Durabrand DCT1303R Service Manual page 20

4. Black Level Adjustment
Purpose: Set Black Level
Symptom of Misadjustment: If Black level is incor-
rect, Proper brightness can not be obtained by adjust-
ing the Brightness Control.
Note: TP300 (GND,) D316 (Cathode) --- MAIN CBA
1. Enter the Service mode. (See page 5-1.)
2. Press "MENU" button on the service remote con-
trol unit and select "BRT" mode. (Display changes
"BRT," "CNT," "CLR" and "TNT" cyclically when
MENU button is pressed.)
3. Press "CH o / p" buttons on the service remote
control unit so that the value of "BRT" becomes
128.
4. Turn the power off and on again, using the main
power button on the TV unit.
5. V. Size Adjustment
Purpose: To obtain correct vertical width of screen image.
Symptom of Misadjustment: If V.Size is incorrect, vertical
size of image on the screen may not be properly displayed.
Test Point Adj. Point
Screen Control
CH o / p
---
buttons [ V-S ]
Mode
Tape M. EQ.
--- Monoscope
Note: Use service remote control unit.
1. Operate the unit for at least 20 minutes.
2. Enter the Service mode. (See page 5-1)
3. Receive the Monoscope Pattern.
4. Press "9" button on the service remote control unit
and select "V-S" mode. (Display changes "V-S" and
"V-P" cyclically when "9" button is pressed.)
5. Press "CH o / p" buttons on the service remote
control unit so that the monoscope pattern will be
90±5% of display size and the circle is round.
6. Turn the power off and on again, using the main
power button on the TV unit.
Mode Input
Mono-
RF
scope
Spec.
90±5%
5-3
6. V. Position Adjustment
Purpose: To obtain correct vertical width of screen
image.
Symptom of misadjustment: If V. Position is incor-
rect, vertical height of image on the screen may not be
properly displayed.
Test Point Adj. Point
--- Screen Control
CH o / p
buttons
[ V-P ] Mode
Tape M. EQ.
--- Monoscope
Note: Use service remote control unit
1. Operate the unit for at least 20 minutes.
2. Enter the Service Mode. (See page 5-1)
3. Receive the Monoscope Pattern.
4. Press "9" button on the service remote control unit
and select "V-P" mode. (Display change "V-S" and
"V-P" cyclically when "9" button is pressed.)
5. Press "CH o / p" buttons on the service remote
control unit so that the top and bottom of the mono-
scope pattern will be equal of each other.
6. Turn the power off and on again, using the main
power button on the TV unit.
7. H. Position Adjustment
Purpose: To obtain correct horizontal position of
screen image.
Symptom of Misadjustment: If H. Position is incor-
rect, horizontal position of image on the screen may
not be properly displayed.
Test Point Adj. Point
Screen Control
CH o / p
---
buttons
[ H-P ] Mode
Tape M. EQ.
--- Monoscope
Note: Use service remote control unit
1. Operate the unit for at least 20 minutes.
2. Enter the Service mode. (See page 5-1)
3. Receive the Monoscope Pattern.
4. Press "8" button on the remote control unit and se-
lect "H-P" mode.
5. Press "CH o / p" buttons on the service remote
control unit so that the monoscope pattern will be
90±5% of display size and the circle is round.
6. Turn the power off and on again, using the main
power button on the TV unit.
Mode Input
RF Mono-
scope
Spec.
90±5%
Mode Input
Mono-
RF
scope
Spec.
90±5%
L6315EA