PAGE 70 AR5000 OPERATING MANUAL
(18) Trouble shooting - microprocessor
reset
Should the AR5000 fail to operate correctly, refer to the
following instructions before contacting your AOR dealer
for support.
Memory / search bank corruption
18-1, 18-2, 18-3
Set will not respond
18-1, 18-2, 18-3
PLL ERROR displayed
18-1, 18-2, 18-3
switch does not respond
18-1, 18-2, 18-3
No audio output
18-1, 18-4, 18-2, 18-3
The AR5000 may become inoperative on one or two
specific memory, scan or search banks if the data within
the EEPROM (memory storage) becomes corrupted
(power supply transients, static discharge etc). If this
happens, erase the affected memory channel or search
bank contents and rewrite the correct data. Usually this
will clear any minor corruption of this kind.
18-1 Power Off / On
The first thing to try is switching the set off and
disconnecting the power cord for about one minute.
Reconnect the power cord, switch the set on and assess
the results. If possible check the power lead for output of
12 - 16V d.c.
Press and hold the
key for more than one second
to ensure that automode has been selected, check that
the volume control has been advanced (12 o’clock
position), the squelch is set correctly (if in doubt rotate the
squelch control fully anti-clockwise) and that an appropriate
aerial is connected to the displayed aerial connector “ANT
1
1
1
1
1
” or “ANT
2
2
2
2
2
”. Ensure that LEVEL squelch, VOICE
squelch, CTCSS squelch etc are not inappropriately set.
Ensure that the DESCRAMBLER, CTCSS and 500 Hz
filter options have not been selected if the boards and
filter have not been fitted.
If you have activated the MUTE connector, ensure that
there is a shorting plug in place.
18-2 CPU reset switch
If switching the set off / on does not help, the next action
should be to reset the receiver using the hidden reset
switch provided.
The reset switch is located behind the torque lever to the
right of the
MAIN DIAL
.
1 Move the lever to the downward position, a black cloth
material covers the slot. The reset switch is located at
the top of the slot about 10mm behind the front panel.
2 Using a match stick or similar tool, press and release
the reset switch (with the AR5000 switched on and
powered in the normal manner).
3 The back light will extinguish then all LCD characters
will be displayed, the set will then power up and resume
normal operation (if it has not automatically switched on
again press the
switch).
This will re-boot the CPU without erasing the search/
memory contents or going back to the default setting. The
last entered frequency in VFO may be lost.
18-3 CPU soft reset
If the reset switch does not help, it is possible to SOFT
RESET the AR5000 CPU. This will clear all bank link
information and reset the VFO to default parameters
including frequency display of 128.900 MHz.
1 Switch the receiver off (unplug the power cord if
necessary to power-down the receiver).
2 Press and hold the
key while switching on the
receiver once again, keep hold of the
key.
3 The clock will be displayed, wait for the default frequency
/ text display to appear then release the
key.
The defaults are:
Frequency
128.900 MHz
Receive mode
AM
Tuning step
25 kHz
IFBW
6.0 kHz
Attenuator
00 dB
