DAEWOO DTC21U1
Service Manual

Alignment Instructions
1. AFT
1) Set a signal Generator with - RF FREQUENCY = 38.9MHz, 34.2MHz (L� ) - RF OUTPUT LEVEL = 80 + 5dBuV _ - System = PAL / SECAM - B/G, D/K, I, H 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 in Service Mode and wait until the � Please wait�disappear on the TV screen.

2. AGC
1) Set a pattern Generator with - RF LEVEL = 60dBuV - 100% FULL COLOR BAR 2) Connect the Pattern Genetator RF Output to Tuner RF Input. 3) Press the � AGC�KEY in Service Mode and wait until the � Please wait�disappear on the TV screen.

3. SCREEN
1) Receive the Retma pattern and heat run over 15minutes. 2) On the normal mode1 adjust the screen volume that the horizontal line appears on the screen after pushing the � SCREEN� KEY on the SVC Mode. 3) Adjust the screen volume that the horizontal lines reach the cut-off point.

4. WHITE BALANCE
1) Set the TV to NOR 1 mode. 2) 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.

6. GEOMETRY 6.1 VERTICAL CENTER
1) Set the TV to NOR 1 mode. 2) Pressing the V-SIZE UP/DOWN KEY, the lower half of the screen is blanked. 3) Adjust the border line of blanked picture coincident with the mechanical center marks of the CRT using the V-CENTER UP/DOWN KEY.

6.2 VERTICAL SIZE
* The VERTICAL CENTER adjustment has to be done in advance. 1) Apply a RETMA PATTERN signal. 2) Set the TV to NOR 1 mode. 3) Adjust the upper part of the picture with the V-SIZE UP/DOWN keys.