JVC LT-32WX84, Service Manual, Page: 41 / 130

(No.YA004)1-41
4.7.2 VIDEO CIRCUIT
Item
Measuring
instrument
Test point Adjustment part Description
COMPONENT
INPUT BLACK
LEVEL Remote control
unit
Signal generator
[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)
(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 (16) above.
Fig.2
Item No. Setting value Adjustment item
F46 090 Output level upon detection
F47 016 Minimum value upon detection
F48 016 Maximum value upon detection
Adjust the 0% black to maximum brightness