DAEWOO - DTP-14V1/V2/V3/V5/C3/C4/C5TF/20V1/V3/C4/C5TF/21V1/V2/V4/V6/C6TF _ SERVICE MODE _ ADJUSTMENTS
TO ENTER SERVICE MODE
- Select the Pr 91.
- Adjust “ Sparpness “ to 0.
- Enter the service mode using the following keys. {R à G à MENU}
SCREEN VOLTAGE ADJUSTMENT
- Receive the Retma pattern and heat run over 15 minutes.
- Adjust the “R, G BIAS, R, G DRIVE” to 0, “B BIAS” to 127, “B DRIVE” to 32. Adjust the screen volume that the Retma pattern reachs the cut-off point.
WHITE BALANCE ADJUSTMENT
- Receive the Full white pattern and heat run over 15minutes.
- Adjust the picture control at the point “X” value of white balance instrument in 20cd/m
- Enter the service mode.
- Adjust “R BIAS, G BIAS” to x=288, y=301.
- In order to exit the service mode power off the TV set and power on.
- Set the TV set to “Normal I” mode(20/21 inch) or set to “Normal II” mode(14 inch)
- Enter the service mode.
- Adjust “R DRIVE, G DRIVE” to x=288, y=301.
- Repeat above process until the white balance value to x=288, y=301, X=20, x=288, y=301, X=200 (approximate) in 2 -8).
AGC ADJUSTMENT
- Set a pattern Generator with - RF LEVEL = 60dBuV- 100% FULL COLOR BAR
- Connect the Pattern Generator RF Output to tuner RF input.
- Connect the probe of oscilloscope in AGC pin of tuner.
- Adjust the AGC point to MAX - 1V.
Simple Method
- Receive the pattern.
- Locate the cusor in “AGC” and adjust using the [VOL + or VOL -] keys.
- Adjust the point there is no noise in about 60dBuV and no beat in about 90dBuV
AFT ADJUSTMENT
- Set a signal Generator with - RF FREQUENCY = 38.9MHz, 34.2MHz (L’) - RF OUTPUT LEVEL = 80+/-5dBuV - System = PAL for 38.9MHz. SECAM-I for 43.2MHz.
- Connect the Signal Generator RF Output (PAL 38.9MHz) to P101 (Tuner IF Output). There must be no signal input to the tuner.
- Locate the cusor to “VCO” in Service Mode Menu, then press the [Vol +] key and wait until the [Please wait] disappear on the TV screen.
- Connect the Signal Generator RF Output (SECAM-L 34.2MHz) to P101 (Tuner IF Output).
- Locate the cusor to “VCO-L” in Service Mode Menu, then press the [Vol +] key and wait until the [Please wait] disappear on the TV screen.
If EEPROM(I702) has been changed; Option data has to be change and all alignment function has to be readjusted.
