Sanyo Vizon DP32746 Service Manual

Also see for DP32746: Owner's manual Connection guide

Sanyo Vizon DP32746 Service Manual Manual pdf 5 page image

— 5 —SERVICE ADJUSTMENTS (Continued)MULTI-SOUND SECTION ADJUSTMENTSNote: Multi-Sound Section must be adjusted afterA101 (U/V Tuner), IC3401 (MTS Decoder), DigitalModule or IC802 (EEPROM) is replaced.INPUT LEVEL ADJUSTMENT1. Connect a signal to the analog antenna terminal withaudio of 1 KH Z 100% modulation.2. Turn off the receiver and disconnect the AC power cord(AC 120V line).3. Connect voltmeter (RMS) to TP317 and ground on theMain PC board.4. While pressing the VOLUME – key, reconnect the ACpower cord. The Service Menu will now appear.5. Select NO. 080 (ATT: MTS Input Level) with the or key.6. Adjust the + or – key for a voltmeter reading of 400 ±20 mVrms at TP317.Minimize L leakageMinimize R leakage4KHz300HzTP317 (R)TP318 (L)Figure 2. Separation AdjustmentsSEPARATION ADJUSTMENT7. Turn off the receiver and disconnect the AC power cord(AC 120V line).8. Connect oscilloscope CH1 to TP317 and CH2 to TP318and ground.9. Connect an MTS TV/Stereo generator to antenna terminal.10. While pressing the VOLUME – key, reconnect the ACpower cord. The Service Menu will now appear.11. Select pilot, 300Hz audio frequency and Left modulatingsignal.12. Select NO. 082 (WDB: Wide Band) with the or key.13. Adjust the + or – key for minimum low frequencies atTP317. See Figure 2.14. Select 4 KHz audio frequency and Right modulating signal.15. Select NO.0 81 (SPC: Spectral) with the or key.16. Adjust the + or – key for minimum high frequencies atTP318. See Figure 2.Repeat adjustments (steps 11–16) until no further decreasesin amplitude can be obtained. Press the MENU key to turnoff the Service Menu display.