Maintenance; 6-L Repeater Disasse'hnbly' ; . : ,I; Fuse Replacement; Backup Battery - Icom C RP1520 Instruction Manual

MAINTENANCE

6-1 REPEATER DISASSEMBLY
WARNING: DISCONNECT the AC power cable from
the repeater before performing any work
on the repeater.
1) Turn the [POWER] switch OFF
2) Disconnect the AC power cable.
3) Unscrew 6 screws from rack mounting handles and
remove the rack mounting handles.
4) Unscrew 3 screws from each side of the front panel.
5) Unscrew 12 screws on top and bottom covers
6) Remove top and bottom covers.

6-2 FUSE REPLACEMENT

If the fuse blows or the repeater stops functioning, find
the source of the problem if possible, and replace the
damaged fuse with a new, rated fuse.
2 fuses are installed in the repeater:
-Rear panel AC line fuse holder 3A
-Rear panel DC line fuse holder 10A

6-3 BACKUP BATTERY

The repeater has a lithium backup battery installed. The
usual life of the battery is approximately 5 years. If the
battery is exhausted, transmitting and receiving normal-
ly but ID information in the RAM IC chip is not retained
each time the power is turned ON.
NOTE: Backup battery replacement should be done
by an authorized lcom Dealer or Service Cen-

6-4 CLEANING

If the repeater becomes dusty or dirty, wipe it clean with
a dry, soft cloth. Avoid the use of strong cleaning agents
such as benzine or alcohol as they may damage the
surfaces of the repeater.
6-5 CPU RESEl-I-ING
The repeater may occasionally operate erroneously,
e.g., when first applying power. This may be caused
externally by static electricity or other factors.
If this problem occurs, turn the [POWER] switch OFF.
Wait a few minutes, and then turn ON power again. The
CPU has been reset.
CPU resetting can be remotely controlled by a control
operator using DTMF signals. The DTMF signals must
be sent as follows:
1) Transmit "*" signals twice as the preamble.
2) Transmit your 4-digit password
3) Transmit "D" signals once and "9" signals twice as
the command and data for CPU resetting.
4) Transmit "#" signals twice as the postamble.
The CPU has been reset. The operating frequency
adjustment (+ l- f 7 position) and ID function are not
reset.
CAUTION: CPU resetting clears all information. The
repeater is set to initial conditions.
Composition of the DTMF control signals for CPU resetting
@preamble
@password
@command