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TOSHIBA AMERICA CONSUMER PRODUCTS, INC.
NATIONAL SERVICE DIVISION
1420-B TOSHIBA DR.
LEBANON, TN 37087
TECHNICAL TRAINING
TV-GEN-03
Subject: Digital Convergence Alignment
Product: PROJECTION TELEVISION, Rear CRT
Chassis: All Toshiba rear CRT projection televisions with digital convergence
Model Year: All
Models: All
Prerequisites: None
Purpose:
Upon completion of this Training Module, the technician will be able to properly
converge a Toshiba CRT-based rear project
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TOSHIBA PJTV Digital Convergence Alignment Consider this: Toshiba CRT based rear projection televisions allow convergence adjustments to be made in two areas: 1. User convergence area - This area can be accessed through the customer picture menu by using the remote control or the front panel keys. Adjustments can only be made by remote control. 2. Service Mode convergence area – This area should only be accessed by qualified service technicians. A remote control is required for
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TOSHIBA PJTV Digital Convergence Alignment When using an overlay kit, it is important to know the type of unit it is designed for use with and the kit part number. The availability and part numbers of the overlay kits are subject to change as screen sizes are added or discontinued. Table 1 details the currently available overlay kit part numbers. Part Screen Aspect Picture Model Number Size Ratio Size Year PSOL40X1 40” 16:9 All All PSOL42W1 42” 16:9 Full 2002+ PSOL43X1 43” 4:3
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TOSHIBA PJTV Digital Convergence Alignment Figure 1 And then… Accessing Service Mode: Once the correct overlay is placed on the screen, the unit must be put into Service Mode before any alignment adjustments are made. There are currently two methods of Service Mode entry, dependant upon the model and type of set. The methods are described as follows: 1. All digital convergence equipped units built prior to 2001 and all interlaced scan units: a. With the unit powered “ON”, pre
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TOSHIBA PJTV Digital Convergence Alignment Readme: RCUT is a data address in the system EEPROM. The hexadecimal data contained in the address will be shown just below it, as shown in Figure 3. Figure 3 2. All progressive scan units built from 2001 forward: a. With the unit powered “ON”, press and release the MUTE key on the remote control two times. b. Press the MUTE key a third time and hold. c. While holding the MUTE key, press the MENU key on the front panel. A pale bl
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TOSHIBA PJTV Digital Convergence Alignment 3. User convergence and magnetic centering a. Disconnect any input to Video 1. b. Enter the user convergence area. c. Vertically and horizontally center all 3 colors in all adjustable areas. d. Exit the user convergence area. e. Enter the convergence alignment service mode. f. Mechanically center all 3 colors. i. Stretch 2 pieces of string diagonally across the screen ii. Rotate the centering rings on each CRTs neck g. Lock the centering
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TOSHIBA PJTV Digital Convergence Alignment End of the line? Specifications Once all conceivable picture size modes have been aligned, verify the convergence meets factory specifications. The specifications listed in Table 2 reflect the maximum allowable misconvergence, in any direction, referencing either red or blue to green. Screen Zone Size A B C D E F G H J 40 0.5mm 3.5mm 2.5mm 3.5mm 2mm 3.5mm 2.5mm 3.5mm 2mm 42 0.5mm 3.5mm 2.5mm 3.5mm 2mm 3.5mm 2.5mm 3.5mm 2mm 43 0.5mm
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TOSHIBA PJTV Digital Convergence Alignment Readme: Backup data should be loaded only if corruption of the original data is suspected or if the set is severely misconverged. Minor misconvergence issues should be corrected by performing the appropriate alignment procedure. To load back up data: 1. Enter Service Mode as described in the appropriate Service Manual. 2. Enter convergence alignment mode by pressing the “7” key on the remote. 3. Display vertical stripes by pressing the “
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TOSHIBA PJTV Digital Convergence Alignment Readme: Do not attempt to load backup data if the digital convergence PCB has been replaced. Backup data in the new PCB memory is not created until convergence has been adjusted and the CALIBRATION procedure has been completed. Something to think about: It is important to know when a convergence alignment will not correct the unit problem. If after following the correct procedure, the convergence cannot be aligned to factory specifica
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TOSHIBA PJTV Digital Convergence Alignment Appendix A Interlaced Scan Units with 4:3 Aspect Ratio Section 1: OPTICAL & ELECTRICAL FOCUS 1. Follow the appropriate disassembly instructions to gain access to the CRTs. 2. If the wing nuts on the lenses are pointed toward the screen, reverse the lenses on each tube so the wing nuts are facing the back of the set. Leave the lenses in this position after servicing. Put the screen assembly back on. 3. From the Service Mode pre
