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STATIC CONVERGENCE ADJUSTMENT 

 

1.  Input a crosshatch signal. 
 
2.  Using 4-pole convergence magnets overlap the red 

and blue lines in the center of the screen (Fig. 1) and 
turn them to magenta (red/blue). 

 
3. Using 6-pole convergence magnets overlap the 

magenta (red/blue) and green lines in the center of the 
screen and turn them to white. 

 
4. Repeat 2 and 3 above, and make the best 

convergence. 

 
 
 

DYNAMIC CONVERGENCE ADJUSTMENT 

 

 

13

 
1.  Move the deflection yoke up and down and overlap 

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 the best 

convergence. 

 
 
 
 
 
 
 
After adjustment, fix the wedge at the original position. 
Fasten the retainer screw of the deflection yoke. 
Fix the 6 magnets with glue. 

 

(FRONT VIEW)

Fig. 1 

(FRONT VIEW) 
 

                         

  RED        GREEN    BLUE 

 

 BLUE 

                   

RED 

 

GREEN 

 

 

 

 

 

 

  GREEN 
                   

RED    

 

 

 

 

 

 

  BLUE 
 
 
 

 

BLUE      GREEN      RED

                   

Fig.2

 

(FRONT VIEW) 

 
RED    GREEN    BLUE                BLUE    GREEN    RED 

       

RED 

                   

GREEN

                   

BLUE 

 
 

               

 
BLUE 

             

GREEN

                   
RED 

Fig. 3 

 

 

 

Summary of Contents for NS-F20C

Page 1: ...COLOUR TELEVISION SERVICE MANUAL Models NS F20C Edition 2007 3 1...

Page 2: ...CONTENTS 1 Safety precautions 3 2 TV block diagram 4 3 Replacement of memory IC 5 4 Service adjustment 5 5 ICs functional description 10 6 Test point waveform 10 7 All ICs voltages 10 2...

Page 3: ...t 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 groun...

Page 4: ...4 2 Block diagram TDA8377 PS N3 2 series with mono intercarrier sound demodulator...

Page 5: ...ata adjustment of corresponding factory menus Press EXIT key to exit factory mode Focus adjustment 1 Receive a crosshatch signal 2 While watching the screen adjust the FOCUS VR on the FBT to make the...

Page 6: ...ode drive level 31 AGC IF AGC speed VG2B VG2 Brightness IFO Off set IF demodulator 5 Picture preset 1 0CON Listen Contrast 0 A 0BRI Listen Brightness 0 A 0COL Listen Colour 50 A 0SHP Listen Sharpness...

Page 7: ...1 Enable 0 EA Bit 2 FMWS 1 Enable 0 EA Bit 1 RESERVE 1 Enable 1 EA Bit 0 AVL 1 Enable 1 EA 3 OP3 Bit Function Description Preset Remark Bit 7 TDA8377 1 Enable 1 EA Bit 6 16 9 1 Enable 0 EA Bit 5 RESER...

Page 8: ...I 2 C bus data line TUNING 4 tuning Voltage Vt PWM output KEY 5 Control keys input SYSTEM 6 TV system control VOL 7 Sound Volume control PWM output MUTE 8 Sound mute output VSSC P 9 Digit ground for...

Page 9: ...supply of TV processor 3 3 V VPE 55 Ground VDDC 56 Digital supply to core 3 3 V OSCGND 57 Oscillator ground supply XTALIN 58 Crystal oscillator input XTALOUT 59 Crystal oscillator output RESET 60 Grou...

Page 10: ...DA8377 PIN38 5Vpp 0 9Vpp CRT KB CRT KG CRT KR 95Vpp 95Vpp 95Vpp H H H 7 IC voltages TDA8377 PIN 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 V 0 3 8 3 6 3 3 3 5 4 4 5 1 1 8 0 0 18 0 17 0 2 3 8 5 3 PIN 17 18...

Page 11: ...5 1 3 3 5 TDA8357 PIN 1 2 3 4 5 6 7 8 9 V 0 8 0 7 16 6 9 0 43 7 2 0 3 7 2 AN 7522N PIN 1 2 3 4 5 6 7 8 9 10 11 12 V 10 4 4 0 4 4 2 75 1 4 0 1 4 0 35 4 4 0 4 4 24C08 PCF8598 PIN 1 2 3 4 5 6 7 8 V 0 0...

Page 12: ...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...

Page 13: ...nvergence DYNAMIC CONVERGENCE ADJUSTMENT 13 1 Move the deflection yoke up and down and overlap lines in the periphery Fig 2 2 Move the deflection yoke left to right and overlap the lines in the periph...

Page 14: ...TZJ5 1B DZ102 63V 0 1 F C101 1 6W 68K R261 1N4148 VD217 1 6W 9 1K R260 1 6W 1K R227 1 6W 9 1K R262 B4 12V C214 104 SYSTEM 1W 33 R110 LGA0203 100 L102 SDA SCL 1 6W 22 R103 SPEAKER SPEAKER INPUT INPUT 2...

Page 15: ...Sincere Forever 15...

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