Grundig_Concert-boy_240_sch.pdf

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1、Concert Boy 240 Service Document Exchange Set Es gelten die Vorschriften und Sicherheitshinweise gem dem Service Manual Sicherheit, Material- nummer 72010 800 0000, sowie zustzlich die eventuell abweichenden, landesspezifischen Vor- schriften! The regulations and safety instructions shall be valid a

2、s provided by the Safety Service Manual, part number 72010 800 0000, 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 E-BS-SA18

3、 1101 S Service Manual Sicherheit Safety Materialnr./Part No. 72010 800 0000 ? Concert Boy 240? 72011-049.37 SWITCHES SW201 = ON / OFF SW202 A-D = LW SW203 A-D = MW SW204 A-D = SW1 SW205 A-D = SW2 SW206 A-D = FM SW207 A-D = FM PRESET IC101 LM820 (KA2201) Concert Boy 240? (COPPER SIDE) LW ON / Off FM

4、 Preset FMSW2SW1MW FM A B C D A B C D A B C D A B C D A B C D A B C D Concert Boy 240? Concert Boy 240? ALIGNMENT AM IF MW RF LW RF SW 1 RF SW 2 RF FM IF FM RF IF Oscillator Aerial band pass Oscillator Aerial band pass Oscillator Aerial band pass Oscillator Aerial band pass IF Oscillator Aerial band

5、 pass INPUT SIGNAL SOURCE Sweep/Signal Generator via a standard radiation loop ant. to via a standard radiation loop ant. to via a standard radiation loop ant. to via 10pF to Testpoint TP201 GND to TP202 via 10pF to Testpoint TP201 GND to TP202 to Testpoint TP203 GND to TP202 to Testpoint TP201 GND

6、to TP202 SIGNAL (mod.) 460kHz 526.5kHz 1606.5kHz 558kHz 1440kHz 148.5kHz 283.5kHz 153kHz 261kHz 5.8MHz 6.4MHz 5.9MHz 6.3MHz 6.8MHz 18.5MHz 7.0MHz 16.0MHz 10.7MHz 87.35MHz 108.25MHz 88MHz 106MHz OUTPUT Oscilloscope to TP205 GND TP206 Speaker Speaker Speaker Speaker to TP 204 GND TP206 Speaker SET RAD

7、IO DIAL TO Quit point Lowest end Highest end 558kHz 1440kHz Lowest end Highest end 153kHz 261kHz Lowest end Highest end 5.9MHz 6.3MHz Lowest end Highest end 7.0MHz 16.0MHz Quit point Lowest end Highest end 88MHz 106MHz ADJUST T205 L210 VCT1D L206 VCT1C L209 TC204 L205 TC201 L211 TC205 L207 TC202 L21

8、2 TC206 L208 TC203 T201 T202 VR201 L204 L202 TC207 ADJUST FOR Maximum Maximum Maximum Maximum Maximum Max. & Symm. Maximum REMARK Repeat this adjustment Repeat this adjustment Repeat this adjustment Repeat this adjustment Repeat this adjustment Repeat this adjustment A A A L206L205 A L209 L202 L204

9、T201 TC 206 L212 T202 T205 TC202 L207 L208 TC203 TC205 L211 L210 TC201TC204 VCT1C VCT1D D201 TP206 (GND) LWSW2SW1MWFM TP201TP202 (GND) ALIGNMENT PROCEDURE Instruments Required 1. Signal Generator 2. FM Signal Generator 3. AM/FM IF Sweep Generator (10.7MHz for FM) 4. VTVM 5. Oscilloscope 6. Regulated

10、 DC power supply General Preparation 1. Check source voltage, DC or AC according to specifications 2. Set function switch to band being aligned 3. Signal input should be kept as low as possible to avoid AGC and AFC function 4. Standard modulation: AM 1kHz 30% mod., FM 1kHz 22.5kHz dev. R217 TP205 R213 TP204TP203 Q202 B EC SO201 FM PRES. TC207 VR201