JVC LT-26WX84 Service Manual page 46

4.7.2 VIDEO CIRCUIT
Mesuring
Item
instrument
COMPONENT Remote control
INPUT BLACK unit
LEVEL
Signal generator
Item No. Setting value
F46 090
F47 016
F48 016
Adjust the 0% black to maximum brightness
1-46 (No.YA089)
Test point Adjustment part
[8.PP]
ADM013: (NO DISPLAY)
(G offset)
[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.2
Description
(1) Input 525i signal that shows brightness gradation
with 0% black into a component input terminal.
(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) Press the [MUTING] key to memoirze the set value.
(9) Select "8.PP" from the SERVICE MODE.
(10) Adjust < ADM013 > (G OFFSET) to set the 0% black
part on the upper half of the screen to maximum
brightness. (Fig.2)
(11) Add reference offset value "0" to the < ADM013 > (G
OFFSET) value.
(12) Press the [MUTING] key to memoirze the set value.
(13) Select "1.PICTURE/SOUND" from the SERVICE
MODE.
(14) Check the black level. Adjust the black level again if
it is not proper.
(15) Set < F44 > (Picture control) to "001" to cancel Y
ADJUST MAX MODE.
(16) Press the [MUTING] key to memoirze the set value.
(17) Input 1125i signal.
(18) Repeat steps (5) to (15) above.
(19) Press the [MUTING] key to memoirze the set value.