Emerson EWC09D5B, Руководство по обслуживанию

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1-6-5 TD300EA
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 1-6-1.)
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