Precautions Upon Adjustment - Sony VPH-G90U Service Manual

3-1. PRECAUTIONS UPON
ADJUSTMENT
1. When the CRT (a cathode-ray tube) has been replaced,
fix the DY (deflection yoke) to the funnel and decide
the position of the neck assembly before beginning
adjustments.
2. When the power is turn off, the service mode is
canceled.
3-2. ATTACHING THE NECK ASSEMBLY
1. Fix DY to the CRT funnel, then fix the Magnet Focus
Coil.
2. Tentatively secure the 2-pole and 4-pole magnet
assembly in contact with the Magnet Focus Coil.
3. Attach the CB board.
Fannel
Main DY
Sub DY
Wedge
Spacer (DY)
VPH-G90E/G90U/G90M
SECTION 3
SET-UP ADJUSTMENTS
3-3. ADJUSTING CONDITIONS
3-3-1. Projecting System
Place the unit on a table which satisfies the projection
conditions as shown in the figure.
Center
1,071
Mg focus
2-pole and 4-pole
magnet
Basic Optical System
VPS-120F
3,373
Lens center
3,278
Inclination Angle at Top and Bottom
(Side view)
+
0 d
_
Left and Right Tilt of the Unit
(Top view)
Unit
Unite: mm
VPH-G90
Specifictions:
+ 0.2 d
Within 0
_ 0.5 d
+
0 d
_
Within 0 ±0.5 d
3-1