Troubleshooting - Alinco DX-SR8 Instruction Manual

Chapter 7 Maintenance

7.5 Troubleshooting

If a problem should occur, fi rst try the troubleshooting procedure given below. If the problem
persists, contact your nearest ALINCO dealer for technical assistances.
Symptom
Power does not
come on.
LCD display related
troubles.
No sound from
speaker.
Only strong signals
are received.
Received signal is
not demodulated.
No frequency
change when
rotating the main
tuning dial.
Scan does not start. 1. Scan setting is incorrect in the Set mode
88
Possible Cause
1. DC power cable is incorrectly
connected.
2. Fuse is blown.
3. Plug polarity is wrong.
4. Power switch of DC regulated power
supply is off.
5. Voltage from the power supply is
insuffi cient.
1. Power supply voltage is low. To
transmit at 100 W output, the power
supply must be capable of supplying 30
Amps continuously at 13.8 V DC.
2. No illumination.
1. AF control knob is turned fully
counterclockwise.
2. [PTT] key of microphone is on.
3. Telegraph key is in transmission.
4. External speaker cable is short-circuited
or damaged.
5. Headphones or earphone is plugged
into the speaker jack.
6. Squelch level is set too high.
1. Squelch is muted.
2. ATT is on.
3. Defective antenna or short-circuited or
damaged coaxial cable.
4. Antenna is not suitable for reciving
band.
1. Wrong mode is set. (If SSB, also check
LSB and USB)
2. Wrong passband is set.
1. Dial is locked.
or squelch is unmute.
Remedy
1. Correctly connect cable.
2. Replace fuse. (page 86)
3. Correct polarity and replace fuse.
4. Turn power switch on.
5. Supply a regulated 13.8 V DC ± 15 %
1. • Check that DC regulated power
supply is used.
• Adjust the operating voltage within
a range of 13.8 V DC±15 % (11.7 to
15.8 V DC).
2. Check the Set mode's dimmer setting
(P.76)
1. Rotate AF control knob to adjust
volume. (page 25)
2. Release [PTT] key. (page 33)
3. Stop keying with telegraph key. Also
check that cable plug is not short-
circuited.
4. Check cable.
5. Unplug headphones or earphone. (page
14)
6. Turn SQL control knob
counterclockwise to unmute squelch.
(page 25)
1. Turn SQL control knob
counterclockwise. (page 25)
2. Press [RF] key to turn ATT off. (page
31)
3. Check antenna, cable, and connector.
(page 13)
4. Connect correct antenna.
1. Press the mode key (page 26) to
select a correct mode.
2. • Turn IF control knob to a position
where proper audio can be heard. (page
62)
• Select proper fi lter. (page 63)
1. Press [ ] key to free dial. (page 68)
1. Correct the scan type (p.74) or mute the
squelch.