1-7-5
TD001EA
9. Focus Adjustment
Purpose:
Set the optimum Focus.
Symptom of Misadjustment:
If Focus Adjustment is
incorrect, blurred images are shown on the display.
Note:
Focus VR (FBT) --- HV/DC Power Supply CBA
FBT= Fly Back Transformer
1.
Operate the unit more than 30 minutes
2.
Face the unit to the East and degauss the CRT us-
ing a degaussing coil.
3.
Input the Monoscope Pattern.
4.
Adjust the Focus Control on the FBT to obtain clear
picture.
10. 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.
Note:
D1311 Cathode (B-Out)--- Main CBA
1. Connect Oscilloscope to D1311 Cathode.
2. Input a color bar signal from RF input.
Enter the Service mode. (See page 1-7-1.)
3. Press "0" button on the remote control unit and
select C-TRAP Mode.
4. Press "CH
o
/
p
" buttons on the remote control
unit so that the carrier leakage B-Out (3.58MHz)
value becomes minimum on the oscilloscope.
5. Turn the power off and on again.
Test Point
Adj. Point
Mode
Input
---
Focus Control
RF
Mono-
scope
Tape
M. EQ.
Spec.
---
Pattern
Generator
See below
Test point
Adj. Point
Mode
Input
D1311
Cathode
(B-OUT)
CH
o
/
p
buttons
---
Color Bar
Tape
M. EQ.
Spec.
---
Oscilloscope
Pattern Generator
---
Figure
minimum
Fig. 4
