Focus Adjustment; G2 (Screen) Adjustments; White Balance Adjustment - Sony TRINITRON KV-SW292M50 Service Manual

2-3. FOCUS ADJUSTMENT

FOCUS adjustment should be completed before W/B
adjustment.
1. Receive digital monoscope pattern.
2. Set Picture Mode to "DYNAMIC".
3. Adjust focus VR to obtain a just focus at the
center of the screen.
4. Change the receiving signal to white pattern
and blue back.
5. Confirm magenta ring is not noticeable. In case
magenta ring is obvious, then adjust FOCUS VR
to balance magenta ring and FOCUS.
Focus
Screen
FLYBACK TRANSFORMER (T503)

2-4. G2 (SCREEN) ADJUSTMENTS

1. Set the following condition:
- Picture and Brightness to "STANDARD".
- TV to Video mode.
- WHBL 16 "RGBB" to 01.
2. Connect R,G,B of the C board cathode to
oscilloscope.
3. Adjust Brightness to obtain the cathode value
to the value stated below.
Cathode setting voltage:
170 V ± 2 (VDC)
4. Adjust SCREEN VR on the FBT until the scanning line
disappears.
5. Finally set WHBL 016 "RGBB" back to 00.

2-5. WHITE BALANCE ADJUSTMENT

1. Set to Service Mode.
2. Input white raster signal using signal generator.
3. Set the following condition:
Picture "DYNAMIC", PICT 006 "WTS" to 00.
4. At Highlight condition, select WHBL 003 "GDRV"
and 004 "BDRV" with 1 and 4 button of the
remote commander then adjust the data with
3 and 6 button.
5. At Cutoff, select WHBL 000 "BKOR" and 001 "BKOG"
and adjust the data.
6. Perform adjustment at Hightlight and Cutoff condition
until it reaches its target.
7. Write data into memory by pressing [MUTING]➔-.
8. Finally set PICT 006 "WTS" back to its original data.
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KV-SW292M50/M61/M80/N60
RM-GA002