Grundig Musik Boy 50L RP 5240 LW Technical manual

Musik Boy 50L RP 5240 LW
Service Document
Exchange Set
Es gelten die Vorschriften und Sicherheitshinweise
gemäßdemServiceManual"Sicherheit",Material-
nummer720108000000,sowiezusätzlichdieeven-
tuell abweichenden, landesspezifischen Vorschrif-
ten!
The regulations and safety instructions shall be
valid 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 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
S
Service
Manual
Sicherheit
Safety
Materialnr./Part No.
720108000000
ǵ

Musik Boy 50L RP 5240 LW
ǵ
NOTE : USING 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 RP5240LW
INSTRUMENTS REQUIRED GENERAL PREPARATION
1. Signal Generator 1. Che k sour e voltage, DC or AC a ording to spe ifi aions
2. FM Signal Generator 2. Set fun tion swit h to band being aligned
3. FM/AM IF Sweep Generator (10.7 MHz for FM) 3. Signal input should be kept as low as possible to avoid AGC and AFC fun tion
4. VTVM 4. Standard modulation : AM 1 KHz 30% mod
5. Os illos ope FM 1 KHz 22.5 KHz dev
6. Frequen y ounter
7. Regulated DC power supply
AM IF ALIGNMENT
STEP
SIGNAL SOURCE (AM RF Gen.) CONNECT
TO
SET SIGNAL TO ALIGNMENT INDICATOR (Oscilloscope, VTVM) CONNECT TO
SET RADIO DIAL
TO
AD UST AD UST FOR REMARKS
TP 4 Volume ontrol at
1 A standard radiation
460KHz
Dete tor output terminal Quiet Maximum min. position
loop and TP 2 ground Point T 2
2 Repeat step 1 for max. output
FM IF ALIGNMENT
This model requires no FM IF alignment as the IF is fixed by erami filter and dis riminator CF 1 & CF 2. Please take note that orre t type and same olor dot of erami filter is used
in servi ing, diff olor dot of erami filter may ause worse IF 'S' urve hara teristi and distortion.
Conne t IF genes ope output terminal to TP 3 & TP 2 (GND) in series with a 100 Pf apa itor, onne t s ope input terminal to TP 4 & TP 2 (GND), then the IF hara teristi urve an be
observed.

Musik Boy 50L RP 5240 LW
ǵ
A L I G N M E N T P R O C E D U R E
MODEL NO.: GRUNDIG RP5240LW
SIGNAL SOURCE (FM Signal Gen.) CONNECT TO SET SIGNAL TO ALIGNMENT INDICATOR (Oscilloscope, VTVM) CONNECT TO
SET RADIO DIAL
TO
AD UST AD UST FOR REMARKS
L 4
87.35 MHz (Lowest end) stret h or
(modulated) squeeze
TP 1 108.25 MHz Terminals VC1 B Volume
through mat hing network (modulated) a ross speaker (Highest end) (Os . trimmer) Maximum ontrol at
if ne essary voi e oil L 3 (RF oil) max. position
88 MHz 88 MHz stret h or
(modulated) squeeze
106 MHz VC1 C
(modulated) 106 MHz (RF trimmer)
Repeat steps 3 and 4 as ne essary to minimize tra king error and also steps 1 and 2 if ne essary
ALIGNMENT
SIGNAL SOURCE (AM Signal Gen.) CONNECT TO SET SIGNAL TO ALIGNMENT INDICATOR (Oscilloscope, VTVM) CONNECT TO
SET RADIO DIAL
TO
AD UST AD UST FOR REMARKS
515 KHz L 5
(modulated) (Lowest end) (Os . oil)
1640 KHz VC1 A Volume
A standard radiation (modulated) A ross speaker (Highest end) (Os . trimmer) Maximum ontrol at
loop ant. 558 KHz voi e oil L 2 max. position
(modulated) 558 KHz (ant. oil)
1440 KHz VC1 D
(modulated) 1440 KHz (ant. trimmer)
Repeat steps 3 and 4 as ne essary to minimize tra king error and also steps 1 and 2 if ne essary
ALIGNMENT
SIGNAL SOURCE (LW Signal Gen.) CONNECT TO SET SIGNAL TO ALIGNMENT INDICATOR (Oscilloscope, VTVM) CONNECT TO
SET RADIO DIAL
TO
AD UST AD UST FOR REMARKS
142 KHZ
(modulated) (Lowest end) NA
292 KHz Terminals TC 3 Volume
A standard radiation (modulated) a ross speaker (Highest end) (Os . trimmer) Maximum ontrol at
loop ant. 153 KHz voi e oil L 6 max. position
(modulated) 153 KHz (ant. oil)
261 KHz TC 4
(modulated) 261 KHz (ant. trimmer)
Repeat steps 3 and 4 as ne essary to minimize tra king error and also steps 1 and 2 if ne essary

Musik Boy 50L RP 5240 LW
ǵ

Musik Boy 50L RP 5240 LW
ǵ