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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!
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Manual was just as described!!! I odered it and in less than a day was able to download it and the text was clear and pages were all complete just as the original manual was. Purcashed this for a friend and they were more than happy. Perfect all around!
BE-4140
6. ADJUSTMENT
Perform this adjustment more than 30 minutes after the power is turned on.
7 Equipment used
� � � � � � Spectrum analyzer Oscilloscope Digital voltmeter Video SG Variable resistance attenuator Audio analyzer
BE-4140
DPS Assy
+5V (D) 1 D.GND 6
� FM linear detector � C.W.Signal Generator
Digital Voltmeter
VR1
6.1 DC5V Adjustment
1. Connect the digital voltmeter to CN1004 pin 1 [+5V (D)] and pin 6 [GND (D)] of the DPS ASSY (Connection Diagram 1). +0.02 2. Adjust VR1 of the POWER unit, set to 5.00V - 0.01V
CN1004
POWER Unit
Connection Diagram 1
6.2 Adjustment of DPS ASSY (Video SCR ASSY)
� If deviation of the time axis occurs on the oscilloscope screen, or to move the screen to have a better view, perform fine adjustment using a delay. However do not change the ranges of the vertical and horizontal axes. � When reading the waveform on the oscilloscope screen, read the center of the waveform noise. � If the signal waveform on the oscilloscope is difficult to read, adjust the luminance.
DPS ASSY
VIDEO IN CN3001 (J1001)
VR1004 (RV1004) VIDEO OUT CN3002 (J1002) VR1003 (RV1003) IC1021 IC1020
6.2.1 Adjustment of video output pedestal potential
1. Connect the equipment as shown by the dotted lines in Connection Diagram 2. 2. Set the equipment as shown below. a. Oscilloscope 0.1V/div (DC mode) 5µs/div H-SYNC TRG. b. Video SG Staircase signal (1 Vp-p/75�) 3. Set the oscilloscope to the GND mode, and adjust the oscilloscope so that the luminance line is at the center of the oscilloscope. 4. Connect the equipment to the CN3002 (J1002) of the DPS ASSY using a tool as shown by the lines in Connection Diagram 2. 5. Set the unit to the STANDBY mode. The other functions can be set as desired. 6. Set the oscilloscope to the DC mode, and adjust VR1004 (RV1004) in the DPS ASSY so that the pedestal potential of the video waveform satisfies the GND potential set at step 3 (within 0±0.02V).
VIDEO SG
FL1002 IC1016
VR1001 (RV1001) CN1007
Fig.1 Adjustment Locations
BE-4140 Video in DPS ASSY CN3001 (VIDEO SCR ASSY) (J1001) VR1004 (RV1004)
Video out CN3002 (J1002)
OSILLOSCOPE
Staircase signal 1Vp-p/75�
Terminated at 75�
Connection Diagram 2
47
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