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– 5 –

Since the diagnosis results displayed on the screen are not automatically cleared, always check the self-diagnostic
screen during repairs. When you have completed the repairs, clear the result display to “0”.

Unless the result display is cleared to “0”, the self-diagnosis function will not be able to detect subsequent faults after
completion of the repairs.

[Clearing the result display]
To clear the result display to “0”, press buttons on the remote commander sequentially as shown below when the self-
diagnostic screen is being displayed.

Channel [8]

/ 0

[Quitting Self-diagnostic screen]
To quit the entire self-diagnostic screen, turn off the power switch on the remote commander or the main unit.

[+B overcurrent $OCP%]

Occurs when an overcurrent on the +B(135) line is detected by Q500. If Q500 go to
ON and the voltage to pin 50 of IC301 more than 3.5V when V.SYNC is more than
seven verticals in a period, the unit will automatically turn off.

[Vertical deflection stopped]

Occurs when an absence of the vertical deflection pulse is detected by Pin 17 and
IC001 shut down the power supply.

[White balance failure]

If the RGB levels* do not balance or become low level within 5 seconds, this error
will be detected by IC301. TV will stay on, but there will be no picture.

* (Refers to the RGB levels of the AKB detection Ref pulse that detects IK.)

IC301

Y/CHROMA JUNGLE

IC001

SYSTEM

IC003

MEMORY

MP/
PROTECT

11 DAT1

DAT

11 DAT0

5

50

54

SDA

8

FROM
[+B] Q500

17

[V] 
D553

53

– 6 –

 A board

1Eight screws

(BVTP 4 

× 16)

2 Rear cover   

1 Two screw
     (+BVTP 4 

× 16)

1 Terminal
     bracket

3 Two screw
     (+BVTP 4 

× 16)

2 One screw
     (+BVTP 3 

× 16)

– 7 –

• After removing the anode, short circuit the anode of the picture tube and the anode cap to the metal chassis, CRT

shield or carbon paint on the CRT.

• REMOVING PROCEDURES

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 di-
rection indicated by the arrow B.

3

turning up the rubber cap and pulling it up in the
direction of the arrow C.

• HOW TO HANDLE AN ANODE-CAP

1

2

3

anode button

• The picture tube is upside-down and the position for the anode cap and tension springs are changed accordingly.
• Please make sure the TV set is not in standing position before removing necessary CRT support located on bottom

right and left.

1) Place the TV set with the CRT face down on a cushion jig.
2) Remove the rear cover.
3) Unplug all inder connecting leads from the Deflection Yoke, Degaussing Coil and CRT grounding strap.

a

a

b

b

c

0

 Earth Coating Assy

4 Anode Cap Removal

qd

 Top Switch Block

qa

 Degaussing Coil

5 C Board Removal

6 Chassis Assy Removal

8

 Support, CRT(2) Removal

9

 Spring Tension Removal

qs

 Nut, Special, CRT (4)

7

 Loosen the Deflection Yoke
fixing screw and remove

– 8 –

The following adjustments should be made when a complete

realignment is required or a new picture tube is installed.

These adjustments should be performed with rated power

supply voltage unless otherwise noted.

Controls and switches should be set as follows unless otherwise

noted:

PICTURE control ...........................................................  normal

BRIGHTNESS control ...................................................  normal

Perform the adjustments in the following order :

1. Beam Landing

2. Convergence

3. Focus

4. White Balance

Note :  Test Equipment Required.

1. Pattern Generator

2. Degausser

3. Oscilloscope

................................................................................................................................................................................................................................

normal

In order to reduce the influence of geomagnetism on the
set's picture tube, face it east or west.
Switch on the set's power and degauss with the degausser.

1. Input a white signal with the pattern generator.

Contrast
Brightness

2. Set the pattern generator raster signal to a green raster.
3. Move the deflection yoke to the rear and adjust with the

purity control so that the green is at the center and the blue
and the red take up equally sized areas on each side.
(See Figures 2-1 through 2-4.)

4. Move the deflection yoke forward and adjust so that the

entire screen is green. (See Figure 2-1.)

5. Switch the raster signal to blue, then to red and verify the

condition.

6. When the position of the deflection yoke has been decided,

fasten the deflection yoke with the screws and DY spacers.

7. If the beam does not land correctly in all the corners, use a

magnet to adjust it.
(See Figure 2-4.)

}

Purity control

Red

Blue

Green

Deflection yoke positioning

corrects these areas.

Purity control corrects

this area.

Disk magnets or rotatable
disk magnets correct
these areas (a-d).

b  

c

a

d

b

a

c

d