Grundig V 304 User manual

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GRUMDIG service manu. | SSS
Service
Manual
V 304
V 304 (9.55138-8151)
GRUNDIG
Inhaltsverzeichnis Contents
Seite Page
TPechmische Daten: iiiicsicisccctsniisisicastinne etsseveassestednndnaas 2 SCI NG AU GINS oie vcc deta hteiaeencsucisveiandoie less ptautatsaintdnaiaraanaeins 2
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EFAtZtelliste V S04: scccteciccewvanssizaxcesvsasiaversecdbueteensciannsaniensions 7-8 List of Spare Parts V 304 ooo ceeeseeeeeeseeeeeecreteeeeees 7-8
Eratzteilliste RCO 2 ooo... ccccccccscceesceeecceseessessesceseenessnseeeeecenens 9 List of Spare Parts RC 2 ooo... ce ceneneseeeeeececeeennessssenees 9
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Leiterplattenabbildungen: lilustration of Printed Boards:
LUT PAS acsidesti Dsancasrcincnsesan en danotensceduacdntaenaneniiemaettiees 11-12 MAPUTO AIG eas cdes pi cal oscdecissicacashinaeicreeagacanacsonentaatoanrignenaiuaeoiiens 11-12
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INGEZOUICHSOMDIAUC: soo. veces coas aaceavcnnveitds cactenceuseoscecevutcaben ticanaseneeiees: 21 MAINS: SOCKEL BOAIG: sisal cs tectanscaseseesoxineateeeareerenetnarayeeianel iswetaan) 21
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KopfhGrerbuchsenplatte 0.0.0.0... ee ccececeecesseceeenseeeeeceseeeecseeenseeceees 21 Headphone Socket Board oo... cciccccccssessceceueeceeetseeseeaseeeesusecesees 21
Lautsprecher-AnschluB-Platte .........0...cecccccceesececceesenseeeeeesecennenees 21 Loudspeaker Clamp Board. ............cccccccsscssscceaeeeceeeasenereeeettecssencees 21
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Schaltbild: Circuit Diagram:
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Service
Manual
Sach-Nr.
72010-719.60
Subject to alteration VK 225 1091 Service Manual PartNo. 72010-719.60
rn

Technisch Daten / Specifications
Technische Daten
Ausgangsleistungen
DIN 45 500
MUSIKIGCISLUNG: AN: OD scccitenncnicinesicdh ianinieearneedodeaie. 2x130 W
Nennleistung an 8 QO ......... cee eeeeeeeeeeeee teers reteeeeneeeennnennennens 2x75 W
Klirrfaktor
Del NEMMIGISTUNG VOB xieseces ited. ce. tectiaegetitineetoeriilemedes athe < 0,01 %
Itermodulation
DOL NOMMIGISTUIMAG = VOB sais 5e5 i ora biccntateanan ts oe alceseeabeaweorsavoabuts < 0,02 %
Dampfungsfaktor
a8 saan oh alee oe ae en Pesan cto ee tate See > 50
Ubertragungsbereich
FINO saci aad ccvcibarns nan tinea eden oe cca teeeseaanan ts 20 Hz...20 kHz <+1dB
Tuner, Tape, CD, Vide@O/AUX ........cceeesertescerereeees 8 Hz...45 kHz
Ubersprechdampfung L-R
fur 1 kHz
PAAOIO:sccuccavesaelesvavteadeavawarosaoa ciate usenoiswenaaslans tesisiaauiasacieacatease > 65 dB
Tuner, Tape, CD, Vide@0/AUX .......... cece ceeeeeeeeteeeeeeeeeeees 8 Hz...45 kHz
Fremdspannungsabstand
bezogen auf Nennleistung
PINOO 1htreco eect cced Ses beree ci tetiae st cated cacetieteshcadireneenatetone IEC 75 dB
PON Oca ircct he titccutds ee cpeedtetast 2 oo Geese Den teaaoeabreaex tne stents eee DIN 70 dB
