KV-21FA240 - Sony TV Service Manual (repair manual). Page 18

12.  For single system model with NTSC 4.43, select TV channel with 

NTSC 4.43 and repeat items (3) to (8)

The highest level of V

B1

, V

B2

, V

B3

, V

B4

must be aligned at the same time.

The ideal difference between

V

B2

 and V

B3

 is within 

± 80mV

VB1

VB2

VB3 VB4

80mV

13.  Once adjustment is completed in Video mode, carry out adjustment 

in DVD mode. Set TV to DVD mode. Input NTSC 3.58 CB to DVD 

set and perform steps 4 to 9 and 11.

1.  Set TV to RF mode.
2.  Input PAL monoscope to RF mode.
3.  Set Brightness 50% and Picture to “MINIMUM”.
4.  Press  1 (or  4) to select WHBL 010 “SBRT”.
5.  Press  3 to increase the data value, or  6 to decrease the data value 

so that the cut-off level is 10 IRE, slightly glimmer: 20 IRE.

6.  Press  MUTING  then  0 to write into memory.

Geometry  adjustment  must  be  done  for  both  color  systems  PAL  and 

NTSC.

1.  Input Monoscope or Special Color Bar (SPCB) signal using a 

pattern generator.

2.  Access Service Mode.
3.  Select the category item that needs adjusting by pressing  1 or  4
4.  Press  3 to increase the data value, or  6 to decrease the data 

value.

5.  Press  MUTING  then  0 to write into memory.
NOTE: Geometry Adjustment must be performed for 4 different modes: 

  

PAL 50Hz NORMAL MODE, 

 

  

PAL 50Hz WIDE MODE, 

 

  

NTSC 60Hz NORMAL MODE, 

 

  

NTSC 60Hz WIDE MODE.

1.  Input PAL signal 50Hz in the Service Mode.
2.  Set Wide Mode to “OFF”.
3.  Perform the below adjustments using the “General Setting” 

sequence.

GEOM 013

Vertical Shift

(VPOS)

GEOM 011

Vertical Amplitude

(VSIZ)

Note: Adjust VSIZ to

12.4

±

(SPCB)

11.3

±

(PAL Monoscope)

11.5

±

(NTSC Monoscope)

GEOM 000

Horizontal Shift

(HPOS)

GEOM 009

EW Trapezoid

(EWTZ)

GEOM 005

EW Width (EW)

(HSIZ)

Note: Adjust HSIZ to

16.4

±

(SPCB)

14.6

±

(PAL Monoscope)

15.3

±

(NTSC Monoscope)

GEOM 002

Horizontal Bow

(HBOW)

GEOM 006

EW Parabola/Width

(EWPW)

(PW)

GEOM 007

EW Upper Corner

(UCOP)

Parabola

GEOM 008

EW Lower Corner

(LCOP)

Parabola

GEOM 001

Horizontal

(HPAR)

Parallelogram

GEOM 012

S-Correction(SC)

(SCOR)

GEOM 003

Vertical Linearity

(VLIN)

GEOM 004

Vertical Scroll

(VSCR)

4.  After completing the adjustments for PAL 50Hz NORMAL MODE, 

set Wide mode to “ON”, and copy all PAL 50Hz NORMAL MODE 

adjusted data to PAL 50Hz WIDE MODE except VSCR.

5.  Complete the adjustment for NTSC 60Hz NORMAL MODE. 
6.  Set Wide mode to “OFF”.
7.  Complete the adjustment items listed in the above table using the 

“General Setting” sequence.

8.  After completing the adjustments set Wide mode to “ON” and copy 

all NTSC 60Hz NORMAL MODE adjusted data to NTSC 60Hz 

WIDE MODE except VSCR.

9.  After completing all the adjustments, reconfirm VSIZ and VPOS.