White Cross Hatch

• Controls : CONT (max) & BRT (center)

• B+ Voltage : 185 + 3.0 VDC

c) Beam Protector Check (Software logic)

1) Using an external DC power supply, apply the voltage 8.8 (T501) and GND, and confirm that the voltage across C541 is 3.7 VDC or less.

Check Condition

• Input voltage : 120

• Input signal : (fH = 64 kHz), White Cross Hatch

• Controls : CONT (max) & BRT (center)

d) B+ MAX. Check

1) Input white cross hatch (fH = 64 kHz) signal.

2) CONT (max) & BRT (center)

3) Input voltage: 120 Note: Use NF power supply or make sure that distortion factor is 3% or less.

4) Confirm that the voltage is within the voltage range shown below.

Standard voltage: 185

+ 0.01 VDC between pin 11 of FBT

+ 0.01 VDC

+ 2 VAC

+ 3.0 VDC

104

RV501

SECTION 4

NECK Assy

6-pole Mg

P.S Mg

XBV

DY CRT

4-pole Mg

ADJUSTMENTS

Connect the communication cable of the connector located on the D board on the monitor. Run the service software and then follow the instructions.

IBM AT Computer

as a Jig

1-690-391-21

D-sub (9 Pin [female])

*The parts above ( ~ ) are necessary for DAS adjustment.

mini Din (8Pin)

A-1500-819-A

Interface Unit

4 Pin

3-702-691-01

Connector Attachment

To BUS CONNECTOR

4 Pin 4 Pin

Allow a 30 minute warm-up period prior to making the following adjustments:

Landing Rough Adjustment

1. Enter the full white signal.

2. Adjust the contrast to the maximum.

3. Input full green signal.

Convergence Fine Adjustment Set DY four-pole magnet to mechanical center before adjustment. This should be prime mode.

4. Moving the DY backward, and adjust coarsely the purity magnet sothat a green raster positions in the center of screen.

5. Moving the DY forward, adjust so that an entire screen

becomes pure green.

6. Adjust the tilt of DY, and tighten lightly with a clamp.

P.S Mg

Set the finger

Mechanical Center

• Landing Fine Adjustment

1. Place the set in the Helmholtz coil.

2. Enter a green signal only.

3. Degauss the entire screen with hand-degausser. Then auto-

degauss it.

4. Attach a wobbling coil to the specified position of CRT

neck.

5. Attach a landing adjuster sensor on the CRT.

6. Using a landing checker, adjust the DY position, purity,

tilt of DY.

7. Clamp the DY screw.

Clamping torque: 22

• Convergence Rough Adjustment

1. All digital convergence data should be zero by MCP.

2. Enter the white crosshatch signal.

+ 2 kgcm (2.2+ 0.2 N.m)

3. Adjust roughly the horizontal and vertical

convergence at four-pole magnet.

4. Adjust roughly HMC and VMC at six-pole

magnet.

1. Receive R.B. cross-hatch. 2 Adjust H.STAT and V.STAT at four-pole magnet.

4 Pole Magnet

R B

+ 23 hidden pages