Tuner, Tape, CD, Vide0/AuXx ....... eee eeeeeeneeeenereeeees IEC 95 dB
Tuner, Tape, CD, Vide@O/AUX ........-----:-::csssseecessesvensesseseere DIN 91 dB
Gerauschspannungsabstand
Phono bezogen auf Nennleistung ..............cee eres IEC 79 dB
Phono bezogen auf 50 MW ......... cece ee eeeeeeeneeeeees IEC 70 dB
Phono bezogen auf Nennleistung ...............c cece DIN 70 dB
Phono bezogen auf 50 MW ....... eee eceseeeeeneeeeeeeeenees DIN 61 dB
Tuner, Tape, CD, Video/Aux bezogen auf Nennleistung...... IEC 98 dB
Tuner, Tape, CD, Video/Aux bezogen auf 50 mW .............. IEC 70 dB
Tuner, Tape, CD, Video/Aux bezogen auf Nennieistung ..... DIN 90 dB
Tuner, Tape, CD, Video/Aux bezogen auf 50 mW ............... DIN 62 dB
Eingangsempfindlichkeit
bei Nennleistung
POT O scss ceases css enceatttba ches nda oeaticecond eicaesees ea aacmaes tem enrcuuatuee <2,2mvV
Tuner, Tape, CD, Vid@O/AUX ........ ec ceccctcteeteeeeeeeeeeeeeeeeas < 200 mV
Max. Eingangsspannung
(Ubersteuerfestigkeit)
FON” cacemasnaeceninces sitevudexedsssadivandt corde agenus ine maaweshemidsas > 120 mV
Tuner, Tape, CD, Vide@O/AUX ..........ceeeeeeeseeeeeeseeereeeeeeesssnensenenes >10V
Regelbereich der Klangsteller ......0.... eee eeeeeeee +13dB
Loudness
TAZ shi lenosuranes dee ai eaias aaah Meteo tesa aielinee skeiote 12,5dB
UG Fed ere sions 2a coe pel ade eas soit tn ata enepcoaabianonvapnncoeieneyt 5 dB
V 304
Specifications
Output Power
DIN 45 500
WuUSIC: POWEr INIO 8: Qn ccaciekisvier Ri ati ieee .2x130 W
Nominal Power IntO: 8 02%. .ccsess ico ccosadercesacssesncaieniciantecdyeculeseecs 2x75 W
Total Harmonic Distortion
AL MOM Val BOWS = AB ict coca tvcless esa equadebin siete nevednuenas ake ne: < 0.01 %
Itermodulation Distortion
aLNOMiMadl DOWEls 1OB ect cre een enero <= 0.02 %
Damping Factor
BO sec totes cede he eiaia eialeapabetcnsduetesnu heats iwauseciniteaseas tc Gatabensasaoeuents > 50
Frequency Response
PRONG A MAGN sateasechcodiers ialpcaertiantncadansare 20 Hz...20 kHz <+1dB
Tuner, Tape, CD, Video/AUx .............eccceccececeeeeeeeeeeeeenes 8 Hz...45 kHz
Stereo Separation L-R
for 1 kHz
PROMS: (MAIR ianctkceniiicuskstrstaeee ecco anes, > 65 dB
Tuner, Tape, CD, Vid@0/AUX ............cccscceceeeeeeceeereeneneees 8 Hz...45 kHz
Unweighted Signal-to-Noise Ratio
at nominal power
PRONG (MAGN. section ie eae IEC 75 dB
PONG MAGN) re eetaent ernie vane nsstadaaidlaateaNevavenare DIN 70 dB
Tuner, Tape, CD, Vide@0/AUX ...... ec eesseeerteeeeseeeeeeeeeceererees IEC 95 dB
Tuner, Tape, CD, Vide@o/AUx ...........ccececceeccceceeeeetereeeenteneees DIN 91 dB
Weighted Signal-to-Noise Ratio
Phono (magn.) at nominal Power ..........ccccccccceeeseeeeeeeeeeees IEC 79 dB
PHONO MAGI: jab OO TV ss xideostentesvnertcerceeutearececontoharaias IEC 70 dB
Phono (magn.) at Nominal POWER? ..........cceeeeseeeeeeeeseeeeeeeees DIN 70 dB
PHONG:(MaAON.) AbSO MV sascssatacioei cteovaiatcctersrgnscens eabaeesacias DIN 61 dB
Tuner, Tape,CD, Video/Aux at nominal power ................4 EC 98 dB
Tuner, Tape,CD, Video/Aux at 50 MW .......ccecccceeeseeeeeeeeeeeees IEC 70 dB
