Panasonic CT-32SX31CE Service Manual

Also see for CT-32SX31E: Operating instructions Service manual

Panasonic CT-32SX31CE Service Manual Manual pdf 30 page image

- 30 -V-Correction Adjustment (D02)Preparation:1. Apply a Crosshatch pattern.2. Adjust (D01) so that V-Size is regular size.3. If b-a<-1.5mm (in top and bottom), increase (D02)by one step and adjust (D01) so that V-Size isregular; repeat steps until b-a≤1.5mm4. If b-a>-1.5mm (in top and bottom), decrease (D02)by one step and adjust (D01) so that V-Size isregular; repeat steps until b-a≤1.5mm.MTS Circuit AdjustmentsThe MTS Circuit Adjustments require two steps:1. Input Level Adjustment.2. Stereo Separation Adjustment.Input Level Adjustment (M00)Preparation:1. Connect an RMS meter with filter jig as shown inFig. 37.2. Connect an RF signal generator to the RFantenna input.Procedure:1. Apply the following signal from the RF signalgenerator:Video: 100 IRE flat field, 30% modulation.Audio: 300Hz, 100% modulation, monaural(70 ±5dB, 75Ω OPEN, P/S 10dB).2. Adjust the MTS Input Level Adjustment (M0) untilthe voltage measured is 106 ± 6.0mV rms.Stereo Separation Adjustment(M01 & M02)Preparation:1. Connect an RF signal generator to the RF antennainput.2. Connect oscilloscope to TPE10.Procedure:1. Select Stereo Mode in Audio menu2. Apply the following signal from the RF signalgenerator:Video: 100 IRE flat field, 30% modulation.Audio: 300Hz, 100% modulation, stereo (left only)(70 ±5dB, 75Ω OPEN, P/S 10dB).3. Adjust the MTS Low-Level Separation Adjustment(M01) until the amplitude displayed on the scopeis minimum.4. Apply the following signal from the RFsignal generator:Video: 100 IRE flat field, 30% modulation.Audio: 3KHz, 100% modulation, stereo (left only)(70 ±5dB, 75Ω OPEN, P/S 10dB).5. Adjust the MTS High-Level Separation Adjustment(M02) until the amplitude displayed on the scope isminimum.6. Repeat above steps 2 through 5 until the amplitudeis minimum for both signals.abFigure 36. V-Adjustment10k4700pTPE11RMSMETERFigure 37. Filter Jig

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