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32LD8D20U Schematic ( Datenblatt PDF ) - Hitachi

Teilenummer 32LD8D20U
Beschreibung TFT LCD TV SERVICE MANUAL
Hersteller Hitachi
Logo Hitachi Logo 

Gesamt 30 Seiten
		
32LD8D20U Datasheet, Funktion
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






32LD8D20U Datasheet, Funktion
x non-linear colorspace enhancement (NCE) with 32 programmable slopes and
sections per RGB component (blue stretch, static black stretch, gamma
correction).
x Dynamic contrast enhancement (DCE) (histogram based black stretch with peak
black and activity detection and contrast adaption)
x Luma sharpness enhancement (LSE)
x Colour transient improvement (CTI)
x Selective colour enhancement (SCE) for skin tone correction, blue and green
stretch
5.2 Multistandard Sound Processor (MSP) Features
The MSP receives the analog Sound IF signal from the tuner and converts it to digital
with its internal SIF-AD converter. The MSP is able to demodulate all TV sound
standards worldwide including the digital NICAM system. TV stereo sound standards
that are unavailable for a specific VCTP version are processed in analog mono sound of
the standard. In that case, stereo or bilingual processing will not be possible.
x Sound IF input
x Worldwide FM/AM-mono sound demodulation
x FM stereo sound demodulation (A2, EIA-J)
x BTSC/SAP demodulation with DBX
x NICAM demodulation
x FM radio & RDS/RBDS demodulation
x Automatic standard detection
x automatic volume correction (AVC)
x Automatic sound select
x Baseband processing for loudspeaker channel:
volume, bass, treble, loudness, balance
-spatial effect (e.g. pseudo stereo)
-Micronas AROUND
-Micronas BASS
-SRS WOW (optional)
-SRS TruSurround XT (optional)
-delayline for lipsync function (shared memory)
-Virtual Dolby Surround (optional)
x 1 I2S input for external ATSC/DVD decoder
x 1 I2S interface for audio delayline
x 1 SPDIF output
x Audio i/o switches
-4 analog stereo line inputs and 2 analog stereo line outputs (configurable 5
analog stereo line inputs and 1 analog stereo line output)
-1 analog stereo loudspeaker output
-1 analog subwoofer output
-1 analog stereo headphone output
5.3 Video Features
The TVT is a Teletext decoder for decoding World System Teletext data, as well as
Video Programming System (VPS), Program Delivery Control (PDC), and Wide-Screen
Signalling (WSS) data used for PALplus transmissions (line 23). The device also
supports Closed Caption acquisition and decoding.

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