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– 5 –

Since the diagnostic 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 subsequent as shown below when the
self-diagnostic screen is being displayed.

8 

, -

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

A BOARD

IC001

Y/CHROMA JUNGLE

A BOARD

IC804

V.OUT

A BOARD

IC001

SYSTEM

A BOARD

IC003

MEMORY

FROM

C BOARD

IC751 PIN 5

IK

EHTO

RED LED

DISPLAY

SDA1

V.GUARD

SDA

5

F.B-PLS

3

13

84

32

122

A BOARD

FROM

Q804

COLLECTOR

99

[+B overcurrent $OCP%]

Occurs when an overcurrent on the +B(135V) line is detected by pin 32 of IC001 (A board).
If the voltage of pin 32 of IC001 (A board) is more than 4V, the unit will automatically go
to standby.

[V-PROTECT]

Occurs when an absence of the vertical deflection pulse is detected by pin 13 of IC001
(A board).

[IK $AKB%]

If the RGB levels* do not balance within 15 sec after the power is turned on, this error will
be detected by IC001 (A board). TV will stay on, but there will be 5 times LED blinking.

Occurs when IC001 internal HV protect detects an abnormal H-Pulse (frequency) due to
improper power supply to IC001. TV cuts off high voltage power of anode CRT. No picture
will be detected. eg: IC602, IC604 go faulty.

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

POWER SUPPLY NG (+5V)
for VIDEO PROCESSOR

– 6 –

1 Two screw
     (+BVTP 3 

× 12 TYPE 2 IT-3)

1 A board

1 Terminal
     bracket

2 Two screws
     (+BVTP 4 

× 16 TYPE2 IT-3)

3 One screw
     (+BVTP 3 

× 12 TYPE2 IT-3)

1 Rear cover

2 Six screws
    (+BVTP 4 

× 16 TYPE2 IT-3)             

– 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 Picure tube is upside-down for KV-BM142M10 (OCE) 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 inter connecting leads from the Deflection Yoke, Degaussing Coil and CRT grounding strap.

0 Earth Coating Assy

qf

 Block Center

4 Anode Cap Removal

qs

 Band, DGC Removal

5 C Board Removal

8 Chassis Assy Removal

9

 Support, CRT(2) Removal

qa

 Spring Tension Removal

qd

 Nut, Special, CRT (4)

6 Loosen the Neck Assembly

fixing screw and remove

7

 Loosen the Deflection Yoke

fixing screw and remove

a

a

b

b

c

– 8 –

• The following adjustments should be made when a

complete realignment is required or a new picture
tube is installed.

Set the controls as follows unless otherwise noted:
VIDEO model .....................................................  Standard
PICTURE control ..................................................  normal
BRIGHTNESS control ..........................................  normal

Perform the adjustments in the following order :

1. Beam Landing
2. Convergence
3. Focus
4. Screen(G2)
5. White Balance
Note : Test Equipment Required.

1. Pattern Generator
2. Degausser
3. DC Power Supply
4. Digital Multimeter
5. Oscilloscope

Purity control

Red

Blue

Green

Purity control
corrects this area.

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

Deflection yoke positioning
corrects these areas.

a

b

b

c

c

d

d

a

Preparation :
• 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.

Picture Mode: DYNAMIC
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

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.)

}

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normal