JVC AV-20N3 Features, Memory SCL 2/SDA2, Micro Computer, VIDEO/CHROMA Decorder SCL 1/SDA1, Tuner

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AV-20N3

AV-20NMG3

AV-20NMG3B

FEATURES

"New chassis design enables use of an interactive on-screen control.

"Wide range voltage (110V～240V) AC power input.

"With AUDIO / VIDEO INPUT & OUTPUT terminal.

"MUTING button can reduce the audio level to zero instantly.

"Functional remote control to operate T V set (for channel select, volume control, power ON/OFF, etc.) from a distance.

"I2C bus control utilizes single chip ICs for IF, V/C, DEF. VSM PRESET, PRESET & SETUP TOUR.

"By means of AUTO PROGRAM, the TV stations can be selected automatically and the TV channels can also be rearranged automatically.

"Built-in ECO MODE (ECONOMY, ECOLOGY)

In accordance with the brightness in a room, the brightness and / of contrast of the picture can be adjusted automatically to make the optimum picture which is easy on the eye.

"Built – in ON TIMER, RETURN + & CHILD LOCK.

SYSTEM BLOCK DIAGRAM

IC702

MEMORY

SCL 2/SDA2

IC701

MICRO

COMPUTER

IC301

VIDEO/CHROMA

DECORDER

SCL 1/SDA1

TU001

TUNER

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No. 52025

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Contents Contents Specifications EntsAV-20N3 AV-20NMG3Safety Precautions Features Memory SCL 2/SDA2Micro Computer VIDEO/CHROMA Decorder SCL 1/SDA1Functions Front Panel Rear TerminalRemote Control Unit Part Name Main Difference ListModel Name Specific Service Instructions Disassembly ProcedureSpeaker KEY Assignment of Remote Control Unit Service MenuSystem CONSTANT-Ⅰ System CONSTANT-ⅡSetting of System Constant SET Setting item Setting contentsUser Setting Values Setting item Setting valueInitial Setting Value of Service Menu Sound System Do Not Adjust Setting item PresetPAL Secam Procedures Replacement of IC301 if V/C DecoderLocations of Front Panel Buttons and LAM PS Service Adjustments Before Starting Service AdjustmentAdjustment Items Measuring Instrument and FixturesBasic Operation of Service Menu KEY Assignment of Remote Control Unit Service MenuMethod of setting C, 3.DEF and 4.VSM PresetSetup Tour Should be OFFService Menu Flow Chart Adjustment Locations Solder SideTOP UpperfocusAdjustments B1 Power SupplyFocus Adjustment If Circuit AdjustmentDelay Point PointAGC AGC Take Over OtherVideo / Chroma Circuit Adjustment Method of adjustment without measuring instrument SUB BrightAd justment Remote SUBColour Ⅱ CRT TintSocket BL Adjust Ad justment part Description RemoteSecam Control unit BL ACKDeflection Circuit Adjustment PositionVSM Preset Setting VER. ScurveScurve TOPPurity Adjustment Purity / Convergence Adjustment# P/C Magnets Static Convergence Adjustment Dynamic Convergence AdjustmentReplacement Steps Replacement of Chip ComponentSoldering Iron AV-20N3 AV-20NMG3 AV-20NMG3B