GrundigMusikBoy40RP4200 维修电路图、原理图.pdf

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1、Musik Boy 40 RP 4200 Service Document Exchange Set Es gelten die Vorschriften und Sicherheitshinweise gem dem Service Manual Sicherheit, Material- nummer 720108000000, sowie zustzlich die even- tuell abweichenden, landesspezifischen Vorschrif- ten! The regulations and safety instructions shall be va

2、lid as provided by the Safety Service Manual, part number 720108000000, as well as the respective national deviations. S Dieses Service Dokument ist nur in Datenform verfgbar This Service Document is only available as data nderungen vorbehalten/Subject to alteration Made by GRUNDIG in Germany H-S43

3、0802 S Service Manual Sicherheit Safety Materialnr./Part No. 720108000000 ? Musik Boy 40 RP 4200? SING SONY IC CXA1191 WITHOUT FM IFT A L I G N M E N T P R O C E D U R E MODEL NO.: GRUNDIG RP4200 MENTS REQUIREDGENERAL PREPARATION Generator1. Check source voltage, DC or AC according to specificaions

4、gnal Generator2. Set function switch to band being aligned M IF Sweep Generator (10.7 MHz for FM)3. Signal input should be kept as low as possible to avoid AGC and AFC function 4. Standard modulation : AM 1 KHz 30% mod scopeFM 1 KHz 22.5 KHz dev ency counter ated DC power supply ALIGNMENT SIGNAL SOU

5、RCE (AM RF Gen.) CONNECT TO SET SIGNAL TOALIGNMENT INDICATOR (Oscilloscope, VTVM) CONNECT TO SET RADIO DIAL TO ADJUSTADJUST FORREMARKS TP 4 A standard radiation460KHz Detector output terminalQuietVolume control at loop and groundPointT 2Maximummin. position Repeat step 1 for max. output ALIGNMENT el

6、 requires no FM IF alignment as the IF is fixed by ceramic filter and discriminator CF 1 & CF 2. Please take note that correct type and same color dot of ceramic filter is used ng, diff color dot of ceramic filter may cause worse IF S curve characteristic and distortion. F genescope output terminal

7、to TP 3 & TP 2 (GND) in series with a 100 Pf capacitor, connect scope input terminal to TP 4 & TP 2 (GND), then the IF characteristic curve can be Musik Boy 40 RP 4200? A L I G N M E N T P R O C E D U R E MODEL NO.: GRUNDIG RP4200 FM RF ALIGNMENT STEPSIGNAL SOURCE (FM Signal Gen.) CONNECT TOSET SIGN

8、AL TO ALIGNMENT INDICATOR (Oscilloscope, VTVM) CONNECT TO SET RADIO DIAL TO ADJUSTADJUST FORREMARKS L 4 187.35 MHz(Lowest end)stretch or (modulated)squeeze TP 1108.25 MHzTerminalsVC1 BVolume 2through matching network(modulated)across speaker (Highest end)(Osc. trimmer)Maximumcontrol at if necessaryv

9、oice coilL 3 (RF coil)max. position 388 MHz88 MHzstretch or (modulated)squeeze 106 MHzVC1 C 4(modulated)106 MHz (RF trimmer) 5 Repeat steps 3 and 4 as necessary to minimize tracking error and also steps 1 and 2 if necessary AM RF ALIGNMENT STEPSIGNAL SOURCE (AM Signal Gen.) CONNECT TOSET SIGNAL TO A

10、LIGNMENT INDICATOR (Oscilloscope, VTVM) CONNECT TO SET RADIO DIAL TO ADJUSTADJUST FORREMARKS 515 KHzL 5 1(modulated)(Lowest end)(Osc. coil) 1640 KHzVC1 AVolume 2A standard radiation(modulated)Across speaker(Highest end)(Osc. trimmer)Maximumcontrol at loop ant.600 KHzvoice coilL 2max. position 3(modu

11、lated)558 KHz(ant. coil) 1440 KHzVC1 D 4(modulated)1440 KHz(ant. trimmer) 5 Repeat steps 3 and 4 as necessary to minimize tracking error and also steps 1 and 2 if necessary SW RF ALIGNMENT STEPSIGNAL SOURCE (LW Signal Gen.) CONNECT TOSET SIGNAL TO ALIGNMENT INDICATOR (Oscilloscope, VTVM) CONNECT TO

12、SET RADIO DIAL TO ADJUSTADJUST FORREMARKS 5.85 KHzL 7 1(modulated)(Lowest end)(Osc. Coil) TP118.5 KHzTerminalsTC 2Volume 2through matching natwork(modulated)across speaker(Highest end)(Osc. trimmer)Maximumcontrol at if necessary6 KHzvoice coilL 6max. position 3(modulated)6 KHz(ant. coil) 16 KHzTC 1

13、4(modulated)16 KHz(ant. trimmer) 5SW band tracking needs precise alignment to achieve best possible sensitivity. So repeat steps 3 and 4 at least 2 times, if necessary also repeat steps 1 and 2 Musik Boy 40 RP 4200? Musik Boy 40 RP 4200? Musik Boy 40 RP 4200? Musik Boy 40 RP 4200? Musik Boy 40 RP 4200?