Akai PT46DL10 46" HDTV-Ready Television - d88fff33-1642-4020-bca4-2ac984b1ed6c.pdf

Rear Projection TV Service Manual

Prepared by Digital Video Labs, Inc. 6185 Paseo del Norte, Suite 200 Carlsbad, CA 92009 10 December 2004

Revision Summary Section

Change Synopsis Revision 0.0 -- 32 October 2004 Initial release Revision 0.1 -- xx yyy 2004

Revision 0.2 -- xx yyy 2004

service_manual_i 10 December 2004

DVLX Confidential

-1-

Rear Projection TV Service Manual

Table of Contents 1

Scope ..................................................................................................................................................... 3 1.1 Important Safety Instructions.......................................................................................................... 3 2 DVLX4xCx Description .......................................................................................................................... 3 2.1 Product Designation ....................................................................................................................... 3 3 Product Architecture .............................................................................................................................. 4 3.1 Critical Subassemblies ................................................................................................................... 4 3.2 Block Diagram ................................................................................................................................ 6 4 Product Test Environment ..................................................................................................................... 7 5 Service Procedure ...............................................................................................................................10 5.1 E-Box Disassembly & Board Replacement Procedure ................................................................ 22 5.2 Lamp Cartridge Replacement Procedure..................................................................................... 25 5.3 Control Board and LED Board Replacement Procedure ............................................................. 26 6 DVLX4xCx Diagnostic Software Downloading and Operation ............................................................ 26 6.1 Downloading the Diagnostic Software into the DVLX4xCx unit ................................................... 26 6.2 Running the Diagnostic Software ................................................................................................. 27 7 Operational Software Downloading and Operation ............................................................................. 27 7.1 Downloading the Operational Software into the DVLX4xCx unit ................................................. 27 7.2 Reset Picture Settings .................................................................................................................. 28 7.3 VGA Scaling and Border Alignment ............................................................................................. 28 7.4 Video Fine Tuning adjustment...................................................................................................... 29 7.5 Checking and verifying each input on the DVLX4xCx unit........................................................... 30 7.6 Running the remote control test ................................................................................................... 30 7.7 Running the front panel keypad test............................................................................................. 31 7.8 Reverting to user mode and finishing the test .............................................................................. 31 8 Load and Run Operational Software ................................................................................................... 31 9 Run Maintenance Menu BIT ................................................................................................................ 32 10 Run Calibration Procedure............................................................................................................