JVC AV-48P777/H Service Manual page 41

Measuring
Item
instrument
WHITE Signal
BALANCE generator
(HIGH LIGHT)
adjustment Remote
control unit
REMOTE CONTROL UNIT
R DRIVE
1 2
R DRIVE
4 5
7 8
TUNE 0
SUB BRIGHT Remote
adjustment control unit
SUB Remote
CONTRAST control unit
adjustment (1)
SUB Signal
CONTRAST generator
adjustment (2)
Oscilloscope
Remote
control unit
Test point Adjustment part
[1.Adjust]
S014: R DRIVE
S015: B DRIVE
[2.White Blance]
B DRIVE
3
B DRIVE
6
9
RETURN+
[1.Adjust]
S001: BRIGHT
[1.Adjust]
S002 : PICTURE
TP-G [1.Adjust]
[G CRT S002 : PICTURE
SOCKET PWB]
TP-E (GND)
Description
• WHITE BALANCE(LOW LIGHT) adjustment should be
finished.
(1) Receive the NTSC black and white signal (color off).
(2) Select STANDARD mode with [VIDEO STATUS]
key.
(3) Set the COLOR TEMP is LOW mode.
(4) Enter TV-Micro Service [1. Adjust].
(5) Set the initial setting value of <S014> (R DRIVE) and
<S015> (B DRIVE).
(6) Enter TV-Micro Service [2. White Balance].
(7) Adjust the screen until it becomes white by using the
[2], [3], [5] and [6] keys.
(8) Press the [MUTING] key to memorize the set value.
(1) Receive any broadcast.
(2) Select STANDARD mode with [VIDEO STATUS] key.
(3) Set the COLOR TEMP is LOW mode.
(4) Enter TV-Micro Service [1. Adjust].
(5) Select <S001> (BRIGHT).
(6) Set the initial setting value.
(7) If the brightness is not the best with the initial setting
value, make fine adjustment until you get the best
brightness.
(8) Press [MUTING] key to memorize the set value.
[ Method of adjustment without measuring instrument ]
(1) Receive any broadcast.
(2) Select STANDARD mode with [VIDEO STATUS]
key.
(3) Set the COLOR TEMP is LOW mode.
(4) Enter TV-Micro Service [1. Adjust].
(5) Select <S002> (PICTURE).
(6) Set the initial setting value.
(7) If the contrast is not the best with the initial setting
value, make fine adjustment of the <S002> until you
get the optimum contrast.
(8) Press [MUTING] key to memorize the set value.
[ Method of adjustment with measuring instrument ]
(1) Receive NTSC gray scale signal.
(2) Select STANDARD mode with [VIDEO STATUS] key.
(3) Select FULL mode with [ASPECT] key.
(4) Set the COLOR TEMP is LOW mode.
(5) Connect the oscilloscope to TP-G.
(6) Enter TV-Micro Service [1. Adjust].
(7) Select <S002> (PICTURE).
(8) Adjust <S002> so that the 0% signal portion and the
100% signal portion of both sides may become 59V.
(9) Press [MUTING] key to memorize the set value.
(No.YA455)1-41