JVC LT-26WX84 Service Manual page 50

Mesuring
Item
instrument
SUB-SCREEN Remote control
A-D unit
CONVERTER
GAIN Signal generator
Item No. Setting value
F46 090
F47 168
F48 168
Adjust so that 75%" white is the brightest.
Adjust so that 75%" white is the brightest.
1-50 (No.YA003)
Test point Adjustment part
[8. PP]
ADM010: (NO DISPLAY)
(G GAIN)
[1. PICTURE/SOUND]
S13: RDRV (R DRIVE)
S15: GDRV (G DRIVE)
S17: BDRV (B DRIVE)
S19: CUTR (R CUTOFF)
S21: CUTG (G CUTOFF)
S23: CUTB (B CUTOFF)
F44: (NO DISPLAY)
(Picture control)
F45: (NO DISPLAY)
(Picture control mode sw)
F46: OUT LV.
(Output level upon
detection)
F47: LMT BTM
(Minimum value upon
detection)
F48: LMT TOP
(Maximum value upon
detection)
Adjustment item
Output level upon detection
Minimum value upon detection
Maximum value upon detection
SPLIT screen mode
Fig.8
Description
(1) Input NTSC signal that shows brightness gradation
with 75% white into both the right and the left
screen.
(2) Set "VIDEO STATUS" to STANDARD.
(3) Set "ASPECT" to FULL.
(4) Select "COLOR TEMPERATURE" to "LOW".
(5) Set SPLIT screen mode.
(6) Select "1.PICTURE/SOUND" from the SERVICE
MODE for the right screen.
(7) Set < F44 > (Picture control) to "001" and <F45 >
(Picture control mode sw) to "000" to set Y ADJUST
MAX mode.
(8) Set < F46 > (Output level upon detection), < F47 >
(Minimum value upon detection), and < F48 >
(Maximum value upon detection) to values as
shown in the left table.
(9) Press the [MUTING] key to memoirze the set value.
(10) Select "8.PP" from the SERVICE MODE.
(11) Adjust < ADM010 > (G OFFSET) so that the 75%
white part on the upper right part of the screen is
white. (Fig.8)
(12) Press the [MUTING] key to memoirze the set value.
(13) Check the black level adjusted in "SPLIT screen
BLACK LEVEL adjustment". Adjust the black level
of SUB SCREEN again if it is not proper.
(14) Select "1.PICTURE/SOUND" from the SERVICE
MODE.
(15) Set < F44 > (Picture control) to "000" to cancel Y
ADJUST MAX MODE.
(16) Press the [MUTING] key to memoirze the set value.