Life is good Projector RD-JT21 User Manual
1
RD-JT20 / RD-JT21
SERVICE MANUAL
SERVICE MANUAL
C aution
Be sure to read this m anual before servicing. To assure safety from fire, electric shock, injury, harm ful
radiation and m aterials, various m easures are provided in this Acer DLP projector. Be sure to read
cautionary item s described in the m anual to m aintain safety before servicing.
Service W arning
1. W hen replace the lam p, to avoid burns to yor fingers. The lamp becom es too hot.
2. Nevr touch the lam p bulbwith a finger or anything else. Never drop it or give it a shock. They m ay cause
bursting of the bulb.
3. This projector is provided with a high voltage circuit for the lam p. Do not touch the electric parts of
powrer unit (m ain), when turn on the pojector.
4. Do not touch the exhaust fan, during operation.
C ontents
1. Specifications...........................................................................................................................................2
2. Packaging Description.............................................................................................................................4
3. Rem ote Control........................................................................................................................................6
4. Installtin....................................................................................................................................................7
5. Product D escription..................................................................................................................................8
6. Circuit Operation T heory........................................................................................................................21
7. LED Location List...................................................................................................................................27
8. Trouble Shooting....................................................................................................................................28
9. Replacem ent Parts.................................................................................................................................31
10. M aintance.............................................................................................................................................39
11. Parts List...............................................................................................................................................42
12. Schem atics...........................................................................................................................................44
Appendix A Using the Factory Assist Tool..................................................................................................65
Appendix B Firm ware Down-Load Proedure..............................................................................................72
Appendix C Control Projector by using a personal.....................................................................................76
Appendix D DMD Chip................................................................................................................................80
Appendix E Assistance Tool Chart.............................................................................................................82
Appendix F Factory Default Value..............................................................................................................83