Grundig 20LCD51-7401, 20LCD51-7402 Schematic
TV Service Manual
Chassis LA2000
20 LCD 51-7401 TOP
GBC9500
20 LCD 51-7402 TOP
GBD5200
Zusätzlich erforderliche Unterlagen für den Komplettservice
Additionally required Service Documents for the Complete Service
Service
Manual
Sicherheit
Safety
Materialnr./Part No.
720108000001
Materialnummer / Part Number 720100519000
Änderungen vorbehalten / Subject to alteration
H-S41 • 0605
http://www.grundig.com
NUR FÜR INTERNEN GEBRAUCH
FOR INTERNAL USE ONLY
GRUNDIG Service Chassis LA2000
Es gelten die Vorschriften und Sicherheitshinweise
gemäß dem Service Manual "Sicherheit", Materialnummer 720108000001, sowie zusätzlich die eventuell abweichenden, landesspezifischen Vorschriften!
Inhaltsverzeichnis
Seite
Allgemeiner Teil ................................... 1-2…1-8
Messgeräte .................................................................................. 1-2
Allgemeine Hinweise.................................................................... 1-2
Technische Daten ........................................................................ 1-3
Bedienhinweise ............................................................................ 1-5
Platinenabbildungen
und Schaltpläne ................................... 2-1…2-6
Blockschaltplan ............................................................................ 2-1
Hauptplatte ................................................................................... 2-1
– Netzteil ..................................................................................... 2-3
– Prozessor ................................................................................. 2-3
– IN/OUT ..................................................................................... 2-4
– Scaler ....................................................................................... 2-5
– Teletext .................................................................................... 2-5
– Audio ........................................................................................ 2-6
Bedieneinheit, Kopfhöhrerplatte................................................... 2-6
The regulations and safety instructions shall be
valid as provided by the "Safety" Service Manual,
part number 720108000001, as well as the
respective national deviations.
Table of Contents
Page
General Section .................................... 1-2…1-8
Test Equipment ............................................................................ 1-2
General Notes .............................................................................. 1-2
Technical Data ............................................................................. 1-3
Operating Hints ............................................................................ 1-7
Layout of the PCBs
and Circuit Diagrams ........................... 2-1…2-6
Block Circuit Diagram .................................................................. 2-1
Main Board ................................................................................... 2-1
– Power Supply ........................................................................... 2-3
– Processor ................................................................................. 2-3
– IN/OUT ..................................................................................... 2-4
– Scaler ....................................................................................... 2-5
– Teletext .................................................................................... 2-5
– Audio ........................................................................................ 2-6
Keybaord, Headphone Board ...................................................... 2-6
Ersatzteillisten ...................................... 3-1…3-2
Allgemeiner Teil
Allgemeine Hinweise
Vor dem Öffnen des Gehäuses den Netzstecker ziehen!
Achtung: ESD-Vorschriften beachten
Leitungsverlegung
Bevor Sie die Leitungen und insbesondere die Masseleitungen lösen,
muss die Leitungsverlegung zu den einzelnen Baugruppen beachtet
werden.
Nach erfolgter Reparatur ist es notwendig, die Leitungsführung wieder
in den werkseitigen Zustand zu versetzen um evtl. spätere Ausfälle
oder Störungen zu vermeiden.
Durchführen von Messungen
Bei Messungen mit dem Oszilloskop an Halbleitern sollten Sie nur
Tastköpfe mit 10:1 - Teiler verwenden. Außerdem ist zu beachten,
dass nach vorheriger Messung mit AC-Kopplung der Koppelkondensator des Oszilloskops aufgeladen sein kann. Durch die Entladung
über das Messobjekt können Bauteile beschädigt werden.
Messwerte und Oszillogramme
Bei den in den Schaltplänen und Oszillogrammen angegebenen
Messwerten handelt es sich um Näherungswerte!
Spare Parts Lists .................................. 3-1…3-2
General Section
General Notes
Before opening the cabinet disconnect the mains plug!
Attention: Observe the ESD safety regulations
Wiring
Before disconnecting any leads and especially the earth connecting
leads observe the way they are routed to the individual assemblies.
On completion of the repairs the leads must be laid out as originally
fitted at the factory to avoid later failures or disturbances.
Carrying out Measurements
When making measurements on semi-conductors with an oscilloscope, ensure that the test probe is set to 10:1 dividing factor. If the
previous measurement was made on AC input, please note that the
coupling capacitor in the oscilloscope will be charged. Discharge via
the item being checked can damage the components.
Measured Values and Oscillograms
The measured values given in the circuit diagrams and oscillograms
are approximates!
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Chassis LA2000GRUNDIG Service
Technische Daten / Technical Data
Order No.
EAN
Approbations
IM-Languages
Destination
Remote control
Color
Display
Panel
16:9 wide-screen format
Panel driving technology
Response time
Brightness
Contrast ratio
Viewing angle approx.
