CPD-G520 (serv.man2) - Sony Monitor Service Manual (repair manual). Page 14

Connect the communication cable of the connector located on the D Board on the monitor. Run the service software and then follow the instructions.

IBM at Computer

as a Jig

1

2

3

1-690-391-21

A-1500-819-A

Interface Unit

3-702-691-01

Connector Attachment

BUS CONNECTOR

To

D-Sub

(9 Pin [female])

Mini Din

(8 Pin)

4 Pin 4 Pin

4 Pin

* The Parts above (          ) are necessary for DAS Adjustment.

1 3

~

9.  Attach a wobbling coil to the specified position of CRT neck.
10.  Put on landing sensor to CRT face.
11.  Set LCC_SW to 12.
12.  With landing checker, adjust DY position, purity, DY center and the 

landing of the 4 corners.

13.  Read VX and VY values which are read out of the magnetic sensor, 

and write to LCC_VX_REF and LCC_VY_REF.

14.  Adjust landing by LCC_NS, LSS_LT, LCC_LB, LCC_RT, and 

LCC_RB. Adjustment of registers shall be limited within the 

following range:

 

LCC_NS: 128 ± 15

 

LCC_LT, LCC_LB, LCC_RT, and LCC_RB:  128 ± 40

 

Set LCC_SW to 13, and Perform Service Save.

 ± 6

 ± 6

 ± 6

 ± 6

 ± 6

 ± 6

 ± 6

 ± 6

 ± 6

<Specifications>

Adjust so that the green is within

the specification given right.

4 corner adjust target : within ± 1

The red and blue must be within

the specification given right with

respect to the green.

A difference between red and blue

must  be  within  the  specification

given right.

0 ± 3 0 ± 7.5 0 ± 3
0 ± 3 0 ± 7.5 0 ± 3
0 ± 3 0 ± 7.5 0 ± 3

(µm)

(µm)

10

10

10

10

7

10

10

10

10

(µm)

15.  Tighten DY screw within specified torque, and auto-degauss.
 

NOTE:  Torque 22 ± 2 kgcm (2.2 ± 0.2 Nm)

  Allow a 30 minute warm-up period prior to making the following 

adjustments.

1.  Display the all white pattern.
2.  Set contrast to 255.
3.  Display plain green pattern.
4.  Slide the DY back and roughly adjust the plain green pattern with 

the purity magnet so that it is centered on the screen.

5.  Adjust the DY tilt.
 

NOTE:  Set ROTATION to 128 and LCC_NS to 128 when adjusting 

the DY tilt.

6.  Lightly tighten the DY screw.

NOTE:  (1) After  adjusting  W/B  (9300k),  measure  the  average  of  ΣΙΚ 

with  all  white  video  input,  while  CONTRAST  is  maximum 

and  BRIGHTNESS  is  centered.  Make  the  adjustments  so 

that  the  miss-landing  becomes  least  after  aging  2H  with 

the ΙΚ 30% of measured value shown above.

 

(2) The magnetic field shall be BH = 0.

 

(3) When adjusting at other than BH = 0, calculate the shifted 

value from BH = 0.

1.  Place the monitor in the Helmholtz coil.
2.  Set as follows;
 

LCC-SW = 0  (LCC Correction Current = 0)

 

FUNCTION_SW bit1 =   (Auto Degauss = On)

 

CONTRAST = 255

3.  Display plain green pattern.
4.  Degauss the iron part of the chassis with a hand-degausser and 

degauss coil. 

5.  Degauss the CRT face with degauss equipment or hand-degausser. 
6.  Input AC 230V to AC IN and turn the monitor off and on to activate 

the auto degausser.

7.  Reset FUNCTION_SW bit 1 to 0 (auto-degauss = off)
8  Repeat step 5 by degaussing the CRT face with degauss equipment 

or hand-degausser.