Sharp 72FF-57E, Service Manual

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72FF-57E
81FF-57E
13− 13− 13− 13− 13−
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. 1
3
).
Fig. 13
COLOUR ADJUSTMENT
The following adjustments are only required when
Picture Tube, IC 850, IC 851, IC 852 or IC 6102 are
changed:
1. RED CUT OFF / GREEN CUT OFF / BLUE CUT OFF
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.
1.6 Operate in Service Mode and select location RED
CUT 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.
RED CUT OFF alter «X» coordinate.
GREEN CUT OFF alter «Y» coordinate.
BLUE CUT OFF alter «X» and «Y» coordinate.
2. RED GAIN / GREEN GAIN / BLUE BAIN
2.1 Using brightness and contrast buttons, select a
luminance of
≈120
NITS.
2.2 Operate in Service Mode and select location RED
GAIN / 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.
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.
ACCESS TO NVM
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.
!
CAUTION: Do not change NVM VALUE to avoid
risk of serious damages to TV set.
AUTO INSTALLATION OFF/ON
When ON is selected, the TV will perform the
autoinstallation sequence as soon as service mode is
removed.
DVCO ADJUSTMENT (NTSC)
a) Receive Philips pattern signal.
b) When Stand-by button is pressed (Remote Control Unit),
start automatically the adjustment.
a) Receive Philips pattern signal.
b) When Stand-by button is pressed (Remote Control Unit),
start automatically the adjustment.
DVCO ADJUSTMENT (PAL)
a) Receive Philips pattern signal.
b) When volume-up button is pressed, luma phase
delays.
c) When volume-down button is pressed, chroma phase
delays.
d) Adjust the Chroma-Luma delay.
LUMA CHROMA DELAY
a) Receive Monoscope pattern signal.
b) Connect DC voltmeter between TP601 and TP602
(R 620).
c) Adjust with channel-up / channel-down to 1,70V ±
0.03V.
BCL THRESHOLD
OPC VALUE
Shows reading of detected illuminated value by O.P.C.
(Optical Picture Control) to check function.
Fig. 14 Fig. 15
PICTURE ROTATION OFFSET
a) Receive Philips pattern signal.
b) When volume-up button is pressed, picture turn to the
left (fig. 14).
c) When volume-down button is pressed, picture turn to
the right (fig. 15).
d) Adjust the horizontal location to obtain picture levelling.