LC-28HM2E (serv.man2). text - Sharp TV Service Manual (repair manual). Page 27

Adjusting point

Adjusting conditions

Adjusting procedure

1

AVC system +B
adjustment
(P2L1:
+BADJ CENTER)

1. Connect DC voltmeter to

L806 on the side as shown
in the figure.

1. Adjust DC/DC 5V line output voltage to 5.0 ±0.05V.

2

Model selection
(P1L3:
MODEL SELECT)

1. In the case of LC28HM2E, confirm that the setting is

“HM2E”.

Connect voltmeter
here.

L806

Adjusting point

Adjusting conditions

Adjusting procedure

1

Color system setting

1. Feed the NTSC video

signal.

1. If “N358” is not found in the last part of the 1st line,

press [ 4 ] button of the remote controller to switch to
“N358”.

2

NTSC BRIGHT
adjustment

1. Feed the color bar signal

carrying NTSC composite
100% white and 0% white
(pedestal black).

(Example)

1. Adjust (P2L4) C N358 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.

2.  After above adjustment is finished, deduct 16 from

the present adjustment value for final setting. (Press
“Left” button of the remote controller once to reduce
16 from the value.)

The portion 
referred to here

Green level

Adjustment value

Adjust to this point

a

3

BRIGHT adjustment
value copy

1. Operate the adjustment button in the line (P2L5) BR

SET FROM N358. It works all right if “ON” appears
first and then “OFF” appears.