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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.
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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!
TS-2000/X
CIRCUIT DESCRIPTION
The 118~174MHz signal distributed to the sub-receiver unit passes through a variable tuning filter and is amplified by the second amplifier (Q24). Then, it passes through the 2-pole variable tuning BPF, and the 220~300 MHz signal is amplified by Q23 and is then input into the mixer (IC5) for the sub-band common to the VHF and UHF bands. The 1pole and 2-pole BPFs for the sub-band VHF also controls the tuning frequency by the output from the D/A of the TX-RX1 unit (X57-605). The incoming signal from the UHF band antenna terminal enters the UHF section of the final unit (X45-360), passes through the HPF and LPF and goes to the TX-RX2 unit (X57605). Then, it passes through the 12dB ATT circuit and goes to the pre-amplifier (Q14). The amplified receive signal is distributed to the paths of the main and sub-receiver sections by the L distribution circuit. The signal distributed to the main receiver section passes through the 3-pole variable tuning BPF and is amplified by the second amplifier (Q21). Then, it passes through the 3-pole variable tuning BPF and is input into the mixer (IC4) for the main band. This 3-pole x 2 stage BPF for the UHF also controls the tuning frequency by the output from the D/A of the TX-RX1 unit (X57-605).
Filter X51-315 VHF ATT �12dB Final X45-360 UHF ATT �12dB L108~111,137 L116~119,133 TX-RX 2 (X57-606 A/11) D10 D22 D24 LO1RX 183.895~ 418.105MHz D9 Q14 D23 Q21 Q30 D48 XF1 IC4 41.895MHz Q42,43
Q22 D46
The 438~450MHz signal distributed to the sub-receiver section passes through the SAW filter (L29), is amplified by the second amplifier (Q25), and passes through another SAW filter (L50). The 300~438MHz and 450~512MHz signals are amplified by Q19 and goes to the mixer (IC5) for the sub-band.
� E, E2 destinations
Then, the signal passes through the 12dB ATT circuit and the 2-pole BPF (band-pass filter) and enters the pre-amplifier (Q15). The amplified receive signal is distributed to the paths of the main and sub receiver sections by the L distribution circuit. The signal distributed to the sub-receiver section passes through a variable tuning filter and is amplified by the second amplifier (Q22). Then, it passes through the 2-pole tuning BPF, and goes to the mixer (IC5) for the sub-band common to the VHF and UHF bands. The 1-pole + 2-pole BPFs for the sub-band VHF also control the tuning frequency by the output from the D/A of the TX-RX1 unit (X57-605). The signal distributed to the sub-receiver section passes through the SAW filter (L29), is amplified in the second amplifier (Q25), passes through another SAW filter (L50) and goes to the mixer (IC5) for the sub-band.
Q15
L23,24 Q24 L47,55
RIF Q61 RIF
Q38 D49 Q44 LO31 31.200MHz
X57-605
Fig. 5 Main band receiver section
Filter X51-315 VHF ATT �12dB D96 Q23 Final X45-360 UHF D97 D90 L29 Q25 L50 D91 D82
D24 D10 Q15 D22 D95 D101 L28 Q22 L44,52 D46
ATT �12dB
D9 Q14 D20 D92 D81 D23
Q19 D93
D94
TX-RX 2 (X57-606 A/11)
IC5
14
Fig. 6 Sub band receiver section
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