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JVC AV-N21202/S, Service Manual

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JVC AV-N21202/S Service Manual Download Page 6

No. 51830

C-N21102
C-N21210
AV-N21202

6

FRONT CABINET

CRT SOCKET PWB

(Within MAIN PWB)

SPEAKER

REAR COVER

Fig.1

A

CONTROL KNOB

MAIN PWB

B

D

PB STOPPER

This exploded view describes

about the AV-N21202.

Although the C-N21102/S and C-

N21210/S is slightly different from

this figure, you can use this figure

for disassembling the C-

N21102/S and C-N21202/S in the

same steps.

D

C

DEG. COIL

BRAIDED ASS’Y

Summary of Contents for AV-N21202/S

Page 1: ...Aug 2001 C N21102 S C N21210 S AV N21202 S CONTENTS SPECIFICATIONS 2 SAFETY PRECAUTIONS 3 FEATURES 4 MAIN DIFFERENCE LIST 4 SPECIFIC SERVICE INSTRUCTIONS 5 SERVICE ADJUSTMENTS 9 PARTS LIST 25 OPERATING INSTRUCTIONS STANDARD CIRCUIT DIAGRAM 2 1 SERVICE MANUAL COLOR TELEVISION BASIC CHASSIS FV4 ...

Page 2: ...ls Intermediate Frequency Video IF Carrier Sound IF Carrier Color Sub Carrier 45 75MHz 41 25MHz 4 5MHz 3 58MHz 45 75MHz 41 25MHz 3 58MHz Power Input 120V AC 60Hz Power Consumption 87W Picture Tube 21 51cm Measured Diagonally High Voltage 26 5kV 1kV at zero beam current Speaker 5 9cm Oval type 1 5 9cm Oval type 2 Audio Power Output 1W 1W 1W Input Video Input Audio Input 1Vp p 75Ω RCA pin jack 500mV...

Page 3: ...es approved by the manufacturer of the complete product 8 Do not check high voltage by drawing an arc Use a high voltage meter or a high voltage probe with a VTVM Discharge the picture tube before attempting meter connection by connecting a clip lead to the ground frame and connecting the other end of the lead through a 10kΩ 2W resistor to the anode button 9 When service is required observe the or...

Page 4: ...ith 75ΩV U in common F Type ANT Terminal SLEEP TIMER for setting in real time Closed caption broadcasts can be viewed Audio Video input terminal Variable Audio output terminal Only for AV N21202 s Built in MTS system Only for AV N21202 s MAIN DIFFERENCE LIST Between C N21102 S C N21210 S and AV N21202 S Monaural model Monaural model Stereo model Model Parts Name C N21102 S C N21210 S AV N21202 S M...

Page 5: ...marked from the cabinet bottom 2 Pull out the MAIN PWB as it is If necessary take off the wire clamp and connectors etc REMOVING THE SPEAKER After removing the MAIN PW board 1 Remove the 2 screws marked For C N21102 S and C N21210 S SPEAKER 1 AV N21202 S SPEAKER 2 CHECKING THE MAIN PW BOARD 1 To check the back side of the MAIN PW Board 1 Pull out the MAIN PWB Refer to REMOVING THE MAIN PWB 2 Erect...

Page 6: ...R COVER Fig 1 A CONTROL KNOB MAIN PWB B D PB STOPPER This exploded view describes about the AV N21202 Although the C N21102 S and C N21210 S is slightly different from this figure you can use this figure for disassembling the C N21102 S and C N21202 S in the same steps D C DEG COIL BRAIDED ASS Y ...

Page 7: ... the Fig 2 SYSTEM CONSTANT screen 4 Refer to the SYSTEM CONSTANT table and check the setting items Where these differ select the setting item with the MENU UP DOWN key and adjust the setting with the MENU LEFT RIGHT keys The letters of the selected item are displayed in yellow 5 After adjusting release the MENU LEFT RIGHT key to store the setting value 6 Press the EXIT key twice to return the norm...

