Bedienungsanleitung Kenwood TS-590SG (Seite 92 von 96) (Englisch)

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15 TROUBLESHOOTING

OPERATION NOTICES

The transceiver 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 80}, this

transceiver requires a supplied DC voltage source of

13.8 V ±15%. If you ﬁ nd that the transceiver cannot

be switched ON, or that it shuts OFF automatically, the

DC voltage may be outside the speciﬁ ed range.

In such a case, remove the DC cable from the

transceiver immediately and conﬁ rm that the supplied

voltage is within the speciﬁ ed range.

INTERNAL COOLING FAN

The transceiver detects the temperature of the

ﬁ nal department regardless of the transmission

and reception state of the main body, in order to

protect the internal circuits from high temperatures.

The cooling fan speed and transmission output is

controlled through the following.

• When the thermistor detects a rise in temperature

in the ﬁ nal department, the cooling fan turns on at

low speed. As the temperature rises, the speed of

the cooling fan increases.

• When an abnormally high temperature is detected,

the temperature protection circuit activates,

reducing the transmission output to the lowest

possible power.

When the temperature protection circuit activates,

return the transceiver to receive mode and leave the

transceiver power ON. Allow time for the cooling fan

to return the internal temperature to normal.

• If you turn the transceiver power OFF, the cooling

fan will not run and it will take much longer for the

internal temperature to decrease.

INTERNAL BEATS

On some spots of the receiver frequencies, 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 frequency:

• 15.600.00 MHz

• 31.200.00 MHz

• 46.800.00 MHz

AGC

When you turn the AGC function OFF {page 30}, the

receiving audio signals can be distorted. In this case,

decrease the RF gain, turn the pre-ampliﬁ er OFF, or

turn the attenuator ON. In general, the RF gain must

be greatly reduced when the AGC is turned OFF.

60 m BAND OPERATION

Effective from July 3, 2003, FCC Report and Order

(R&O) in ET Docket 02-98 granted US amateurs

secondary access to ﬁ ve discrete channels in the

vicinity of 5 MHz. General, Advanced, and Amateur

Extra licensees may use the following ﬁ ve channels

on a secondary basis with a maximum effective

radiated power of 50 W PEP relative to a half wave

dipole. Only upper sideband suppressed carrier voice

transmissions may be used. The frequencies are

5330.5, 5346.5, 5366.5, 5371.5 and 5403.5 kHz. The

occupied bandwidth is limited to 2.8 kHz centered on

5332, 5348, 5368, 5373, and 5405 kHz respectively.

The TS-590SG transceiver stops at the 60 m band

as you scroll up or down the amateur radio frequency

bands. For more information, contact ARRL or search

their Web site using the key word “60 meter”:

http://www.arrl.org

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Kenwood TS-590SG Seite 92

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