Specifications

SG-2000 MANUAL 143
The SGC Building, 13737 S.E. 26th St. Bellevue, WA. 98005 USA
©1995, SGC, Inc. TEL: [phone] FAX: [phone]
22.0 Trouble Shooting
22.1 Dysfunctions
1. In the event you experience a failure of either output section of the
LPA (Linear Power Amplifier), it is probable that the output
combiner transistor (R-21) will also fail and need replacement to
restore proper operation.
2. Over/Under voltage protection is included in the SG-2000. In the
event the unit fails to operate, and you believe power is supplied,
but the STBY (standby) light is not lit, please measure the power
supply for proper voltage and polarity.
3. If you are operating and the TEMP light comes on after extended
voice operation, insure that the antenna system which is used is
presenting a reasonable load to the radio. The SG-2000 is
normalized at 50 ohms and will operate satisfactorily up to 2:1 SWR
levels. Beyond this, power output is reduced and the radio runs
hotter, increasing the likelihood that a TEMP light will come on.
4. If you hear no audio coming out of the speaker of the SG-2000 make
sure that SQL is off and that the SPK (speaker) is indicated on the
front panel. Remember the external speaker jack on the rear panel
of the SG-2000 is active only if the radio has a control head attached
to the body of the radio.
• If you are wondering if the SG-2000 is working in the receive mode,
remember that you can usually hear traffic by tuning across the
bands. We suggest you listen to WWV, the international time and
frequency standard which broadcasts 24 hours a day on 5, 10, 15,
and 20 MHz. You should be able to receive this station on one or
more frequencies at all times.
• If you are using the SG-2000 with the SG-230 Smartuner, remember
that the Smartuner will only pass signals near the band the coupler
is being used on, unless you have selected Jumper J-2 on the SG-230
to the "Yes" option, which bypasses all active tuning elements in the
receive mode or the coupler has been reset by interrupting power
momentarily.
5. If you are not answered by stations in the CW mode, remember the
tone of the station you are listening to must be the same as the
sidetone of the SG-2000 BEFORE USE OF CLARIFIER. Make tone
adjustments using clarifier AFTER you have set your transmit