JVC PD-42WV74 Service Manual page 48

Mesuring
Item
instrument
A-D Remote control
CONVERTER unit
GAIN
Signal generator
Item No. Setting value
F46 090
F47 220
220
F48
Reduce black noise at this portion to the minimum
1-48 (No.YA029)
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
Fig.3
Description
(1) Input NTSC all-white signal.
(2) Set "VIDEO STATUS" to STANDARD.
(3) Set "ASPECT" to FULL.
(4) Select "COLOR TEMPERATURE" and set to
"LOW".
(5) Select "1.PICTURE/SOUND" from the SERVICE
MODE.
(6) Set < S13 > (R DRIVE), < S15 > (G DRIVE) and
< S17 > (B DRIVE) to "255".
(7) Set < S19 > (R CUTOFF), < S21 > (G CUTOFF) and
< S23 > (B CUTOFF) to "128".
(8) Set < F44 > (Picture control) to "001" and < F45 >
(Picture control mode sw) to "000" to Set Y ADJUST
MAX MODE.
(9) 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.
(10) Press the [MUTING] key to memorize the set
values.
(11) Select "8.PP" from the SERVICE MODE.
(12) Adjust < ADM010 > (G GAIN) to set the window
screen on the upper half of the screen to maximum
brightness. (Fig.3)
(13) Press the [MUTING] key to memorize the set
values.
(14) Check the black level. Perform the "BLACK LEVEL
Adjustment" again if the adjusted value is out of
alignment.
(15) Select "1.PICTURE/SOUND" from the SERVICE
MODE.
(16) Set < F44 > (Picture control) to "000" to set Y
ADJUST MAX MODE.
(17) Press the [MUTING] key to memorize the set
values.