Hitachi 32LD4550U Schematic

32″LCD TV Hitachi 32LD4550U

Service

43~58 kHz

Description Page Description Page

Table Of Contents.......……..............................…........1

Important Safety Notice.......................................……......2

Revision List…………………………………………………3

1. General Specification..............................………........4

2. Operating Instructions…………………….……….......5

2.1. The Use Of Remote Control…….………….…….......5

2.2. To Use The Menu…...…………………….……….......6

2.3. External equipment setup…….……………………......47

2.4. Front Panel Control Knobs……………….……….....58

3. Input/Output Specification…………....................…....59

4. Mechanical Instructions…………………….................61

5. Repair Flow Chart ……………………….…….…….....64

6. PCB Layout ………………..………………....….......69

ANY PERSON ATTEMPTING TO SERVICE THIS CHASSIS MUST FAMILIARIZE HIMSELF WITH THE CHASSIS

Horizontal Frequency

TABLE OF CONTENTS

6.1.Main Board…………..……………...……….......69

6.2.Power Board……………..………….……….......72

6.3.Key Board………………………..……….......73

6.4.IR Board…………………………..……….......73

7. White-Balance, Luminance Adjustment...................74

8. Block Diagram.……...........................................76

9. Schematic……………...…………..………………...77

9.1 Main Board…………………………………...….......77

9.2.Power Board…………….…………...………….......96

9.3.Key Board……………….……….………….......97

10. Exploded View………………………………….…...98

11. BOM List……………….……………………………99

SAFETY NOTICE

AND BE AWARE OF THE NECESSARY SAFETY PRECAUTIONS TO BE USED WHEN SERVICING

ELECTRONIC EQUIPMENT CONTAINING HIGH VOLTAGES.

CAUTION: USE A SEPARATE ISOLATION TRANSFOMER FOR THIS UNIT WHEN SERVICING

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32″LCD TV Hitachi 32LD4550U

Important Safety Notice

Proper service and repair is important to the safe, reliable operation of all AOC Company Equipment. The service

procedures recommended by AOC and described in this service manual are effective methods of performing service

operations. Some of these service operations require the use of tools specially designed for the purpose. The

special tools should be used when and as recommended.

It is important to note that this manual contains various CAUTIONS and NOTICES which should be carefully read in

order to minimize the risk of personal injury to service personnel. The possibility exists that improper service

methods may damage the equipment. It is also important to understand that these CAUTIONS and NOTICES ARE

NOT EXHAUSTIVE. AOC could not possibly know, evaluate and advise the service trade of all conceivable ways in

which service might be done or of the possible hazardous consequences of each way. Consequently, AOC has not

undertaken any such broad evaluation. Accordingly, a servicer who uses a service procedure or tool which is not

recommended by AOC must first satisfy himself thoroughly that neither his safety nor the safe operation of the

equipment will be jeopardized by the service method selected.

Hereafter throughout this manual, AOC Company will be referred to as AOC.

WARNING

Use of substitute replacement parts, which do not have the same, specified safety characteristics might create

shock, fire, or other hazards.

Under no circumstances should the original design be modified or altered without written permission from AOC.

AOC assumes no liability, express or implied, arising out of any unauthorized modification of design.

Servicer assumes all liability.

FOR PRODUCTS CONTAINING LASER:

DANGER-Invisible laser radiations when open AVOID DIRECT EXPOSURE TO BEAM.

CAUTION-Use of controls or adjustments or performance of procedures other than those specified herein may

result in hazardous radiation exposure.

CAUTION -The use of optical instruments with this product will increase eye hazard.

TO ENSURE THE CONTINUED RELIABILITY OF THIS PRODUCT, USE ONLY ORIGINAL MANUFACTURER'S

REPLACEMENT PARTS, WHICH ARE LISTED WITH THEIR PART NUMBERS IN THE PARTS LIST SECTION OF

THIS SERVICE MANUAL.

Take care during handling the LCD module with backlight unit

-Must mount the module using mounting holes arranged in four corners.

-Do not press on the panel, edge of the frame strongly or electric shock as this will result in damage to the screen.

-Do not scratch or press on the panel with any sharp objects, such as pencil or pen as this may result in damage to

the panel.

-Protect the module from the ESD as it may damage the electronic circuit (C-MOS).

-Make certain that treatment person’s body is grounded through wristband.

-Do not leave the module in high temperature and in areas of high humidity for a long time.

-Avoid contact with water as it may a short circuit within the module.

-If the surface of panel becomes dirty, please wipe it off with a soft material. (Cleaning with a dirty or rough cloth may damage the panel.)

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32″LCD TV Hitachi 32LD4550U

Revision List

Version Release Date Revision Instructions TPV Model

A00 Aug.-16-2008 Initial Release E32RM2NBW7HKNN

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32″LCD TV Hitachi 32LD4550U

1. General Specification

Items Specification

Panel Type PANEL V315B3-L01 C1

Driving system TFT-LCD CMO Panel

Aspect Ratio 16: 9

Resolutions 1366 x 768

LCD Panel

TV Function

Video Inputs

Audio Output Audio Output: L / R

OSD language English, etc

Wall Mount VESA 100 mm x 100 mm

Brightness

Contrast 2500:1

Pixel Pitch

Display colors 16.7 million

Color Temperature Cool / Warm/normal

TV Standard PAL BG/DK/I: SECAM LL’/DK: DVB-T

Color systems PAL BG/DK/I: SECAM LL’/DK: DVB-T

AV RCA x 1 Audio L/R x 1

S-Video S-Video x 1 Audio L/R x 1

COMPONENT Y,Cb,Cr x 1 Audio channel L / Rx 1

HDMI 480i /480p, 576i/576p,720p,1080i ,1080P

SCART RGBx1,Y/Cx2,CVBSx2

Power Supply AC90V~264V, 50/60 Hz ± 3 Hz

500 cd/㎡

0.17025（H）x0.51075（V）

Speaker (built-in): Two 10W speakers

Headphone Mini-jack for stereo (3.5ø)

Power

Environment

Power Consumption

Operating Temperature

Storage Temperature

Operating Humidity 10% ~ 90%

< 180W

<1W (in standby mode)

5～35 °C

﹣20°C ~ 50 °C

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32″LCD TV Hitachi 32LD4550U

2. Operating Instructions

2.1 The Use of Remote Control

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2.2 To Use the Menus

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