Panasonic TC-26LX70L Service Manual

Also see for TC26LX70L - 26" LCD TV: Operating instructions

Contents

Panasonic TC-26LX70L Service Manual Manual pdf 25 page image

12.3. MTS input level adjustmentInstrument Name Connect to Remarks1. FILTER JIG2. RMS VOLTAGE METER3. RF SIGNAL GENERATORTP2200-GND or TP1105-GND or TP1107-GNDFILTER JIGRF ANT. INPUTProcedure Remarks1. Apply following RF signal at antenna input.Video : Flat field , 30% modulationAudio : 300Hz ,100% modulation ,monaural(70dB±5dB ,75ohmOPEN ,P/S 10dB).NOTE : Make sure 75us Pre-emphasis is off.2. Choose MTSIN in MTS adjustment of factory mode.3. Adjust “MTSIN” data (Input level) until the RMS voltage.Meter indicates12.4. MTS stereo separation adjustmentInstrument Name Connect to Remarks1. OSCILLOSCOPE2. RF SIGNAL GENERATORTP1104-GND or TP1106-GNDor Monitor out R-GNDRF ANT. INPUTProcedure Remarks1. Select stereo mode in the audio menu.2. Apply following RF signal at antenna Input.Video : Flat field , 30% modulation.Audio : 300Hz ,30% modulation ,stereo (Left only)(70dB±5dB ,75ohmOPEN ,P/S 10dB)Note : After setting 30% modulation with P.L. SWAnd N.R. SW off , turn P.L. SW and N.R. SW ON.3. Choose SEPAL in MTS adjustment of factory mode.4. Adjust “SEPAL” data (Low-level separation) until the amplitude of the waveform on the oscilloscope isMINIMUM.5. Apply following RF signal at antenna Input.Video : Flat field , 30% modulationAudio : 3kHz ,30% modulation ,stereo (Left only)(70dB±5dB ,75ohmOPEN ,P/S 10dB)Note : After setting 30% modulation with P.L.. SWAnd N.R. SW off , turn P.L. SW and N.R. SW ON.6. Choose SEPAH in MTS adjustment of factory mode.7. Adjust “SEPAH” data (High-level separation) until the amplitude of the waveform on the oscilloscope isMINIMUM.8. Repeat step 2. to 7. Until Low-level separation and High-level separation satisfy above-mentionedconditions.The separation must be morethan 20 dB at 300Hz and3kHz..More than 18dB whenmeasures at monitorOut.25TC-26LX70L / TC-32LX70L