Read Sharp 32JF-77 (serv.man5) Service Manual online
11
32JF-77H
G2 Adjustment (Alternative Method)
Follow the procedure below to set the G2:
1. Tune the set to the output of a signal generator (Cross-Hatch pattern).
2. In the user menu, set the picture levels to the FACTORY settings (normalized)
3. Connect a DC voltimeter at the Red cathode (Pin 8 CRT socket) and adjust G2 to read 145V
2. In the user menu, set the picture levels to the FACTORY settings (normalized)
3. Connect a DC voltimeter at the Red cathode (Pin 8 CRT socket) and adjust G2 to read 145V
DC (
±
5V).
Colour Adjustments
The following adjustments should only be carried out when the CRT or IC850, IC851 and IC852 are replaced.
Follow the procedure below to set the Cut Off.
Do not change the Cut RED value (50%).
1. Adjust G2.
2. Tune a white pattern.
3. Adjust colour to minimum.
4. Position colorimeter in the centre of screen.
5. Adjust brightness and contrast to obtain a luminance of »20 NITS.
6.Operate in Service Mode and select location GREEN CUT OFF and BLUE CUT OFF, to obtain colour
coordinates:
2. Tune a white pattern.
3. Adjust colour to minimum.
4. Position colorimeter in the centre of screen.
5. Adjust brightness and contrast to obtain a luminance of »20 NITS.
6.Operate in Service Mode and select location GREEN CUT OFF and BLUE CUT OFF, to obtain colour
coordinates:
X=0.290 ± 0.015 Y=0.284 ± 0.015
To increase press volume-up button and to decrease press volume down button.
BLUE CUT OFF
alter «X» e «Y» coordinates.
GREEN CUT OFF alter «Y» coordinate.
Press the Store button of Remote Control to store all values.
Follow the procedure below to set the Cut Off (Alternative Method).
Do not change the Cut RED value (50%).
1. Adjust G2.
2. Tune a grey scale pattern.
3. Adjust colour to minimum.
4.Operate in Service Mode and select location GREEN CUT OFF and BLUE CUT OFF.
5. Adjust these parameters until achieve a correct grey scale tracking.
2. Tune a grey scale pattern.
3. Adjust colour to minimum.
4.Operate in Service Mode and select location GREEN CUT OFF and BLUE CUT OFF.
5. Adjust these parameters until achieve a correct grey scale tracking.
To increase press volume-up button and to decrease press volume down button.
Press the Store button of Remote Control to store all values.
Press the Store button of Remote Control to store all values.
Follow the procedure below to adjust the customer Colour Limit Control (Hot / Cold).
1. Tune a white pattern.
2. Adjust colour to minimum.
3. Position colorimeter in the centre of screen.
4. Adjust brightness and contrast to obtain a luminance of »20 NITS.
5. Operate in Service Mode and select location “Hot Cut RED”, “Hot Cut GREEN” and “Hot Cut BLUE” by
channel up/down buttons of the Remote Control.
6. Press volume up/down to adjust “Hot Cut RED”, “Hot Cut GREEN” and “Hot Cut BLUE” to obtain the colour
limit coordinates (X/Y) for HOT picture variation.
7. Select location ”Cold Cut RED”, “Cold Cut GREEN” and “Cold Cut BLUE” by channel up/down buttons of the
Remote Control.
8. Press volume up/down to adjust “Cold Cut RED”, “Cold Cut GREEN” and “Cold Cut BLUE” to obtain the
colour limit coordinates (X/Y) for COLD picture variation.
9. Press the Store button of Remote Control to store all adjustments.
10. Turn off the receiver by Main switch to exit the Service Mode.
2. Adjust colour to minimum.
3. Position colorimeter in the centre of screen.
4. Adjust brightness and contrast to obtain a luminance of »20 NITS.
5. Operate in Service Mode and select location “Hot Cut RED”, “Hot Cut GREEN” and “Hot Cut BLUE” by
channel up/down buttons of the Remote Control.
6. Press volume up/down to adjust “Hot Cut RED”, “Hot Cut GREEN” and “Hot Cut BLUE” to obtain the colour
limit coordinates (X/Y) for HOT picture variation.
7. Select location ”Cold Cut RED”, “Cold Cut GREEN” and “Cold Cut BLUE” by channel up/down buttons of the
Remote Control.
8. Press volume up/down to adjust “Cold Cut RED”, “Cold Cut GREEN” and “Cold Cut BLUE” to obtain the
colour limit coordinates (X/Y) for COLD picture variation.
9. Press the Store button of Remote Control to store all adjustments.
10. Turn off the receiver by Main switch to exit the Service Mode.
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