Daewoo 14Q2 Service Manual - Alignment Instructions
Remark: A service remocon(R-30SVC) is needed to align the set.
1. AFT
1.1 Standard B/G,D/K,I and L
1) Set a Signal Generator with
- RF FREQUENCY = 38.9 MHz,
- RF OUTPUT LEVEL = 80
°
5 dBuV
- System = PAL / SECAM - B/G,
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”.
1.2 Standard SECAM-L’ (France VHF-Low)
Above mentioned “1.1” adjustment has to be done in advance.
1) Set a Signal Generator with
- RF FREQUENCY = 34.2 MHz,
- RF OUTPUT LEVEL = 80
°
5 dBuV
- System = SECAM - L’
2) Connect the Signal Generator RF Output to P101 (Tuner IF Output).
There must be no signal input to the tuner.
3) Press the “L’ AFT” KEY and wait until the TV screen display “L AFT OK”.
2. AGC
1) Set a Pattern Generator with RF LEVEL 63
°
2 dBuV .
2) Connect a OSCILLOSCOPE PROBE to P101 (TUNER AGC INPUT).
3) Adjust AGC UP/DOWN KEY the voltage drop 1V dc over below 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 + 50 mVp-p.
3. SCREEN
1) Apply a COLOR BAR pattern signal.
2) Set the CONTRAST, BRIGHTNESS
Black level
to MAX, COLOR to MIN.
3) Set the R,G,B LEVEL to CENTER (31/63)
with R,G,B UP/DOWN KEY.
130
°
5Vdc
4) Connect a OSCILLOSCOPE PROBE
to P906 ( CRT CATHOD R, G, B ).
5) Adjust the SCREEN VOLUME on FBT
such that the highest black level voltage,
GND
130
°
5Vdc.
Alignment Instructions
5