Read Sharp 76GF-64H (serv.man3) Service Manual online
6
76GF-64H
Fig. 11
9−
9−
9−
9−
9− S-CORRECTION
a) Internal pattern signal will be displayed.
b) When volume-up button is pressed, upper and lower scanning decreases, and
center scanning increases.
c) When volume-down button is pressed, upper and lower scanning increases,
and center scanning decreases.
d) Adjust the S-CORRECTION to obtain a balance between upper, lower and
center (fig. 10).
b) When volume-up button is pressed, upper and lower scanning decreases, and
center scanning increases.
c) When volume-down button is pressed, upper and lower scanning increases,
and center scanning decreases.
d) Adjust the S-CORRECTION to obtain a balance between upper, lower and
center (fig. 10).
10−
10−
10−
10−
10− VERTICAL SHIFT
a) Internal pattern signal will be displayed.
b) When volume-up button is pressed, picture moves up.
c) When volume-down button is pressed, picture moves down.
d) Adjust the horizontal location to obtain picture centering (fig. 11).
b) When volume-up button is pressed, picture moves up.
c) When volume-down button is pressed, picture moves down.
d) Adjust the horizontal location to obtain picture centering (fig. 11).
COLOUR ADJUSTMENT
The following adjustments are only required when Picture Tube,
IC801 or IC1801 are changed:
IC801 or IC1801 are changed:
1. RED CUT OFF / GREEN CUT OFF / BLUE CUT OFF
2. RED GAIN / GREEN GAIN / BLUE BAIN
ACCESS TO NVM
a) Receive Philips pattern signal.
b) When Stand-by button is pressed (Remote Control
Unit), start
b) When Stand-by button is pressed (Remote Control
Unit), start
DVCO ADJUSTMENT (PAL)
Up/Down volume buttons are used to adjust the
contrast of the following items:
contrast of the following items:
-TELETEXT MIX MODE CONTRAST.
-TELETEXT CONTRAST.
-OSD CONTRAST.
-TELETEXT CONTRAST.
-OSD CONTRAST.
CONTRAST ADJUSTMENT
DVCO ADJUSTMENT (NTSC)
Adjust not required.
AUTO INSTALLATION OFF/ON
When ON is selected, the TV will perform the
autoinstallation sequence as soon as service mode is
removed.
autoinstallation sequence as soon as service mode is
removed.
a) Connect Test Pattern signal to antenna terminal.
b) Press main switch to OFF.
c) Press volume-down and channel-up buttons and
main switch to ON simultaneously.
d)»Service Software Vxx.xx» appears o screen.
e)Press main switch to OFF.
b) Press main switch to OFF.
c) Press volume-down and channel-up buttons and
main switch to ON simultaneously.
d)»Service Software Vxx.xx» appears o screen.
e)Press main switch to OFF.
PROTECTIONS CANCEL
AGC ADJUSTMENT
a) Tune the TV into CH10 (pattern generator).
b) Adjust the signal strength to 57dB
b) Adjust the signal strength to 57dB
µ
V
c) Press the stand-by button on the Remote Control
(red button).
The TV will perform automatically the AGC.
(red button).
The TV will perform automatically the AGC.
AFT ADJUSTMENT PAL
a) Tune the TV into CH69 (pattern generator).
b) Press the stand-by button on the Remote Control
(red button).
The TV will perform automatically the AFT.
b) Press the stand-by button on the Remote Control
(red button).
The TV will perform automatically the AFT.
1.1 Adjust G2.
1.2 Tune a white card.
1.3 Adjust colour to minimum.
1.4 Position colourimeter in the center of screen.
1.5 Adjust brightness and contrast to obtain a luminance of
≈20 NITS.
1.2 Tune a white card.
1.3 Adjust colour to minimum.
1.4 Position colourimeter in the center of screen.
1.5 Adjust brightness and contrast to obtain a luminance of
≈20 NITS.
1.6 Operate in Service Mode and select location RED CUT
OFF / GREEN CUT OFF / BLUE CUT OFF, to obtain colour
coordinates:
OFF / GREEN CUT OFF / BLUE CUT OFF, to obtain colour
coordinates:
X=0.290 ± 0.015 Y=0.300 ± 0.015
To increase press volume-up button and to decrease press
volume down button.
volume down button.
RED CUT OFF
alter «X» coordinate.
GREEN CUT OFF
alter «Y» coordinate.
BLUE CUT OFF
alter «X» and «Y» coordinate.
2.1 Using brightness and contrast buttons, select a
luminance of
luminance of
≈120 NITS.
2.2 Operate in Service Mode and select location RED GAIN
/ GREEN GAIN / BLUE GAIN, to obtain colour coordinates:
/ GREEN GAIN / BLUE GAIN, to obtain colour coordinates:
X=0.290 ± 0.015 Y=0.300 ± 0.015
To increase press volume-up button and to decrease press
volume down button.
volume down button.
RED CUT OFF
alter «X» coordinate.
GREEN CUT OFF
alter «Y» coordinate.
BLUE CUT OFF
alter «X» and «Y» coordinate.
2.3 Exit Service Mode and check colour coordinates «X»
and «Y» at 20 and 120 NITS. It may be necessary to repeat
procedure 1 and 2 of COLOUR ADJUSTMENT.
and «Y» at 20 and 120 NITS. It may be necessary to repeat
procedure 1 and 2 of COLOUR ADJUSTMENT.
Fig. 10
Press CH
∧ to move in the following sequence:
ALTER NVM PAG
⇒
ALTER NVM POS
⇒
ALTER VNM
VAL to alter presseting adjustments, press up/down-
volume buttons on ALTER NVM VAL.
volume buttons on ALTER NVM VAL.
!
CAUTION: Do not change NVM VALUE to avoid
risk of serious damages to TV set.
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