Focus Adjustment; G2(Screen) Adjustment; White Balance Adjustement - Sony KV-21FQ10K Service Manual

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.
FOCUS
SCREEN
Cathode setting voltage:
170 V ± 2 (VDC) — 21"
KV-21FQ10B/21FQ10E/21FQ10K/21CL10B
KV-21CL10E/21CL10K/21CL10U/21CL1K
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
for best white balance in highlight condition.
6. Adjust WHBL "BKOR" and "BKOG" and adjust the data
for best white balance cut-off condition.
7. Set the offset settings for LIVE and GAME mode as
stated in the table 1 below:-
OFFSET TABLE (Table 1)
Live
T
Adjusted value +2
Adjusted value -3
25hex
Adjusted value +2
Adjusted value +4
– 15 –
Personal Game
T
BKOR (adjusted) Adjusted value
BKOG (adjusted) Adjusted value
RDRV (25hex) 25hex
GDRV (adjusted) Adjusted value -2
BDRV (adjusted) Adjusted value -6
RM-W100