JVC AV-56P776 Service Manual page 48

Measuring
Item
instrument
WHITE Signal
BALANCE generator
(LOW LIGHT)
adjustment Remote
control unit
BRIGHT LEVEL
DRIVE
CUTOFF
REMOTE CONTROL UNIT
1
4
7
TUNE
1.PICTURE/SOUND
Item No. Item name
S03 BRIGHT
S10 DRIVE R
S12 DRIVE B
S14 CUTOF R
S16 CUTOF G
S18 CUTOF B
WHITE Signal
BALANCE generator
(HIGH LIGHT)
adjustment Remote
control unit
Signal
Item
NTSC
S10 064
S12 080
REMOTE CONTROL UNIT
1
4
7
TUNE
Test point Adjustment part
[3.WHITE BALANCE]
BR
CUT R
CUT B
3. WHITE BALANCE
BR
DRV R B
CUT R G B
Setting value
2 3
5 6
8 9
RETURN+
0
TV
3.WHITE BALANCE
Initial setting Initial setting
Item name
value
127 BR
085 DRV R
085 DRV B
185 CUT R
185 CUT G
185 CUT B
[1.PICTURE/SOUND]
S10: DRIVE R
S12: DRIVE B
[3.WHITE BALANCE]
DRV R
DRV B
Initial setting value
480i
064
080
2 3
DRIVE B
5 6
DRIVE R
8 9
RETURN+
0
TV
NOTE :
Before starting the adjustment, warm up the unit for
more than 30 minutes.
(1) Receive NTSC gray scale signal (include 0% black).
(2) Select STANDARD mode with [VIDEO STATUS]
key.
(3) Set the COLOR TEMP is LOW mode.
(4) Select 3.WHITE BALANCE from SERVICE MENU.
(5) Select < BR >, < DRV R >, < DRV B >, < CUT R >,
< CUT G > and < CUT B >.
(6) Set the initial setting value.
(7) Adjust < BR > so that the LOW-LIGHT should be
visible.
(8) Adjust using [ 8 ] / [ 0 ] keys and [ 9 ] / [ TV ] keys so
that a 0%black portion may become black.
(9) Press [MUTING] key to memorize the set values.
(10) Input 480i component signal (include 0% black) from
COMPONENT VIDEO terminal.
(11) Repeat steps 5 to 9 above.
(12) Input 1080i component signal (include 0% black)
from COMPONENT VIDEO terminal.
(13) Repeat steps 5 to 9 above.
NOTE :
• 3. WHITE BALANCE < BR >, < DRV R >, < DRV B >,
< CUT R >, < CUT G > and < CUT B > are equal to 1.
PICTURE/SOUND < S03 >, < S10 >, < S12 >, < S14 >,
< S16 > and < S18 >.
• 3. WHITE BALANCE < BR >, < DRV R > and < DRV
B > are same value as 1. PICTURE/SOUND < S03 >,
< S10 > and < S12 >.
value
• 3. WHITE BALANCE < CUT R >, < CUT G > and < CUT
127
B > are same value as 1. PICTURE/SOUND < S14 >,
085
< S16 > and < S18 > plus 30.
085
• For example, 3.WHITE BALANCE < BR > value was
215
changed from 127 to 120, 1.PICTURE/SOUND < S03
215 > value was changed from 127 to 120 automatically.
215 3. WHITE BALANCE < CUT R > value was changed
from 215 to 210, 1.PICTURE/SOUND < S03 > value
was changed from 185 to 180 automatically.
(1) Receive NTSC gray scale signal (include 75%
white).
(2) Select STANDARD mode with [VIDEO STATUS]
key.
(3) Set the COLOR TEMP is LOW mode.
(4) Select 1.PICTER/SOUND from SERVICE MENU.
(5) Select < S10 > (DRIVE R) and < S12 > (DRIVE B).
(6) Set the initial setting value.
(7) Select 3.WHITE BALANCE from SERVICE MENU.
(8) Adjust using [ 2 ] / [ 5 ] keys and [ 3 ] / [ 6 ] keys so
1080i
that the natural white should be visible on 75% white.
(9) Press [MUTING] key to memorize the set values.
064
(10) Input 480i component gray scale signal (include
080
75% white) from COMPONENT VIDEO terminal.
(11) Repeat steps 4 to 9 above.
(12) Input 1080i component grayscale signal (include
75% white) from COMPONENT VIDEO terminal.
(13) Repeat steps 4 to 9 above.
Description
(No.YA318)1-47