Sharp 72GF-66E Vertical Shift, Colour Adjustments, Follow the procedure below to set the Cut Off

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72GF-66E

•When the volume down button is pressed the top and bottom scanning decreases and the centre scanning increases.

•Press the stand-by button on the remote control to store.

Vertical Shift

Adjust the Vertical Shift so that the picture is centred.

The effect of this adjustment is shown in figure 13.

• When the volume up button is pressed, the picture moves up.

 

• When the volume down button is pressed, the picture moves down.

 

• Press the stand-by button on the remote control to store.

Fig.13

 

Colour Adjustments

The following adjustments should only be carried out when the CRT, IC801 or IC801 are replaced.

G2, Cut Off and Gain Adjustments

1.Follow the procedure below to set the G2

1.1Tune the set to the output of a signal generator (cross hatch pattern).

1.2In the user menu, set contrast to 80/100 and brightness to 40/100.

1.3Connect the oscilloscope to the red cathode and adjust G2 to read 135V on the sensor pulse as in the drawing:

135 V

CH1 gnd

NOTE:

Oscilloscope should be adjusted for vertical TV field trigger and synchronized with video signal.

2.Follow the procedure below to set the Cut Off.

2.1Adjust G2.

2.2Tune a white card.

2.3Adjust colour to minimum.

2.4Position colorimeter in the centre of screen.

2.5Adjust brightness and contrast to obtain a lumi- nance of ≈20 NITS.

2.6Operate in Service Mode and select location RED CUT OFF, GREEN CUT OFF and 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.

3.Follow the procedure below to set the GAIN.

3.1Using brightness and contrast buttons, select a luminance of ≈120 NITS.

3.2Operate in Service Mode and select location RED GAIN, GREEN GAIN and 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.

3.3Exit Service Mode and check colour coordinates «X» and «Y» at 20 and 120 NITS. It may be nec- essary to repeat procedure 2 and 3 of Colour Adjustments.

Changing NVM Data

To change the data contained within the Non Volatile Memory, it is necessary to first select the page the data is stored in, then the position and finally to change the data itself. The procedure below outlines this process.

1.While on ALTER NVM PAGE, use the volume up/down buttons to change this data (data is shown in hexadecimal format).

2.Press the channel up button and ALTER NVM POSITION appears, use the volume up/down buttons to change this data (data is shown in hexadecimal format).

3.Press the channel up button and ALTER NVM VALUE appears, use the volume up/down buttons to change this data (data is shown in hexadecimal format).

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Contents Model 72GF-66E Electrical Specifications =0.290 Y=0.300Important Servicing Notes Adjustment menu Geometry AdjustmentsPin Phase Horizontal VerticalHorizontal Shift WidthLower Corner Correction Vertical LinearityVertical Angle Vertical BowColour Adjustments Follow the procedure below to set the Cut OffFollow the procedure below to set the Gain Vertical ShiftContrast Adjustments Dvco Adjustment PALDvco Adjustment Ntsc Auto Installation On/OffQKI KITP7293BMN5 QKITP7293BMN5 F7293BMN5 CRT Module Unit Printed Wiring Board F7269N3. Component side CRT Module Unit Printed Wiring Board F7269N3. Copper side Side Copper Digital Module Unit Printed Wiring Boards F7295NOA C6083Power Switch Unit Printed Wiring Boardsm F7305N0B Copper sideComponent side Audio Amplifier Unit Printed Wiring Boards F7304N0BAudio Amplifier Unit F7304N0B PWB Parts Location Tables CN3 Mother Unit F7293N5A PWB Parts Location TablesFB1 TRC JF6JF8 JF9JF2 JF3R817 214376 58674 R818 207518 61722 T702 56896 173228 CRT Module Unit PWB F7269N3 Parts Location Tables Component Side Copper sideFront A/V Unit PWB F7306N0B Parts Location Tables Dinamic Focus Unit PWB F7271N3 Parts Location TablesDigital Module Unit PWB F7305N0B Parts Location Tables Component Side. Copper sideDigital Module Unit F7295N0B PWB Parts Location Tables RGBJF4 JF5Description of Schematic Diagram 72GF 66E IC305 Sharp Schematic Diagram of CRT Module Unit F7269N3, 00 Version Sharp Front a Realizado Verificado AprobadoSchematic Diagram of Dinamic Focus Unit F7271, 00 Version Realizado Veri Module Digital Schematic Diagram Schematic Diagram of Power Supply Unit F7305, 00 Version Sharp Stereo LED Flashing Codes Block Diagram Video ProcessorBlock Diagram 72GF-66E Parts Description Picture TubeMother Unit Tuner Integrated CircuitsPackaged Circuits CoilsCeramic Filters TransformersUVZ2C2R2MEH1TA Nichicon Ceram C 5PF 50V 2125SMDCeram C 1UF 16V 2125SMD Ceram C DE1410 E332M-KX ResistorsCeram C 220PF 2KV MET Film R 1 OHM 5% 2W MET OX RES 1KOHM 5% 1WSET MET OX R 3,3KOHM 5% 3W LW Wound RES 47KOHM 5% 5WMiscellaneous Parts TRC Unit Integrated Circuits Digital Module Unit Integrated Circuits Zener Diode TZMC24 TFK SMD Zener Diode TZMC3V3 TFK SMDCrystal 5MHZ Acal Crystal 20.25 HMZIC TDA7481 Thomson Audio Amplifier Integrated CircuitsPwbdigital Module VPC RGB Cabinet Parts Frontal A/V Unit CoilsLine Filter Unit Coils 1.2 1.3 1.5 1.6 Recycled Paper
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