Hisense MTK8222, Service Manual

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LCD TV Service Manual
Hisense Confidential
Contents
Contents .......................................................................................................................................................................- 2 -
Service Manual ...........................................................................................................................................................- 3 -
1. Precautions and notices.....................................................................................................................................- 3 -
1.1 Warning...................................................................................................................................................- 4 -
1.2 Notes.......................................................................................................................................................- 7 -
2. Factory/Service OSD Menu and Adjustment..................................................................................................- 10 -
2.1 To enter the Factory OSD Menu ...........................................................................................................- 10 -
2.2 Factory OSD Menu...............................................................................................................................- 10 -
3
Software Upgrading........................................................................................................................................- 14 -
3.1 Before upgrading, read the following. ..................................................................................................- 14 -
3.2 Get ready for upgrading........................................................................................................................- 14 -
3.3 Upgrading with the MtkTool ................................................................................................................- 16 -
3.4 Update with USB directly.....................................................................................................................- 21 -
4. Circuit instruction ...........................................................................................................................................- 23 -
4.1 Power assign and block diagram ..........................................................................................................- 23 -
4.2 Image and signal process ......................................................................................................................- 25 -
4.3 The main IC description .......................................................................................................................- 29 -
4.4 Troubleshooting ....................................................................................................................................- 54 -
4.4.1 Troubleshooting for Remote Control .........................................................................................- 54 -
4.4.2 Troubleshooting for Function Key.............................................................................................- 55 -
4.4.3 TV won’t Power On...................................................................................................................- 56 -
4.4.4 Troubleshooting for Audio.........................................................................................................- 57 -
4.4.5 Troubleshooting for TV/VGA/HDMI input...............................................................................- 58 -
4.4.6 Troubleshooting for YPbPr input ...............................................................................................- 59 -
4.4.7 Troubleshooting for Video/S-Video input..................................................................................- 60 -
5. Explode View..................................................................................................................................................- 61 -
6. Schematic circuit diagram ..............................................................................................................................- 61 -