rotel_rx-803_sm维修电器原理图

TManaAM/FM STEREO RECEIVERRX-803TABLE OF CONTENTSChassis Layout(Top View)··················.2Troubleshooting Guide.·,············..14Chassis Layout(Bottom View})..:.:,·:··:..,,,,,,3Repair Parts List,,,,,···········.15Overload Protection Level Adjustment Procedure··.···:.4Front End Schematic Diagram,.,,,···.16Power Amp Bias Adjustment Procedure..............5Dial Stringing Diagram,.··········.16AM Alignment Procedure......................6Schematic Diagram...............17AM Signal Meter Calibration.....................8Power Supply Circuit Board Diagram.·.··.21FM IF and RF Alignment Procedure.,,·....,,··,,.9Tape Monitor Switches Circuit Board Diagram......21FM Signal Meter Calibration.,·,,····,·········10Main Amplifier Circuit Board Diagram............21FM MPX Alignment Procedure,·,,,········1,Switches Circuit Board Diagram ...21FM Muting Level Check .......13IF/MPX Amp and Pre-amplifier Circuit Board Diagram.....23Gain Diagram..·····..13INHALTSVERZEICHNISChassis-Anordnung (Oberansicht)..................2Leitfaden zur Storungssuche......,.,,,,,,·,···14Chassis-Anordnung (Unteransicht).................3Reparaturteilliste。....。.。..。。,。··,,,,,,,··15Uberlastungsschutzpegel-Einstellung................4Eingangsstufe-Schaltungsschema.···,,,,。,,,,,,16Endverstarker--Vorspannungs--Einstellung,.,,,,·.,··."6Skalenantriebsschema,,,··············,16AM-Abgleich.....-Schaltungsschema.,,,···········,17Eichung des MW-Feldstarke-MeBinstruments ..........8Schaltbild des Netzteils.......21UKW-ZF.und HF-Einstellung....................9Schaltbild der Bandmonitorschalter........21UKW-Signalanzeige-Eichung....................10Schaltbild des Hauptverstarkers...........21UKW-MPX-Einstellung.,,,...············11Schalterverdrahtung.。·····,·····,21Uberpufung des UKW-Stillabstimmpegels ..........3Schaltbild des ZF/MPX-Verstarkers und Vorverstarkers....23Verstarkungsdiagramm,,,,,,,····13TABLE DES MATIERESInstallation du chassis (vue de dessus).............2Diagramme de gain.,,.,.....。............,13Installation du chassis(vue de dessous).·...····.·....3Guide de depannage,,,,····:·········,·,,,14Procedure de reglage du niveau de protectionListe des pieces de rechange.........。.,。,···.15contre la surcharge........................4Diagramme schematique de I'etage d'entree........,16Procedure de reglage de la polarisationDiagramme des cables d'entrainement.....16de I'amplificateur de puissance.5Diagramme schematique..........,17Procedure d'alignement AM...··.············.7Diagramme de plaquette d'alimentation ..21Etalonnage du S-metre AM........8Diagramme de plaquette des commutateursProcedure d'alignement FM IF et HF.·,.··...·......9de controle d'ecoute.....,,,,,,21Etalonnage du S-metre FM..···,.·,·,,.,.,,,·.·11Diagramme de plaquette de l'amplificateur principal......21Procedure d'alignement FM MPX..··,············12Diagramme de plaquette des commutateurs...........21Verification du niveau de sourdine FM.,.,········3Diagramme de plaquette d'ampli et pre-ampli IF/MPX.....23