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2-4

CN11

CN801

CN1

2pin

4

Four screws
(Tapping screw (5))

3

Three connectors

7

Neck assembly

1

Anode cap

2

A board

8

Deflection yoke

6

Picture tube

5

Bezel assembly

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

.

• HOW  TO  HANDLE  AN  ANODE-CAP

1

Don’t scratch the surface of anode-caps with sharp shaped
material!

2

Don’t press the rubber hardly not to damage 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 damage the rubber.

• REMOVAL  OF  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.

• 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 direction indicated by the
arrow 

b

.

2-5

CN603

CN501

CN600

H board

Degaussing coil

N board

FBT

A board

Picture tube

Rear shield

Side cover (L) 

CN11

CN2001

CN1

CN702

CN701

CN904

CN601

CN315

CN309

CN301

CN313

CN302

CN1003

CN1002

CN1004

D board

AC inlet

CN310

CN306

CN311

CN303

Part Replaced (

])

D Board T901(FBT), IC901,

R924, R925, RV901
• Mounted D board

D Board T901(FBT), R917,

R918, R923, R920,
R919, R1004, C920,
D911, R912,
• Mounted D board

D Board R933, R932, R921,

R1006, D915, D917,
IC901, T901(FBT)
• Mounted D board

1) Apply the voltage 21.1       VDC between D912 cath-

ode and GND shown on the right to confirm that the

RASTER will vanish.

1) Connect Power Supply 1.68 mA to between pin 11 ~

GND of FBT (T901).

2) Confirm that voltage on C922 (ABL DET.) is less

than 2.25 V or monitor will shut down.

1) Turn ON Power Supply.

2) Connect 3 

Z/20 W of Resistor between +200 V Line

and GND, and make sure that OCP will function

(Power LED will vanish and the sound “chi,chi,chi

will be heard.), and cut-off AC input promptly.

1) Apply AC100 V to the D Board.

2) Make sure that the line voltage at the both ends of

C621 is 200 

± 3.0 VDC.

HV Regulator
Circuit Check

HV Protector
Circuit Check

Beam Current
Protector Circuit
Check

When replacing or repairing the shown below table, the

following operational checks must be performed as a

safety precaution against X-rays emissions from the unit.

3-1

Part Replaced (

[)

RV901

HV ADJ

*

Confirm one minute after turning on the power.

1) Adjust the high voltage 27.0 kV 

± 0.2 kV by the

RV901.

Note:Perform high voltage adjustment after the rough adjust-

ments were completed on PICTURE size and FOCUS.

+ 0.00
– 0.05

4-1

• Landing Rough Adjustment
1. Enter the full white signal. (or the full black dots signal).
2. Adjust the contrast to the maximum.
3. Make the screen monogreen.
Note: Off the outputs from R ch and B ch of SG.
4. Reverse the DY, and adjust coarsely the purity magnet so

that a green raster positions in the center of screen.

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

comes monogreen.

6. Adjust the tilt of DY. For the TILT component, use TLV of

DY.

Note: Observe the following adjustment conditions:

“TILT” = 0
“VPIN SAW TOP” = 0
“VPIN SAW BTM” = 0

7. Lock the DY lightly with a locking fitting.

• Landing Fine Adjustment
<Landing adjustment conditions>
a) Brightness: 1/3 

Σ IK (Σ IK = 750 µA)

b) Aging time: 2 hours or more.
c) Atmospheric temperature: 25 

°C

d) magnetic Field:

BH = 0 

± 2 µT

BV = 45 

± 2 µT (U/C, AEP)

–55 

± 2 µT (South Hemisphere)

–10 

± 2 µT (Equator destination)

e) Adjustment point:

1-inch inside from the edge of CRT effective tube surface.

1. Put the set inside the Helmholtz coil.
2. Set the TLH plate to “0” position.
3. Set the purity magnet of Neck Assy in “0” position, and lock

with a white pen.

4. Set “VPIN SAW TOP” and “VPIN SAW BTM” to “0” posi-

tion.

5. Receive an image of the monogreen signal.
6. Degauss the CRT and iron shield parts.
Note: Iron bottom chassis and EMI shield should be degaussed

before assembling the chassis.

7. Perform auto degaussing.
8. Attach the wobbling coil to the designated part of the CRT

neck.

9. Attach the sensor of the landing adjustment unit on the CRT

surface.

10. Adjust the DY position and purity, and the DY tilt.
Note: Use purity magnet on the DY.
11. Fasten DY with screw.
Note: Torque 22 

± 2 kg•cm (2.2 ± 0.2 Nm).

12. Perform auto degaussing.

13. Using two wedges, adjust vertical pins so as to attain a=b as

shown below. Further, insert two wedges as shown in the
right figure, and lock the center so that DY does not fluctuate
horizontally.

Note: Insert wedges completely so that the DY does not move.

14. If the corner landing is out of the specification, use the land-

ing magnet so as to satisfy the specification.
<Specification>
a) Green

x 

±  4

x 

±  7.5 x ± 4

x 

±  4

x 

±  7.5 x ± 4

x 

±  4

x 

±  7.5 x ± 4

[X] is bias value for a difference caused depending on
whether the EMI shield and rear cover are present or not.
J Models : x = 1.5 [

µm]

b) Difference between Green and Red, and between Green

and Blue.

± 5

± 5

± 5

± 5

± 5

± 5

± 5

± 5

±  5

[

µm]

c) Difference Red and Blue.

± 8

± 8

± 8

± 8

± 7

± 8

± 8

± 8

±  8

[

µm]

Note:
(1) Do not paste more than two magnets on one corner.
(2) Magnets will be placed in a range of 80 ~ 120 mm from the

DY along the diagonal lines.

15. After placing magnets, absolutely degauss and check the re-

sults.

16. Remove the sensor and wobbling coil.
17. Check that the DY is not tilting, and fix the purity Mg with a

white pen.
<RTV and wedge position>
(1) Apply RTV to the shaded portions.
(2) Lock CRT, wedges, and DY with RTV.

[Rear view]