Page 8: ...SET VOLUME INPUT TV VIDEO OFF CH 02 See OPERATING INSTRUCTIONS 10 TV DISPLAY SLEEP TIMER VIDEO STATUS OFF 0 STANDARD 2 Setting of MENU TINT COLOR PICTURE BRIGHT DETAIL CENTER CENTER CENTER CENTER CENTER BASS TREBLE BALANCE MTS TV SPEAKER CENTER CENTER CENTER STEREO ON NOISE MUTING SET VIDEO STATUS ON ALL CENTER SET CLOCK ON OFF TIMER LANGUAGE CLOSED CAPTION BACKGROUND Unnecessary to set NO SPANISH...

Page 9: ... preset the following functions with the remote control unit VIDEO STATUS STANDARD BASS TREBLE BALANCE CENTER Only for AV N21202 S TINT COLOR PICTURE BRIGHT DETAIL CENTER ADJUSTMENT EQUIPMENT 1 DC voltmeter or digital voltmeter 2 Oscilloscope 3 Signal generator Pattern generator NTSC 4 Remote control unit 5 TV audio multiplex signal generator 6 Frequency counter ADJUSTMENT ITEMS Adjustment items A...

Page 10: ...e the indication of SLEEP 0 MIN is being displayed press DISPLAY key and VIDEO STATUS key on the remote control unit simultaneously to enter the SERVICE MENU screen shown in the next figure page 2 SERVICE MENU screen selection Press the UP DOWN key of the MENU to select any of the following items The letters of the selected items are displayed in yellow PICTURE SOUND Only for AV N21202 S GAME LOW ...

Page 11: ...IT HIGH LIGHT EXIT EXIT BY IT TOO HIGH ABOVE REFERENCE BELOW REFERENCE TOO LOW SYNC YES EXIT SELECT BY OPERATE BY EXIT BY IT RF AFC FINE STATUS EXIT SERVICE MENU MAIN MENU SCREEN HIGH LIGHT MODE VCO CW MODE GAME MODE SELECT BY OPERATE BY EXIT BY IT TINT COLOR PICTURE BRIGHT DETAIL EXIT RF AFC CHK MODE DO NOT ADJUST ON LOW LIGHT MODE PICTURE MODE SOUND MODE SELECT BY OPERATE BY EXIT BY IT 1 IN LEVE...

Page 12: ...etion of the setting adjustment work press the EXIT key again The settings for LOW LIGHT and HIGH LIGHT are described in the WHITE BALANCE page of ADJUSTMENT The setting for VCO CW are described in the IF VCO page of ADJUSTMENT SELECT BY OPERATE BY EXIT BY IT 1 IN LEVEL STATUS EXIT SOUND MODE Only for AV N21202 S SELECT BY OPERATE BY EXIT BY IT 1 BRIGHT EXIT STATUS PICTURE MODE INITIAL SETTING VAL...

Page 13: ...usted in the video mode the setting values in each item are revised independently initial setting value No Setting Adjustment items Variable range C N21102 s C N21210 S AV N21202 S 1 BRIGHT 0 127 64 64 2 PICTURE 0 127 95 95 3 TV DTL TV DETAIL 0 63 26 26 4 TV BPF TV B P FILTER 0 1 0 0 5 TINT 0 127 70 70 6 COLOR 0 127 48 48 7 EXT BRI EXT BRIGHT 25 1 0 8 EXT PIC EXT PICTURE 25 0 0 9 EXT DTL EXT DETAI...

Page 14: ...15 5 LOW LIGHT MODE Setting Adjustment item Variable range initial setting value R CUTOFF G CUTOFF B CUTOFF 0 255 0 255 0 255 20 20 20 HIGH LIGHT MODE Setting Adjustment item Variable range initial setting value G DRIVE B DRIVE 0 255 0 255 128 128 RF AFC CHK MODE Setting Adjustment item Variable range initial setting value RF AFC FINE ON OFF 77 77 ON DO NOT ADJUST ...

Page 15: ...ES being shown on the screen Then adjust CW TRANSF until BELOW REFERENCE mark turns yellow and confirm again SYNC YES being shown on the screen RF AGC adjustment No 19 RF AGC 1 Receive a broadcast 2 Select No 19 RF AGC of the PICTURE MODE 3 Press the MUTE key and turn off color 4 With the MENU LEFT key get noise in the screen picture 0 side of setting value 5 Press the MENU RIGHT key and stop when...

