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– 13 –

     Screw
     (+BVTP 4 x 16)

4

     Screw
     (+BVTP 4 x 16)

6

     Two screws
     (+BVTT 4 x 10)

3

     Two screws
     (+BVTT 4 x 10)

5

     Stand block

7

     A block

GND

GND

2

     Anode cap

Cushion

Speaker lead

CN501

CN503

CN601

Connector

1

GND

Speaker
lead

     Picture tube

     Neck assy

     Deflection yoke

     Picture tube shied

     Two tapping 
     screws (5)

2

     Two tapping screws (5)

3

4

5

6

1

GND

Cushion

– 14 –

Part Replaced (

[

)

RV501

HV ADJ

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.

•

Using an external DC Power Supply, applying voltage of

7.00 ± 0.05 V between !] pin of FBT (T501) and GND,

and confirm that the vlotage of both ends C519 is with in

the Voltage range shown below.

• Standard voltage : Less than 3.26 V DC

• Input voltage : 240.0 V AC

• Input signal

: Cross hatch at 64.0 kHz

(VESA 1024 x 768)

• Beam control : CONT : 100 %, BRT : 40 %

•

Standard voltage : 150.0 ± 2.0 V DC

• Input voltage : 240.0 ± 2.0 V AC

Note : Use NF power supply or make sure that

distortion factor is 3% or less.

• Input signal

: Cross hatch at 64.0 kHz

• Beam control : CONT : 100 %, BRT : 40 %

HV Regulator
Circuit

HV Protector
Circuit

Beam Current
Protector Circuit

Part Replaced (

]

)

D board IC801, C509, C542,

C548, C802, C814,
C815, R538, R539,
R540, R541, R807,
R822, R823, R824,
RV501, T501 (FBT)

D board IC801, IC904, D511,

D515, C515, C516,
C517, C910, R532,
R533, R534, R535,
R996, T501 (FBT)
• Mounted D board

D board IC901, D596, C519,

C528, C549, C904,
R542, R543, R544,
R545, R939
• Mounted D board

*

Confirm one minute later turning on the power.

•

Confirm that the HV protector circuit works and CRT

screen disappearing when apply the voltage as shown

below between Cathode of D511 on D board and GND

using an external DC Power Supply.

• Standard voltage  :  35.00

V DC

• Input voltage : 240.0 ± 2.0 V AC

• Input signal

: Cross hatch at 64.0 kHz

(VESA 1024 x 768)

• Beam control : CONT : 100 %, BRT : 40 %

+0.00

–0.10

– 15 –

Fixing DY with wedges.

“a” and “b” must be equal, and
“c” and “d” must be almost equal.

9.

Adjust vertical swing with vertical pins, and also adjust hori-
zontal swing so that horizontal keystone and vertical tilt are
optimum, then fix with four wedges.
(When fixing DY with wedges, insert wedges completely so
that the DY does not shake.)

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.

<How to drive in wedges>

Apply a locking agent to the
upper wedges only.
In such a case, apply agent so that
it enters both sides of wedge and
also inside the DY.

10. Check the landing of each corner, and if they do not satisfy

the specification, paste a Disk-Mg onto the funnel and ad-
just.

11. If using the magnet, be sure to demagnetize with the hand

degausser and check.

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

white pen.

•

1.

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

2.

Set the contrast to “CONT”=MAX.

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 (2-
pole Mg) so that a green raster positions in the center of
screen.
The 2-pole Mg adjustment must be done on the DY side (do
not use 2-pole Mg on the neck assy side).

Note: Stack 2-pole Mg on neck assy side with their sides flushed.

Adjust color Knob
to non-color Knob.

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.
(Adjust to L/D control brightness)

[L/D control brightness]
Adjust L/D after aging for 2 hours with L/D control bright-
ness
(1) L/D control brightness ......... 1/2 between cool L/D and

hot L/D (Reference : 

∑

Ik =

200 uA)

(2) Practical max brightness ...... 110 cd/m

2

 

∑

Ik = 595 uA

[L/D control specification]
In Y axis : ± 7.5 um
At corners : ± 5.0 um

3.

Demagnetize the CRT surface with the hand degausser , and
perform auto degaussing.

Note: Adjust in a non-magnetic field.
4.

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

5.

Pull out the TLH correction piece up to the position where a
stopper is engaged.

6.

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

7.

Adjust the DY position and purity, and the DY tilt.
For the purity adjustment, use 2-pole Mg on DY side.

8.

Fasten DY with screw.

Note: Torque 22 ±2kg·cm (2.2 ± 0.2 Nm)

Perform auto degaussing.

c

a

b

d

– 16 –

A

312 mm

B

MODE

All mode

234 mm

a    1.6 mm
b    1.6 mm

a

B

A

b

B

A

A

0.24 mm

B

MODE

All mode

0.32 mm

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.

•

1.

Enter the white crosshatch signal (white lines on black).

2.

Adjust roughly the horizontal and vertical convergence at
four-pole magnet.

3.

Adjust  roughly HMC and VMC at six-pole magnet.
Standard: ± 0.1mm (In the center of screen)

•

•

(1) 9300K

x = 0.283 ± 0.008
y = 0.298 ± 0.008

(2) 5000K

x = 0.345 ± 0.008
y = 0.358 ± 0.008

•

•

Adjust the focus volume 1 and 2 for the optimum focus.
Standard: HMC, VMC ± 0.1 mm (In the center of screen)

XBV

XCV

YBH

YCH

TLV

TLH

Purity Mg

6-pole Mg

4-pole Mg

2-pole Mg

<6 Pole Magnet>

Tab B

Tab A

Fig. 4

Fig. 3

Fig. 5

XBV

XCV

B

R

B

R

R

B

B

R 

H. TILT 

YBH

TLV

R B

YCH

B

R

R
B

R
B

Fig. 1

Fig. 2

FBT

Focus volume 1 (V)

Focus volume 2 (H)