Mitsubishi Electronics VS-60609 service manual Convergence Circuit Purpose

Page 37

MODELS: VS-45609 / VS-50609 / VS-55609 / VS-60609 / VS-60719 / VS-70709

[Convergence Circuit]

Purpose:

To set the Convergence circuit geometry adjustments.

18. Geometry Adjustment

Symptom:

Raster distortion at the top, bottom or sides of the picture.

Measuring

-----

Note: Vertical Height and Vertical Linearity Adjustments must be performed before

Instrument

this adjustment.

Test Point

-----

Coarse Adjustment

Ext. Trigger

------

1. Supply a Monoscope signal to the RF or Video Input.

Measuring

-----

2. Select the Monoscope as the signal source (Input button).

Range

3. Activate the Convergence Mode, Coarse Green Function

Input Signal

Monoscope

4. Adjust Item “5 HWID” so the sum of the horizontal markers is 7.6.

5. Set the data of the following items for straight crosshatch lines.

Input Terminal

RF or Video

• “3 SKEW” ... Skew

...• “4 TILT” Tilt

...• “6 HLIN” Horizontal Linearity

CONVERGENCE MODE

• “7 SPCC” ... Side Pin Cushion Correction

Activate ……..MENU-0-1-5-9

• “8 HKEY” ... Horizontal Keystone

• “9 TBPC” ... Top/Bottom Pin Cushion

Misc. ……………….……"6"

• “10 VKEY” ... Vertical Keystone

Coarse………………..…."5"

• “11 VWID” ... Height

Fine ……………………..."4"

• “12 VLIN” ... Vertical Linearity.

Color (R,G B or DF)...AUDIO

Note: If the raster centering changes during the adjustments, correct the

Item No………….…..VIDEO

centering using Items “1 HSTA” and “2 VSTA”.

Adjust/Move……….ADJUST

Fine Adjustment

Cursor Toggle….…..ENTER

6. Activate the Fine Green Convergence Mode. (Press 4)

Save & Exit…..MENU (twice)

7. Use the Cursor to adjust for straight crosshatch lines.

8. Exit the Convergence Mode.

Page 37

Image 37

Contents Models VZ9Mitsubishi Digital Electronics AMERICA, INC Page Contents Service Parts List Circuitry Block Diagrams Chip Parts Replacement Replacement PartsIntroduction Product Safety NoticeRadiation warning Safety PrecautionsLeakage current check Front Cabinet Disassembly Cabinet Disassembly Front ViewRefer to Parts List for Part Numbers Rear Cabinet Disassembly Cabinet Disassembly Rear ViewPage Table a Size Length1c. VS-70709 Cabinet Separation Precedure Cabinet Separation Procedure VS-70709DiamondShield Installation Procedure DiamondShield Removal ProcedureServicing the Diamondshield Top & Bottom Molding Clips Side Molding ClipsMajor Parts Locations Chassis Removal and PCB LocationsRemoval of the CRT CRT ReplacementPage Adjustment procedures after replacing the CRTs Test Signal Electrical AdjustmentsMonoscope Signal Color Bar SignalOption Menu Setup Initial SettingsDefault Settings Description Initial SettingError Code Operational Check LED Indicator DiagnosticsError Codes AV MemoryActivating the Circuit Adjustment Mode Adjustment FunctionsSelection of adjustment Functions Adjustment Items Changing DataConvergence Adjustment Mode Sub Functions Fine Conv PressCursor Cursor CoordinatesDisplay Saving Data and Exiting the Convergence ModeAudio Function Adjustment Items ListPIP Function HR Function Convergence Mode ItemsConv Misc Conv GreenConv Blue Conv REDDF Function VkeyPage Audio Circuit Purpose Service ModeInput Level Audio Function Abbrev DataDynamic Focus Symptom High Voltage Control SymptomConvergence Mode High Voltage Circuit PurposeFocus Verification Lens Focus Symptom Blurred pictureMENU-0-1-5-9 Color PressAbbr Data Service Mode CRT Cutoff SymptomCRT Circuit Purpose CRT CurrentService Mode Activate …….. MENU-0-1-5-7 Low Color TemperaturePIP Circuit Purpose Color and Tint SymptomPIP Insert Picture Cb, Cr Circuit Purpose 13. Cb, Cr Offset Symptom On-screen display is not positioned correctly Abbr Data Deflection Circuit Purpose Height and Vert. Linearity SymptomConvergence Circuit Purpose Convergence Circuit Purpose Coarse Convergence Color edging at the top, bottom and sides of the picture Fine Convergence SymptomChip Parts Removal Resistors, Capacitors, etc ReplacementChip Parts Removal Transistors Parts Ordering Critical and Warranty Parts DesignationParts Tolerance Codes Model AbbreviationsQuick Reference for Common Replacement Parts Remote ControlCRT Assemblies High Voltage / Deflection ComponentsIntegrated Circuits TubesTransistors DiodesCOIL-CHOKE ZTS6620 CoilsVariable Resistors TransformersResistors Carbon 1/4W 10K-J R521R529 Fuse 1/2W 0.82-JComposition 1/2W 4.7M-K Capacitors & TrimmersComposition 1/2W 1M-K CER-CHIP SL50V 470P-J CER-CHIP CH50V 82P-JCER-CHIP CH50V 47P-J CER-CHIP CH50V 68P-JC554 C552PLA-PP 200V 0.47M-J C568Poly 250VAC 0.1M-M C902 C901Poly 250VAC 0.1M-M C903 CER 250VAC 1000P-M C904Miscellaneous AccessoriesPrinted Circuit Boards Screen Parts Screen Assembly Circuitry Block Diagrams Power SupplyVIDEO/COLOR Signal Path Sound Circuit Deflection Protect Circuit Convergence Circuitry Control Circuit Page Page Page Page Page Page Page Page Page Page Page