Tint/Color adjustmentProcedure:
Service DAC adjustment (TINT) (COLOR)Preset the following service DACs for best results:
Note: Color, tint adjustment sets the? CUT_R.. ... ... . 0200
reference settings for the user? CUT_G . ... ... . 0200
controls; It is important to read th?eCUT_B.. ... ... . 0200
procedures.? R-DR ... ... ... . 07 FF
(No rainbow pattern)? B-DR ... ... ... . 07 FF
Make sure that sub-contrast adjustment was finis1.hedConnect the oscilloscope to TP35 (L-Board).
prior to perform this adjustment2. In service mode for making electronic adjustment,
Preparation:select the sub-bright DAC ?BRIGH?.
1. Normalize the picture settings.3. Press the R-TUNE key on the remote.
2. Set picture mode to VIVID
4. Observe the oscilloscope waveform at horizontal
Procedure:
rate and adjust the service mode sub-bright DAC
1. Apply a color bar pattern.
?BRIGH? level un2t.i0l? 0.05Vabove DC ground
2. In service mode adjust ?TINT? sub-tint data so that
is measured, as indicated in Fig. 28.
the color does not become greenish or redish.
3. In service mode adjust ?COLOR? sub-color data so
that the color level is not too high (saturated) or too
2.0?0.05V DC
low (tending to black and white).
4. confirm that saturation and picture are normal
0V DC
(normal image).
Figure 28.TP35 Waveform
5. If image is not satisfactory, repeat adjustment until
the image is normal and natural.
5. Press the R-TUNE key on the remote.
6.Theimagecanbecomparedagainstothersetto
6. Connect the scope to GREEN cathode (KG) on the
seethe imagequality.
CRT-Board.
7. In the service mode for making electronic
Color temperature adjustment
adjustments, select the GREEN CUTOFF DAC
(B/W Tracking)
?CUT_G?.
Service DAC adjust
8. Press the R-TUNE key on the remote.
(CUT_R) (CUT_G) (CUT_B) (R -DR) (B-DR)
9. View scope trace at horizontal rate and adjust the
Minor touch-up method
service mode DAC ?CUT_G? level un1til70?2V
OBSERVE low and high brightness areas of a B/W
above DC ground is measured, as indicated in
picture for proper tracking. Adjust only as required for
Fig. 29.
good gray scale and warm highlights?.
10. Press the R-TUNE key on the remote.
1. LOW LIGHT areas - In service mode for making
11. Write the same ?CUT_G? data to ?CUT_R? and
electronic adjustments, select ?CUT_R?, ?CUT_G?,
?CUT_B?.
?CUT_B? and adjust the picture for gray.
2. HIGH LIGHT areas - In service mode for makin12.gPress the R-TUNE key on the remote.
electronic adjustments, select ?CUT_G?, ?C13.UT_BT?urn the screen control (part of FBT) slowly
and adjust the picture for warm whites.clockwise until a slightly color horizontal line
appears.
Complete adjustment14. Adjust ?CUT_R? and ?CUT_B? until the horizontal
line becomes white.
Preparation:
15. Press the R-TUNE key on the remote
1. Turn the receiver ?ON? and allow 10 minutes warm
up at high brightness.
2. Apply a color bar signal with color ?OFF?.
3. Turn the SCREEN control (part of FBT T551) fully
counterclockwise.170?2V DC
0V DC(Ground)
Figure 29.KG Waveform
16. Apply a normal image and check for a good
picture.
17. Exit the service mode.
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ACEC
