Sharp LC-28HM2E (serv.man2) Service Manual ▷ View online
29
LC-28HM2
AN-28SP2
(3) PAL signal adjustment (Adjustment item appearing on the 1st line of page 1 is described as P1L1.)
Adjusting point
Adjusting conditions
Adjusting procedure
1
Color system setting
1. Feed the PAL video signal.
1. If “PAL” is not found in the last part of the 1st line,
press [ 5 ] key of the remote controller to switch to
“PAL”.
“PAL”.
2
PAL BRIGHT
adjustment
adjustment
1. Feed the color bar signal
carrying PAL composite
100% white and 0% white
(pedestal black).
100% white and 0% white
(pedestal black).
(Example)
1. Adjust (P3L1) C PAL BRIGHT, so that the pedestal
black portion has the largest green area. If there is
no change against lowering the value, it is likely that
the adjustment point (“a” in the figure below) is
deviated from the correct point. In this case, once try
to increase the adjustment value.
no change against lowering the value, it is likely that
the adjustment point (“a” in the figure below) is
deviated from the correct point. In this case, once try
to increase the adjustment value.
The portion
referred to here
(Outside of the
right frame)
referred to here
(Outside of the
right frame)
Green level
Adjustment value
Adjust to this point
a
3
PAL CONTRAST
adjustment
adjustment
1. Feed the color bar signal
carrying PAL composite
100% white and 0% white
(pedestal black).
100% white and 0% white
(pedestal black).
1. Adjust (P3L2) C PAL CONTRAST, so that the 100%
white portion has the largest green area.
If N358 adjustment item
No. 3 “BRIGHT adjustment
value copy” has already
been done, this item can
be omitted.
No. 3 “BRIGHT adjustment
value copy” has already
been done, this item can
be omitted.
The portion referred to here
4
PAL R DRIVE
adjustment
adjustment
1. Feed the color bar signal
carrying PAL composite
100% white and 0% white
(pedestal black).
100% white and 0% white
(pedestal black).
1. Adjust (P3L3) C PAL R DRIVE, so that the 100%
white portion has the largest red area.
The portion referred to here
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LC-28HM2
AN-28SP2
Adjusting point
Adjusting conditions
Adjusting procedure
5
PAL B DRIVE
adjustment
adjustment
1. Feed the color bar signal
carrying PAL composite
100% white and 0% white
(pedestal black).
100% white and 0% white
(pedestal black).
1. Adjust (P3L4) C PAL B DRIVE, so that the 100%
white portion has the largest blue area.
6
PAL COLOR
adjustment
adjustment
1. Feed the color bar signal
carrying PAL composite
100% white and 0% white
(pedestal black).
100% white and 0% white
(pedestal black).
1. Adjust (P3L5) C PAL COLOR, so that the 100% blue
portion has the largest blue area.
The portion referred to here
The portion
referred to here
referred to here
(4) SECAM signal adjustment (Adjustment item appearing on the 1st line of page 1 is described as P1L1.)
Adjusting point
Adjusting conditions
Adjusting procedure
1
Color system setting
1. Feed the SECAM video
signal.
1. If “SECAM” is not found in the last part of the 1st line,
press [ 6 ] button of the remote controller to switch to
“SECAM”.
“SECAM”.
2
BELL F0 adjustment
1. Hook up the oscilloscope at
TP2851.
2. Feed the monochrome
gradation signal.
* It is also acceptable to use
black and white portion at
the bottom of the color bar
signal. (Refer to the signal
exemplified in the item 4
below.) Same adjustment
can be done as described
in the right.
the bottom of the color bar
signal. (Refer to the signal
exemplified in the item 4
below.) Same adjustment
can be done as described
in the right.
1. Adjust (P4L1) BELL F0, so that the level “a” is
minimized.
Input signal
a
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LC-28HM2
AN-28SP2
Adjusting point
Adjusting conditions
Adjusting procedure
3
SECAM BRIGHT
adjustment
adjustment
1. Feed the color bar signal
carrying SECAM composite
100% white and 0% white
(pedestal black).
