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– 13 –

Two screws
(+BVTT 4 x 10)

4

Remove the video block assy
(Refer to 2-2.)

1

Anode cap

2

Deflection yoke

3

Picture tube

5

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 

.

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

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.

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.

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

.

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

.

– 15 –

•

1.

Enter the full white signal. (or the full black dots signal).

2.

Set the contrast to the maximum.

3.

Make the screen monogreen.

4.

Reverse the DY, and adjust coarsely the purity magnet so
that a green raster positions in the center of screen.

Note: Off the outputs from R ch and B ch of SG.
5.

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

6.

Adjust the tilt of DY, and fix lightly with a clamp.

Note: "TILT" shall be set at 0.

•

1.

Put the set inside the Helmholtz coil.

2.

Input the single green signal and set the CONT control to
MAX.

Note: Set to 

∑

 1k=300 

µ

A with the signal green signal, and after

aging for about 30 minutes, adjust so that it is exactly this
value.

3.

Demagnetize the metal part of the chassis with the hand de-
gausser and coil degausser, and the CRT surface with the
hand degausser.
Input AC 230V to AC IN, turn on and off the power to per-
form auto degaussing.
Demagnetize the CRT surface with the hand degausser
again.

Note:
(1) Adjust in s non-magnetic field. BV=45uT.
(2) If adjusting in a magnetic fields, add the shift from the non-

magnetic field in your estimation.

4.

Attach the wobbling coil to the designated part of the CRT
neck.

5.

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

6.

Adjust the DY position and purity, and the DY tilt, and land-
ing of the center and 4 corners with the landing checker.

<Specification>

Adjust the green of corners 1 to 4, and center 6 to 

±

5 

µ

m, and

red and blue to within 

±

7 

µ

m of green, and the difference be-

tween red and blue to within 

±

10 

µ

m.

Adjust the green of 5 and 7 to within 

±

10 

µ

m, and red and blue

to within 

±

7 

µ

m of green, and the difference between red and

blue to within 

±

10 

µ

m.

(Set each corner to 1st frame of the crosshatch.)

7.

For the up/down and left/right swing, swing the DY and in-
sert a wedge so that the up and down pins are equal at the top
and bottom and the horizontal trapezoid is equal at the left
and right. Insert the wedge firmly so that the DY does not
shake.

8.

Check the landing of each corner, and if they do not satisfy
the specification, paste a Disk-Mg onto the funnel and ad-
just.

Note:
(1) Do not paste more than 2 magnets to one corner.
(2) Paste within 80 to 100 mm from the DY on the diagonal line

of the magnet.

(3) If using the magnet, be sure to demagnetize with the hand

degausser and check.

9.

Remove the sensor and wobbling coil.

10. Switch the signal to R.G.B., and check that each color is

pure.

11. Check that the DY is not tilting, and fix the purity Mg with a

white pen.

12. Fasten DY with screw.
Note: Torque 20 

±

2kg·cm

1

2

4

3

6

7

5

– 16 –

IBM AT Computer

as a Jig

1-690-391-21

1

A-1500-819-A

Interface Unit

2

*The parts above (        ‘       ) are necessary for DAS adjustment.

1

3

D-sub

(9 Pin [female])

mini Din

(8Pin)

4 Pin

3-702-691-01

Connector Attachment

3

To BUS CONNECTOR

4 Pin

4 Pin

Connect the communication cable of the computer to the connector located on the D board on the monitor.  Run the service software and
then follow the instruction.

XBV

XCV

B

R

B

R

R

B

B

R 

H. TILT 

YBH

TLV

R B

YCH

B

R

R
B

R
B

•

(1) Receive an image of the white crosshatch signals (white

lines on black).

(2) Place the protrusions (A and B) of the 6-fold poles magnet

attached to the CRT neck upon each other.  (See fig. 3)

(3) Make rough adjustment of the H direction convergence by

using H. STAT VR (RV101.  Right side of the video case).

(4) Make a rough adjustment of the V direction convergence by

using “V. CONV”.

XCV

RV101
H. STAT

XBV

YBH

YCH

TLV

TLH

TLH

Fig. 1

Fig. 2

Purity 6-pole magnet

Fig. 5

Adjust VMC

Fig. 3

Fig. 4

Tab B

Tab A

Adjust HMC

<6 Pole Magnet>

A

293 mm

B

MODE

7,10

1~6,8,9

234 mm

300 mm

225 mm

a

B

A

b

a 

 3.0 mm

b 

 3.0 mm

•

•

(1) 9300K

x = 0.283 

±

 0.005

y = 0.298 

±

 0.005

(All White)

(2) 6500K

x = 0.313 

±

 0.005

y = 0.329 

±

 0.005

(3) 5000K

x = 0.345 

±

 0.005

y = 0.358 

±

 0.005

•

•

Adjust the focus volume 1 and 2 for the optimun focus.

FBT

Focus volume 1

Focus volume 2

B

A

A

0.30 mm

B

MODE

9

1-8, 10

0.40 mm

0.35 mm

0.45 mm

– 20 –

• All capacitors are in 

µ

F unless otherwise noted. pF:  

µµ

F

50 V or less are not indicated except for electrolytic.

• Indication of resistance, which does not have one for rating

electrical power, is as follows.

Pitch: 5 mm

Rating electrical power 1/4 W (CHIP : 1/10 W)

• All resistors are in ohms.

•

: nonflammable resistor.

•

: fusible resistor.

•

¢

: internal component.

•

: panel designation, and adjustment for repair.

• All variable and adjustable resistors have characteristic curve B,

unless otherwise noted.

•

: earth-ground.

•

: earth-chassis.

• The components identified by 

 in this basic schematic diagram

have been carefully factory-selected for each set in order to

satisfy regulations regarding X-ray radiation.

Should replacement be required, replace only with the value

originally used.

• When replacing components identified by 

, make the

necessary adjustments indicated. (See page 14)

• When replacing the part in below table, be sure to perform the

related adjustment.

HV Regulator
Circuit

HV Hold-Down
Circuit

Beam Current
Protector Circuit

D board

IC401, IC403, RV401,
FBT (T404),

D425,

D423, R460, R461,
R462, R493
• Mounted D board

D board

IC401, D439, D442,
D443, D444, R422,
R435, R448, R490
• Mounted D board

D board

IC401, D429, D445,
R435, R470, R472,
R487, R497, R501,
R503, R508
• Mounted D board

HV ADJ

RV401

• All voltages are in V.

• Readings are taken with a 10 M

Ω

 digital multimeter.

• Readings are taken with a color-bar signal input.

• Voltage variations may be noted due to normal production

tolerances.

•

*

: Can not be measured.

• Circled numbers are waveform references.

•

: B + bus.

•

: B – bus.

A

D

N