Alinco DR-635 - Manual (Page 60)

58
Maintenance / Reference
Troubleshooting
Please check the list below before concluding that the transceiver is faulty.
If a problem persists, reset the transceiver. This can sometimes correct erroneous operation.
Problem
Power is on, nothing
appears on the
Display
Display is too dim.
No sound comes
from the speaker.
The unit does not
receive.
Keys and the dial do
not function.
Rotating the dial will
not change memory
channel.
Pressing the
UP/DOWN key will
not change
frequencies or
memory channels.
PTT key is pressed
but transmission
does not occur.
Possible Causes
a. + and - polarities of power
connection are reversed.
b. Fuse is blown.
c. ACC power supply is
connected but is OFF.
Dimmer setting is "LAMP 1 - 3."
a. The volume knob is rotated
too much counter-clockwise.
b. Squelch is muted.
c. Tone or DCS squelch is
active
d. PTT key of the microphone
is pressed for transmission.
e. External speaker is
connected.
Key-lock function is activated
([ ] is on).
a. No memory is programmed.
b. The unit is in CALL mode.
a. The unit is in CALL mode.
b. Lock switch is ON.
c. Key-lock function is activated
([ ] is on).
a. Microphone terminal is not
properly inserted.
b. Antenna is not connected.
c. SHIFT is set for OFF band
transmission.
d. The unit is in SUB band
reception mode.
Potential Solutions
a. Correctly connect the red lead
and the black lead of the DC
power cable provided respectively
to the plus terminal and the minus
terminal.
b. Check and solve the problem
resulting in blown fuse and
replace it with a new one with the
same rated capacity.
c. Turn on the ACC power supply.
Make the dimmer setting "LAMP 4."
a. Set the volume knob properly.
b. Decrease squelch level.
c. Turn tone or DCS squelch off.
d. Immediately release the PTT key.
e. Remove the jack from the external
speaker terminal.
Cancel key-lock function.
a. Program memory.
b. Press V/M key for memory mode.
a. Switch to VFO mode or memory
mode.
b. Turn off the Lock switch.
c. Cancel key-lock function.
a. Properly insert the microphone
connection.
b. Properly connect the antenna.
c. Cancel SHIFT or set within the
band.
d. Switch to the MAIN band.