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GRUNDIG RR770 CD
Service Manual


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  • Contains Circuit Diagrams
  • Download
  • PDF Format
  • Complete manual
  • Language: English, German
Price: $4.99

Description of GRUNDIG RR770 CD Service Manual

Complete service manual in digital format (PDF File). Service manuals usually contains circuit diagrams, printed circuit boards, repair tips, wiring diagrams, block diagrams and parts list. Service Manual ( sometimes called Repair Manual ) is used mainly by technicians.

If You just want to know how to use Your tv, video, mp3 player etc. You should look for Owner's Manual. After placing order we'll send You download instructions on Your email address.

The manual is available in languages: English, German

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Text excerpt from page 14 (click to view)
Abgleichvorschriften / Adjustment Procedures

RR 740 CD / RR 770 CD

3. Tuner
Messgeräte: Messsender, Wobbelsender, Oszilloskop, Digitalvoltmeter. Funktionsschalter: Radio Abgleich 1. AM-ZF Vorbereitung Wobbelsender 450kHz über Rahmenantenne in L503 (Ferritantenne) einkoppeln. Oszilloskop an Messpunkt TP 5 (IC502 Pin 18). Bandschalter: MW MW, 1620kHz Digitalvoltmeter an Messpunkt Bandschalter: MW Abgleichvorgang Mit T502 auf Maximum einstellen.

2. MW-Oszillator

Mit L505 bei 1620kHz auf 8,2V ± 0,1V einstellen.
TP 6

(CN501 Pin 9).

3. MW-Vorkreis

MW 612kHz, MW 1404kHz Messsendersignal über Rahmenantenne in L503 (Ferritantenne) (fmod = 1kHz, m = 30%, Ua nur so groß, dass das Signal gerade erkennbar ist). Oszilloskop an Kopfhörerbuchse. Bandschalter: MW LW, 281kHz Digitalvoltmeter an Messpunkt Bandschalter: LW

Bei 612kHz mit L503 (MW-Antennenspule) auf Maximum einstellen (verschieben). Bei 1404kHz mit TC502 auf Maximum einstellen. Abgleich wechselseitig wiederholen.

4. LW-Oszillator

Mit L506 bei 281kHz auf 7,9V ± 0,1V einstellen.
TP 6

(CN501 Pin 9).

5. LW-Vorkreis

LW 164kHz, LW 272kHz Messsendersignal über Rahmenantenne in L504 (Ferritantenne) einkoppeln (fmod = 1kHz, m = 30%, Ua nur so groß, dass das Signal gerade erkennbar ist). Oszilloskop an Kopfhörerbuchse. Bandschalter: LW FM 10,7MHz Wobbelsendersignal über 10nF an Messpunkt (Masse). Oszilloskop an Messpunkt Bandschalter: FM
TP 2 TP 4

Bei 164kHz mit L504 (LW-Antennenspule) auf Maximum einstellen (verschieben). Bei 272kHz mit TC503 auf Maximum einstellen. Abgleich wechselseitig wiederholen.

6. FM-ZF

TP 1

/

Mit T501 auf Maximum und Symmetrie einstellen. Mit T503 auf Symmetrie einstellen. Abgleich wechselseitig wiederholen.

S-Kurve S Curve

(IC502 Pin 19).

7. FM-Oszillator

FM, 108MHz Digitalvoltmeter an Messpunkt Bandschalter: FM

TP 7

(CN501 Pin 8).

Mit L502 bei 108MHz auf 7,9V ± 0,1V einstellen (verbiegen).

8. FM-Vorkreis

FM 90MHz, FM 106MHz Messsendersignal über 10nF an Messpunkt TP 1 / TP 2 (Masse), (fmod = 1kHz, ∆f = 22,5kHz, Ua nur so groß, daß das Signal gerade erkennbar ist). Oszilloskop an Kopfhörerbuchse. Bandschalter: FM

Bei 90MHz mit L501 auf Maximum einstellen (verbiegen). Bei 106MHz mit TC501 auf Maximum einstellen. Abgleich wechselseitig wiederholen.

62 

Tuner-Platte

62 62 !

62 #

62 $ 62 %

' &

62 "

2-2

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