GRUNDIG Service Chassis L5C-14"20"
Es gelten die Vorschriften und Sicherheitshinweise gemä� dem The regulations and safety instructions shall be valid as
Service Manual "Sicherheit", Materialnummer 720108000001, provided by the "Safety" Service Manual, part number
sowie zustzlich die eventuell abweichenden, landesspezi-720108000001, as well as the respective national devia-
schen Vorschriften!tions.
InhaltsverzeichnisTable of Contents
SeitePage
Allgemeiner Teil .................................. 1-21-12General Section .................................. 1-21-12
Allgemeine Hinweise .....................................................................1-2General Notes ...............................................................................1-2
Technische Daten ..........................................................................1-3Technical Data ...............................................................................1-3
Bedienhinweise .............................................................................1-7Operating Hints ..............................................................................1-9
Service- und Sonderfunktionen ...................................................1-11Service and Special Functions ....................................................1-11
PlatinenabbildungenLayout of the PCBs
und Schaltplne .................................. 2-12-26and Circuit Diagrams ......................... 2-12-26
Blockschaltplan ..............................................................................2-1Block Circuit Diagram ....................................................................2-1
Hauptplatte QW1190-3 ..................................................................2-2Main Board QWQW11911900-3-3 ..................................................................2-2
- Netzteil .......................................................................................2-6- Power Supply .............................................................................2-6
- Tuner ..........................................................................................2-6- Tuner ..........................................................................................2-6
- IN/OUT, CVT-IF ..........................................................................2-7- IINN//OOUUTT,, CCVVTT--IIFF ..........................................................................2-7
- VGA-Eingang und RGB-Umschalter ..........................................2-8- VGA Input and RGB Switches ...................................................2-8
- Audio-Umschalter ......................................................................2-9- Audio Switches ..........................................................................2-9
- Kopfhrer ...................................................................................2-9- Headphone ................................................................................2-9
- Inverter-Steuerung .....................................................................2-9- Inverter Control ..........................................................................2-9
- Verstrker .................................................................................2-10- Amplier ...................................................................................2-10
- Scaler.......................................................................................2-10- Scaler.......................................................................................2-10
Hauptplatte QW1190-8 ................................................................2-12Main Board QWQW11911900-8-8 ................................................................2-12
- Netzteil .....................................................................................2-16- Power Supply ...........................................................................2-16
- Tuner ........................................................................................2-16- Tuner ........................................................................................2-16
- IN/OUT, CVT-IF ........................................................................2-17- IINN//OOUUTT,, CCVVTT--IIFF ........................................................................2-17
- VGA-Eingang und RGB-Umschalter ........................................2-18- VGA Input and RGB Switches .................................................2-18
- Audio-Umschalter ....................................................................2-19- Audio Switches ........................................................................2-19
- Kopfhrer .................................................................................2-19- Headphone ..............................................................................2-19
- Inverter-Steuerung ...................................................................2-19- Inverter Control ........................................................................2-19
- Verstrker .................................................................................2-20- Amplier ...................................................................................2-20
- Scaler.......................................................................................2-20- Scaler.......................................................................................2-20
Zusatzplatte "Daughter Board" (Y48192, Y48194) ......................2-22Daughter Board (Y4(Y481928192,, Y4Y48198194)4) .............................................2-22
Bedieneinheiten (ZG8191, ZG9191, ZN2191).............................2-23Keyboards (Z(ZG8191G8191,, ZZG9191G9191,, ZZN2191N2191)) .....................................2-23
Bedieneinheiten (ZN7191, ZP3191, ZR6191) .............................2-24Keyboards (Z(ZG8191G8191,, ZZG9191G9191,, ZZN2191N2191)) .....................................2-24
Bedieneinheit (ZR7191)...............................................................2-25Keyboard (Z(ZR7191R7191)) .....................................................................2-25
IR/LED-Platte (ZG5192, ZP3193, ZP8191) .................................2-25IR/LED Board (Z(ZG5192G5192,, ZZP3193P3193,, ZZP8191P8191)) .................................2-25
Kopfhrer-Platte (8R9198) ..........................................................2-26Headphone Board ((8R91988R9198)) .......................................................2-26
Netzschalter-Platten (ZG9193, ZP3195, ZR6192) ......................2-26Power Switch Boards (Z(ZG9193G9193,, ZZP3195P3195,, ZZR6192R6192)) .....................2-26
Ersatzteillisten .................................... 3-13-10Spare Parts Lists ................................ 3-13-10
Allgemeiner TeilGeneral Section
Allgemeine HinweiseGeneral Notes
Vor dem ffnen des Gehuses den Netzstecker ziehen!Before opening the cabinet disconnect the mains plug!
Achtung: ESD-Vorschriften beachten Attention: Observe the ESD safety regulations
LeitungsverlegungWiring
Bevor Sie die Leitungen und insbesondere die Masseleitungen lsen, Before disconnecting any leads and especially the earth connecting
muss die Leitungsverlegung zu den einzelnen Baugruppen beachtet leads observe the way they are routed to the individual assemblies.
werden. Nach erfolgter Reparatur ist es notwendig, die Leitungsführung On completion of the repairs the leads must be laid out as originally
wieder in den werkseitigen Zustand zu versetzen um evtl. sptere tted at the factory to avoid later failures or disturbances.
Ausflle oder Strungen zu vermeiden.
Carrying out Measurements
Durchfhren von MessungenWhen making measurements on semi-conductors with an oscilloscope,
Bei Messungen mit dem Oszilloskop an Halbleitern sollten Sie nur ensure that the test probe is set to 10:1 dividing factor. If the previous
Tastkpfe mit 10:1 - Teiler verwenden. Auerdem ist zu beachten, dass measurement was made on AC input, please note that the coupling
nach vorheriger Messung mit AC-Kopplung der Koppelkondensator capacitor in the oscilloscope will be charged. Discharge via the item
des Oszilloskops aufgeladen sein kann. Durch die Entladung ber das being checked can damage the components.
Measured Values and OscillogramsMessobjekt knnen Bauteile beschädigt werden.
Messwerte und OszillogrammeThe measured values given in the circuit diagrams and oscillograms
Bei den in den Schaltplnen und Oszillogrammen angegebenen are approximates!
Messwerten handelt es sich um Nherungswerte!
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ACEC
GRUNDIG
