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Thanks for offering this item at such a good price. Proved handy in identifying the part I was looking for my set.
Thanks again.
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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
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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
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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.
Alignment and Adjustments
4-3 CD
4-3-2 To Adjust Tracking Gain (PLAY mode)
1. 2. 3. Connect the GND terminal of the oscilloscope to Vref and (+) terminal to TP2. Load and play the disc While the disc is running adjust the gain with NVR1704 as shown below. Normal frequency Low frequency High frequency
---0 V
---0 V
---0 V
TE CENTER FE CENTER E.F BAL F.BIAS
NVR1704 NVR1703 NVR1702
NVR1701
VOLT/DIV : 0.2V TIME/DIV : 2mS
VOLT/DIV : 0.2V TIME/DIV : 2mS
VOLT/DIV : 0.2V TIME/DIV : 2mS
Vref
4-3-3 To Adjust Focus Gain (PLAY mode)
1. 2. 3. Connect the GND terminal of the oscilloscope to Vref and (+) terminal to TP1. Load and play the disc While the disc is running adjust the gain with NVR1703 as shown in the following figure. Normal frequency
TP1
---250mV
Low frequency
High frequency
TP2
---100mV ---0 V ---0 V
---100mV ---0V
VOLT/DIV : 0.1V TIME/DIV : 2mS
VOLT/DIV : 0.1V TIME/DIV : 2mS
VOLT/DIV : 0.1V TIME/DIV : 2mS
4-3-4 To Adjust E/F Balance (PLAY mode)
1. 2. 3. Set TIME/DIV of the oscilloscope to 2mS. Set Volt/DIV of the oscilloscope to 0.5V. Ground the scope input and set to DC and then set the DC range. Connect the GND terminal of the oscilloscope to Vref and (+) terminal to center to TP2. Load and play the disc. Turn NVR1704 counterclockwise to the minimum value. Raise NVR1702 and adjust the waveform so that its middle comes to GND of the oscilloscope (or until the upper half of waveform becomes symmetrical to the bottom half, A=B) Adjust NVR1704 (arrow) for normal sound.
4-3-1 To Adjust FOCUS BIAS(STOP mode)
1. 2. 3. 4. Set Volt/Div of the oscilloscope to DC 100mV. Ground the scope input and set the waveform to 0V, DC range. Connect the GND terminal of the oscilloscope to Vref, and (+) terminal to center of TP1. Set NVR1701 to 0mV. 5. 6. 7. 4.
0V A
B
A=B
8.
4-4
Samsung Electronics
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