Page 16: ...e of No 13 V SIZE with the LEFT RIGHT key of the MENU 4 Adjust No 13 V SIZE until the vertical screen size is 92 H POSITION Adjustment Signal generator No 15 H POS 1 Receive a crosshatch signal 2 Select the No 15 H POS of the PICTURE MODE 3 Set the initial setting value of the No 15 H POS with the LEFT RIGHT key of the MENU 4 Adjust the No 15 H POS until the screen will be horizontally centered Sc...

Page 17: ...ntal line that is displayed becomes white using the to keys of the remote control unit 9 Turn the screen VR to where the single horizontal line glows faintly 10 Press the key to return to the regular screen The EXIT key is the cancel key for the WHITE BALANCE WHITE BALANCE High Light Adjustment Signal generator G DRIVE B DRIVE 1 Receive a black and white signal Color off 2 Select the HIGH LIGHT MO...

Page 18: ...t of the No 6 COLOR until you get the optimum color SUB TINT Adjustment No 5 TINT 1 Receive a broadcast 2 Select No 5 TINT of the PICTURE MODE 3 Set the initial setting value of the No 5 TINT with the LEFT RIGHT key of the MENU 4 If the tint is not best with the initial setting value make fine adjustment of the No 5 TINT until you get the optimum tint ADJUSTMENT OF MTS CIRCUIT Only for AV N21202 S...

Page 19: ...OUND MODE and reset the setting value from 1 to 0 MTS FILTER check No 5 FILTER 1 Select the No 5 FILTER of the SOUND MODE 2 Verify that the No 5 FILTER is set at its initial setting value MTS SEPARATION adjustment TV audio multiplex signal generator Oscilloscope L OUT R OUT AUDIO OUT No 6 LOW SEP No 7 HI SEP 1 Input a stereo L signal 300Hz from the TV audio multiplex signal generator to the antenn...

Page 20: ...me 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 CRT...

Page 21: ...ove and make best convergence DYNAMIC CONVERGENCE ADJUSTMENT 1 Move the deflection yoke up and down and overlap the lines in the periphery Fig 2 2 Move the deflection yoke left to right and overlap the lines in the periphery Fig 3 3 Repeat 1 and 2 above and make best convergence After adjustment fix the wedge at the original position Fasten the retainer screw of the deflection yoke Fix the 6 magne...

Page 22: ...OWN CIRCUIT 1 Turn the POWER SW ON 2 As shown in Fig 1 set the resistor between X connector 1 3 3 Make sure that the screen picture disappears 4 Temporarily unplug the power cord 5 Remove the resistor between X connector 1 3 6 Again plug the power cord make sure that the normal picture is displayed on the screen Fig 1 4 T522 CONNECTOR RESISTOR 16 7kΩ Ω Ω Ω 1 1 4W HEATER R562 D561 R561 X C561 R563 ...

Page 23: ...CK Grounding of shorting of the power supply output from the HVT to the vertical circuit and the small signal power supply is also detected The microcomputer detects at 1 second intervals If NG is detected for more than 1 ms a malfunction is interpreted When a malfunction has been detected the POWER is turned off While the POWER is being turned off the power key of the remote controller is not ope...

Page 24: ...th tweezers and remove the chip part Transistors diodes variable resistors etc 1 Apply extra solder to each lead 2 As shown in the figure push the part with tweezers and alternately melt the solder at each lead Shift and remove the chip part Note After removing the part remove remaining solder from the pattern 2 How to install Chip parts Resistors capacitors etc 1 Apply solder to the pattern as in...

Page 25: ...N21102S MEM 3 N21210S MEM 3 N21202S MEM 3 4 VP 0108 DP3051 VICTOR COMPANY OF JAPAN LIMITED HOME AV NETWORK BUSINESS UNIT 12 3 chome Moriya cho Kanagawa ku Yokohama Kanagawa prefecture 221 8528 Japan ...

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