1-7-4
TD808EA
8. Sub-Brightness Adjustment
Purpose: To get proper brightness.
Symptom of Misadjustment: If Sub-Brightness is
incorrect, proper brightness cannot be obtained by
adjusting the Brightness Control.
Note: IQW Setup level --- 7.5 IRE
Use service remote control unit
1. Enter the Service mode. (See page 1-7-1)
Then input IQW signal from RF Input.
2. Press "PICTURE" button on the service remote con-
trol unit and Select "BRT" mode. (Display changes
"BRT," "CNT," "CLR," "TNT," and "V-TINT" cycli-
cally when "PICTURE" button is pressed.) Press
"CH
o
/
p
" buttons so that the bar is just visible (See
above figure).
3. Turn the power off and on again, using the main
power button on the TV unit.
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 us-
ing a degaussing coil.
3.
Input the Monoscope Pattern.
4.
Adjust the Focus Control on the FBT to obtain clear
picture.
Test Point
Adj. Point
Mode
Input
---
CH
o
/
p
buttons
RF
IQW
Tape
M. EQ.
Spec.
---
Pattern
Generator
See below
Figure
White
Black
Fig. 3
This bar
just
visible
Test Point
Adj. Point
Mode
Input
---
Focus Control
RF
Mono-
scope
Tape
M. EQ.
Spec.
---
Pattern
Generator
See below