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GRUNDIG CUC7301 Repair Manual

$7.99

GRUNDIG CUC7301 - It's a complete service manual, and it's in PDF format. It contains circuit diagrams ( schemas ) etc. It also usually contains parts catalog. After placing order we'll send You download instructions on Your email address. See below for delivery information

The manual is available only in language(s): English


Link to manual will be sent on Your email address after You place order.
This product was added to our catalog on Wednesday 21 November, 2007.
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Click to see text excerpt from the manual
Description des circuits / Circuit DescriptionCUC 7301 F
T665 s'allonge et de ce fait une plus grande quantitŽ d'Žnergie est transmiseIf the feedback voltage decreases by a small amout due to a heavier
pour la compensation de la charge. L'entrŽe de rŽgulation du courant seload the drive pulse to the transistor T665 is prolonged. As a result, the
trouve ? l'IC630-(3). En cas d'augmentation de consommation de courantconducting period of T665 will be longer so that additional energy
c?tŽ secondaire, la commande du transistor T665, IC630-(6), est interrom-transfer will be provided to compensate for the load. Pin 3 of IC630 is
pue via l'entrŽe de rŽgulation pin 3.a current sense input and will stop the drive to T665 at IC630-(6) in the
En cas de court-circuit du transistor T665 le circuit UC3842 seraitevent of excessive current drain from a heavy secondary load.
dŽtruit. C'est pourquoi les diodes D666 et D664 contr?lent la tensionIf there was a short circuit condition at the transistor T665, the circuit
de la pin 3 et la limitent ? 1,2V maximum. Les composants D668, C669UC3842 would be destroyed. Therefore, the diodes D666 and D664
et R669 fonctionnent comme un circuit anti suroscillations.are provided to avoid the voltage at pin 3 exceeding 1.2V. The
Les composants CD654, C656, CD656 et CR656 provoquent uncomponents D668, C669, and R669 work as a snap stage.
accroissement progressif des impulsions de commande (Soft-Start).The components CD654, C656, CD656, and CR656 delay the rise of
A l'aide de l'ajustable R654 les tensions du secondaire sont rŽglŽes parthe pulse start duration (soft start).
l'intermŽdiaire du contr?le de la tension +A, la luminositŽ et le contrasteThe adjustment control R654 is used to set the secondary voltages by
Žtant au minimum.regulating the +A voltage at minimum brightness and contrast.
1.3 Fonctionnement en veille1.3 Standby Mode
En fonctionnement normal une tension d'env.10,5V est disponible ? l'IC676-(1)In normal operating mode, a voltage of approx. 10.5V is present on
(LM317). Si l'appareil doit ?tre commutŽ en veille, le mP passe la tensionIC676-(1) (LM317). If the TV receiver is to be switched to standby, the
U? l'Žtat "Haut" et ainsi la tension ? l'IC676-(1) est < 0,7V. De la sorte lamP switches U to "High" level so that the level on IC676-(1) is
Stanby Standby
tension +B est interrompue et l'appareil commute en veille.< 0.7 V. As a result, the voltage +B is switched off and the TV receiver
goes to standby.
1.4 Tensions du c?tŽ secondaire
+A:Tension d'alimentation pour l'Žtage de dŽviation horizontale1.4 Secondary Voltages
provenant de l'enroulement 5/9 et D682. Le C.I. alimentation+A:Supply for the horizontal output stage from the winding 5/9
est rŽglŽ sur cette valeur.and D682. The power supply unit is set to this level.
+33V: La tension de syntonisation pour le tuner est obtenue ? la+33V: The upper tuning voltage limit for the tuner is produced at the
diode Zener D683 et la rŽsistance R681 depuis l'enroulementZ-diode D683 and the resistors R681 from the winding 5/9 via
5/9 via D682.D682.
+M =16,5V Tension d'alimentation pour l'Žtage final audio provenant+M =16.5V Supply for the sound output stage from the winding 7/5 and
de l'enroulement 7/5 et redressŽe par D671.the diode D671.
+B =12VTension d'alimentation pour le tuner et l'Žtage pilote hori+B = 12V Power supply for the Tuner, SAT-module and the horizon-
zontal T501. Cette tension provient de l'enroulement 7/5,tal driver T501. This voltage is supplied from the winding
traverse la diode D671 et se stabilise par le contr?leur7/5 via the diode D671 and is stabilised by the adjustment
IC676. Pour l'interruption du +12V voir "Fonctionnementcontrol IC676. Switching off of the +12V supply, see
en veille"."Standby Operation".
+E = 8VTension d'alimentation du processeur vidŽo IC150. Celle-+E = 8VPower supply for the Video Processor IC150. In Standby
ci est coupŽe en fonction veille.mode it is switched off.
+H = 5VTension d'alimentation pour le mP IC850, l'ampli infra+H = 5VPower supply for the mP IC850, theinfrared amplifier
rouge IR810, le tŽlŽtexte IC2810, le tuner et le CIC105.IR810, the Videotext IC2810, Tuner, and CIC105.
Cette tension est nŽanmoins prŽsente en fonction veille.This voltage is also present in Standby mode.
Tensions supplŽmentaires nŽcessairesAdditionally necessary voltages
+D: 25VTension d'alimentation pour l'Žtage de dŽviation ver+D: 25VPower supply for the vertical output stage from the line
ticale provenant de l'enroulement du transformateur lignetransformer winding B/H via D444.
B/H via D444.+C: 125V The power supply for the picture tube panel is obtained
+C: 125V La tension d'alimentation pour le C.I. tube est fournie190V from the line transformer winding G/H via R543 and the
190V depuis l'enroulement du transformateur ligne G/H pardiode D543. 130V/14" CRT; 200V/15�21" CRT.
l'intermŽdiaire de R543 et de la diode D543.
130V / tubes de 14"; 200V / tubes de 15"...21".
VccVin
Vcc 7
VrefReference36V
Regulator8V
RInternalccUVLO
2.5VBias+Vc
R T
R-
Vref7
3.6V
UVLO
T665
Output
Oscillator
46
C T
1.0mA
Power Ground
S
+-
Voltage FeedbackQ
Input-+2RR5
2ErrorR1.0VLatchPWM
OutputAmplifierCurrent Sense Input
Compensation
Current Sense3
1CompartatorRs
Gnd5
+Sink Only
=
-Positive True Logic
2 - 2GRUNDIG Service
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