Tuner, Tape,CD, Video/Aux at nominal power ................... DIN 90 cB
Tuner, Tape,CD, Video/Aux at 50 MW ........... eee eeeeees DIN 62 dB
Input Sensitivity
at nominal power
PHONO (IAG INA sectsdecces Mecceetdecta ea tiec weeadeediende Sumsetcua tatu < 2.2mvV
Tuner, Tape, CD, Vid@o/AUx .......... ccc ceeeeeeeeeeeeeeeeeeeeeeeeeeas < 200 mV
Maximum Input Voltage
(Input overload point)
PHONO: (MAGN scat en cotearensar Pevalvstardeendeaeneeot areuatsbegeieeres > 420 mV
Tuner, Tape, CD, ViId@O/AUX ...............:ccccsseeeseeseceesesseesnaneeonee a >10V
Tone Control Range .............ccccccccccccccceeccecesseeeaseeneeeeneseeens + 13dB
Loudness
2 LO ic | SO Cn te Re ee RC eR ee ae Tee 12.5dB
Deets areoete ast aslatoaapantasesc dea bndcernnanta cea sendveiatateceaae awinn aan eaae a es 5 dB
GRUNDIG Servie— Technik

V 304
ooo
ooo,
Prescriptions de sécurité / Prescripciones de seguridad
Achtung: Bei Eingriffen ins Gerat sind die Sicherheitsvor-
schriften nach VDE 701 (reparaturbezogen) bzw. VDE 0860
/ IEC 65 (geratebezogen) zu beachten!
Bauteile nach IEC- bzw. VDE-Richtlinien ! lm Ersatzfail nur
ATEN Teile mit gleicher Spezifikation verwenden!
MOS - Vorschriften beim Umgang mit MOS - Bauteilen
beachten! ,
Attention: Please observe the applicable safety require-
ments according to VDE 701 (concerning repairs) and VDE
0860 / IEC 65 (concerning type of product)!
/\AN Components to IEC or VDE guidelines! Only use compo-
nents with the same specifications for replacement!
Observe MOS components handling instructions when ser-
vicing!
Ci) Attenzione: Osservarne le corrispondenti prescrizioni di
sicurezza VDE 701 (concernente servizio) e VDE 0860/ IEC
65 (concernente il tipo di prodotto)!
/\A\ Componenti secondo le norme VDE risp. te IEC! In caso di
sostituzione impiegare solo componenti con le stesse carat-
teristiche.
Osservare le relative prescrizioni durante, lavori con compo-
nenti MOS!
Attention: Priere d observer les prescriptions de securite
VDE 701 (concernant les reparations) et VDE 0860/IEC 65
(concernant le type de produit}!
Composants répondant aux normes VDE ou IEC. Les rem-
placer uniquement par des composants ayant les memes
spécifications.
Lors de la manipulation des circuits MOS, respecter les
pescriptions MOS!
CE) Atencion: Recomendamos las normas de seguridad VDE u
otras normas equivalentes, por ejemplo: VDE 701 para
reparaciones, VDE 0860 / IEC 65 para aparatos!
Componentes que cumplen las normas VDE/IEC. En caso
/\A\ de sustitucion, emplear componentes con idénticas especi-
ficaciones!
Durante la reparacion observar las normas sobre com-
ponentes MOS!
Attention: This set can only be operated from AC mains of
U.S.& 120 V/60 Hz. Also observe the information given on the rear
Canada _ of the set.
Nd CAUTION-for continued protection against risk of fire re-
place only with same type fuses!
CAUTION: to reduce the risk of electric shock, do not remove
cover (or back), no user-serviceable parts inside, refer
servicing to qualified service personnel. Observe MOS
components handling instructions when servicing!
