Impurity On Crt Screen - NEC MultiSync 3D JC-1404HME Service Manual

(5-9) IMPURITY ON CRT SCREEN
DISCONNECT 2 ON
SW. REG. PWB PWE-253A
,
POWER SW ON AND
PRODUCE VIDEO ON CRT
CONNECT 2 MANUALLY,
AND CONFIRM DEGAUSSING
EFFECT THEN
EFFECT, BUT
NOT ENOUGH
NO EFFECT
MAKE SURE THAT THE
MONITOR IS DISTANT
FROM ANY STRONG
MAGNETIC FIELD
'
TH601, CONNECTOR 2,
DEGAUSSING COIL
FAILURE
NO MAGNETIC FIELD INTERFERENCE
I
READJUST
PURITY MAGNET
h•
i
OK CRT, DY, PURITY MAGNET
FAILURES
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