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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.
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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.
PIF/AFT/AGC � DIGITAL COMB FILTER Y LEVEL ADJUSTMENT
3. AFT T204 DC voltage at TP201 [ Pin (1) of IC201] 1. DIGITAL COMB FILTER Y LEVEL ADJUSTMENT: R5467
6V this is not available, any signal above the level 1.0 Vp-p ± 0.05Vp-p).
Receive E-12CH (PAL signal. If 1. Input the PAL bar (100% white colour bar) signal to AV-IN terminal with a 75 ohm termination (input
E-5CH band is acceptable. 2. Connect the oscilloscope to TP5462 (pin (7) of connector YA). � Field strength: 55~80 dBµV 3. Adjust R5467 so that the Y signal (100% white) at TP5462 be 2.0 ± 0.1Vp-p. Make sure frequency is almost the same as 3.3V of received channel (± 30 kHz). Note: Make sure that the signal is linearly amplified overall. (The 100% portion should be kept intact.)
2. Using the channel setting control, make a fre-
quency of 224.25 MHz appear on screen. <Reference> Note voltage level for adjustment with the E-12CH signal. (AFT off)(If any other channel than E-12CH is To be adjusted to 2.0 Vp-p at TP5462 received, make its frequency on screen.) * Make sure above value is available after the adjustment No. 5. (See Page 12.)
DOWN A B' B B'' C UP
3. Turn T204 coil clockwise first to have 6V readInput (YB) (2): 2.0 V ± 0.1 Vp-p
ing and then counterclockwise to get 0.2 readOutput (YA) (7): 2.0 V ± 0.1 Vp-p Fig. 3 ing. * Turn core counterclockwise for UP diWithin range, adjust this coil to reach the volt-
� SOUND ADJUSTMENT
B' B''). Point A and C are rejectable.
rection, and clockwise for the DOWN direcage below. tion. Adjust the T204 core to point B (between 4. Adjust T204 so that DC voltage at the pin (1) of IC201 be 3.3 ± 0.2 V. (See Fig. 3.)
2
1. SUB SOUND ADJUSTMENT (I C bus adjustment)
0.04/-0.06 Vp-p 2. Set the volume control to MAX. 3. Connect VTVM probe to the S1 connector. (Pin 1: L-ch, 2: GND, pin 3: R-ch)
TV Set 4. Adjust sub-sound data so that VTVM should read following voltage. For the left channel. Fig. 4. Oscilloscope
4. RF AGC CUT-IN ADJUSTMENT: R226 1. Feed following signal to the AV terminal. Signal: 1 kHz, 1.76 Vp-p (terminated with a 10k ohm impedance),
1. Receive the E-12CH (PAL colour bar) signal.
� Field strength: 57 ± 1 dBµV (75 ohms open) Adjustment error: 8.0 ± 0.1 Vrms
2. Connect the oscilloscope to P201, as shown in
P201 Notes:
7
0.1V 3. Turn R226 to have the highest voltage.
� Bias box: About 6.5V
4. Turn R226 slowly in the opposite direction until
voltage goes down 0.1V below the highest level.
5. Adjust the signal level to 63-67 dBµV and make
Bias box 6. Now adjust the signal level to 90-95 dBµV and
� Spatializer off � In the S-Normal mode � S-VOL control at MAX position * Use an 8 ohm dummy load.
sure there are no noise.
2. NOISE MUTE CHECKING make sure there is no chrominance modulation +
1. Receive E-12CH "PAL colour bar" signal. 2. Turn up volume control to maximum and make sure sound is heard from speakers. Then put the unit in the no-signal state. 3. Be sure that the sound mute is effective.
beat.
Note: If a 50 ohm field strength meter is used with-
Fig. 4 4. Finally turn down the volume control minimum.
out a 50/75 impedance converter, set the field strength 55 ± 1dBµV. Pay attention to a loss that would be cause with the converter.
5. VIDEO DETECTION LEVEL ADJUSTMENT: R224
1. Receive "B/G SYSTEM PAL COLOUR BAR" signal (100% white colour bar). Set the S system to B/G. 2. Adjust R224 so that video output at the AV OUT terminal be 1.0 ± 0.05 Vp-p with a 75 ohm termination.
SX80J7
7-1 7-2
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