Durabrand T6609BK, Руководство по обслуживанию

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1-6-7 T6609EA
12. 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) --- H.V./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
using a Degaussing Coil.
3. Input the monoscope pattern.
4. Adjust the Focus Control on the FBT to obtain
clear picture.
13. Head Switching Position
Adjustment
Purpose: Determine the Head Switching Position
during Playback.
Symptom of Misadjustment: May cause Head
Switching Noise or Vertical Jitter in the picture.
Note: Unit reads Head Switching Position
automatically and displays it on the screen
(Upper Left Corner).
Manual Adjustment
1. Enter the Service mode. (See page 1-6-1.)
2. Playback the test tape (FL6A).
3. Press the number [5] button on the remote control
unit.
4. The Head Switching position will display on the
screen; if adjustment is necessary follow step 4.
7.0H (448
µ
s) is preferable.
5. Press [PROG+/PROG-] buttons on the remote
control unit if necessary. The value will be
changed in 0.5H steps up or down. Adjustable
range is up to 9.5H. If the value is beyond
adjustable range, the display will change as:
Lower out of range: 0.0H
Upper out of range: -.-H
6. Turn the power off and on again.
Auto Adjustment
1. Load the test tape (FL6A) that have been recorded
the Head Switching Position Value.
2. Enter the Service mode. (See page 1-6-1.)
3. Press [3] button on the remote control unit in the
tape stop mode. The unit playback and adjust the
Head Switching Position automatically.
4. The adjusting report appears on upper left corner
of the screen with blueback.
In case of adjusting correctly: the Head Switching
Position Value recorded in the test tape (FL6A) is
indicated with green.
In case of adjusting incorrectly: “NG” (red) is
indicated with ejecting tape.
Fig. 5
Test Point Adj. Point Mode Input
Screen Focus Control
RF
(or Ext.)
Monoscope
Tape M. EQ. Spec.
---
Pattern
Generator
See below.
NG
Incorrect
7.0H
Correct
TVCR TVCR