2-3. Focus Adjustment; 2-4. G2(Screen) Adjustment; White Balance Adjustement - Sony TRINITRON KV-21CT1B Servicehandbuch

2-3. FOCUS ADJUSTMENT

1. Receive digital monoscope pattern.
2. Set Picture Mode to PERSONAL.
3. Adjust focus VR to obtain the best focus at the centre of
the screen.
4. Change the receiving signal to white pattern and blue
back.
5. Confirm magenta ring is not noticeable. In case
magenta is very obvious, adjust the focus VR to take
balance of magenta ring and focus.
FLYBACK TRANSFORMER (T801)

2-4. G2(SCREEN) ADJUSTMENT

1. Input a dot signal from the pattern generator.
2. Set the Picture, Brightness and Colour to minimum.
3. Apply 170V DC from an external power supply to the
R,G and B cathodes of the CRT.
4. Adjust brightness to obtain cathode value to value
below.
5. Whilst watching the picture, adjust the G2 control
[SCREEN] located on the Flyback Transformer to the
point just before the flyback return lines disappear.
2-5. WHITE BALANCE ADJUSTMENT
1. Enter into Service Menu.
2. Input white pattern signal.
3. Set picture to PERSONAL mode.
4. Select WHBL "RDRV" and fix the value to 25 hex.
5. Adjust WHBL "GDRV" and "BDRV" and adjust the data
6. Adjust WHBL "BKOR" and "BKOG" and adjust the data
7. Set the offset settings for LIVE and GAME mode as
Adjusted value +2
Adjusted value -3
Adjusted value +2
Adjusted value +4
FOCUS
SCREEN
– 13 –
KV-21CT1B/21CT1U/21CT1E/21CT1K
for best white balance in highlight condition.
for best white balance cut-off condition.
stated in the table 1 below:-
OFFSET TABLE (Table 1)
Live Personal
T
BKOR (adjusted)
BKOG (adjusted)
25hex RDRV (25hex)
GDRV (adjusted)
BDRV (adjusted)
RM-W100
Game
T
Adjusted value
Adjusted value
25hex
Adjusted value -2
Adjusted value -6