Read Sony KV-AR253M50 Service Manual online
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KV-AR253M50
RM-W104
2-4. G2 (SCREEN) ADJUSTMENTS
1. Set the PICTURE to Normal.
2. Go to Service mode. Change WHBL 016 "RGBB" from 00
2. Go to Service mode. Change WHBL 016 "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
5. Adjust G2 (screen) on the FBT until picture shows the
point before cut off.
Cathode setting voltage:
170 V ± 2 (VDC)
170 V ± 2 (VDC)
2-3. FOCUS ADJUSTMENT
FOCUS adjustment should be completed before W/B
adjustment.
adjustment.
1. Receive digital monoscope pattern.
2. Set "Picture Mode" to "DYNAMIC".
3. a) Adjust focus VR so that the center of screen
2. Set "Picture Mode" to "DYNAMIC".
3. a) Adjust focus VR so that the center of screen
becomes just focus(29", 34").
b) Adjust focus VR so that the lion teeth
becomes just focus(25").
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.
MAGENTA RING and FOCUS.
FLYBACK TRANSFORMER (T503)
Focus
Screen
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".
3. Set Picture to "DYNAMIC".
i. Set PICT 006 WTS to 00h.
4. Select WHBL 002"RDRV" and adjust the value to 37
5. Select WHBL 003"GDRV" and 004 "BDRV"and adjust the
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 – OPB 6 to original data.
ii. PICT 006 – WTS to original data.
i. OPTM 006 – OPB 6 to original data.
ii. PICT 006 – WTS to original data.
Adjust
Offset
Offset
18000
t 12363 t 9300
BKOR
–2
–3
BKOG
+1
+2
RDRV
0
0
GDRV
–3
–8
BDRV
–8
–18
2-6. SUB BRIGHT ADJUSTMENT
1. Set to service mode.
2. Brightness set to 50%, Picture: Minimum.
3. Select WHBL 010 "SBRT" with
2. Brightness set to 50%, Picture: Minimum.
3. Select WHBL 010 "SBRT" with
1
and
4
, and adjust
'SBRT' data with
3
and
6
so that the third stripe from
right dimly lit.
4. Write into the memory by pressing [MUTING] then
-
.
5. Cut-off: 10 IRE
Slightly Glimmer: 20 IRE + 2 steps
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