GrundigSonoclock51SC5301 维修电路图、原理图.pdf

《GrundigSonoclock51SC5301 维修电路图、原理图.pdf》由会员分享，可在线阅读，更多相关《GrundigSonoclock51SC5301 维修电路图、原理图.pdf（9页珍藏版）》请在收音机爱好者资料库上搜索。

1、Sonoclock 51 SC 5301 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、0303 S Service Manual Sicherheit Safety Materialnr./Part No. 720108000000 ? Sonoclock 51 SC 5301? Sonoclock 51 SC 5301? Sonoclock 51 SC 5301? Sonoclock 51 SC 5301? Sonoclock 51 SC 5301? Sonoclock 51 SC 5301? Sonoclock 51 SC 5301? EQUIPMENT REQUIRED Signal Source 1.MW/LW signal generator (AM SG) 2. F

4、M signal generator (FM SG) 3. Sweep generator (10.7 Mhz for FM) Output Indicator 1. SSVM 2. Oscilloscope 3. Frequency Counter General preparation 1. Check source voltage. 2. Set function switch to band being aligned 3. Turn volume control to minimum (unless noted otherwise) 4. Connect low side of si

5、gnal 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 (

6、1000 Hz at 22.5 kHz deviation for FM) AM IF ALIGNMENT Step Signal source (AM RF Gen) Connect to Set signal to Aligment indicator connect to Oscilloscope or SSVM Set radio dial to AdjustAdjust for Remarks 1A standard radiation loop460 KHzT4 Detector Output TerminalQuiet pointT3Maximum Volume control

7、min position 2Repeat for maximum output MW RF ALIGNMENT Signal source (AM Signal Gen.) connect to Set signal to Alignment indicator Connect toSet radio dial to Adjust Adjust forRemarks 1 515 KHz (modulated) 515 KHz (lowest end) T1 (Osc, coil) 2 1640 KHz (modulated) 1640 KHz (Highest end) TC4 (Osc, t

8、rim) 3 600 KHz (modulated) 600 KHzL2 (ant coil) 4 1440 KHz (modulated) 1440KHzTC3 (ant trim) 5Repeat 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.) connect to Set signal to Alignment indicator Connect toSe

9、t radio dial to Adjust Adjust forRemarks 1 140 KHz (modulated) 140 KHz (lowest end) T2 (Osc, coil) 2 290 KHz (modulated) 290 KHz (Highest end) TC6 (Osc, trim) 3 153 KHz (modulated) 153 KHzL3(ant coil) 4 261 KHz (modulated) 261 KHzTC5 (ant trim) 5Repeat Steps 3 and 4 as necessary to minimize tracking

10、 error. Also repeat steps 1 and 2 if necessary. FM RF ALIGNMENT Step Signal source (FM Signal Gen.) Connect to Set signal to Alignment indicator (oscilloscope , VTVM Connect to Set radio dial to AdjustAdjust for Remarks 1 87.35 MHz modulated 87.35MHz (lowest end) L1 (Osc, coil) 2 108.25 MHz modulate

11、d 108.25MHz (Highest end) TC2 (Osc, trimmer) 3 90 MHz modulated 90MHz L2 (RF coil) stretch or squeeze 4 106 MHz modulated 106MHzTC1 (RF trim) 5repeat 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. Acr

12、oss speaker voice coilMaximum Volume control max- position TP 1, GND (Test point) through matching network if necessary Across speaker voice coilMaximum Volume control Max- position A standard radiation loop antenna ALIGNMENT PROCEDURE MODEL NO. GRUNDIG SONOCLOCK SC 51 A standard radiation loop antennaAcross speaker voice coilMaximum Volume control max- position Sonoclock 51 SC 5301? 18 33 10 28 6 13 32 14 23 37 11 22 9 12 27 15 26 7 24525212036142 35 17 31 8 3 34 16 29 30