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9. Focus Adjustment
Purpose: Set the optimum Focus.
Symptom of Misadjustment: If Focus Adjustment is
incorrect, blurred images are shown on the display.
Test Point
Adj. Point
---
Focus Control
Tape
M. EQ.
Pattern
---
Generator
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 us-
ing a degaussing coil.
3. Input monoscope pattern.
4. Adjust the Focus Control on the FBT to obtain a
clear picture.
Mode
Input
Mono-
RF
scope
Spec.
See below
1-6-6
10. H f o Adjustment
Purpose: To get correct horizontal frequency.
Symptom of Misadjustment: If H f 0 adjustment is
incorrect, skew distortion will appear on the screen.
Test Point
Adj. Point
CH o / p button
R1583
["H-ADJ"] MODE
Tape
M. EQ.
Frequency
---
Counter
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 be-
fore CH2 and no input is necessary. Enter the Ser-
vice 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 shows
15.734 kHz±300Hz.
6. Turn the power off and on again, using the main
power button on the TV unit.
Mode
Input
Video
---
Spec.
15.734kHz±300Hz
T9003EA
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