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This is the original manufacturers service manual, with detailed info on the circit boards, explosion drawings of all parts in assembly order, and tuning instructions. The only thing missing is the information on the dimensions of the various drive belts. mail me if you need them. gcrossman_at_aol.com
Ordered service manuel for a hard to find plasma tv - your company made it easy to find and purchase - I will use you again
Thanks for your help
This is a high quality manual with clear schematic and components layout diagrams ; with service procedure included.
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.
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.
SECTION 5 ADJUSTMENTS
Precautions for Adjustment 1. Before beginning adjustment, set the equipment to service mode. After the completion of adjustment, be sure to reset the service mode. For more information, see âService Mode (service program)â on page 8. 2. Perform adjustments in the order given. 3. Use the disc (YEDS-18. Part No. 3-702-101-01) unless otherwise indicated. 4. Power supply voltage requirement : DC 4.5 V HOLD switch : OFF VOLUME : Minimum BASS BOOST switch : NORM AVLS switch : OFF Before Beginning Adjustment Set the equipment to service mode (See page 8) and check the following. If there in an error, repair the equipment. â¢ Checking of the sled motor 1. Open the upper panel. 2. Press the + and = keys and check that the optical pick-up can move smoothly without sluggishness or abnormal noise from innermost periphery to outermost periphery then to innermost periphery. + : The optical pick-up moves outwardly = : The optical pick-up moves inwardly â¢ Checking of focus searching 1. Open the upper panel. 2. Press the ^ key. (Focus searching operation is activated continuously). 3. Check the object lens of the optical pick-up for smooth up/down motion without sluggishness or abnormal noise. 4. Press the p key. Check that focus searching operation is deactivated. If not, again press the p key slightly longer.
Focus Bias Check Condition : â¢ Hold the set in horizontal state. Procedure : [MAIN BOARD] (Side B)
oscilloscope (AC range) 2k â¦ IC501 @Â£ pin (RFO)
IC501 #Âº pin (VC)
1. Set the equipment to service mode stop state (See page 8). 2. Connect the oscilloscope between IC501 @Â£ pin (RF0) and #Âº pin (VC) on the MAIN board. 3. Move the optical pick-up by Pressing the + and = keys. 4. Put the disc (YEDS-18). 5. Press the ^ key. From focus searching, focus is turned ON while entering CLV drawing-in mode. Tracking and sled are turned OFF.
6. Press the PLAY MODE key. (Both tracking and sled are turned ON). 7. Check the oscilloscope waveform is as shown below. A good eye pattern means that the diamond shape (â) in the center of the waveform can be clearly distinguished.
RF level 0.85 â 1.15V
â¢ RF Signal Reference Waveform (eye pattern) To watch the eye pattern, set the oscilloscope to AC range and increase the vertical sensitivity of the oscilloscope for easy watching. 8. Stop removing of the motor by pressing the p key. 9. After the completion of adjustment, reset service mode. (See page 8 )
Complete owner's manual in digital format. The manual will be available for download as PDF file aft…