JVC AV-20NMG3B, AV-20N3/D, AV-20NMG3/-A service manual Service Menu Flow Chart

Page 18

AV-20N3

AV-20NMG3

AV-20NMG3B

SERVICE MENU FLOW CHART

SERVICE MENU

 

SUB MENU 1. IF

 

 

 

 

SERVICE MENU

 

 

 

 

VCO (CW)

***.** MHz

 

 

IF

 

TOO HIGH

 

 

1.IF

2.V/C

 

 

ABOVE REFERENCE

 

 

 

 

JUST REFERENCE

3.DEF

4.VSM PRESET

 

1. VCO

 

 

5.PRESET

 

 

 

 

BELOW REFERENCE

 

 

2. DELAY POINT

 

 

TOO LOW

 

 

6.SETUP TOUR OFF

 

 

 

 

 

 

 

AFT ADJUST

 

** *(* *)

 

 

 

 

 

 

 

 

1-6 SELECT

DISP : EXIT

 

 

 

 

VCO ADJUST

 

** *(* *)

****** *****

**.***

1-2 : SELECT

 

DISP: EXIT

FINE

 

DISP : EXIT

***

**

** ** ***

 

 

 

 

 

 

 

 

 

 

 

 

 

6.SETUP TOUR

OFF

 

 

 

 

 

 

 

 

 

 

 

SUB MENU 2. V/C

DELAY POINT

UHF

 

 

ON / OFF

 

 

 

 

 

 

 

 

 

 

AGCTAKE-OVER

**

 

(By pressing 6-key)

 

 

 

 

 

 

V/C

 

PAL

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1. CUTOFF

 

(R) * **

- / + : OPERATE

DISP: EXIT

 

 

 

 

 

 

 

 

 

 

 

 

 

(G) * **

 

 

 

 

 

 

 

 

 

(B) * **

 

 

 

 

 

 

 

50Hz

 

 

 

 

 

 

 

 

/

:SELECT

 

 

 

 

 

 

 

 

- / + : OPERATE

 

DISP : EXIT

 

 

 

 

 

 

 

SUB MENU 3. DEF

 

 

 

 

 

 

DEF

 

PAL

 

 

 

 

 

 

1. VER. POSITION

 

***

 

 

 

 

 

 

 

50Hz

 

 

 

 

 

 

 

 

/

:SELECT

 

 

 

 

 

 

 

 

- / + : OPERATE

 

DISP : EXIT

 

 

 

 

 

 

SUB MENU 4. VSM PRESET

 

 

 

 

 

 

 

BRIGHT

 

 

 

 

 

 

 

 

TINT

 

**

 

 

 

 

 

 

 

COLOUR

 

**

 

 

 

 

 

 

 

BRIGHT

 

**

 

 

 

 

 

 

 

CONT.

 

**

 

 

 

 

 

 

 

SHARP

 

**

 

 

 

 

 

 

/

:SELECT

 

 

 

 

 

 

 

 

- / + : OPERATE

 

DISP : EXIT

 

 

 

 

 

 

SUB MENU 5. PRESET

 

 

 

 

 

 

 

PRESET

PAL

 

 

 

 

 

 

 

1. C-TRAP FIX

 

***

 

 

 

 

 

 

 

50Hz

 

B/G

 

 

 

 

 

 

/

:SELECT

 

 

 

 

 

 

 

 

- / + : OPERATE

 

DISP : EXIT

 

 

 

18

 

 

 

No. 52025

 

 

 

Image 18
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