Cp»
Sicherheitsbestimmungen
Nach Servicearbeiten ist bei Geraten der Schutzklasse || die Messung
des lsolationswiderstandes und des Ableitstromes bei eingeschalte-
tem Gerat nach VDE 0701 / Teil 200 bzw. der am Aufstellort geltenden
Vorschrift, durchzufthren!
Dieses Gerat entspricht der Schutzklasse ll, erkennbar durch das
Symbol {q].
Wir empfehlen die Messungen mit dem METRATESTER 3 durchzu-
fuhren. (MeBgerat zur Priifung elektrischer Gerate nach VDE 0701).
Metrawatt GmbH
Geschaftsstelle Bayern
Triebstr. 44
D 8000 Munchen 50
Ist die Sicherheit des Gerates nicht gegeben, weil
- eine Instandsetzung unmdglich ist
- oder der Wunsch des Benitzers besteht, die Instandsetzung nicht
durchfiihren zu lassen,
so muB dem Betreiber die vom Gerat ausgehende Gefahr schriftlich
mitgeteilt werden.
Empfehlungen fur den Servicefall
¢ Nur Original - Ersatzteile verwenden.
Bei Bauteilen oder Baugruppen mit der Sicherheitskennzeichnung
A sind Original - Ersatzteile zwingend notwendig.
¢ Auf Sollwert der Sicherungen achten.
¢ Zur Sicherheit beitragende Teile des Gerates diirfen weder bescha-
digt noch offensichtlich ungeeignet sein.
* Dies gilt besonders fur Isolierungen und Isolierteile.
¢ Netzleitungen und AnschluBleitungen sind auf auBere Mangel vor
dem AnschluB zu prifen. Isolation prifen!
¢ Die Funktionssicherheit der Zugentlastung und von Biegeschutz-
Tullen ist zu prifen.
* Thermisch belastete Létstellen absaugen und neu ldéten.
¢ BelUftungen frei lassen.
Safety Standard Compliance
After service work on a product conforming to the Safety Ciass Il, the
insulating resistance and the leakage current with the product switch
on must be checked according to VDE 0701 orto the specification valid
at the installation location!
This product conforms to the Safety Class Il, as identified by the
symbol ©].
We recommend that the measurements are carried out using the
METRATESTER 3. (Test equipment for checking electrical products
to VDE 0701).
Metrawatt GmbH
Geschaftsstelle Bayern
Triebstr. 44
D 8000 Munchen 50
if the Safety of the product is not proved, because
- arepair and restoration is impossible
- or the request of the user is that the restoration is not to be carried
out,
the operator of the product must be warned of the danger by a written
warning.
GRUNDIG Service-Technik
Recommendation for service repairs
¢ Use only original spare parts.
With components or assemblies accompanied with the Safety
Symbol A only original-spare parts are strictly to be used.
¢ Use only original fuse value.
¢ Safety compliance, parts of the product must not be visually
damaged or unsuitable. This is valid especially for insulators and
insulating parts.
¢ Mains leads and connecting leads should be checked for external
damage before connection. Check the insulation!
¢ The functional safety of the tension relief and bending protection
bushes are to be checked:
¢ Thermally loaded solder pads are to be suck off and re-soldered.
¢ Ensure that the ventilation slots are not obstructed.

Sicherheitsvorschriften / Safety Requirements
V 304
pt a A A PA
CFD
Prescriptions de securite
Suite aux travaux de maintenance sur les appareils de la classe Il, il
convient de mesurer la résistance d'isolement et le courant de fuite sur
l'appareil en état de marche, contormement a la norme VDE 0701 §
200, ou selonles prescriptions en vigueur sur le lieu de fonctionnement
de l'appareil!
Cet appareil est conforme aux prescriptions de sécurité classe ll,
signaleé par le symbole &.
Pour ces mesures, nous préconisons I utilisation du METRATE-
STER 3 (instrument de mesure pour le contrdle d’appareils électri-
ques conformes a la norme VDE 0701).
