NEC MultiSync 2A Service Manual page 31

1 1. POOR FOCUS
READJUST
FOCUS CONTROL
12. IMPURITY ON CRT SCREEN
POWER SW O FF AND WAIT FOR
5-10 MINUTES TO ALLOW
TH601 TO COOL OFF
POWER SW ON AND PRODUCE
VIDEO ON THE CRT CONFIRM
DEGAUSSING EFFECT
NO E F FECT
E F FECT BUT
NOT ENOUGH
MAKE SURE THAT THE
MONITOR IS DISTANT
FROM ANY STRONG
MAGNETIC FIELD
NO MAGNETICFIELD INTER FERENCE
OK
FOCUS CONTROL UNIT (T502:F.B.T)
CRT FAILURE
READJUST
PURITY MAGNET
CRT, DY, PURITY MAGNET
FAILURE
-29-
TH601, DEGAUSSING COIL
FAILURE