Physical display resolution max. pixel
PICTURE
Digital Reference-Plus-Technology (Motion Adaption)
Line Flicker Reduction
Motion Adaptive Deinterlacing
Digital Color Transition Improv. (DCTI)
Digital Combfilter
Digital Luminance Transition Improv. (DLTI)
Picture Noise Reduction (DNR)
CCS (Clear Color Screen)
Preset picture modes
Aspect ratios (Format switching)
PIP
Multifold Tuner scan (Mosaic Picture)
PAT: Split screen (PICTURE + TEXT)
PAP: Double Window (PICTURE + PICTURE)
P2AT: Double window + TXT
POP: PICTURE on PICTURE
Picture freezing
Zoom with point function
Auto 16:9 selection via Scart
Sharpness control
Blue Background
CHASSIS
TV-Chassis
Progressive
Tuner
Keyboard 7 keys: stand-by, menu, ± for programme, ± for volume, AV-programme (lateral)
20 LCD 51-7401 TOP 20 LCD 51-7402 TOP
G.BC 95-00
40 13833-59873 2
G.BD 52-00
40 13833-60061 9
CE,C-TICK,ME67
D,GB,F,I,NL,DK,N,S,E
D,A,CH,F,I,E,NL,DK,FIN,N,S
RC 200
silver silver/black
20" / 51 cm Clear Color Screen Active Matrix TFT-LC-Display
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MVA
ca. 16ms
ca. 600cd/m2
ca. 600:1
120° vertical / 160° horizontal
VGA 640 x 480
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LA2000
PLL frequency synthesizer tuning
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Chassis LA2000GRUNDIG Service
ELECTRONIC
Stand by indicator
EPG (Electronic Programme Guide)
Easy Dialog
Megalogic
Manual & autom. labeling of prog.
Programmable off timer
Programmable on timer
Intelligent channel search (Zapping funct.)
Programme Edit
Intelligent Programme Switch
Auto switch off
Programme memory TV/AV (opt.)
Teletext/Fasttext/Toptext
Teletext options
Childlock
Youth free recognition
Menu languages OSD
SWAP (Recall function)
Service mode
Hotel mode
TUNING
Autom. Tuning System with country selection
Frequency Based Auto Search
Automatic Micro-search
Automatic Programming
Manual fine tuning
Direct channel selection
Direct frequency selection
PAL/SECAM/BG/DK/I/L’/L
NTSC-Playback via Scart (3,58/4,43)
PAL M/N, NTSC M
Cable TV / Hyperband (S1-S41)
AUDIO
Mono/Stereo/Nicam
AV Stereo
Loudspeaker
Virtual Dolby
Matched Sound Delay (Lip synchronous)
Subwoofer
Dynamic Bass
DSP (Digital Sound Processor)
Balance Adjustment
AVL (Audio Volume Level)
PIP listening via Headphone.jack
Equalizer
Space Sound Effect
Audio mode
Audio amplifier without extern LS
POWER SUPPLY / CABINET
Power voltage
Range of regulation
Power switch
Integrated supply
Plug-in AC adaptor
Power consumption
Cabinet (WxHxD)
Weight
REAR PANEL CONNECTIONS
Euro-AV-Socket AV1
Euro-AV Socket AV2
Euro-AV Socket AV3
S-Video
Camera-AV
Wireless
YUV input / progressive
PC-input (Sub D 15)
PC-Audio in
DVI
HDCP
HDMI
Headphones
REAR PANEL CONNECTIONS
Audio out
Antenna for terrestrial reception
DC-connector
Power supply plug
SUPPLIED ACCESSORIES
Remote control (incl. battery)
Power cord
Cables
Instruction manual
Circuit diagram
Wall fixture integrated
20 LCD 51-7401 TOP 20 LCD 51-7402 TOP
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99 / 6
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10 pages
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6 languages: D, GB, F, I, E, NL
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, full automatic sorting
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2 wide band at the front side
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[, 5 Band
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Yes, user, music, cinema, speech
2 x 5 / 3.5W (music/nominal)
230V
100-240V, 50/60Hz, in accordance to IEC 65
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50W, stand-by < 5W
58,5 x 44 x 7cm (19cm with stand)
ca. 10kg
CVBS in-/output, Audio in/output , RGB input
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Yes, (Hosiden)
Yes, 3x Cinch socket in
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Yes, via Scart
Yes, (Multisync SVGA)
Yes, 3,5mm jack Stereo
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1 x Coaxial-socket for TV-tuner-in, according to DIN 45325
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Power cord plug-in type
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Bedienhinweise Dieses Kapitel enthält Auszüge aus der Bedienungsanleitung.
Weitergehende Informationen entnehmen Sie bitte der gerätespezifischen Bedienungsanleitung, deren Materialnummer Sie in der entsprechenden Ersatzteilliste finden.
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Chassis LA2000GRUNDIG Service
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