Durabrand T6605VF Service Manual page 26

3. C-Trap Adjustment
Purpose: To get minimum leakage of the color signal
carrier.
Symptom of Misadjustment: If C-Trap Adjustment is
incorrect, stripes will appear on the screen.
Test point Adj. Point
J349F3 PROG+/PROG-
(B-OUT) buttons
Tape M. EQ.
Oscilloscope,
---
Pattern Generator
Figure
minimum
Note: J349F3 (B-Out)--- Main CBA
1. Connect Oscilloscope to J349F3.
2. Input a color bar signal from RF (or Ext.) input.
Enter the Service mode. (See page 1-6-1.)
3. Press [0] button on the remote control unit and
select C-TRAP mode.
4. Press [PROG+/PROG-] buttons on the remote con-
trol unit so that the carrier leakage B-Out
(4.43MHz) value becomes minimum on the oscillo-
scope.
5. Turn the power off and on again.
Mode Input
RF
Color Bar
(or Ext.)
Spec.
200mVp-p Max.
Fig. 1
1-6-3
4. SECAM Black Level Adjustment
Purpose: To set Black Level of the SECAM signal R-
Y/B-Y to Ref. level.
Symptom of Misadjustment: If Black Level of the
SECAM signal R-Y/B-Y is incorrect, the picture is blu-
ish or reddish in grayscale compared with PAL signal.
Test
Adj. Point
point
PROG+/PROG-
J361G4
buttons
Tape M. EQ.
Pattern Generator,
--- Analog Oscilloscope (unus-
able Digital Oscilloscope)
1. Degauss the CRT and allow CRT to operate for 20
minutes before starting the alignment.
2. Input the SECAM Gray Scale signal from Ext.
input.
3. Enter the service mode. (See page 1-6-1.)
4. To enter the C/D/S mode, press [VOL-] on the
remote control unit.
5. To select SBR (SECAM Black Level R-Y), press [6]
button on the remote control unit.
6. Press [PROG+/PROG-] buttons to adjust Y signal
to the black ref. level.
7. To select SBB (SECAM Black Level B-Y), press [7]
button on the remote control unit.
8. Press [PROG+/PROG-] buttons to adjust Y signal
to the black ref. level.
Y Signal
1H
Black REF. Level
1H
Mode Input
SECAM
Ext. Gray
Scale
Spec.
---
1H
5mV/Div (10:1 Prove)
Fig. 4
T6605EA