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    Grundig-Sonoclock-51-SC-5301-Service-Manual电路原理图.pdf

    • 资源ID:73211       资源大小:1.62MB        全文页数:9页
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    Grundig-Sonoclock-51-SC-5301-Service-Manual电路原理图.pdf

    Sonoclock 51 SC 5301Service DocumentExchange SetEs gelten die Vorschriften und Sicherheitshinweisegemäß dem Service Manual “Sicherheit“, Material-nummer 720108000000, sowie zusätzlich die even-tuell abweichenden, landesspezifischen Vorschrif-ten!The regulations and safety instructions shall bevalid as provided by the “Safety“ Service Manual,part number 720108000000, as well as therespective national deviations.SDieses Service Dokument ist nur in Datenform verfügbarThis Service Document is only available as dataÄnderungen vorbehalten/Subject to alterationMade by GRUNDIG in Germany H-S43 0303http:/www.grundig.comSServiceManualSicherheitSafetyMaterialnr./Part No.720108000000IK501Sonoclock 51 SC 5301IK501Sonoclock 51 SC 5301IK501Sonoclock 51 SC 5301IK501Sonoclock 51 SC 5301IK501Sonoclock 51 SC 5301IK501Sonoclock 51 SC 5301IK501Sonoclock 51 SC 5301IK501EQUIPMENT REQUIREDSignal Source1.MW/LW signal generator (AM SG)2. FM signal generator (FM SG)3. Sweep generator (10.7 Mhz for FM)Output Indicator1. SSVM2. Oscilloscope3. Frequency CounterGeneral preparation1. Check source voltage.2. Set function switch to band being aligned3. Turn volume control to minimum (unless noted otherwise)4. Connect low side of signal and output indicator to chassis ground unless otherwise specified.Keep ground connection close to high side connection.5. Keep signal inout as low as possible to avoid AGC and AFC action(set output indicator to high sensitivity.)6. Standard modulation is 1000 Hz AT 30% amplitude for MW/LW (1000 Hz at 22.5 kHz deviation for FM)AM IF ALIGNMENT StepSignal source (AM RF Gen) Connect to Set signal toAligment indicator connect to Oscilloscope or SSVMSet radio dial to Adjust Adjust for Remarks1 A standard radiation loop460 KHz T4 Detector Output TerminalQuiet point T3 MaximumVolume control min position2 Repeat for maximum outputMW RF ALIGNMENT Signal source (AM Signal Gen.) connect to Set signal to Alignment indicator Connect toSet radio dial to Adjust Adjust for Remarks1515 KHz (modulated)515 KHz (lowest end)T1 (Osc, coil)21640 KHz (modulated)1640 KHz (Highest end)TC4 (Osc, trim)3600 KHz (modulated)600 KHz L2 (ant coil)41440 KHz (modulated)1440KHz TC3 (ant trim)5 Repeat Steps 3 and 4 as necessary to minimize tracking error. Also repeat steps 1 and 2 if necessary.LW RF ALIGNMENT Signal source (AM Signal Gen.) connecttoSet signal to Alignment indicator Connect toSet radio dial to Adjust Adjust for Remarks1140 KHz (modulated)140 KHz (lowestend)T2 (Osc, coil)2290 KHz (modulated)290 KHz (Highest end)TC6 (Osc, trim)3153 KHz (modulated)153 KHz L3(ant coil)4261 KHz (modulated)261 KHz TC5 (ant trim)5 Repeat Steps 3 and 4 as necessary to minimize tracking error. Also repeat steps 1 and 2 if necessary.FM RF ALIGNMENT StepSignal source (FM Signal Gen.) ConnecttoSet signal toAlignment indicator (oscilloscope , VTVMConnecttoSet radio dial to Adjust Adjust for Remarks187.35 MHz modulated87.35MHz (lowestend)L1 (Osc, coil)2108.25 MHz modulated108.25MHz (Highestend)TC2 (Osc,trimmer)390 MHz modulated90MHzL2 (RF coil) stretch or squeeze4106 MHz modulated106MHz TC1 (RF trim)5 repeat steps 3 and 4 as necessary to minimum tracking error. Also repeat steps 1 and 2 if necessary.* UK models must not be able to tune below 87.5 MHz.Across speaker voice coil MaximumVolume control max- positionTP 1, GND (Test point) through matching network if necessaryAcross speaker voice coil MaximumVolume control Max- positionA standard radiation loop antennaALIGNMENT PROCEDUREMODEL NO. GRUNDIG SONOCLOCK SC 51A standard radiation loop antenna Across speaker voice coil MaximumVolume control max- positionSonoclock 51 SC 5301IK501183310286133214233711229122715267245 25 2120 361 4 23517318334162930

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