JVC AV-20NMG3/-A Ad justment part Description Remote, Secam Control unit, BL Adjust, Bl Ack

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

Item

Measuring

Test point

instrument

 

 

 

Ad justment part

Description

Ad justment

Remote

 

7.SECAM

of SECAM

control unit

 

BL ADJUST

 

 

BL ACK

Signal

 

 

 

 

 

 

OFFSET

generator

 

 

 

 

 

 

 

KEY ASSIGNMENT OF REMOTE CONTROL UNIT

COLOUR

 

 

ON

 

 

1

2

3

COLOUR

 

 

OFF

 

 

4

5

6

7

8

9

[Method of adjustment using measuring instrument]

1.Input a SECAM full field colour bar signal.

2.Enter the SERVICE MENU.

3.Select 2. V/C from SERVICE MENU.

4.Select 7. SECAM BL ADJUST with /MENU key.

5.Set the initial setting value with the – or + MENU key.

6.Switch the key (colour OFF) and key (colour ON) on the remote control and make sure that there is no colour on the black and white screen.

7.If the black and white screen is not best with the initial setting value, make fine adjustment until you get the best black and white screen.

8.While watching the screen, adjust the value to be the same colour between ON & OFF by ten key on the remote control unit.

9.Press the DISPLAY key twice to return to the normal screen.

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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 Model Name Main Difference ListPart 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 PAL Secam PresetSound System Do Not Adjust Setting item Locations of Front Panel Buttons and LAM PS Replacement of IC301 if V/C DecoderProcedures 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 Socket TintCRT Secam Control unit BL AdjustAd justment part Description Remote BL ACKDeflection Circuit Adjustment PositionScurve VSM Preset SettingVER. Scurve TOP# P/C Magnets Purity / Convergence AdjustmentPurity Adjustment Static Convergence Adjustment Dynamic Convergence AdjustmentSoldering Iron Replacement of Chip ComponentReplacement Steps AV-20N3 AV-20NMG3 AV-20NMG3B