Sanyo DS32424 Service Manual

Also see for DS32424: Owner's manual

Contents

MULTI-SOUND SECTION ADJUSTMENTSNote: Multi-Sound Section must be adjusted afterA101 (U/V Tuner), IC3401 (MTS Decoder), or IC802(EEPROM) is replaced.INPUT LEVEL ADJUSTMENT1. Connect a signal to the antenna terminals with audio of1 KHZ 100% modulation.2. Turn off the receiver and disconnect the AC power cord(AC 120V line).3. Connect voltmeter (RMS) to TP317 and ground.4. While pressing the Menu key, reconnect the AC powercord. The Service Menu will now appear.5. Select NO. 80 ATT (MTS Input Level) with the or key.6. Adjust the + or – key for a voltmeter reading of 400 ± 20mVrms at TP317.SEPARATION 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 Menu key, reconnect the AC powercord. The Service Menu will now appear.11. Select pilot, 300Hz audio frequency and Left modulatingsignal.12. Select NO. 81 WDB (Wide Band) with the or key.13. Adjust the + or – key for minimum low frequencies atTP317. See Figure 9.14. Select 4 KHz audio frequency and Right modulating signal.15. Select NO. 82 SPC (Spectral) with the or key.16. Adjust the + or – key for minimum high frequencies atTP318. See Figure 9.Repeat adjustments (steps 11–16) until no further decreasesin amplitude can be obtained. Press the MENU key to turnoff the Service Menu display.PURITY AND CONVERGENCE ADJUSTMENTSPurity and Convergence have been aligned at the factory.No re-alignment is necessary.— 10 —SERVICE ADJUSTMENTS (Continued)Minimize L leakageMinimize R leakage4KHz300HzTP317 (R)TP318 (L)Figure 9. Separation AdjustmentsPINCUSHION CORRECTION ADJUSTMENT1. Connect a color-bar generator to the antenna terminalsand select a crosshatch pattern.2. Set the picture controls to the Sports level.3. Turn off the receiver and disconnect the AC power cord(AC 120V line).4. While pressing the Menu key, reconnect the AC powercord. The Service Menu will now appear.5. Select No. 62 EWT with or key and adjust with + or –key for equal tilt at top and bottom.6. Select No. 61 EWA with or key and adjust with + or –key for straight vertical lines at the center.7. Select No. 63 EWB4EWP with or key and adjust with +or – key for straight vertical lines at the top.8. Select No. 63 EWB4EWP with or key and adjust with4 ~ 7 keys for straight vertical lines at the bottom.9. Repeat steps 5 through 8 for best pincushion adjustment.10. Press the MENU key to turn off the Service Menu display.Figure 9.Figure 7.Figure 8.Adjust No. 62 EWT for equal tilt:Ta=Tb, Tc=Td.Ta TcTb TdAdjust No. 61 EWA for the centerpart of the vertical line to be straight.Adjust No. 63 EWP for straight verticallines at the top. (+ or – keys)Adjust No. 63 EWB for straight verticallines at the bottom. (4 ~ 7 keys)EWPEWB