Daewoo 20q1 Manuel D’Utilisation

4

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”.

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 3.5V dc point its maximum voltage.(TDA8374A N1 VERSION)

Adjust AGC UP/DOWN KEY the voltage drop 1.5V dc over blow its maximum voltage(TDA8374A N3 VERSION)

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.

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)                     

160

5Vdc ( 20”, 21” )

with R,G,B UP/DOWN KEY.                                

130

5Vdc ( 14” )

4) Connect a OSCILLOSCOPE PROBE 

to P904 ( CRT CATHOD R, G, B ).  

5) Adjust the SCREEN VOLUME on FBT 

such that the highest black level voltage                                     

GND

160

5Vdc (20”, 21”), 130

5Vdc (14”). 

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 other color which did not appear 

on the screen  to obtain WHITE.  

1) Apply a RETMA PATTERN signal. 
2) Adjust the FOCUS VOLUME on FBT to obtain optimal resolution.