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This is a high quality manual with clear schematic and components layout diagrams ; with service procedure included.
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This service manual for the Kenwood KT-990D was reproduced really well ,is very legible and manual is complete.Combined with the low price paid,in the future,I will be checking Owner-Manuals.com any time I need a manual.
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When I purchased this manual I had my doubts regarding the quality as the price was so reasonable as compared to other outlets.
The manual itself is of high standard the print is very clear as are the diagrams. Obviously with the diagrams one has to zoom in otherwise it is to small to be able to read.
Overall I am very pleased with the company who delivered as they said and with the manual they supplied.
I occasionally require a manual and now having registered with this company I shall order from them in the future.
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I was at first dubious about payiong for downloaded manuals but having done so, I was extremely impressed with quality of the two manual I ordered, well worth the small price I paid.
I would highly recommend these to my friends.
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reasonable price for the schematic - the service is perfect, all as expected and pointed by instructions - good scan of the original plans - thank you!
Pincushion Adjustment (D05)
Procedure: 1. Cover Red and Blue Lenses. 2. Apply a crosshatch pattern. 3. Set DAC D0F from 0 to 1 (disabling digital convergence). 4. Adjust DAC D05 (Pincushion) by pressing CH updown and confirm that size is 30±5mm at �A� (See Figure 33) �A�
9. Transfer lens cover from blue to red, so that blue is projected. 10. Adjust blue deflection coil until the horizontal center line matches the pattern of the grid and is leveled. 11. Adjust blue centering magnets until the monoscope pattern center is at the appropriate distance as indicated on Figure 34. 12. Enable digital convergence by changing DAC D0F from 1 to 0. 13. Following the adjustment, make sure that all deflection coils are pushed completely toward the CRT cones and that all screws are tightened.
Horizontal Size Adjustment (D03)
Figure 33. Pincushion Adjustment 5. If Trapezoid adjustment is required after this adjustment, perform trapezoid adjustment. 6. Enable digital convergence by changing DAC D0F from 1 to 0 and remove caps from lenses. This is the manual adjustment of horizontal size that is included in the automatic convergence adjustment. 1. Apply a monoscope pattern. 2. Set DAC D0F from 0 to 1 (disabling digital convergence). 3. Cover both red and blue lens. 4. In service mode, adjust H-Size DAC (D03) until the picture horizontal size is 5.0 ± 0.2 lines at left side of screen. 5. Enable digital convergence by changing DAC D0F from 1 to 0. 6. Remove lens covers.
Centering Magnets Adjustment
Procedures: 1. Apply a monoscope pattern. 2. Cover the red and blue lens so only the green lens is projecting the monoscope pattern. 3. Set DAC D0F from 0 to 1 (disabling digital convergence). 4. Loosen the deflection coil screw on the green CRT. 5. Adjust green deflection coil until the horizontal center line is in line with the grid and is leveled. 6. Adjust centering magnets until the green pattern is equal on left and right. Adjust also for horizontal and vertical tilt.
Convergence Adjustment
Note: It is strongly recommended to first read and understand the following section prior to make any adjustment.
Turn PTV on and allow it to warm up for 30 minutes prior to making adjustments (WHITE PATTERN).
Note: This PTV uses the scheme described below to correct for misconvergence of the three CRT projection tubes. There are various modes to this operation.
Preparation: Place the Convergence Alignment Template (see �Convergence Alignment Template� on page 24) over the PTV screen. Align the center lines of the template with the mechanical center markers on the PTV screen frame. If the template is not available, create one using the dimensions provided in �Convergence Alignment Template� on page 24. Remote control must be used during the procedure.
Note: Push deflection coil to top of CRT neck, then tighten deflection screw after adjusting each CRT centering and Tilt.
7. Transfer lens cover from red to green and project red only. Adjust deflection coil until the horizontal center line matches the pattern of the grid and is leveled. 8. Adjust red centering magnets until the monoscope pattern center is at the appropriate distance as indicated on Figure 34.
R G B
d
d
d measured in mm PT-51� 28 mm PT-61� 17 mm Figure 34. Centering Magnets Adjustment.
Note:
Apply the Convergence Alignment Template to the PTV screen frame to converge the Green Raster only. Remove the Convergence Alignment Template following this alignment. The red and blue rasters can then be aligned to the green raster.
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Service Manual
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