Focus Adjustment; G2 (Screen) Adjustments; White Balance Adjustment; Sub Bright Adjustment - Sony TRINITRON KV-SA28M36 Service Manual

KV-SA28M36
RM-W107

2-3. FOCUS ADJUSTMENT

FOCUS adjustment should be completed before W/B
adjustment.
1. Receive digital monoscope pattern.
2. Set "Picture Mode" to "DYNAMIC". (Multi), Set "Picture
Mode to VIVID (NTSC).
3. a) Adjust focus VR so that the center of screen
becomes just focus(28", 29", 32", 34").
b) Adjust focus VR so that the lion teeth
becomes just focus(25" ONLY).
4. Change the receiving signal to white pattern and blue
back.
5. Confirm Magenta ring is not noticeable. In case
magenta ring is obvious, adjust FOCUS VR to balance
between MAGENTA RING and FOCUS.
Focus
Screen
FLYBACK TRANSFORMER (T506)

2-4. G2 (SCREEN) ADJUSTMENTS

1. Set the PICTURE to Normal.
2. Go to Service mode. Change RGBB from 00 to 01.
3. Connect R,G,B of the C board cathode to the
oscilloscope.
4. Adjust cathode voltage to the value below.
5. Adjust G2 (screen) on the FBT until picture shows the
point before cut off.
Cathode setting voltage:
170 V ± 2 (VDC)

2-5. WHITE BALANCE ADJUSTMENT

1. Set to Service Mode (Refer Section 3-1:
ADJUSTMENTS WITH COMMANDER).
2. Input white raster signal.
3. Set Picture to DYNAMIC.
i. Set PICT 006 WTS to 00h (all models except SA and
SR series).
ii. For SA and SR series, set OPTB 006 : OPB6 to 00.
4. Select WHBL 002"RDRV" and adjust the value to 37.
5. Select WHBL 003"GDRV" and 004 "BDRV"and adjust
the data for the best white balance in highlight condition.
6. Adjust WHBL 000 "BKOR" and 001 "BKOG"and adjust
the data for best white balance cut-off condition.
7. Write into the memory by pressing [MUTING] then
8. Write offset data for other mode.
After adjustment, please reset:
i. OPTM 006 – OPB6 to original data (SA and SR
series).
ii. PICT 006 – WTS to original data (All models except
SA and SR series)
Adjust Offset
18000 t 12363 t 9300
BKOR –2
BKOG +1
RDRV
GDRV –3
BDRV –8

2-6. SUB BRIGHT ADJUSTMENT

1. Set to service mode.
2. Brightness set to 50%, Picture: Minimum.
3. Select WHBL 010 "SBRT" with
'SBRT' data with
3
right dimly lit.
4. Write into the memory by pressing [MUTING] then
5. Models cut-off:
Slightly Glimmer: 20 IRE
– 12 –
Offset
–3
+2
0 0
–8
–18
and , and adjust
1 4
and so that the third stripe from
6
10 IRE
.
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