DOWNLOAD Sony CPD-101VS Service Manual ↓ Size: 6.02 MB | Pages: 48 in PDF or view online for FREE

2-5

CN6002

CN6003

CN6001

CN902

CN904

CN502

CN501

CN512 

CN607

CN601

CN314

CN903

CN503

CN5202

CN5204

CN5601

CN5607

CN5605

CN5606

CN5200

FBT

D board

Picture tube

Demagnetization coil

Speaker

U board

DA board

AC inlet

J board

Microphone

Stand assy

A board

AA board

CN316

CN309

CN306

CN315

CN310

CN307

CN308

CN302

CN301

CN303

CN305

Ferrite Bead

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.

•

Confirm that the voltage between cathode of D517 on D

board and GND is more than 17.5 V DC and Using ex-

ternal DC Power Supply, apply the voltage shown below

between cathode of D517 and GND, and confirm that

the HV HOLD DOWN circuite works. (TV Rester dis-

appears)

Standard voltage  :  Less than 31.70 V DC

• Input voltage : 100 – 120 V AC

• Input signal

: White Cross hatch at Max fH

• Beam control : CONT : 255, BRT : 80

•

Connect a variable resistor (20 k

Ω

 or more) and an am-

meter in series between FBT pin !] on D board and –15

V line. Decrease gradually the resistance of the variable

resistor from maximum to minimum, and confirm that

the Beam Current Protector Circuite works (TV Rester

disappears). The current must be within the range shown

below.

• Standard current  :  Less than 1.50 mA

• Input voltage : 100 – 120 V AC

• Input signal

: White Cross hatch at Max fH

• Beam control : CONT : 255, BRT : 80

•

Standard voltage : 150.0 

±

 3.0 V DC

• Input voltage : 100 – 120 V AC

Note : Use NF power supply or make sure that

distortion factor is 3% or less.

• Input signal

: White Cross hatch at 64.0 kHz

• Beam control : CONT : 255, BRT : 80

HV Regulator
Circuit Check

HV Hold-down
Circuit Check

Beam Current
Protector Circuit
Check

Part Replaced (

]

)

D board IC501, C553, C554,

C555, C558, C561,
R540, R564, R567,
RV501, T501 (FBT)

D board IC603, IC901, D515,

D517, C540, C542,
C544, R543, R547,
R549, R552,
T501 (FBT)

D board IC603, IC604, IC901,

C535, C541, R515,
R545, R546, R548,
R550, R934,
T501 (FBT)

*

Confirm one minute later turning on the power.

3-1

4-1

5.

Attach the sensor of the landing adjustment unit on the CRT
surface.
Purity magnet position

<Neck Assy Zero Position>

•

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.

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.

•

< Measurement condition >

Brightness : 

∑

Ik (520µA)

Magnetic field : BH=0, BV=45µT
CRT size : 270 

× 

202

Measurement point : 256 

× 

190

Temperature : 25ºC

After aging for 9 minutes and more than 3 hours, adjust so
that it is exactly this value.

a

b

c

d

[ µm ]

a1

a4

a7

a2

a5

a8

a3

a6

a9

- a1

- a4

- a7

  —

  —

  —

   2

   2

   2

- a2

- a5

- a8

  —

  —

  —

   2

   2

   2

- a3

- a6

- a9

  —

  —

  —

   2

   2

   2

+ a1

+ a4

+ a7

   —

—

—

2

2

2

+ a2

+ a5

+ a8

   —

—

—

2

2

2

+ a3

+ a6

+ a9

—

—

—

2

2

2

1 minute

3 hours

< Adjustment target>

After aging for 1 minute and more than 3 hours, adjust so
that it is exactly this value.

1.

Put the set inside the Helmholtz coil.

2.

Input the single green signal.

3.

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

4.

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

6.

Adjust the DY position and purity, and the DY tilt.

7.

Fasten DY with screw.

Note: Torque 22 ±2kgcm (2.2 ± 0.2 Nm)

Perform auto degaussing.

8.

Adjust each top and bottom pins by two wedges, and also
adjust swinging DY neck right-left by H.TILT and horizon-
tal trapezoid, and then fix with two wedges.
(When fixing DY with wedges, insert wedges completely so
that the DY does not shake.)

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

Signal : Inverted crosshatch (Make the monogreen)

L/D control specification

± 5

± 7

± 5

± 5

± 7

± 5

± 5

± 7

± 5

<How to drive in wedges>

9.

If they do not satisfy the specification, connect the purity
magnet on DY and the disc magnet of the front and the rear
of DY located CRT side.

Note:
(1) When necessary to paste magnets more than 2 pieces, be

careful that the convergence and the distortion would be al-
terable.

(2) Paste within 80 to 120 mm from the DY on the diagonal line

of the magnet.

10. If using the magnet, be sure to demagnetize with the de-

gausser and check.

11. Remove the sensor and wobbling coil.
12. Check that the DY is not tilting.

B

R

B

R

A

B

R

B

R

B

A1

B1

“A” and “B”,
“A1” and “B1”
must be equal.

Purity

Set the
finger

+ ax

—

2

- ax

  —

   2

L/D 

[ µm ]

180

L/D Drift Curve

1

0

4-2

A

270 mm

B

MODE

All mode

202 mm

a    1.8 mm
b    1.8 mm

a

B

A

b

B

A

A

0.24 mm

B

MODE

All mode

0.30 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) 1100K

(2) 9300K

x = 0.274 ± 0.008

x = 0.283 ± 0.008

y = 0.287 ± 0.008

y = 0.298 ± 0.008

(3) 5000K

x = 0.345 ± 0.008
y = 0.358 ± 0.008

•

•

Adjust the focus volume 2 for the optimum focus.

TLV

XCV

YCH

NECK Assy

Six-Pole Mg

P.S Mg

XBV

DY

CRT

Four-Pole Mg

<6 Pole Magnet>

Fig. 4

Fig. 3

Fig. 5

XCV

YCH

B

R

TLV

R

B

R
B

B
R

Fig. 1

Fig. 2

FBT

Focus volume 2

A Board

Focus (H)

Tab B

Tab A

Adjust HMC

Adjust VMC