Philips DELLP1230, Руководство по обслуживанию

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77
Dell P1230 M25P
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Circuit Description
EEPROM
as
E
D
I
D o
f
Data Disp
l
a
y
C
h
anne
l,
t
h
is
EEPROM
is a
l
so
use d to store a ll f actor y setting l i k e H- si z e , H- s h i f t , V- si z e , V- s h i f t , - - -
- etc .
A. PURITY AN
D C
ONVER
G
EN
C
E
C
ONTROL
Th ere are f our corner coi l s d e f ine d as purit y coi l s an d insta ll e d aroun d
t
h
e C
RT,
t
h
ese coi
l
s are
d
riven
by
f
our DC a
m
p
l
i
f
iers respective
ly,
t
h
e
y
provi
d
e t
h
e purit
y
correction via
d igita l contro l, t h e te m perature
co m pensation is a l so avai l a bl e f or environ m ent an d f unne l te m perature
c
h
ange
d.
Th e static convergence coi l s (4H/4V coi l) are co mb ine d w it h d e fl ection
y o k e , t h e ot h er t w o DC a m p l i f iers are use d to d rive t h e 4H/4V coi l via
d
igita
l
contro
l
to provi
d
e en
d-
user static convergence contro
l f
unction
.
E. MI C RO- C ONTROLLER
GENERAL DESCRIPTION:
Th e W e l tren d ET62P2 m icro - contro ll er is use d to contro l a ll re q uire d
f unctions o f m onitor an d store a ll necessar y d ata in EEPROM
M24 C 16, t h e m ost i m portant t h ing is t h at interrupt is use d to d etect
m
o
d
e c
h
ange ver
y f
ast
,
t
h
en re
q
uest t
h
e
M
C
U
to e
x
ecute protection
b e h avior f or h ori z onta l output transistor f ree f ro m h ig h transient pu l se
d uring m o d e c h ange .
HARDWARE DEFINITION:
a ) KEY BOAR D
Th ere are f ive k e y pa d s at t h e f ront o f m onitor f or t h e OS D contro l.
- OS D f unction k e y:
- E
nter
Depress it to enter or e
x
it t
h
e
OS
D
w
in
d
o
w
- UP
T
o se
l
ect t
h
e para
m
eters
wh
ic
h
are s
h
o
w
n at
OS
D
w
in
d
o
w.
- D OWN
T o se l ect t h e para m eters wh ic h are s h o w n at OS D w in d o w.
- RI
G
HT (+)
T o a dj ust t h e para m eter to rig h t or up si d e wh ic h is c h osen f ro m OS D
w in d o w.
- LEFT (-)
T o a dj ust t h e para m eter to l e f t or d o w n si d e wh ic h is c h osen f ro m
OS D w in d o w.
OS D w in d o w w i ll d isappear an d save a ll setting a f ter 30 secon d s .
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