Service Document
Exchange Set
Musik Boy 50 RP 5200
Service |
Es gelten die Vorschriften und Sicherheitshinweise |
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S gemäß dem Service Manual "Sicherheit", Material- |
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Manual |
nummer 720108000000, sowie zusätzlich die even- |
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Sicherheit |
tuell abweichenden, landesspezifischen Vorschrif- |
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ten! |
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Safety |
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The regulations and safety instructions shall be |
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Materialnr./Part No. |
S valid as provided by the "Safety" Service Manual, |
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720108000000 |
part number 720108000000, as well as the |
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respective national deviations. |
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Dieses Service Dokument ist nur in Datenform verfügbar This Service Document is only available as data
Änderungen vorbehalten/Subject to alteration
Made by GRUNDIG in Germany • H-S43 0802 http://www.grundig.com
ING SONY IC CXA1191 WITHOUT FM IFT |
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A L I G N M E N T |
P R O C E D U R E |
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MODEL NO.: GRUNDIG RP5200 |
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ENTS REQUIRED |
GENERAL PREPARATION |
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Generator |
1. |
Check source voltage, DC or AC according to specificaions |
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gnal Generator |
2. |
Set function switch to band being aligned |
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IF Sweep Generator (10.7 MHz for FM) |
3. |
Signal input should be kept as low as possible to avoid AGC and AFC function |
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4. |
Standard modulation : |
AM 1 KHz 30% mod |
scope |
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FM 1 KHz 22.5 KHz dev |
ency counter |
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ated DC power supply |
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ALIGNMENT
SIGNAL SOURCE (AM RF Gen.) CONNECT
TO
A standard radiation loop
Repeat step 1 for max. output
SET SIGNAL TO
460KHz
ALIGNMENT |
INDICATOR |
(Oscilloscope, |
VTVM) CONNECT TO |
SET |
RADIO DIAL |
ADJUST |
ADJUST FOR |
REMARKS |
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TO |
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TP 4 |
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Detector output terminal |
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Quiet |
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Volume control at |
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and ground |
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Point |
T 2 |
Maximum |
min. position |
ALIGNMENT
el 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 g, diff color dot of ceramic filter may cause worse IF 'S' curve characteristic and distortion.
F genescope output terminal 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 50 RP 5200
NOTE :
A L I G N M E N T |
P R O C E D U R E |
MODEL NO.: GRUNDIG RP5200 |
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FM RF ALIGNMENT
STEP
1
2
3
4 5
SIGNAL SOURCE (FM Signal Gen.) CONNECT TO |
SET SIGNAL TO |
ALIGNMENT |
INDICATOR (Oscilloscope, VTVM) CONNECT |
SET RADIO DIAL |
ADJUST |
ADJUST FOR |
REMARKS |
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TO |
TO |
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L 4 |
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87.35 MHz |
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(Lowest |
end) |
stretch or |
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(modulated) |
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squeeze |
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TP 1 |
108.25 MHz |
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Terminals |
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VC1 B |
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Volume |
through matching network |
(modulated) |
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across speaker |
(Highest |
end) |
(Osc. trimmer) |
Maximum |
control at |
if necessary |
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voice coil |
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L 3 (RF coil) |
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max. position |
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88 MHz |
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88 MHz |
stretch or |
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(modulated) |
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squeeze |
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106 MHz |
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VC1 C |
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(modulated) |
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106 MHz |
(RF trimmer) |
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Repeat steps 3 and 4 as necessary to minimize tracking error and also steps 1 and 2 if necessary |
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AM RF ALIGNMENT
STEP
1
2
3
4 5
SIGNAL SOURCE (AM Signal Gen.) CONNECT TO |
SET SIGNAL TO |
ALIGNMENT |
INDICATOR (Oscilloscope, VTVM) CONNECT |
SET RADIO DIAL |
ADJUST |
ADJUST FOR |
REMARKS |
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TO |
TO |
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515 KHz |
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L 5 |
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(modulated) |
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(Lowest end) |
(Osc. coil) |
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1640 KHz |
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VC1 A |
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Volume |
A standard radiation |
(modulated) |
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Across speaker |
(Highest end) |
(Osc. trimmer) |
Maximum |
control at |
loop ant. |
600 KHz |
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voice coil |
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L 2 |
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max. position |
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(modulated) |
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558 KHz |
(ant. coil) |
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1440 KHz |
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VC1 D |
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(modulated) |
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1440 KHz |
(ant. trimmer) |
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Repeat steps 3 and 4 as necessary to minimize tracking error and also steps 1 and 2 if necessary |
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SW RF ALIGNMENT |
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STEP |
SIGNAL SOURCE (LW Signal Gen.) CONNECT TO |
SET SIGNAL TO |
ALIGNMENT |
INDICATOR (Oscilloscope, VTVM) CONNECT |
SET RADIO DIAL |
ADJUST |
ADJUST FOR |
REMARKS |
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TO |
TO |
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5.85 KHz |
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L 7 |
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1 |
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(modulated) |
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(Lowest end) |
(Osc. Coil) |
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TP1 |
18.5 KHz |
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Terminals |
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TC 2 |
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Volume |
2 |
through matching natwork |
(modulated) |
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across speaker |
(Highest end) |
(Osc. trimmer) |
Maximum |
control at |
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if necessary |
6 KHz |
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voice coil |
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L 6 |
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max. position |
3 |
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(modulated) |
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6 KHz |
(ant. coil) |
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16 KHz |
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TC 1 |
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4 |
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(modulated) |
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16 KHz |
(ant. trimmer) |
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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 50 RP 5200
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