Daewoo DTR-14D3VG, Service Manual

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4
1. AFT
1.1 Standard B/G,D/K,I
1) Set a Signal Generator with
- RF FREQUENCY = 38.9 MHz,
- RF OUTPUT LEVEL = 80
5 dBuV
- System = PAL / SECAM - B/G, D/K, I
NTSC - 3.58/4.43
2) Connect the Signal Generator RF Output to P101 (Tuner IF Output).
There must be no signal input to the tuner.
3) Press the “AFT” KEY and wait until the TV screen display “AFT OK”.
2. AGC
1) Set a Pattern Generator with RF LEVEL 63° 2 dBuV .
2) Connect a OSCILLOSCOPE PROBE to P102 (TUNER AGC INPUT).
3) Adjust AGC UP/DOWN KEY the voltage drop 2.0V±0.5V dc point its maximum voltage.
Alternative Method
1) Set a Pattern Generator with
- RF LEVEL 80 5 dBuV
- PAL CROSSHATCH
( without SOUND CARRIER )
2) Connect a OSCILLOSCOPE
( Bandwidth 100MHz ) PROBE
to P101 (TUNER IF OUTPUT).
3) Use AGC UP/DOWN KEY to obtain
an envelop amplitude 200 + 20 mVp-p.
3. SCREEN
1) Receive the color bar pattern and heat run over 15
minutes.
2) On the normal mode1 adjust the screen volume that
the horizontal line appears on the screen after push-
ing the AFT-L key on the SVC remote control unit.
3) Adjust the screen volume that the horizontal lines
reach the cut-off point
4. WHITE BALANCE
1) Set the TV to NOR I mode.
2) Set the R,G,B LEVEL to CENTER with R,G,B UP/DOWN KEY .
3) Adjust the R,G,B UP/DOWN KEY of the color which appears abnormally
on the screen to obtain WHITE BALANCE.
5. FOCUS
1) Apply a RETMA PATTERN signal.
2) Adjust the FOCUS VOLUME on FBT to obtain optimal resolution.
Alignment Instructions