JVC AV-1435EE Adjustments, B1 Power Supply, Focus Adjustment, If Circuit Adjustment, Focus VR

Page 20

AV-14F3/AV-1435

AV-1435EE/AV-1435TEE

AV-14FMT3/AV-1438

AV-14FMG3/AV- 14FMG3B

ADJUSTMENTS

B1 POWER SUPPLY

Item

Measuring

Test point

Ad justment part

Description

instrument

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Check of

Signal

TP-91 ( B1)

 

1.Input a whole black signal.

B1 Power

generator

TP-E (#)

 

2.Connect a DC voltmeter to TP-91(B1) and TP-E (#).

Supply

 

 

 

 

 

3.Make sure that the voltage is DC116.5±2.0V.

 

DC Volt-

 

 

 

 

 

 

 

meter

 

 

 

 

 

 

 

 

FOCUS ADJUSTMENT

Item

Measuring

Test point

Ad justment part

Description

instrument

 

 

 

 

 

 

 

 

 

Ad justment

Signal

 

FOCUS VR

1.Input a cross-hatch signal.

of FOCUS

generator

 

[In HVT]

2.While watching the screen, adjust the FOCUS VR to make the

 

 

 

 

 

 

 

vertical and horizontal lines as fine and sharp as possible.

 

 

 

 

3.Make sure that when the screen is darkened, the lines remain in

 

 

 

 

good focus.

 

 

 

 

 

IF CIRCUIT ADJUSTMENT

 

 

Item

 

Measuring

 

 

Test point

 

Ad justment part

Description

 

 

 

instrument

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Ad justment

 

Signal

 

 

 

 

 

 

1. VCO

Please use signal generator which is correct proof about the

of VCO(CW)

 

generator

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

sending frequency.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Remote

 

 

 

 

 

 

 

 

1.Input the PAL full colour bar (210.25MHz) signal.

 

 

 

 

control unit

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2.Enter the SERVICE MENU.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3.Select 1.IF from the SERVICE MENU.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4.Press 1 key and select 1.VCO.

 

 

 

VCO (CW) ***.** MHz

 

 

 

 

 

 

 

 

 

 

 

 

 

5.Select VCO ADJUST with MENU /key.

 

 

 

TOO HIGH

 

 

 

 

 

 

 

 

 

 

 

ABOVE REFERENCE

 

 

 

 

 

 

 

 

6.Press MENU -/+ key until the colour of the characters TOO

 

 

 

JUST REFERENCE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

YELLOW

HIGH changes blue to yellow. Then gradually press the MENU

 

 

 

BELOW REFERENCE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

-/+ key until the TOO LOW changes yellow. At this time, confirm

 

 

 

TOO LOW

 

 

 

 

 

 

 

 

 

 

 

AFT ADJUST

** *(* *)

 

 

 

 

 

that the value of VCO ADJUST is near +00.

 

 

 

VCO ADJUST

** *(* *)

 

 

 

 

 

7.Select AFT ADJUST with MENU /key.

 

 

 

FINE

 

 

 

 

 

 

Do no t adjust

 

 

 

DISP : EXIT

 

 

8.Press MENU -/+ key until the characters JUST REFERENCE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

changes blue to yellow.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

9.Press the DISPLAY key three times to return to normal screen.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TOO HIGH

ABOVE REFERENCE

JUS T R EFE RE NC E

BELOW REFERENCE

TOO LOW

ADJUSTMENT AT THIS POINT IS USELESS

ADJUSTMENT POINT

20

No. 52026

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Contents Contents AV-14F3 / AV-1435 AV-14FMT3 / AV-1438 SpecificationsEnts Safety Precautions Features Functions Rear TerminalRemote Control Unit Model Name Main Difference ListPart Name Specific Service Instructions AV-14FMG3/AV- 14FMG3B KEY Assignment of Remote Control Unit Service Menu System CONSTANT-ⅠSystem CONSTANT-Ⅱ System CONSTANT-ⅢSetting of System Constant SET Setting value Setting item Setting contentsUser Setting Values Setting item Setting valueInitial Setting Value of Service Menu Preset Sound System Do Not Adjust Setting itemPAL Secam NT SCLocations of Front Panel Buttons and LAM PS Replacement of IC301 if V/C DecoderProcedures Service Adjustments Before Starting Service AdjustmentAdjustment Items Measuring Instrument and FixturesBasic Operation of Service Menu KEY Assignment of Remote Control UnitMethod of setting C, 3.DEF and 4.VSM PresetSetup Tour Should be OFFService Menu Flow Chart Adjustment Locations TP-E CRT Earth Wire Braided AssyUpperfocus LowerscreenAdjustments B1 Power SupplyFocus Adjustment If Circuit AdjustmentDelay Point PointAGC MatsushitaVideo / Chroma Circuit Adjustment Method of adjustment without measuring instrument SUB BrightAd justment Remote SUBMethod of adjustment using measuring instrument SUB GeneratorColour Ⅱ Oscillo TP-E #Socket TintCRT BL Adjust Test point Ad justment part Description RemoteSecam Control unit BL ACKDeflection Circuit Adjustment PositionVSM Preset Setting VER. ScurveScurve TOP# P/C Magnets Purity / Convergence AdjustmentPurity Adjustment Static Convergence Adjustment Dynamic Convergence AdjustmentSoldering Iron Replacement of Chip ComponentReplacement Steps No.52026