Sharp 72GF-66E service manual Adjustment menu, Geometry Adjustments

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72GF-66E

ADJUSTMENT PROCEDURES

All adjustments to this chassis, except for focus, are carried out in the service mode.

•SERVICE MODE

The service mode is provided to enable the engineer to correctly set up the receiver to the CRT fitted in the set. Note that these adjustments may vary from one receiver to another.

To enter the service mode, carry out the following procedure.

1.Connect a test pattern to the antenna terminal.

2.Tune the receiver to this signal.

3.Turn the receiver off using the mains switch.

4.Press volume down and channel up buttons on the front of the receiver at the same time.

5.Keeping these buttons pressed, turn the mains on.

6.When the set starts up it will be in service mode.

7.Release the two buttons.

•Use the channel up and down buttons to move between the options.

•Use the volume control buttons to change the data.

•To store the data, use the stand-by button on the remote control.

•To exit the service mode, turn the receiver off using the mains switch.

When the service mode is entered the following On Screen Display appears

-SERVICE SOFTWARE AND HEXADECIMAL COUNTER DISPLAY: SW ON XXXX SW OFF XXXX HOURS ON XXXX

CH

4

5

The figures displayed in the XXXX locations are hexadecimal representations of the number of times that particular function has been executed. For example if the hexadecimal number displayed after SW ON was 0E4A, this would correspond to the receiver being turned on 3658 times.

Adjustment menu:

The following adjustments can be carried out in the service mode.

• Horizontal Shift

• Green Cut Off

• East West Width

• Blue Cut Off

• Pin Phase

• Alter NVM Page

• Pin Amp

• Alter NVM Position

• Upper corner correction

• Alter NVM Value

• Lower corner correction

• Teletext Mix Mode Contrast

• Vertical Linearity

• Teletext Contrast

• Vertical angle

• OSD Contrast

• Vertical bow

• DVCO Adjustment (Only PAL)

• Vertical Amplitude

• DVCO Adjustment (Only NTSC)

• S Correction

• Luma croma delay

• Vertical Shift

• AGC Adjustment

• Red Gain

• AFT Adjustment (BG-I-L)

• Green Gain

• AFT Adjustment (L’)

• Blue Gain

• OPC Value

• Red Cut Off

• Auto Installation On/Off

Geometry Adjustments

All geometry adjustments are based on an internally generated test pattern as shown in figure 1. When carrying out any of the above geometry adjustments, use the inter-

nally generated test pattern for guidance. Fig.1

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Contents Model 72GF-66E =0.290 Y=0.300 Electrical SpecificationsImportant Servicing Notes Geometry Adjustments Adjustment menuHorizontal Vertical Pin PhaseHorizontal Shift WidthVertical Linearity Lower Corner CorrectionVertical Angle Vertical BowFollow the procedure below to set the Cut Off Colour AdjustmentsFollow the procedure below to set the Gain Vertical ShiftDvco Adjustment PAL Contrast AdjustmentsDvco 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 C6083 Digital Module Unit Printed Wiring Boards F7295NOACopper side Power Switch Unit Printed Wiring Boardsm F7305N0BComponent side Audio Amplifier Unit Printed Wiring Boards F7304N0BAudio Amplifier Unit F7304N0B PWB Parts Location Tables CN3 Mother Unit F7293N5A PWB Parts Location TablesFB1 JF6 TRCJF8 JF9JF3 JF2R817 214376 58674 R818 207518 61722 T702 56896 173228 Component Side Copper side CRT Module Unit PWB F7269N3 Parts Location TablesDinamic Focus Unit PWB F7271N3 Parts Location Tables Front A/V Unit PWB F7306N0B Parts Location TablesDigital Module Unit PWB F7305N0B Parts Location Tables Component Side. Copper sideRGB Digital Module Unit F7295N0B PWB Parts Location TablesJF4 JF5Description of Schematic Diagram 72GF 66E IC305 Sharp Schematic Diagram of CRT Module Unit F7269N3, 00 Version Sharp Realizado Verificado Aprobado Front aSchematic 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 Video Processor Block DiagramBlock Diagram 72GF-66E Picture Tube Parts DescriptionMother Unit Tuner Integrated CircuitsCoils Packaged CircuitsCeramic Filters TransformersUVZ2C2R2MEH1TA Nichicon Ceram C 5PF 50V 2125SMDCeram C 1UF 16V 2125SMD Ceram C DE1410 E332M-KX ResistorsCeram C 220PF 2KV MET OX RES 1KOHM 5% 1W MET Film R 1 OHM 5% 2WSET 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 TZMC3V3 TFK SMD Zener Diode TZMC24 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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