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27'' LCD TV Color Monitor AOC L27W451B
Service
Service
Service
Horizontal Frequency
31.5KHz-48KHz
TABLE OF CONTENTS
Description Page Description Page
Table Of Contents......................................................1 7.2 Power Board...................................................39
Revision List........................................................2 7.3 Key Board..........................................................42
1. Monitor Specification...............................................3 7.4 IR Board...............................................42
2. Operating Instructions.........................................5 7.5 DC-DC Board...............................................44
2.1 The Use Of Remote Control....................................5 7.6 Earphone Board............................................45
2.2 The Use Of Teletext............................................6 8. Block Diagram.................................................46
2.3 Front Panel Control Knobs.....................................7 8.1 Main Board.............................................46
2.4 OSD Operations...................................................8 8.2 Power Board..........................................47
2.5 How To Connect..................................................16 8.3 Exploded View.......................................48
3. Input/Output Specification......................................20 9. Schematic Diagram..............................49
3.1 Input Signal Connector..........................................20 9.1 Main Board........................................49
3.2 RGB Input Signal Timing .......................................21 9.2 Power Board...........................................61
4. Mechanical Instructions.......................................22 9.3 Tuner Board................................................63
5. Repair Flow Chart ..........................................27 9.4 Earphone Board...................................66
6. White Balance Luminance Adjustment...............33 10. BOM List.........................................................67
7. PCB Layout.....................................................37 11. Different Parts List.............................................94
7.1 Main Board....................................................37
SAFETY NOTICE
ANY PERSON ATTEMPTING TO SERVICE THIS CHASSIS MUST FAMILIARIZE HIMSELF WITH THE
CHASSIS 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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27'' LCD TV Color Monitor AOC L27W451B
Revision List
Version Release Date Revision Instructions TPV Model
A00 Oct.-30-2006 Initial Release E275MTNBC3A3NP
A00 Nov.-22-2006 Second Release E275MTNBC3AC2P
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27'' LCD TV Color Monitor AOC L27W451B
1. Monitor Specifications
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27'' LCD TV Color Monitor AOC L27W451B
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27'' LCD TV Color Monitor AOC L27W451B
2. Operations Instructions
2.1 The Use of Remote Control
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27'' LCD TV Color Monitor AOC L27W451B
2.2 The Use Of Teletext
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27'' LCD TV Color Monitor AOC L27W451B
2.3 Front Panel Control Knobs
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27'' LCD TV Color Monitor AOC L27W451B
2.4 OSD Operations
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27'' LCD TV Color Monitor AOC L27W451B
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27'' LCD TV Color Monitor AOC L27W451B
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27'' LCD TV Color Monitor AOC L27W451B
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27'' LCD TV Color Monitor AOC L27W451B
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27'' LCD TV Color Monitor AOC L27W451B
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27'' LCD TV Color Monitor AOC L27W451B
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27'' LCD TV Color Monitor AOC L27W451B
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27'' LCD TV Color Monitor AOC L27W451B
2.5 How to Connect
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27'' LCD TV Color Monitor AOC L27W451B
3. Input/Output Specification
3.1 Input Signal connector
This procedure gives you instructions for installing and using the LCD TV display.
Lay the display on the desired operation and plug the power cord into a convenient AC outlet. Three-wire power cord
must be shielded and is provided as a safety precaution as it connects the chassis and cabinet to the electrical
conduct ground. If the AC outlet in your location does not have provisions for the grounded type plug, the installer
should attach the proper adapter to ensure a safe ground potential.
Connect the 15-pin D-SUB color display shielded signal cable to your signal system device and lock both screws on
the connector to ensure firm grounding. The connector information is as follow:
1 5
6
10
11 15
15 - Pin Color Display Signal Cable
Pin No. Description
1 Red Video
2 Green Video
3 Blue Video
4 Not used
5 GROUND
6 Red Video Ground
7 Green Video Ground
8 Blue Video Ground
9 No Pin
10 Sync. Ground
11 Not used
12 Serial Data for DDC
13 Horizontal Sync.
14 Vertical Sync.
15 Serial Clock for DDC
Apply power to the display by turning the power switch to the "ON" position and allow about ten seconds for Panel
warm-up. The Power-On indicator lights "GREEN" when the display is on.
With proper signals feed to the display, a pattern or data should appear on the screen, adjust the brightness and
contrast to the most pleasing display, or press auto-adjust to get the best picture-quality.
This TV (with PC function) has power saving function following the VESA DPMS. Be sure to connect the signal
cable to the PC.
If your TV requires service, it must be returned with the power cord.
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27'' LCD TV Color Monitor AOC L27W451B
3.2 RGB Input Signal Timing
Horizontal Vertical Sync Polarity Presence Screen Mode
Dots Lines Frequency Frequency Horizontal Vertical Horizonta Vertical Normal FULL
(kHz) (Hz) (4:3) (16:9)
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