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Kenwood TS-2000E Manual

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103
18 TROUBLESHOOTING
OPERATION NOTICES
The TS-2000(X)/ TS-B2000 has been designed and
engineered to avoid possible hardware glitches.
However, you may notice the following symptoms
when you operate the transceiver. These symptoms
are not malfunctions.
DC POWER SUPPLY
As stated in the SPECIFICATIONS {page 105}, this
transceiver requires a supplied DC voltage source of
13.8 V ±15%. If you find that the transceiver cannot
be switched ON, or that is shut OFF automatically,
the DC voltage may be outside the specified range.
In such a case, remove the DC cable from the
transceiver immediately and confirm that the supplied
voltage is within the specified range.
TX SIGNAL HARMONICS
The TS-2000(X)/ TS-B2000 has 2 independent
receivers. Thus, it can receive signals while you are
transmitting. Because of this, the harmonics or the
mixed heterodyne signal images of your transmission
signal can be monitored through the receiver. Even if
the TX Monitor function {page 79} is OFF, the
transmission signal may be monitored through the
speaker.
INTERNAL BEATS
On some spots of the transceiver bands, the S-meter
moves or you cannot receive any signals. This is
inevitable when you use superheterodyne receivers.
You may notice the signals on the following spots of
the bands.
On the main transceiver:
51.259 MHz, 430.151 MHz, 432.209 MHz,
436.799 MHz, 439.298 MHz, 442.440 MHz
(K-type only), 1247.999 MHz, and 1269.387 MHz.
When the sub-receiver frequency is 144.000 MHz:
146.663 MHz (K-type only) and 436.249 MHz.
When the sub-receiver frequency is 440.000 MHz:
437.333 MHz and 444.315 MHz (K-type only).
Note: When the sub-receiver frequency changes, the above beat
frequencies may be changed accordingly. In this case, turn the
sub-receiver OFF to remove the internal spurious signals.
On the sub-receiver:
144.490 MHz, 144.945 MHz, 430.150 MHz,
436.210 MHz, 436.800 MHz, 442.020 MHz
(K-type only), 449.400 MHz (K-type only) and
429.050 MHz (K-type only).
VISUAL SCAN
When you have the same VHF band or UHF band
for both the main transceiver and the sub-receiver,
the Visual scan may indicate the signals on the
bar-graph display even if no signal is monitored on
the main transceiver. This error occurs due to the
internal spurious harmonics that are generated by
the sub-receiver. Refer to “INTERNAL BEATS”,
above, for the frequencies.
SENSITIVITY (K-type only)
While the main transceiver is receiving on the VHF band
(142 ~ 152 MHz), the sensitivity of the main transceiver
slightly degrades when you select 118 ~ 136 MHz or
155 ~ 300 MHz for the sub-receiver.
AGC
When you turn the AGC function OFF {page 38}, the
receiving audio signals can be distorted. In this case,
decrease the RF GAIN, turn the pre-amplifier OFF, or
turn the attenuator ON. In general, the RF GAIN is
greatly reduced when the AGC is turned OFF.
SUB-RECEIVER
When you turn the sub-receiver ON or OFF, a
popping noise may be monitored from the speaker.
… 111 …


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