Cpu Resetting & Memory Backup - Yaesu FT-847 Operating Manual

CPU Resetting & Memory Backup
The FT-847's memory data is maintained, even when
DC power is turned off, via a lithium backup battery
with an estimated lifetime of approximately five years.
No data essential to the fundamental operation of the
radio is stored in "volatile" memory, so when the
battery's voltage ultimately is exhausted the transceiver
will not be disabled; you will just observe that your
memories have disappeared.
In some cases of erratic operation, it may be advisable
to reset the microprocessor to its factory default con-
dition, so as to determine whether or not a part failure
has caused improper action, as opposed to some op-
erational error.
This section describes the procedures to be used for
these situations.
FT-847 O
PERATING
M
ANUAL
M R
ICROPROCESSOR
If you wish to reset the FT-847's microprocessor to its
original factory default settings (all memories and cus-
tomized Menu settings will be lost), use the follow-
ing procedure:
•
Press the [MENU] button to activate the Menu
mode of operation.
‚
Rotate the SUB-TUNE knob to select Menu #39
("ALL INIT ").
ƒ
Press the [MCK/W] key.
„
Press the [MENU] key to exit the Menu mode.
If you only want to clear the Memory registers, use
the above procedure, but select Menu #38 ("M E M
‚
CLR") in step
above.
P
ESET ROCEDURES
97