Sharp 25WG3, Руководство по обслуживанию

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9
25WG3
1.
Switch
TV to
VIDEO MODE, Blue Bac
k:
OFF
, Without
Video
Signal.
2.
Connect the oscilloscope to
TP851.
(Use a 10:1 probe) Range: 500mV/div Sw
eep Time:
5ms/div
Press "DC" mode
3.
Using the remote controller
, call
NORMAL mode
.
4.
Adjust Screen
VR so that the tip of
signal reach 2.5Vdc
±
0.1Vdc.
CUT OFF ,
WHITE B
ALANCE,
SUB - BRIGHT
, & FOCUS ADJUSTMENT
.
NO
ADJUSTMENT POINT
1
CR
T Cut - OFF ADJ
.
(I
2
C B
US CONTR
OL)
ADJUSTMENT CONDITION/PROCEDURE
WAVEFORM OR OTHERS
*
Bef
ore adjustment , mak
e
sure that this adjustment with the initial b
us data
"White P
oint (G)" &
"White P
oint (B)" are 32.
Figure 5
5.
Receiv
e the MONOSCOPE P
A
TTERN
signal.
6.
Call the "BKGD" in SER
VICE mode
.
7.
Adjust "White P
oint (G)", "White P
oint
(B)" data to ha
v
e
a colour temper
ature
of 12300k (White) Note
.
2
White Balance ADJ
.
(I
2
C B
US CONTR
OL)
Note :
White P
oint (G)
UP " 2 " KEY DO
WN " 5 " KEY
White P
oint (B)
UP " 3 " KEY DO
WN " 6 " KEY
As the abo
v
e
data can be
UP / DO
WN.
*12300k
x=272 y=275
(Minolta Colour Analyz
er
CA-100)
8.
Receiv
e the "CR
OSSHA
TCH
P
A
TTERN" Signal.
9.
Call the "SUB BRI" in SER
VICE mode
.
10.
Adjust the "SUB-BRI" b
us data, so that
the No
. 2 line inside the windo
w area
will disappear
.
Note:
Bef
ore star
ting this adjustment,
war
m
up the unit f
or 30 min
utes or
longer at a beam current of 1200 ~ 1300
µ
A.
3
SUB- BRIGHT ADJ
.
(I
2
C B
US CONTR
OL)
Figure 6
11.
Receiv
e the "MONOSCOPE P
A
TTERN"
Signal.
12.
Press P-NORMAL k
e
y.
13.
Connect the DC Milliammeter betw
een
TP601 (-) and
TP602 (+).
(Full Scale:
3.0 mA Range).
14.
Beam current Must be 1200
±
100
µ
A.
4
BEAM CURRENT CHECK
1.
Receiv
e the "MONOSCOPE P
A
TTERN"
signal.
2.
Using the remote control, call NORMAL mode
.
3.
Adjust the FOCUS control so that the shaded area of screen be in optimal f
ocus
.
5
FOCUS ADJ
.
Figure 7
1.
Receiv
e the 50Hz "MONOSCOPE
P
A
TTERN" signal.
2.
Call the "V
-SIFT 50" in SER
VICE mode
.
3.
Increase or decrease the "V
-SIFT 50"
b
y
using
V
olume UP/DO
WN k
e
y to
adjust or align the screen center with the CR
T’
s geometr
ical center
.
4.
Receiv
e the 60 Hz "MONOSCOPE
P
A
TTERN" signal.
5.
Call the "V
-SIFT 60" in SER
VICE mode
.
6.
Increase or decrease the "V
-SIFT 60"
b
y
using
V
olume UP/DO
WN k
e
y to
adjust or align the screen center with the CR
T’
s geometr
ical center
.
V
-SHIFT 60
(I
2
C BUS CONTR
OL)
1.
Receiv
e the "MONOSCOPE P
A
TTERN"
signal.
2.
Call the "V
-AMP" in SER
VICE mode
.
3.
Increase or decrease the "V
-AMP" b
y
using the v
olume UP/DO
WN k
e
y to
adjust the
V
e
rtical siz
e until it is 8.5%
o
v
erscan.
3
V
-AMP
(I
2
C BUS CONTR
OL)
O
VER SCAN:
8.5%
±
1.5 %
1.
Receiv
e the 50Hz "MONOSCOPE
P
A
TTERN" signal.
2
.
Call the "H-SIFT 50" IN SER
VICE MODE.
3.
Increase or decrease the "H-SIFT 50" b
y
using the
V
olume UP/DO
WN k
e
y to adjust
or align the left, and r
ight sides of screen
are equal o
v
erscan siz
e.
4.
Receiv
e the 60Hz "MONOSCOPE
P
A
TTERN" signal.
5
.
Call the "H-SIFT 60" IN SER
VICE MODE.
6.
Increase or decrease the "H-SIFT 60" b
y
using the
V
olume UP/DO
WN k
e
y to adjust
or align the left and r
ight sides of screen
are equal o
v
erscan siz
e.
4
H-SHIFT 50 (I
2
C B
US CONTR
OL)
H-SHIFT 60 (I
2
C BUS CONTR
OL)
SPEC:
±
2mm
SPEC:
±
2mm
1.
Receiv
e the "MONOSCOPE P
A
TTERN"
signal.
2.
Call the "V
-SLOPE" in SER
VICE mode
.
3.
Increase or decrease "V
-SLOPE" b
y
using
V
olume k
e
y so that the center line
of picture matches with the edge of b
lanking line
.
HORIZONT
AL,
VER
TICAL,
DEFLECTION LOOP ADJUSTMENT
.
NO
ADJUSTMENT POINT
1
V
-SLOPE ADJ
.
(I
2
C B
US CONTR
OL)
ADJUSTMENT CONDITION/PROCEDURE
WAVEFORM OR OTHERS
SPEC:
±
1
SCANNING LINE
2
V
-SHIFT 50
(I
2
C B
US CONTR
OL)
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