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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
minimum
Note: J349F3(B-OIT) --- 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
control unit so that the carrier leakage B-Out (4.43
MHz) value becomes minimum on the
oscilloscope.
5. Turn the power off and on again.
Mode
Input
RF
Color Bar
(or Ext.)
Spec.
200 mVp-p Max.
Figure
Fig. 1
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
bluish or reddish in grayscale compared with PAL
signal.
Test Point
[PROG+/PROG-]
J361G4
Tape
Pattern Generator,
Analog Oscilloscope
---
(unusable Digital
Oscilloscope)
Note: J361G4 --- Main CBA
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-] button 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
1-6-3
Adj. Point
Mode
Ext.
buttons
M. EQ.
Spec.
1H
5 mV/Div (10:1 Prove)
Input
SECAM
Gray
Scale
---
Fig. 2
T6609EA
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