Magnavox MC132EMG/17, Руководство по обслуживанию

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1-6-6 T5515EA
11. 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 the monoscope pattern.
4. Adjust the Focus Control on the FBT to obtain a
clear picture.
12. 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).
1. Insert the test tape (VFMS0001H6).
2. Set the unit to the stop condition.
3. Enter the Service mode. (See page 1-6-1.)
4. Press [PAUSE] button on the service remote
control unit.
5. Confirm that indication of OSD is 6.5H.
13. CCS Text Box Location
When replacing the CRT, the CCS Box might not stay
in the appropriate position. Then, replace
microcomputer.
Note: This adjustment automatically done by the
microcomputer.
The following 2 adjustments normally are not
attempted in the field. They should be done only
when replacing the CRT then adjust as a
preparation.
14. Purity Adjustment
Purpose: To obtain pure color.
Symptom of Misadjustment: If Color Purity
Adjustment is incorrect, large areas of color may not
be properly displayed.
* This becomes RED COLOR if the [7] button is
pressed while in service mode.
1. Set the unit facing East.
2. Operate the unit for over 30 minutes before
adjusting.
3. Fully degauss the unit using an external
degaussing coil.
4. Set the unit to the AUX mode which is located
before CH2, then input a red raster from video in.
5. Loosen the screw on the Deflection Yoke Clamper
and pull the Deflection Yoke back away from the
screen. (See Fig. 7.)
6. Loosen the Ring Lock and adjust the Purity
Magnets so that a red field is obtained at the
center of the screen. Tighten Ring Lock. (See Fig.
6, 7.)
7. Slowly push the Deflection Yoke toward the bell of
the CRT and set it where a uniform red field is
obtained.
8. Tighten the clamp screw on the Deflection Yoke.
Adj. Point Input
Focus Control Monoscope
M. EQ. Spec.
Pattern Generator See below
Adj. Point Input
Deflection Yoke Purity Magnet *Red Color
M. EQ. Spec.
Pattern Generator See below.
Figure
Fig. 6
GREEN RED BLUE
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