Philips MAGNAVOX 20MC4304 Service Manual page 211

13. V. Shift Adjustment
Purpose: To obtain correct vertical position of screen
image.
Symptom of Misadjustment: If V. position is
incorrect, vertical position of image on the screen may
not be properly displayed.
Test Point Adj. Point
[CH. o / p]
---
buttons
Tape M. EQ.
--- Pattern Generator
1. Enter the Service mode. (See page 1-7-1.)
Press [9] button on the remote control unit and
select V-P mode. (Press [9] button then display will
change to V-P and V-S).
2. Input monoscope pattern.
3. Press [CH. o / p] buttons on the remote control
unit so that the top and bottom of the monoscope
pattern are equal to each other.
14. V. Size Adjustment
Purpose: To obtain correct vertical height of screen
image.
Symptom of Misadjustment: If V. Size is incorrect,
vertical height of image on the screen may not be
properly displayed.
Test Point Adj. Point
[CH. o / p]
---
buttons
Tape M. EQ.
--- Pattern Generator
1. Enter the Service mode. (See page 1-7-1.)
Press [9] button on the remote control unit and
select V-S mode. (Press [9] button then display will
change to V-P and V-S).
2. Input monoscope pattern.
3. Press [CH. o / p] buttons on the remote control
unit so that the monoscope pattern is 90±5% of
display size and the circle is round.
Mode Input
--- Monoscope
Spec.
---
Mode Input
--- Monoscope
Spec.
90±5%
1-7-8
15. 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. Playback test tape (VFMS0001H6).
2. Enter the Service mode. (See page 1-7-1.)
Then press the number [5] button on the remote
control unit.
3. The Head Switching position will display on the
screen; if adjustment is necessary follow step 4.
6.5H(412.7µs) is preferable.
4. Press [CH. o] or [CH. p] button 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
T1102EA