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Resumen del manual
NO PICTURE Check the waveform of I101 #46 NG : GO to the figure c OK : Go the figure d U102 TUNER I701 MICOM XC701 32.768KHz #10 #11 #12 ST-BY 5V #29 #30 Check the crystal T-DATA T-CLOCK 5V33V IF OUT Check the voltages #14 AFT #27 #28 SDA SCL Check IF Vcc (5V) Check clock/data signal Check clock/data signal c I101 #44Z501 C525 Check composite video #18 Check RBG Vcc (9V) #19 #20 #21 Check RBG signal output #13 Check ABL current #25 #43 d I101 SF101 SAW FILTER #5 #6 #10 #8 #11 #12 #3 #4 Check IF AGC voltage Check RF AGC voltage #46 #44 Z501 4.5M Trap Check the waveform T402 FBT Check HOR/BUS Vcc(5V) Check CHROMA/VER Vcc(5V) D405 Check 200V LINE R412 Check heater voltage 21V -3V 22 TROUBLESHOOTING GUIDE 3. NO SOUND Check audio output signal of I101 #1 NG : Go to the figure e OK : Go to the figure f U102 TUNER I701 MICOM XC701 32.768KHz #10 #11 #12 ST-BY 5V #29 #30 Check the crystal T-DATA T-CLOCK 5V33V IF OUT #14 AFT #27 #28 SDA SCL I101 SF101 SAW FILTER #5 #6 #10 #8 #11 #12 Check IF Vcc (5V) Check clock/data signal #3 Check IF AGC voltage e I601 TDA7267A #1 #4 f #52 #54 Check SIF output signal If no signal, then change I101 Check SIF input signal #9 5VCheck FM filter circuit Check Vcc of the sound AMP R601 C602 SOUND 12V C603 Audio in Check audio signal in #2 C605 speaker Check audio signal out #3 Q601 Micom #40 Audio MUTE H:Mute L:NormalC604 Check L:Mute / H:Normal 23 TROUBLESHOOTING GUIDE 4. CH DON’T STOP Check the input signal conditions NG : Loss of signal or weak signal OK : Go to the figure g U102 TUNER I701 MICOM #11 #12 #29 #30 T-DATA T-CLOCK 5V33V IF OUT #14 AFT #27 #28 SDA SCL h AGC IN XC701 32.768KHz #10 ST-BY 5V Check the crystal I703 EEPROM #8 ST-BY 5V #5 #6 SDA SCL Check SDA/SCL Check 5V/33V LINE #15 C103 Check RF AGC Voltage Check AFT window Voltage 2.1V~2.5V SF101 SAW FILTER I101 #11 #12 #10 #4 RF AGC OUTPUT #49 #48 L501 VCO COIL Check VCO coil 24 TROUBLESHOOTING GUIDE 5. NO COLOR I101 #44 composite video in Check C.V.S waveform #43 Video/Chroma/Deflection Vcc Check the voltage #38 X502 Check the crystal #18 #19 #20 #21 RGB Vcc (9V) Check the voltage R OUT G OUT B OUT Check R/G/B signal 6. NO VERTICAL DEFLECTION #43 Video/Chroma/Deflection Vcc Check the voltage X502 #24 C507 C508 V RAMP ALC filter 5V Check the voltage ( 2.5V ) I301 LA7841#23 Vertical output #6 Vertical IC Vcc (25V) Check the voltage (25V) #5 (Invert RAMP in) #3 C307 (Output) Check vertical output signal Vertical D.Y. Check the waveform If no output, then change I301 I101 25 ROUBLESHOOTING GUIDE 7. NO ON-SCREEN DISPLAY I701 MICOM XC701 32.768KHz #10 #11 #...
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