Sharp LC-13E1U Service Manual page 15

Adjustments
Adjustment
1 B+ Adjustment
(R3760)
2 Inch Size setup
2
(If E PROM is replaced)
(IC2004)
3 Common-bias
adjustment
4 TAMP adjustment
Adjusting conditions
1. Connect the DC voltmeter to pin (2) of
P3702.
1. Go to the adjustment mode.
1. Receive a B/W channel.
2. Go to the adjustment mode.
3. Select the "COM BIAS" with [MENU]
key.
1. In the TV mode, the unit receives a
picture of the half color bar signal
whose left top corner is 75% white.
The signal does not have to be the
half color bar as long as the 180th
line from the top and 46th pixel from
the left is 75% white. (Data at this
point is used for adjustment.)
2. Adjust "NTSC TAMP" on the page 2
of the adjustment process mode so
that the "Y" value on the same page
falls between BF - C9.
3. Set the values of PAL-M TAMP and
PAL-N TAMP same.
15
Adjusting method
1. Adjust the "B+ Adj" value to
5.0 ± 0.02V with R3760.
* Keep the voltage at pin (2) of P3702
below 5.3V during the adjustment.
1. Select "INCH SIZE" and adjust to
"13" (LC-13E1U), "15" (LC-15E1U)
with [VOL +] or [VOL –] key.
* The color of "INCH SIZE" must be
yellow.
1. Adjust "COM BIAS" to the darkest
screen with [VOL +] and [VOL –] key.
* The color of "COM BIAS" must be
yellow.
Upper left 75%
Vertical: 180th line
Horizontal: 46th pixel
640 pixels
Page 2 of the adjustment process mode
2
| C O M
B I A S
N T S C T A M P
P A L - M T A M P
P A L - N T A M P
R C U T O F F
G C U T O F F
B C U T O F F
G3 B3 R3 00 00
G1 B4 Y DF DE
T A M P H
T A M P L
GAIBU VER 0.000
LC-13E1U/UB/UW
LC-15E1U/UB/UW
480 lines
140
27
27
27
0
0
0
00
B5
C9
BF
Y-Data
(White 100%)