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– 5 –

The AC leakage from any exposed metal part to earth ground

and from all exposed metal parts to any exposed metal part hav-

ing a return to chassis, must not exceed 0.5 mA (500

microampers).

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 instruments.

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” indica-

tion is 0.75 V, so analog meters must have an accurate low-

voltage scale. The Simpson 250 and Sanwa SH-63Trd are

examples of a passive VOMs that are suitable. Nearly all

battery operated digital multimeters that have a 2 V AC

range are suitable.  (See Fig. A)

¡

¡

After correcting the original service problem, perform the fol-

lowing safety checks before releasing the set to the customer:

1. Check the area of your repair for unsoldered or poorly-sol-

dered 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 tran-

sistors, 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.

Fig. A. Using an AC voltmeter to check AC leakage.

1.5 k

Ω

0.15 

µ

F

AC
Voltmeter
(0.75 V)

To Exposed Metal
Parts on Set

Earth Ground

– 6 –

.................................................................. 1-1

2-1.

Cabinet Assy, Shield and Holder J Removal ...... 2-1

2-2.

J Board Removal .................................................. 2-1

2-3.

A Board and GA Board Removal ....................... 2-2

2-4.

Liquid Crystal Panel Module

and H Board Removal .......................................... 2-2

...................................................... 3-1

4-1.

Block Diagrams .................................................... 4-1

4-2.

Frame Schematic Diagram ................................... 4-7

4-3.

Circuit Boards Location ...................................... 4-9

4-4.

Schematic Diagrams and Printed Wiring Boards ... 4-9

(1) Schematic Diagram of J Board ............................ 4-10

(2) Schematic Diagram of H Board ........................... 4-11

(3) Schematic Diagram of A (P1-P8) Board ............. 4-13

(4) Schematic Diagram of GA Board ........................ 4-29

4-5. Semiconductors ................................................... 4-35

5-1.

Chassis ................................................................. 5-1

5-2.

Packing Materials ................................................ 5-2

............................ 6-1

1-1

4

• 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 which generates

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

• Do not leave the LCD screen facing the sun as it can

damage the LCD screen. Take care when you place the
monitor by a window.

• Do not push or scratch the LCD screen. Do not place a

heavy object on the LCD screen. This may cause the
screen to lose uniformity.

• If the monitor is used in a cold place, a residual image

may appear on the screen. This is not a malfunction.
When the monitor becomes warm, the screen returns to
normal.

• If a still picture is displayed for a long time, a residual

image may appear. The residual image will eventually
disappear.

• The screen and the cabinet become warm during

operation. This is not a malfunction.

A specially designed fluorescent tube is installed as the
lighting apparatus for this monitor. If the LCD screen
becomes dark, unstable or does not turn on, consult your
Sony dealer.

• 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 ballpoint pen or
screwdriver. This type of contact may result in a scratched
picture tube.

• Clean the screen with a soft cloth. If you use a glass

cleaning liquid, do not use any type of cleaner
containing an antistatic solution or similar additive as this
may scratch the screen’s coating.

• When you transport this monitor, grip the bottom of the

screen firmly with both hands.  If you drop the monitor,
you may be injured or the monitor may be damaged.

• When you transport this monitor for repair or shipment,

use the original carton and packing materials.

• Use an appropriate power cord for your local power

supply.
For the customers in the U.S.A.
If you do not use the appropriate cord, this monitor will
not conform to mandatory FCC standards.
For the customers in the UK
If you use the monitor in the UK, please use the supplied
UK cable with the UK plug.

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

Do not include the monitor with household waste.

5

See the pages in parentheses for further details.

1 u (power) switch and indicator (pages 8,

Turns the monitor on or off.
The indicator lights up in green when the monitor is
turned on, and either flashes in green and orange or
lights up in orange when the monitor is in power
saving mode.

2 MENU (menu) button (pages 9 – 16, 19)

Displays the MENU OSD (On-Screen Display).

3 ¨ (brightness) (˘) button (pages 9 – 16)

Adjusts the picture brightness.

Functions as the ˘ button when selecting menu items.

4 > (contrast) (≥) button (pages 9 – 16)

Adjusts the contrast.

Functions as the ≥ button when selecting menu items.

5 +/– (adjust) buttons (pages 11 – 16)

Adjusts the selected menu item.

6 AUTO button (page 10)

When the signal from the computer is displayed on this
monitor, press the AUTO button to automatically adjust
the picture to the computer.
You also should press this button if the picture is not
centered or if it is fuzzy.

7 …1, 2 input switch and indicator (page 8)

Selects the input signal from …1 or …2. Each time you
press the button, the input changes and the
corresponding indicator lights up.

8 …1/…2 input connectors (HD15) (pages 6,

Input analog RGB video signals (0.714 Vp-p, positive)
and SYNC signals.

9 DC IN connector (page 6)

Provides DC power to the monitor from the AC
adaptor.

* This connector is used by service personnel only. Do not

connect anything to this outlet.

1

2

3

4

5

6

7

AUTO

MENU

8

9

1-2

6

…

…

Before using this monitor, check that the following items are
included in your carton:
• LCD monitor (1)
• Rear cover (1)
• Power cord (1)
• AC adapter (1)
• HD15 video signal cable (1)
• Macintosh adapter (1)
• Windows

 

 Monitor Information Disk/Utility Disk (1)

• Macintosh Utility Disk (1)
• Warranty card (1)
• These operating instructions (1)

Turn off the monitor and computer before connecting.

This monitor uses the No. 9 pin in the video signal connector for
Plug & Play (DDC2B and DDC2Bi) compatibility.  See page 20 for
the location of the No. 9 pin.
• If your computer accepts the No. 9 pin, use the supplied HD15

video signal cable.

• If your computer does not accept the No. 9 pin, please consult

your dealer for advice on obtaining an HD15 adapter.

Use the supplied Macintosh adapter.

*

Connect the supplied Macintosh adapter to the computer before
connecting the cable. This adapter is compatible with Macintosh
LC, Performa, Quadra, Power Macintosh and Power Macintosh
G3 series computers (sold before January, 1999). If you are
connecting to a Power Macintosh G3 series that sold after
January 1999, you will need a different adapter (not supplied).
Macintosh II series and some older versions of PowerBook
models may need an adapter with micro switches (not
supplied).

With the monitor and computer switched off, connect one
end of the power cord to the AC power adapter, and the AC
power adaptor to the monitor. Then connect the other end
of the power cord to a power outlet.

…

…

7

1

2

After connecting the computer and power cord, attach the
supplied rear cover.
Make sure that you keep the screen upright when attaching
the rear cover.

The tilt feature will adjust the monitor within 30

°

 upward,

and 45

°

 to the left or right. However, best viewing results

can be obtained by tilting the screen upward by 5

°

 or more.

To turn the monitor, hold at the bottom with both hands as
illustrated below.

°

°

°