Sharp 21G-FX10L, Service Manual

Page: 16 / 49

21G-FX10L
5 – 9
CLOSED CAPTION ADJUSTMENT
NO ADJUSTMENT POINT ADJUSTMENT CONDITION / PROCEDURE WAVEFORM OR OTHERS
1 CLOSED CAPTION (1) Receive US4 CH LION HEAD Signal (NTSC 60 Hz)
SET UP (2) Go to service mode, choose service data
V22
.
(3) Adjust the V22 bus data to have a balance position to spec of A=B
(4) After the left and right symmetrical then
V22
data reduce 5 step
A B
SCREEN, WHITE BALANCE, SUB-BRIGHTNESS & SUB-CONTRAST ADJUSTMENT(1)
NO ADJUSTMENT POINT ADJUSTMENT CONDITION / PROCEDURE WAVEFORM OR OTHERS
1 SCREEN (1) Set the service data before adjust CRT cutoff as follows:
NOTE:
ADJUSTMENT
a) V01 : 127
Service data
R/C key (Hex)
(I2C BUS CONTROL)
b) V04 : 127
R-cutoff up A9
c) V15 : 127
R-cutoff down 69
d) V16 : 127
G-cutoff up E9
e) V17
: 127
G-cutoff down 19
f) V18 : 64
B-cutoff up
99
g) V19 : 64
B-cutoff down 59
(2) Receive the window pattern or US4 CH LION HEAD Signal (NTSC 60 Hz)
(3) Go to service mode, get in Y-mute by R/C and set
V23
to "1"
(4) Adjust the Screen so that cut-off line appear in low bright, then judge that whether
the cut-off data appear in Red or Green or Blue color, in this condition between V15 = R-CUTOFF,
V16=G-CUTOFF & V17= B-CUTOFF, fix the data of the color appear in cut-off line and adj the
other two cut-off line so that cut-off line color become white.
(5)Turn the screen VR of FBT so that cut-off line just
disappea
r and use R/C to set
V23
to "0".
Next disable the Y-Mute so that the picture appear in normal mode
2 WHITE BALANCE ADJ
(1)WHITE (HIGH BEAM)
(to be done after screen
First use Minolta Color Analyzer CA100, let the gun point at
Dark White
position
adj)
(as drawing attach), Adj
V04
until
LUMINANCE Y
become
5 cd/m2
, then let the gun
(I2C BUS CONTROL) point at
White
position ( as drawing attach), Adj
V01
until
LUMINANCE Y
(CH 23 50IRE become:
150 cd/m2.
White Dark
WINDOW PATTERN) Adj the
V18(R DRIVE) , V19(B DRIVE)
until the axis of color temperature become
White
10700° X : 0.278 , Y : 0.280
(2) DARK WHITE (LOW BEAM)
Let the gun point at
Dark White
position, if the color temperature data shift away from
the data adjusted in
Item 1 Screen adjustment
, adjust
V15,V16,V17
.
Please fix the
first colour appears in Screen adj item step (4) is fixed
,
adj the other two so that to obtain the similar axis as above
*Note :
Use RF CH23 50IRE window pattern
** Repeat step 1 & 2 to get a regulated position
50% WHITE