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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.
;
reasonable price for the schematic - the service is perfect, all as expected and pointed by instructions - good scan of the original plans - thank you!
MECHANICAL ADJUSTMENTS
Beginning Ending Audio/Control Head Maximum A B Maximum
A:B=3:2
Fig. 2-1-B 2-2: CONFIRMATION AND ADJUSTMENT OF A/C HEAD TILT When the tape is running abnormally, perform the following adjustments. 1. Insert a new tape and play it back. 2. Confirm that there is no crease on the tape between the P4 post and guide roller (R) and the tape is running smoothly. (It is absolutely impossible to get satisfactory sound if the tape is distorted between the A/C head and P4 post.) 3. If the tape still does not run smoothly, turn the screw 1 and adjust the tilt of the A/C head. (Refer to Fig. 2-2)
Drum
0.25mm
Video Tape Video Tape
Fig. 2-3 2-4: TAPE RUNNING ADJUSTMENT 1. Adjust the height of reel disk. (Refer to item 1-1) 2. Confirm and adjust tension post position. (Refer to item 1-2) 3. Adjust the guide roller. (Refer to item 2-1) 4. Adjust the A/C head tilt. (Refer to item 2-2) 5. Adjust the A/C head height and azimuth. (Refer to item 2-3) 6. Connect CH-1 on the oscilloscope to TP4001 and CH-2 to TP4002. Playback the VHS alignment tape (JG001C). Set the tracking to manual center. Adjust X with the screw driver for X (JG153) as the Fig. 2-1-A and Fig. 2-1-B. (Refer to No. 2 of the item 2-1).
Guide Roller R Tape
1
2
Audio/Control Head P4 Post
3
X Value Adjustment Driver Hole
Fig.2-2
2-3: ADJUSTMENT OF A/C HEAD HEIGHT AND AZIMUTH 1. Playback a VHS alignment tape (JG001C) and observe the waveform at the audio output terminal. 2. Turn the screw 2 slowly to change the azimuth of the A/C head. Adjust the height so that the audio output becomes maximum. (Refer to Fig. 2-2) 3. Adjust the screw 3, (Refer to Fig. 2-2) until the height of the A/C head reaches the position against the tape as shown in Fig. 2-3. 4. When the control head height is not correct. (When you must turn the screw more than 45 degrees), Turn all of the screws 1, 2 and 3 to the same degrees. Then confirm the angle of the audio/control head and adjust again.
D1-3
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