JVC AV-20N3/D, AV-20NMG3/-A Static Convergence Adjustment, Dynamic Convergence Adjustment

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AV-20N3 AV-20NMG3 AV-20NMG3B

STATIC CONVERGENCE ADJUSTMENT

1.Input a crosshatch signal.

2.Using 4-pole convergence magnets, overlap the red and blue lines in the center of the screen (Fig.1) and turn them to magenta (red/blue).

3.Using 6-pole convergence magnets, overlap the magenta(red/blue) and green lines in the center of the screen and turn them to white.

4.Repeat 2 and 3 above, and make best convergence.

DYNAMIC CONVERGENCE ADJUSTMENT

1.Move the deflection yoke up and down and overlap the lines in the periphery. (Fig. 2)

2.Move the deflection yoke left to right and overlap the lines in the periphery. (Fig. 3)

3.Repeat 1 and 2 above, and make best convergence.

After adjustment, fix the wedge at the original position. Fasten the retainer screw of the deflection yoke.

Fix the 6 magnets with glue.

(FRONT VIEW )

Fig.1

(FRONT VIEW )

RED GREEN BLUE

BLUE

RED

GREEN

GREEN

RED

BLUE

BLUE GREEN RED

Fig.2

(FRONT VIEW )

GREEN

GREEN

RED

BLUE

BLUE

RED

 

 

 

RED

 

 

 

GREEN

 

 

 

BLUE

 

 

 

BLUE

 

 

 

GREEN

 

 

 

RED

 

 

Fig.3

 

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No.52025

 

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Contents Contents AV-20N3 SpecificationsEnts AV-20NMG3Safety Precautions Micro Computer FeaturesMemory SCL 2/SDA2 VIDEO/CHROMA Decorder SCL 1/SDA1Functions Front Panel Rear TerminalRemote Control Unit Main Difference List Part NameModel Name Specific Service Instructions Disassembly ProcedureSpeaker System CONSTANT-Ⅰ KEY Assignment of Remote Control UnitService Menu System CONSTANT-ⅡUser Setting Values Setting of System Constant SETSetting item Setting contents Setting item Setting valueInitial Setting Value of Service Menu Preset Sound System Do Not Adjust Setting itemPAL Secam Replacement of IC301 if V/C Decoder ProceduresLocations of Front Panel Buttons and LAM PS Adjustment Items Service AdjustmentsBefore Starting Service Adjustment Measuring Instrument and FixturesBasic Operation of Service Menu KEY Assignment of Remote Control Unit Service MenuSetup Tour Method of settingC, 3.DEF and 4.VSM Preset Should be OFFService Menu Flow Chart TOP Adjustment LocationsSolder Side UpperfocusFocus Adjustment AdjustmentsB1 Power Supply If Circuit AdjustmentAGC Delay PointPoint AGC Take Over OtherVideo / Chroma Circuit Adjustment Ad justment Remote Method of adjustment without measuring instrumentSUB Bright SUBColour Ⅱ Tint CRTSocket Secam Control unit BL AdjustAd justment part Description Remote BL ACKDeflection Circuit Adjustment PositionScurve VSM Preset SettingVER. Scurve TOPPurity / Convergence Adjustment Purity Adjustment# P/C Magnets Static Convergence Adjustment Dynamic Convergence AdjustmentReplacement of Chip Component Replacement StepsSoldering Iron AV-20N3 AV-20NMG3 AV-20NMG3B