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Related Manuals for Haier NS-F20C
Summary of Contents for Haier NS-F20C
- Page 1 COLOUR TELEVISION SERVICE MANUAL Models: NS-F20C Edition: 2007-3-1...
- Page 2 CONTENTS Safety precautions……………………………………………………………..……………3 TV block diagram……………………………………………………………………..…….4 Replacement of memory IC………………………………………………………….……5 Service adjustment……………………………………………………………..…………...5 ICs functional description…………………………………………………………………10 Test point waveform………………………………………………………………………10 All ICs voltages……………………………..……………………………………………….10...
- Page 3 1. SAFETY PRECAUTIONS The design of this product contains special hardware, many Isolation Check circuits and components especially for safety purposes. For (Safety for Electrical Shock Hazard) continued protection, no changes should be made to the After re-assembling the product, always perform an isolation original design unless authorized in writing by the check on the exposed metal parts of the cabinet (antenna manufacturer.
- Page 4 Block diagram TDA8377 PS/N3/2 series with mono intercarrier sound demodulator...
- Page 5 3. REPLACEMENT OF MEMORY IC 1. MEMORY IC. This TV uses memory IC. In the memory IC are memorized data for correctly operating the video and deflection circuits. 2. PROCEDURE FOR REPLACING MEMORY IC (1) Power off Switch the power off and unplug the power cord from AC outlet. (2) Replace IC Be sure to use memory IC written with the initial data values.
- Page 6 Adjustable Items Direct access key Items Description Preset Remark “0” Adjust VG2 voltage “1” 5/6HSH Horizontal shift “2” 5/6VSL Vertical slop 5/6VAM Vertical amplitude 5/6SCL S-correction 5/6VSH Vertical shift 5/6VOF OSD Vertical offset HOF* OSD Horizontal offset “3” Black level offset R Black level offset G White point R White point G...
- Page 7 NOTE: THE ITEMS WITH REMARK “A” IS ADJUSTABLE DATA. Optional data Function Description Preset Remark Bit 7 RESERVE 1=Enable Bit 6 1=Enable Bit 5 Halftone 1=Enable Bit 4 1=Enable Bit 3 1=Enable Bit 2 Comb filter 1=Enable Bit 1 SVHS 1=Enable Bit 0 1=Enable...
- Page 8 Bit 6 FREQ 1= Enable Bit 5 AV SELECT AUDIO 1=Enable Bit 4 1=Enable Bit 3 RESERVE 1= Enable Bit 2 SPANISH 1= Enable Bit 1 FRENCH 1=Enable Bit 0 ENGLISH 1=Enable 6. OP6 Function Description Preset Remark Bit 7 RESERVE 1=Enable Bit 6...
- Page 9 SNDPLL/SIFAGC *1 Narrow band PLL filter Automatic Volume Levelling HOUT Horizontal output FBISO Flyback input/sandcastle output AUDEXT External audio output EHTO EHT/over voltage protection input PLL IF IF-PLL loop filter IFVO/SVO IF video output / selected CVBS output supply voltage TV processor CVBS INT internal CVBS input GND1...
- Page 10 Pump up power V PRO Vertical protection V OUT Vertical output V FEEDBACK Vertical feedback Ground 5. U101：Tuner Function Function vacant vacant Vt 33V IF Out 6. Test point Waveforms 3.8Vpp 2.5Vpp 2.5Vpp 1.2Vpp 2.6Vpp TDA8377 PIN38 TDA8377 PIN40 TDA8377 PIN53 TDA8377PIN52 TDA8377 PIN51 5Vpp...
- Page 11 TDA8357 AN 7522N 2.75 0.35 24C08/PCF8598 8. PURITY / CONVERGENCE ADJUSTMENT...
- Page 12 PURITY ADJUSTMENT WEDGE Demagnetize CRT with the demagnetizer. DEFLECTION YOKE Loosen the retainer screw of the deflection yoke. Remove the wedges. Input a green raster signal from the signal generator, and turn the screen to green raster. Move the deflection yoke backward. P/C MAGNETS Bring the long lug of the purity magnets on the short P: PURITY MAGNET...
- Page 13 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). (FRONT VIEW) 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.
- Page 14 MENU TV/AV AV1-VIN AV1-AL AV1-AR TJC3-2Y CNS01 RS01 CT01 CNB02 RT02 RS03 CNS02 RB05 RB04 RB03 RB02 RB01 CNB01 1.8K 1.2K CNT01 TJC3-2Y 1/6W-100 TJC3-10A A6-5V R208 A6-5V N202 R286 R220 R212 R211 R215 R278 R222 24C08 CN704 CN200 CN703 A6-5V 3.3K 3.3K...
- Page 15 Sincere Forever...