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SERVICE MANUAL

 

16

2.Features 

 

 

MCU CCD 

Decoder

 

High speed 8-bit CPU (TLCS-870/X series) 

Digital data slicer for NTSC 

Instruction execution time: 0.5  s (at 8 MHz) 

 

 

OSD

 

(TMPA8873CPANG) 

Clock generation for OSD display 

48-Kbytes ROM, 2-Kbytes RAM 

Clock generation for OSD display 

ROM correction 

Font ROM characters: 384 characters 

12 I/O ports   

Characters display: 32 columns 

×

12 lines 

14-bit PWM output 1 ch for a voltage synthesizer 

Composition: 16 

×

18 dots 

7-bit PWM output 1 channel 

Size of character: 3 (line by line) 

8-bit A/D converter 3 ch for a touch-key input with 

Color of character: 8 (character by character) 

key ON wake-up CIRCUIT 

Display position: H 256/V 512 steps 

Remote control signal preprocessor 

BOX function 

Two 16-bit internal timer/counter 2 ch 

Fringing, smoothing, Italic, underline function 

Two 8-bit internal timer/counter 2 ch 

Conform to CCD REGULATION 

Time base timer, watchdog timer 

Jitter elimination 

16 interrupt sources: external 5, internal 11 

 

IIC bus interface (multi-master) 

 

STOP and IDLE power saving modes

 

 

TV Processor 

 

IF

 

RGB/Base-Band

 

Integrated PIF VCO aligned automatically   

Integrated 1 H base-band delay line 

Negative demodulation PIF 

Base-band TINT control 

Multi-frequency SIF demodulator without external   

Internal OSD interface 

Tank-coil  

Half-tone and transparent for OSD 

SIF BPF built-in   

External YCbCr interface for DVD 

SIF Trap filter built in 

RGB cut-off/drive controls by bus 

Video

 

ABCL (ABL and ACL combined) 

Integrated chroma traps

 

Sync. 

Black stretch 

Integrated f

×

640 VCO 

Y-gamma 

DC coupled vertical ramp output (single) 

Chroma  

 

Sync output 

Integrated chroma BPFs   

AV Switch

 

PAL/NTSC demodulation   

2 for video 

 

2 for audio(mono) 

 

or 1 for audio (Stereo, 2ch ATT), controlled by IIC bus 

 

ALC (Auto-Audio Level Control) 

 
 

Summary of Contents for SF21GA63

Page 1: ...COLOR TELEVISION SERVICE MANUAL MODEL NO CHASSIS NO ETA 1U Please read this manual carefully before service SF21GA63...

Page 2: ...CT SAFETY NOTICE 2 SAFETY SYMBOL DESCRIPTION 3 MAINTENANCE 3 ADJUSTMENTS 4 SET UP ADJUSTMENTS 4 CIRCUIT ADJUSTMENTS 7 STRUCTURE AND CHASSIS FUNCTION DESCRIPTION 13 STRUCTURE BLOCK DIAGRAM 13 CHASSIS D...

Page 3: ...ICE below 4 Service and adjustment of the TV may result in changes in the nominal EHT voltage of the CRT anode So ensure that the maximum EHT voltage does not exceed the rated value after service and...

Page 4: ...se characteristics are often passed unnoticed by a visual inspection and the X ray radiation protection afforded by them cannot necessarily be obtained by using replacements rated at higher voltages o...

Page 5: ...ts identified by the VDE marking have special safety related characteristics MAINTENANCE 1 Place the TV set on a stable stand or base that is of adequate size and strength to prevent it from being acc...

Page 6: ...t 1 3 Operate the TV for at least 15 minutes 1 4 Degauss the TV set using a specific degaussing coil 1 5 Set the brightness and contrast to maximum 1 6 Counter clockwise rotate the R B low brightness...

Page 7: ...Adjust two tabs of the 6 pole magnet to superimpose red blue line and green line 2 1 6 Remember red and blue movement Repeat steps 2 1 3 2 1 5 until optimal convergence is obtained 2 2 Circumference...

Page 8: ...en the lamp screw holding the deflection yoke assembly Fig 2 4 pole Magnet Movement 6 pole Magnet Movement Center Convergence by Convergence Magnets Incline the Yoke Up or Down Incline the Yoke Right...

Page 9: ...the TV 1 5 Repeat the above steps until the TV is degaussed completely 2 Confirmation and Adjustment for Voltage Caution B voltage has close relation to high voltage To prevent X ray radiation set B v...

Page 10: ...ng the back cover look for the FBT on the main PCB There should be a FCB on the FBT 4 2 Power on the TV and preheat it for 15 min 4 3 Receive a normal TV signal Rotate knob of the FCB until you get a...

Page 11: ...us data GDET0103 05 Table 3 Function Description for Bus Data Symbol Description Data OSD OSD Horizontal Position 4D OPT Optional Setting B3 RCUT R CUT OFF OPT GCUT G CUT OFF OPT BCUT B CUT OFF OPT GD...

Page 12: ...TS Hight 60Hz difference from HIT OPT VLIN V Linearity 50Hz OPT PAGE6 VLIS V Linearity 60Hz difference from VLIN OPT VSC VS Correction 50Hz OPT VSS VS Correction 60Hz OPT HBOW OPT HPARA OPT UBLACK 0B...

Page 13: ...T 04 STBG S TRAP B G 06 STI S TRAP I 08 STDK S TRAP D K 08 STM S TRAP M 03 SSBG S TRAP HP LP B G 08 SSI S TRAP HP LP I 08 SSDK S TRAP HP LP D K 08 PAGE13 SSM S TRAP HP LP M 09 SYNC 03 SYBBN BB judgeme...

Page 14: ...n 1 Second turn on 1 Bit1 0 NO signal 50Hz 1 NO signal 60Hz 1 Bit2 1 Bit3 Search speed 0 Bit4 0 KEY Turn on 1 POWER Turn on Bit5 FM_band 0 Normal 1Wide 0 Bit6 COLOR 0 NTSC PAL N PAL N 1 NTSC 0 Bit7 0...

Page 15: ...UCTURE AND CHISSIS FUNCTION DESCRIPTION 1 STRUCTUE BLOCK DIAGRAM 13 Audio Amplifier TMP8873 Video Amplifier H OUT V OUT Power Supply Circuit TUNER AVIN AVIN AVOUT IR KEY Structure Block Diagram for ET...

Page 16: ...nd bus control EEPROM AT24C16 for data memory LA78040 for vertical output power amplifying TFA9842AJ for audio power amplifying Thick film IC STR G5653 for power circuit adjustment and control The fol...

Page 17: ...P package The MCU contains 8 bit CPU ROM RAM I O ports timer counters A D converters an on screen display controller remote control interfaces IIC bus interfaces and the Closed Caption decoder The TV...

Page 18: ...g Italic underline function Two 8 bit internal timer counter 2 ch Conform to CCD REGULATION Time base timer watchdog timer Jitter elimination 16 interrupt sources external 5 internal 11 IIC bus interf...

Page 19: ...SERVICE MANUAL 3 Block Diagram 17...

Page 20: ...ble through the IIC bus of the internal connections 2 Power Supply TMPA8873 has some power supplies and GND pins Power supplies related MCU must be applied at the first Power supplies for H VCC and TV...

Page 21: ...SERVICE MANUAL 5 TERMINAL INTERFACE 19...

Page 22: ...SERVICE MANUAL 20...

Page 23: ...SERVICE MANUAL 21...

Page 24: ...SERVICE MANUAL 22...

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