Memory; Microprocessor Memory Back-Up; Microprocessor Initialization; Memory Channel - Kenwood TM-721A Instruction Manual

4-5. MEMORY
4-5-1. Microprocessor memory back-up
A lithium battery is contained in the transceiver to retain
memory. Turning off the POWER switch, disconnecting the
power cable, or a power failure will not erase the memory.
The battery should last for approximately five years. When
the battery discharges, an erroneous display may appear in
the display.
Lithium battery replacement should be performed by an
authorized KENWOOD service facility; either your KENWOOD
dealer, or the factory, since this unit contains CMOS type cir-
cuitry.
4-5-2. Microprocessor Initialization
®@ Initial state of the microprocessor from the factory.
MAIN BAND SUB BAND
VEO 430/440 144
Memory Channel 0~9, A~d 430/440 144
CALL Channel {U.S.A version) 440 144
TM-721A only (other market} 430 144
(MHz}
® Microprocessor Initialization
When you want to erase all programmed data, or if the
display should show erroneous information, you should in-
itialize (reset) the microprocessor using the following pro-
cedure.
1. Turn the POWER switch off.
2. Press and hold the F key and turn on the POWER switch.
22
3. Release the F key; the F indicator and Memory Channel
Number *'0'' will display for approximately 5 seconds
after you release the keys.
4-5-3. Memory Channel
This transceiver provides 14 Memory Channels (0-9, A-d).
in addition to serving as a normal memory channel some of
the Memory Channels serve a dual purpose to specify other
parameters. The functions of these Memory Channels are
described below.
* Memory Channel 1 is used to store the frequency for the
Priority Alert function.
* Memory Channel A is used to store the lower fimit for
the Programmable Band Scan function.
* Memory Channel b is used to store the upper limit for
the Programmable Band Scan function.
* Memory Channel C and d are used to store odd split
repeater data.
4-5-4. Memory Contents
Each Memory Channel! is capable of storing;
Model TM-721A TM-721E
0~9, 0~9,
b C,d CALL A, b C,d
Memory Channel
Frequency data e) ie}
Tone Frequency data ie) 9)
Tone ON/OFF ie) )
O° x
(s) Xx
SHIFT status
REVERSE ON/OFF OFOJO}OJO