Daewoo DVT-14H2(T)FB/(T)PB service manual Main Tuner AGC, Screen, White Balance, Focus, Geometry

ALIGNMENT INSTRUCTIONS

1.MAIN TUNER AGC

1)Set a Pattern Generator with RF level 62 6 2 dBuV, 210.25 MHz.

2)Connect a OSCILLOSCOPE PROBE to P101 ( TUNER AGC INPUT ).

3)Adjust AGC UP/DOWN KEY the voltage drop about 1V DC over below it's maximum voltage.

2.SCREEN

1)Apply a COLOR BAR PATTERN SIGNAL.

2)Press the "SCREEN" KEY .

3)Connect a OSCILLOSCOPE PROBE to P901 ( CRT CATHODE R,G,B )

4)Adjust the screen volume on FBT such that the highest black level voltage 120V6 5Vdc . ∗ Another methode

1)Press "AV Key" in condition of AV no signal.

2)Press the "SCREEN" KEY .

3)Connect a OSCILLOSCOPE PROBE to P901 ( CRT CATHODE R,G,B )

4)Adjust the screen volume on FBT such that the highest black level voltage 140 V6 5Vdc .

3.WHITE BALANCE

1)Apply a COLOR BAR PATTERN SIGNAL.

2)Adjust the R,G,B UP/DOWN KEY of the other color which did not appear on the screen to obtain WHITE.

4.FOCUS

1)Apply a RETMA PATTERN SIGNAL.

2)Adjust the FOCUS VOLUME on FBT to obtain optimal resolution.

5.GEOMETRY

5.1 S-CORRECTION

1)Apply a CROSSHATCH PATTERN SIGNAL.

2)Adjust the S-CORR UP/DOWN KEY obtain the same distance between horizontal lines.

5.2 VERTICAL SLOPE

1)Apply a RETMA PATTERN SIGNAL.

2) Pressing the V-SLOPE +/- KEY,the lower half of the screen is blanked.

3)Adjust the border line of blanked picture coincident with the center marks of the pattern using the V-SLOPE +/- KEY.

5.3 VERTICAL CENTER

1) Apply a RETMA PATTERN SIGNAL.

2) Adjust the center line of pattern coincident with the mechanical center marks of the CRT using the V-CENTER +/- KEY.

5.4 VERTICAL SIZE

∗The V-CENTER adjustment has to be done in advance.

1) Apply a RETMA PATTERN SIGNAL.

2) Adjust the upperside of the pattern coincident with the mechanical center marks of the CRT using the V-SIZE +/- KEY.

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