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PDF 37LD8D20E Data sheet ( Hoja de datos )

Número de pieza 37LD8D20E
Descripción TFT LCD TV SERVICE MANUAL
Fabricantes Hitachi 
Logotipo Hitachi Logotipo



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SERVICE MANUAL
MANUEL D'ENTRETIEN
WARTUNGSHANDBUCH
CAUTION:
Before servicing this chassis, it is important that the service technician read the “Safety
Precautions” and “Product Safety Notices” in this service manual.
ATTENTION:
Avant d’effectuer l’entretien du châssis, le technicien doit lire les «Précautions de sécurité»
et les «Notices de sécurité du produit» présentés dans le présent manuel.
VORSICHT:
Vor Öffnen des Gehäuses hat der Service-Ingenieur die „Sicherheitshinweise“ und „Hinweise
zur Produktsicherheit“ in diesem Wartungshandbuch zu lesen.
No. 0243
32LD8D20E
32LD8D20EA
32LD8D20U
32LD8D20UA
32LD8D20UC
37LD8D20E
37LD8D20U
37LD8D20UA
37LD8D20UC
Data contained within this Service
manual is subject to alteration for
improvement.
Les données fournies dans le présent
manuel d’entretien peuvent faire l’objet
de modifications en vue de perfectionner
le produit.
Die in diesem Wartungshandbuch
enthaltenen Spezifikationen können sich
zwecks Verbesserungen ändern.
Contents
1. Introduction
11. Service Menu Settings
2. Tuner
12. Block Diagrams
3. Audio Amplifier Stage
13. Troubleshooting Guide
4. Power Stage
14. Connectors
5. Microcontroller (VCTP)
15. Concept ICs
6. DRX 3961A
16. Replacement Parts
7. Serial 64K I2C EEPROM
17. Assembly Drawing
8. Class AB Stereo Headphone
18. Schematic Diagrams
Driver
19. PCB Layout Diagrams
9. SAW Filter X6966M
10. IC Descriptions
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT
Colour Television
December 2007

1 page




37LD8D20E pdf
5. MICROCONTROLLER (VCTP)
5.1 General Features
The VCT 6wxyP is dedicated to high-quality FPD and double-scan TV sets. The VCT
6wxyP family is based on functional blocks contained and approved in existing products
like VCT 49xxI, VSP 94x5B, and DPS 94xxA.
Each member of the family contains the entire audio, video, up-conversion processing
for 4:3 and 16:9 50/
60 Hz progressive or 100/120 Hz interlaced stereo TV sets and the control/data
interface for flat-panel displays. The integrated microcontroller is supported by a
powerful OSD and graphics generator with integrated teletext acquisition.
Controller:
x High-performance 8-bit microcontroller, 8051 compatible
x Up to 512 kByte in system program Flash
x WST, PDC, VPS, and WSS acquisition
x Closed caption and V-chip acquisition
x Up to 10 page on chip teletext memory
x Up to 1000 pages with internal memory
x Up to 30 GPIO
Audio:
x Multistandard TV-sound demodulation:
-All A2/NICAM standards
-BTSC/SAP with DBX
-EIA-J
x Baseband sound processing for loudspeaker channel:
-Volume, bass, treble, loudness, balance
-Spatial effect (e.g. pseudo stereo)
-Micronas AROUND
(Virtual Dolby Surround optional)
-Micronas BASS
-BBE
-SRS WOW
-SRS TruSurround XT
-Lipsync function
Video:
x CVBS, S-VHS, YCrCb and RGB inputs
x HDTV YPrPb and RGB inputs
x ITU656 input
x Linedoubling with vertical detail enhancement (without internal memory)
x State of the art motion adaptive up conversion (with internal memory)
x 4H adaptive comb filter for PAL/NTSC (without internal memory)
x 3D comb filter for PAL/NTSC (with internal memory) (Optional)
x Internal SDR RAM interface
x Powerful horizontal and vertical scaling inclusive
x Nonlinear horizontal scaling “panorama vision”
x picture adaptive image improvements (DCE, LSE, CTI, SCE, NCE)

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