JVC AV-1435EE, AV-14FMT3 Purity / Convergence Adjustment, Purity Adjustment, # P/C Magnets

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AV-14F3/AV-1435

AV-1435EE/AV-1435TEE

AV-14FMT3/AV-1438

AV-14FMG3/AV- 14FMG3B

PURITY / CONVERGENCE ADJUSTMENT

PURITY ADJUSTMENT

1.	Demagnetize CRT with the demagnetizer.
2.	Loosen the retainer screw of the deflection yoke.
3.	Remove the wedges.
4.	Input a green raster signal from the signal generator, and turn
	the screen to green raster.

W EDGE

CR T

DEFLECTION

YOKE

P

4 6

P / C

5.	Move the deflection yoke backward.
6.	Bring the long lug of the purity magnets on the short lug and
	position them horizontally. (Fig.2)
7.	Adjust the gap between two lugs so that the GREEN RASTER
	will come into the center of the screen. (Fig.3)
8.	Move the deflection yoke forward, and fix the position of the
	deflection yoke so that the whole screen will become green.
9.	Insert the wedge to the top side of the deflection yoke so that it
	will not move.
10.	Input a crosshatch signal.
11.	Verify that the screen is horizontal.
12.	Input red and blue raster signals, and make sure that purity is
	properly adjusted.

MAGNETS

#P/C MAGNETS

P : PURITY MAGNET

4 : 4 POLES (convergence magnets)

6 : 6 POLES (convergence magnets)

Fig.1

PURITY MAGNETS

Long lug

Short lug

Bring the long lug over the short lug and position them horizontally.

Fig.2

(FRONT VIEW )	GREEN RASTER

CEN TER

Fig.3

No. 52026

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Image 29

Contents Contents AV-14F3 / AV-1435 AV-14FMT3 / AV-1438 SpecificationsEnts Safety Precautions Features Rear Terminal FunctionsRemote Control Unit Model Name Main Difference ListPart Name Specific Service Instructions AV-14FMG3/AV- 14FMG3B System CONSTANT-Ⅰ KEY Assignment of Remote Control Unit Service MenuSystem CONSTANT-Ⅱ System CONSTANT-ⅢSetting value Setting item Setting contents Setting of System Constant SETUser Setting Values Setting item Setting valueInitial Setting Value of Service Menu Sound System Do Not Adjust Setting item PresetPAL Secam NT SCLocations of Front Panel Buttons and LAM PS Replacement of IC301 if V/C DecoderProcedures Before Starting Service Adjustment Service AdjustmentsAdjustment Items Measuring Instrument and FixturesKEY Assignment of Remote Control Unit Basic Operation of Service MenuC, 3.DEF and 4.VSM Preset Method of settingSetup Tour Should be OFFService Menu Flow Chart TP-E CRT Earth Wire Braided Assy Adjustment LocationsUpperfocus LowerscreenB1 Power Supply AdjustmentsFocus Adjustment If Circuit AdjustmentPoint Delay PointAGC MatsushitaVideo / Chroma Circuit Adjustment SUB Bright Method of adjustment without measuring instrumentAd justment Remote SUBSUB Generator Method of adjustment using measuring instrumentColour Ⅱ Oscillo TP-E #Socket TintCRT Test point Ad justment part Description Remote BL AdjustSecam Control unit BL ACKPosition Deflection Circuit AdjustmentVER. Scurve VSM Preset SettingScurve TOP# P/C Magnets Purity / Convergence AdjustmentPurity Adjustment Dynamic Convergence Adjustment Static Convergence AdjustmentSoldering Iron Replacement of Chip ComponentReplacement Steps No.52026