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TOSHIBA PJTV Digital Convergence Alignment Appendix A 5. Move the red horizontal cross hair as far as it will go toward the top of the screen. Note the location. Move the red horizontal cross hair as far as it will go toward the bottom of the screen. Note that location. Set the red horizontal cross hair to the center of the two extremes. 6. Repeat steps 4 and 5 for the blue cross hair. 7. Repeat steps 4, 5, and 6 for all user convergence adjustment points. 8. Exit the customer c
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TOSHIBA PJTV Digital Convergence Alignment Appendix A Readme: If the microcomputer memory IC (QA02) has been replaced, or the crosshatch pattern is not reasonably close to the overlay pattern, make the adjustments in Section 9. (WID, HIT, & VLIN ADJUSTMENTS). Then proceed with step 5. 5. Push the 3 key on the remote until the blinking cursor in the upper left corner of the screen is green. 6. Move the blinking cursor to the right with the 6 key, then down with the 8 key,
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TOSHIBA PJTV Digital Convergence Alignment Appendix A Section 9: WIDTH, HEIGHT, & VERTICAL LINEARITY ADJUSTMENTS Readme: See the notes in Section 5, before performing the following procedure. 1. Exit the convergence adjustment mode as described in Section 2. 2. Press the MENU button on the unit control panel to display the RCUT register. 3. Use the channel up/ down keys to select the WID register. 4. Use the volume keys to adjust the WID register until the vertical lines are
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TOSHIBA PJTV Digital Convergence Alignment Appendix B 4:3 Progressive Scan Units with Touch Focus Section 1: OPTICAL & ELECTRICAL FOCUS 1. Follow the appropriate disassembly instructions to gain access to the CRTs. 2. If the wing nuts on the lenses are pointed toward the screen, reverse the lenses on each tube so the wing nuts are facing the back of the set. Leave the lenses in this position after servicing. Put the screen assembly back on. Readme: The wing nuts can
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TOSHIBA PJTV Digital Convergence Alignment Appendix B 4. “Finish” will appear on screen when the “Touch Focus” procedure is complete. The unit will return to service mode and display a normal picture with the letter “S” in the upper right corner. Readme: Beginning with units in 2002, Touch Focus will run twice. The first scan will be at a faster rate than the second scan. “CALIBRATION FINISHED” will appear on the screen before the unit returns to the Service Mode. 5. Power t
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TOSHIBA PJTV Digital Convergence Alignment Appendix B 4. Check the centering of the crosshatch pattern. Use the center cross hairs of the convergence overlay, or two pieces of string stretched diagonally across the screen, to locate the center. 5. If the horizontal position is off, use the channel up or down key to select the HPOS register. Use the volume key to center the pattern. 6. If the vertical position is off, use the channel up or down key to select the VPOS register. Use
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TOSHIBA PJTV Digital Convergence Alignment Appendix B Section 7: BLUE CONVERGENCE 1. Push the 100 key to turn off the red tube, and CH RTN/ENT to turn on the blue tube. 2. Push the 3 key until the cursor turns blue. 3. Align the blue convergence to the green pattern, using the same procedure used to align the green convergence pattern to the overlay. 4. Push the 100 key to turn on the red tube and check the convergence with all three tubes on. The convergence pattern should be wh
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TOSHIBA PJTV Digital Convergence Alignment Appendix C 16:9 Progressive Scan Units with Touch Focus Section 1: OPTICAL & ELECTRICAL FOCUS 1. Follow the appropriate disassembly instructions to gain access to the CRTs. 2. If the wing nuts on the lenses are pointed toward the screen, reverse the lenses on each tube so the wing nuts are facing the back of the set. Leave the lenses in this position after servicing. Put the screen assembly back on. Readme: The wing nuts can be acce
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TOSHIBA PJTV Digital Convergence Alignment Appendix C 4. “Finish” will appear on screen when the “Touch Focus” procedure is complete. The unit will return to service mode and display a normal picture with the letter “S” in the upper right corner. Readme: Beginning with units in 2002, Touch Focus will run twice. The first scan will be at a faster rate than the second scan. “CALIBRATION FINISHED” will appear on the screen before the unit returns to the Service Mode. 5. Power t
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TOSHIBA PJTV Digital Convergence Alignment Appendix C 4. Check the centering of the crosshatch pattern. Use the center cross hairs of the convergence overlay, or two pieces of string stretched diagonally across the screen, to locate the center. 5. If the horizontal position is off, use the channel up or down key to select the HPOS register. Use the volume key to center the pattern. 6. If the vertical position is off, use the channel up or down key to select the VPOS register. Use
