1-6-5
T8100EA
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) --- Main CBA,
FBT= Fly Back Transformer
1.
Operate the unit more than 30 minutes
2.
Face the unit to the East and degauss the CRT
using a degaussing coil.
3.
Input monoscope pattern.
4.
Adjust the Focus Control on the FBT to obtain a
clear picture.
10. H f
0
Adjustment
Purpose:
To get correct horizontal frequency.
Symptom of Misadjustment:
If H f
0
adjustment is
incorrect, skew distortion will appear on the screen.
Note:
R1583 --- Main CBA
Use Service remote control unit.
1. Connect frequency counter to R1583 and ground.
2. Set the unit to the VIDEO mode which is located
before CH2 and no input is necessary. Enter the
Service mode. (See page 1-6-1.)
3. Operate the unit for at least 20 minutes.
4. Press "2" button on the Service remote control unit
and select H-ADJ mode.
5. Press "CH.
o
/
p
" buttons on the Service remote
control unit so that the display will change "0" ~ "7."
At this moment, choose display "0" ~ "7" when the
frequency counter display is closest to 15.734
kHz±300Hz.
6. Turn the power off and on again, using the main
power button on the TV unit.
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
R1583
CH.
o
/
p
button
["H-ADJ"] MODE
Video
---
Tape
M. EQ.
Spec.
---
Frequency
Counter
15.734kHz±300Hz
