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1-6

• 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 5).
• 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.

• These wires stabilize the vertically striped aperture grille (page 11). 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).

2-1

     Two claws

     Cabinet

2

Hitting the side of cabinet 
strongly with your both hands, 
pull it toward the front.

     Two screws (+BVTP 4 x 16)

1

1

2

3

A board

D board

     A board

     Four screws

(+BVTP 3 x 12)

     Screw

(+BVTT 4 x 8)

     Cable stopper

     Two screws

(+BVTP 3 x 12)

     Cable bracket

     D board

2

3

5

     Five claws

7

6

8

4

1

3

When one side of the rubber cap is
separated from the anode button, the
anode-cap can be removed by turning
up the rubber cap and pulling up it in the
direction of the arrow 

c

.

•

1

Don’t hurt the surface of anode-caps with shartp shaped
material!

2

Don’t press the rubber hardly not to hurt inside of anode-caps!
A material fitting called as shatter-hook terminal is built in the
rubber.

3

Don’t turn the foot of rubber over hardly!
The shatter-hook terminal will stick out or hurt the rubber.

•

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.

•

1

Turn up one side of the rubber cap in
the direction indicated by the arrow 

a

.

2

Using a thumb pull up the rubber cap
firmly in the direction indicated by the
arrow 

b

.

• Remove the A and D boards (Refer to 2-3).

2-2

1

2

3

     Anode cup

Cushion

4

5

6

     Neck assy

     Deflection yoke

     Picture tube

     Picture tube shield

     Four screws

(Tapping screw 5)

3-1

When replacing parts shown in the table below, the fol-

lowing operational chacks must be performed as a safety

precaution against X-ray emissions from the unit.

1) Using an external DC Power supply, apply the volt-

age 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 ± 0.01 VDC

• Input voltage : 120 ± 2 VAC

• Input signal

:(fH = 64 kHz), White Cross Hatch

• Controls

: CONT (max) & BRT (center)

• B+ Voltage

: 182.5 ± 3.0 VDC

1) Using an external DC power supply, apply the volt-

age 8.8 ± 0.01 VDC between pin !¡ of FBT (T501)

and GND, and confirm that the voltage across C541

is 3.7 VDC or less.

• Input voltage : 120 ± 2 VAC

• Input signal

:(fH = 64 kHz), White Cross Hatch

• Controls

: CONT (max) & BRT (center)

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

2) CONT (max) & BRT (center)

3) Input voltage: 120 ± 2 VAC

Note: Use NF power supply or make sure that distor-

tion factor is 3% or less.

4) Confirm that the B+ voltage is within the voltage

range shown below.

Standard voltage: 182.5 ± 3.0 VDC

D BOARD

Part Replaced (

[)

RV501 (HV ADJ)

Part Replaced (

])

IC501, IC605, IC901, D517, C535, C540, C541, C542,

C544, C553, C554, C555, C558, C561, R545, R546,

R547, R548, R549, R550, R552, R564, R567, RV501,

T501 (FBT)

* Allow the unit to warm up for one minute prior to check-

ing the following conditions:

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 ± 2 VAC

5) Confirm that the voltage is within the voltage range

shown below.

Standard voltage: 25.0 ± 0.5KVDC

6) When replacing components identified by 

], make

sure to recheck the High Voltage.

7) Verify the High Voltage as shown above (25 ±

0.5KVDC) 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 specifica-

tion, put the RV cover on RV501 as shown below

and apply sufficient amount of RTV around RV501.

104

RV501