10104S CM23 GSIII
Electrical Instructions(continued)
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10. Purity adjustment
- Make sure the monitor is not exposed to any
external magnetic field.
- Produce a full red pattern on the screen, adjust the
purity magnet rings on the PCM assy (on CRT) to
obtain a complete field of the color red. This is done
by moving the two tabs (2-pole) in such a manner
that they advance in an opposite direction but at
2-pole purity magnet
the same time to obtain the same angle between
6-pole convergence magnet
the two tabs, which should be approximately 180
degree.4-pole convergence magnet
- Check by full green pattern and full blue patternDeflection Yoke
again to observe their respective color purity.
11. Static convergence
Introduction
4-poleBeam motion producced by the
Slight deviation in the static convergence can be
4-pole convergence magnet
corrected by using two permanent pairs of magnets
which are fitted around the neck of the CRT. These
are the 4-pole magnet and the 6-pole magnet.
S
The 4-pole magnet move the outermost electronSN
beams (R and B) parallel in the opposite direction
from the other. The 6-pole magnet moves the
BGRN BGR N
outermost electron beam (R, B and G) parallel in the
opposite direction from the other.
NS
The magnetic field of the above magnets do not affectS
the center of the CRT neck.
Beam displacementMagnetic flux
Setting
- Before the static convergence setting can be made,directionlines
the monitor must be switched on for 30 minutes.
- The focus setting must be made correctly.
- Signal: 640 * 480, 31.5 kHz/60 Hz mode.
- Set the tabs of the 4-pole magnet in the neutral
position. This is when the tabs are opposite one
6-poleBeam motion producced by the
another. In this position the magnets do not affect the
deflection of the R and B electron beams.6- pole convergence magnet
- Set the tabs of the 6-pole magnet in the neutral
N
position. This is when the tabs are opposite oneSN
another. In this position the magnets do not affect theSS
deflection of the R, B, and G electron beams.
NBS
- First set the 4-pole magnet optimally.BGRGR
- Then set the 6-pole magnet optimally.
NN
- If the convergence is not now optimal, then adjust to
SN
the optimal setting with the 4-pole magnet and then withS
the 6- Pole magnet again.
- Set the tabs of the 6-pole magnet in the neutral
position. This is when the tabs are opposite one
another. In this position the magnets do not affect the
deflection of the R, B, and G electron beams.
- First set the 4-pole magnet optimally.
- Then set the 6-pole magnet optimally.
- If the convergence is not now optimal, then adjust to
the optimal setting with the 4-pole magnet and then
with the 6- pole magnet again.
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