METRAWATTWATT GmbH
Geschaftsstelle Bayern
Triebstr. 44
D 8000 Munchen 50
Dans le cas ov la sécurité de l'appareil n’est pas assuree pour les
aisons suivantes:
- laremise en état est impossible
- l'utilisateur ne souhaite pas la remise en état de l'appareil.
l'utilisateur doit étre informe par écrit du danger que représente lutili
sation de l'appareil.
Recommandations pour la maintenance
* Utiliser exclusivement des piéces de rechange d'origine. Les
composants et ensembles de composants signalés par le symbole
A doivent étre impérativement remplacés par des piéces d'origine.
¢ Respecter la valeur nominale des fusibles.
¢ Veiller au bon état et la conformité des piéces contribuant a la
sécurité de fonctionnement de l'appareil. Ceci s'applique particulié-
rement aux isolements et pieces isolantes.
« Véritier le bon état extérieur des cables secteur et des cables de
raccordement au point de vue isolement avant la mise sous ténsion.
¢ Veéritier le bon état des protections de gaine.
* Nettoyer les soudures avant de les renouveler.
- Dégager les voies d’aération.
Cp
Norme di sicurezza
Successivamente ai lavori di riparazione, negli apparecchi della classe
di protezione I] occorre effettuare la misura della resistenza di
isolamento e della corrente di dispersione quando l’apparecchio
e’acceso, secondo le norme VDE 0701 / parte 200 e rispettivamente
le norme locali!
Questo apparecchio corrisponde alla classe di protezione Il ed e
riconoscibile dal simbolo G1.
Si raccomanda di effettuare le misure con lo strtumento METRATE-
STER 3 (strumento di misura per il controllo di apparecchi elettrici
secondo VDE 0701).
Metrawatt GmbH
Geschaftsstelle Bayern
Triebstr. 44
D 8000 Munchen 50
Se la sicurezza dell’apparecchio non é raggiunta, perche
- una riparazione non é possibile
- Oppure édesiderio del cliente che una riparaz. non avvengain questi
casi si deve comunicare per iscritto all’utilizzat.
la pericolosita dell’apparecchio riguardo il suo isolamento.
CED
DISPOSICIONES PARA LA SEGURIDAD
Después de operaciones de servicio en aparatos de la clase de
proteccion Ii, se llevara a cabo la medida de la resistencia de
aislamiento y de la corriente derivada, con e! aparato conectado, de
acuerdo con VDE 0701 o de las disposiciones vigentes en el lugar de
instalacion .
Este aparato corresponde ala clase de proteccidn II, reconocible por
el simbolo @.
Aconsejamos llevar a cabo las medidas con el METRATESTER 3
(Instrumento de medida para la comprobacién de aparatos eléctricos
segun VDE 0701).
METRAWATT GmbH
Geschaftsstelle Bayern
Triebstr. 44
D 8000 Munchen 50
Si no se cumple la seguridad del aparato, porque
- la puesta en orden es imposible, o
- esiste el desco del usuario de no realizarla, se ha de comunicar a
quien lo haga funcionar, por escrito, del peligro dimanante del
aparato.
Raccomandazione per il servizio assistenza
« Impiegare solo componenti originali:
| componenti ot gruppi di componenti contraddistinti dall’ indicaz.
A, devono assolutamente venir sostituiti con parti originale.
¢ Osservare il valore nominale dei fusibili.
* | componenti che concorrono alia sicurezza dell"apparecchio non
possono essere né danneggiati ne risultare visibilmente inadatti.
Questo vale soprattutto per isolamenti e parti isolate.
¢ | cavi di rete e di collegamento vanno controllati prima dell’utilizzo
affinche non presentino imperfezioni esteriori. Controllare l’isola
menio.
¢ E’necessario controllare la sicurezza dei fermacavi e delle guaine
flessibili.
¢ Saldature caricate termicam. vanno rifatte.
* Lasciare libere le fessure di areazione.
Recomendaciones para caso de servicio
¢ Emplear solo componentes originales.
Con componentes o grupos constructivos con el indicativo de se
guridad A\ son de obligada necesidad piezas de repuesto originales.
« Las partes del aparato que contribuyan aia seguridad del mismo no
deben estar deterioradas ni ser manifiestamente inadecuadas.