100% white and 0% white
(pedestal black).
(Example)
1. Adjust (P4L2) C SECAM BRIGHT, so that the
pedestal black portion has the largest green area. If
there is no change against lowering the value, it is
likely that the adjustment point (“a” in the figure below)
is deviated from the correct point. In this case, once
try to increase the adjustment value.
there is no change against lowering the value, it is
likely that the adjustment point (“a” in the figure below)
is deviated from the correct point. In this case, once
try to increase the adjustment value.
4
SECAM CONTRAST
adjustment
adjustment
1. Feed the color bar signal
carrying SECAM composite
100% white and 0% white
(pedestal black).
100% white and 0% white
(pedestal black).
1. Adjust (P4L3) C SECAM CONTRAST, so that the
100% white portion has the largest green area.
5
SECAM R DRIVE
adjustment
(C SECAM R DRIVE)
adjustment
(C SECAM R DRIVE)
1. Feed the color bar signal
carrying SECAM composite
100% white and 0% white
(pedestal black).
100% white and 0% white
(pedestal black).
1. Adjust (P4L4) C SECAM R DRIVE, so that the 100%
white portion has the largest red area.
If N358 adjustment item
No. 3 “BRIGHT adjustment
value copy” has already
been done, this item can
be omitted.
No. 3 “BRIGHT adjustment
value copy” has already
been done, this item can
be omitted.
The portion
referred to here
referred to here
Green level
Adjustment value
Adjust to this point
a
The portion referred to here
The portion referred to here
32
LC-28HM2
AN-28SP2
Adjusting point
Adjusting conditions
Adjusting procedure
6
SECAM B DRIVE
adjustment
(C SECAM B DRIVE)
adjustment
(C SECAM B DRIVE)
1. Feed the color bar signal
carrying SECAM composite
100% white and 0% white
(pedestal black).
100% white and 0% white
(pedestal black).
1. Adjust (P4L5) C SECAM B DRIVE, so that the 100%
white portion has the largest blue area.
7
SECAM COLOR
adjustment
adjustment
1. Feed the color bar signal
carrying SECAM composite
100% white and 0% white
(pedestal black).
100% white and 0% white
(pedestal black).
1. Adjust (P4L6) C SECAM COLOR, so that the 100%
blue portion has the largest blue area.
(5) COMPONENT signal adjustment (Adjustment item appearing on the 1st line of page 1 is described as P1L1.)
Adjusting point
Adjusting conditions
Adjusting procedure
The portion referred to here
The portion
referred to here
referred to here
1
Input signal setting
1. Set the input switch to
COMP15/60 and feed the
video signal.
video signal.
1. If “COMPONENT1 15k 60Hz” is not found in the last
part of the 1st line, press [ 7 ] button of the remote
controller to switch to “COMPONENT1 15k 60Hz”.
controller to switch to “COMPONENT1 15k 60Hz”.
2
COMPONENT
BRIGHT adjustment
BRIGHT adjustment
1. Feed the color bar signal
carrying COMPONENT
100% white and 0% white
(pedestal black).
100% white and 0% white
(pedestal black).
(Example)
1. Adjust (P5L1) COMP 15/60 BRIGHT, so that the
pedestal black portion has the largest green area. If
there is no change against lowering the value, it is
likely that the adjustment point (“a” in the figure below)
is deviated from the correct point. In this case, once
try to increase the adjustment value.
there is no change against lowering the value, it is
likely that the adjustment point (“a” in the figure below)
is deviated from the correct point. In this case, once
try to increase the adjustment value.
The portion
referred to here
referred to here
Green level
Adjustment value
Adjust to this point
a
If N358 adjustment item
No. 3 “BRIGHT adjustment
value copy” has already
been done, this item can
be omitted.
No. 3 “BRIGHT adjustment
value copy” has already
been done, this item can
be omitted.
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