Sharp 29WF200, Service Manual

Page: 12 / 68

12
29WF200
29WF500
12-1
12-2
HORIZONT
AL
AND VERTICAL
DEFLECTION LOOP
ADJUSTMENT
No.
Adjusting point
Adjusting condition/procedure
W
aveform or others
V
-AMP
50
Adjust the overscan to 8.5%.(monoscope)
V
-LINE 50
Adjust the linearity to the best.(monoscope)
V S-CORR 50
Already preset. (Adjust this unless the linearity is achieved.) (monoscope)
V
-CENT 50
Align the center of the screen to the geometric center of CR
T
.(monoscope)
H-CENT 50
Align the center of the screen to the geometric center of CR
T
.(monoscope)
H-SIZE 50
Adjust the overscan to 8.5%.(monoscope)
E/W
-P
AR 50
Adjust the 2nd vertical line from the right end of the crosshatch pattern so that the midddle 4 blocks are straight. (Refer to Fig.7-1)(crosshatch)
E/W
-COR 50
Adjust the 2nd vertical line from the right end of the crosshatch pattern so that the top are straight. (Refer to Fig.7-2)(crosshatch)
TRAPE 50
Adjust the 2nd vertical line from the right end of the crosshatch pattern so that the D1 (center area of the second vertical line-edge of screen) and D2 (top area of the second vertical line-edge of screen) are same.(Refer to Fig.7-3)
V
-EHT
Already preset.
H-EHT
Already preset.
OTHER
On the items of V
-AMP
60, V
-LINE 60, V S-CORR
60, V
-CENT
60, H-CENT
60, H-SIZE 60, E/W
-P
AR
60, E/W
-COR 60 and
TRAPE 60, the data is
automatically input if the 50Hz mode adjusutment is done. however
, if it is largely devisted when it is check in
the 60Hz. Mode Readjust in the 60Hz. Mode. Attention: Don't change 50Hz mode data after adjust 60Hz mode data.Because 60Hz mode data follow the 50Hz mode data automatically
.
1
MAIN SCREEN ADJUSTMENT
D2 D1
Fig. 7-1 Fig. 7-2 Fig. 7-3
P
A
L
CHROMA
ADJUSTMENT
No.
Adjusting point
Adjusting condition/procedure
W
aveform or others
SUB COLOUR (I
2
C BUS
CONTROL)
1.
Receive "P
AL
Colour Bar" signal.
2.
Make the image normal with the remote control- ler
.
3.
Connect the oscilloscope to IC850#9pin. (Using 10:1 Probe)
Range :
2
V/Div
Sweep T
ime
:
20
µ
sec/Div
4
.
Set the sub-colour adjustment mode with the remote controller
, and vary the sub colour data to
make 75% W of the colour bar and RED at the same level for adjustment shown in Fig.8-1.
1
Fig. 8-1
75% W
YM
g
R
B
G
Cy
100% W
A B C
W
Y
Cy
G
M
g
R
B
(B-Y)
A=B=C
A
B
W
Y
Cy
G
M
g
R
B
(B-Y)
A=B
RF input
Optional
A
V
input
No.
Adjusting point
Adjusting condition/procedure
W
aveform or others
SUB-TINT (I
2
C BUS
CONTROL)
1
.
Select the sub-tint adjustment mode (automatic Y
cut) to receive the "NTSC Colour Bar" (A
V input).
2.
Connect the oscilloscope to
TP47B
»
Range
: 20mV/Div
. (AC)(Use Probe 10:1)
»
Sweep time
: 20
µ
sec/Div
.
3
.
V
ary the sub tint data to adjust the waveform to
be gained as shown in Fig.9-1. TP47B......(KY) 6pin
NOTE:
(Optional) If using RF input, please refer to the Fig. 9-2 waveform.
1
Fig. 9-1
NTSC CHROMA
ADJUSTMENT
Fig. 9-2