JVC LT-26WX84 Service Manual page 50

Mesuring
Item
instrument
COMPOSITE Remote control
INPUT A-D unit
CONVERTER
OFFSET Signal generator
Item No. Setting value
090
F46
165
F47
F48 165
Adjust so that 75%" white is the brightest.
Adjust so that 75%" white is the brightest.
1-50 (No.YA089)
Test point Adjustment part
[2. YC SEP]
YCM132: (NO DISPLAY)
(CONTRAST)
[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
Fig.6
Description
(1) Input a signal that shows brightness gradation with
75% white.
(2) Set "VIDEO STATUS" to STANDARD.
(3) Set "ASPECT" to FULL.
(4) Select "COLOR TEMPERATURE" to "LOW".
(5) Select "1.PICTURE/SOUND" from the SERVICE
MODE.
(6) Set < F44 > (Picture control) to "001" and <F45 >
(Picture control mode sw) to "000" to set Y ADJUST
MAX MODE.
(7) 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.
(8) Select "2.YC SEP" from the SERVICE MODE.
(9) Adjust < YCM132 > (CONTRAST) so that the 75%
white of gradation is white. (Fig.7)
(10) Press the [MUTING] key to memoirze the set value.
(11) Check the black level adjusted in composite input
black level adjustment. Perform the "Composite
input black level Adjustment" again if the adjusted
value is not proper.
(12) Perform (9) and (10) if you readjust the black level
in (11).
(13) Select "1.PICTURE/SOUND" from the SERVICE
MODE.
(14) Set < F44 > (Picture control) to "000" to cancel Y
ADJUST MAX MODE.
(15) Press the [MUTING] key to memoirze the set value.