KV-21FT250
KV-21FT250
26
4-3. CONFIRMING SERVICE ADJUSTMENT
CHANGES
1. After completing adjustments, pull out the plug from the AC outlet,
then replace the plug in the AC outlet again.
2. Access
Service
Adjustment
Mode.
3. Using the buttons on the Remote Commander, locate the adjusted
items again to confi rm they were adjusted.
4-4. WHITE BALANCE ADJUSTMENTS
NOTE: FOCUS adjustment should be completed before White Balance
adjustment. (See 3-3. FOCUS)
1. Access
Service
Mode.
2. Input white raster signal using signal generator.
3. Set the following condition:
Picture “VIVID”, PICT 006, note value of “WTS”
then change to 00.
4. Press
2 or 5 to select the WHBL category.
5. Press
1 or 4 to display the 03 “GDRV” and 04 “BDRV” items.
6. Press
3 or 6 to adjust for the best white balance.
7. At Cutoff, select WHBL 000 “BKOR” and 001 “BKOG” and adjust
the data.
8. Perform adjustment at Highlight and Cutoff condition until it reaches
its target.
9. Press
MUTING then 0 to write into the memory.
10. Set PICT 006 “WTS” back to its original data.
4-5. PICTURE QUALITY ADJUSTMENTS
P Max/Contrast Adjustment
1. Set TV to Video mode.
2. Set Picture mode to “CUSTOM”.
3. Set
Color
Temp
to
“COOL”.
4. Input 1/5 small window to set
RF: 1/6 small window
Signal Strength > 70dBu
5. Set the following condition:
PICTURE 100%, COLOR 50%, BRIGHTNESS 50%
6. Connect an oscilloscope to pin
2
(B Output) of CN004.
7. Press
1 or 4 to display SADJ 000 “PMAX”, then adjust VR by
pressing 3 or 6 until the spec below:
KB = 134 + 1 Vpp: 134 - 2Vpp
KB
8. Select Wide Mode to “ON” in TV and Video mode and write “PMAX”
data - 8 steps (for models with V-Compression features only).
9. Press
MUTING then 0 to write into memory.
10. Set “PWL” and “BLBG” back to initial data.
(“PWL”:
01h
and
“BLBG”:
00h)
11. Press MUTING then 0 to write into memory.
Sub Color Adjustment
1. Set TV to Video mode.
2. Set Picture mode to “CUSTOM”.
3. Input PAL 100% Color Bar (CB) to TV set (OTHER MODEL).
4. INPUT NTSC 75% CB to TV set (NTSC MODEL).
5. Set PICT 006 “WTS” to 00h and Intelligent Picture to “OFF”.
6. Set the following condition:
PICTURE 50%, COLOR 50%, BRIGHTNESS 50%, HUE 50%,
SHARPNESS 50%
7. Connect an oscilloscope to pin
2
(B Output) of CN004.
8. Press
1 or 4 to select SADJ 004 “SCOL”, then adjust
V
B2
=V
B3
=V
B4
(for PAL),
VB1 = VB4 (for NTSC)
by pressing 3 or
6 , then write in the data +5 step offset.
VB2 = VB3 = VB4 (for PAL)
VB1 = VB4 (for NTSC)
(Difference is within 70mV)
VB1
VB2 VB3 VB4
VB1 VB2 VB3 VB4
9. Press
MUTING then 0 to write into memory.
10. Set “WTS” back to original data and Intelligent Picture to “ON”.
11. Copy no.9 data to PAL TV & DVD mode.
Sub Hue Adjustment
1. Set TV to Video mode.
2. Set Picture mode to “CUSTOM”.
3. Input NTSC 3.58 CB to TV set.
4. Set the following condition:
PICTURE 100%, COLOR 50%, BRIGHTNESS 50%, HUE 50%,
SHARPNESS 50%
5. Press
1 or 4 to select service mode and + 5 step offset from SADJ
004 “SCOL”.
6. Connect oscilloscope to pin
2
(B output) of CN004.
7. Press
1 or 4 to select SADJ 001 “SHUE”, then press 3 or 6 to
adjust the data.
8. Press
MUTING then 0 to write into memory.
9. Press
MUTING then 0 to write into memory.
10. For single system model with NTSC 4.43, select TV channel with
NTSC 4.43 and repeat items (3) to (8)
The highest level of V
B1
, V
B2
, V
B3
, V
B4
must be aligned at the same time.
The ideal difference between
V
B2
and V
B3
is within
±
80mV
VB1
VB2
VB3 VB4
80mV