« Esto es especialmente valido para aislamientos o piezas aislantes.
* Los cables de red y de conexién se comprobaran, antes de concc
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tiro o de los manguitos de proteccién contra doblamientos.
« Repasar los puntos de soldadura sometidos a carga térmica.
¢ Mantener libres los canales aireacién.
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ALLE _NORMI DI SICUREZZA VDE E IEC. IN CASA
TMPTEGABE
QUINDI
SOLTANTO
PEZZI
IN
RICAMBIO
ORIGINALI.
ABSOLUTAMENTE
NECESARIO
PARA
LA
SEGURIDAD
DEL
APARATO
Y
CON LAS
NORMAS
DE
SEGURIDAD
VDE
O
IEC.
es
ECB
BD 827
BD 828
FUER
DIE
CERT
ESECHERHETT
fate
NOTWENDIG
UND
PEN
EN
ACHTUNG |
VORSCHRIFTEN BEIM UMGANG MIT
peer eS BEACHTEN |
OBSERVE MOS COMPONENTS HANDLING
INSTRUCTIONS WHEN SERVICING!
ATTENTION!
LORS DE LA MANIPULATION DES
CIRCUITS MOS, See LES
PESCRIPTIONS MOS
ATTENZIONE!
OSSERVARE LE RELATIVE PRESCRIZIONI
DURANTE , oo CON COMPONENTI MOS!
ATENCION
RESPETAR EL TRATAMIENTO DE
COMPONENTS MOS
M50720-259SP
LC7821
ie) w
m
VON OBEN GESEHEN
TOP VIEW
VUE DE HAUT
VISTA DA SOPRA
VISTO DESDE ARRIBA
STK 4040 X
POWER AMPLIFIER
OUT
BCE
IN re
78M05 BDX78
SPANNUNGEN MIT _VOLTMETER (RI=10Mn), coeur NICHT
ANDERS ANGEGEBEN, GEGEN MASSE GEMESSEN.
MESSWERTE GELTEN BEI 220V NETZSPANNUNG .
IF NOT OHERWISE INDICATED ALL VOLTAGES ARE MEASURED
AGAINST
CHASSIS
WITH
A
VOLTMETER
(RI=10M
).
THE
VALUES
ARE VALID FOR 220V AC MAINS VOLTAGES .
SAUF_
INDICATION
CONTAIRE,
LES
TENSIONS
SONT
MESUREES
PAR
RAPPORT
AU
CHASSIS
AVEC
UN
VOLTMETRE
(RI=10M
)
bE
Onoda.
SONT
VALABLES
POUR
UNE
TENSION
SECTEUR
TENSIONI_MISURATE CON VOLTMETRO (RI=10M ), SALVE
ALTRE
IDICATIONI,
RIFERITE
A
MASSA.
I
VALORI
DI
MISURA
VALGONO CON TENSIONE DI RETE DI 220v .
LAS
TENSIONES,
SIEMPRE
QUE
NO
SE
INDIQUE
OTRA
rebel
SE
_MIDEN
CON
RESPECTO
A
MASA
CON
VOLTIMETRO
(RI=10Mn)
.
LOS
VALORES
DE
MEDIDA
SON
VALIDOS
CON
220V
DE
TENSION
DE
RED.
ABSOLUTELY
NECESSARY
FOR
THE
SAFETY
OF
THE
VBE
Gr
eee
cope
AND
MUST
BE
REPLACED
BY
PARTS
OF
SAME
SPECIFICATION
ONLY.
ef
CONFORME
AUX
REGULATIONS
VDE
ET
TEC.
EN
CAS
DE
REPLACEMENT
.
N‘UTILISER
QUE DES
COMPOSANTS
AVEC
LES
MEMES
SPECIFICATIONS.
ae aaa E SONO_ CONFORMI
DI_SOSTITUZIONE
Y_DE_ ACUERDO
EN CASO DE SUSTITUCION
SUSTITUCTION
SOLO
DEBEN
EMPLEARSE
COMPONENTES
CON
LA
MISMA
ESPECIFICACION
.
GRUNDIG
V 304
20 I ee
GRUNDIG Service-Technik