Maintenance; Disassembly; Fuse Replacement; Level Adjustments - Icom IC-R8500 Instruction Manual

11

MAINTENANCE

Disassembly

For internal maintenance and optional installations,
disassemble the receiver.
CAUTION:
DISCONNECT the DC power cable
or AC adapter before performing any work on the
receiver.
Remove 6 screws from the top of the receiver and
4 screws from its sides.
Carefully lift up the top cover while disconnecting
the plug from the speaker cable.
Turn the receiver upside down.
Remove 6 screws from the bottom cover, then lift
up the bottom cover.

Fuse replacement

If a fuse blows or the receiver stops functioning, try to
find the source of the problem, and replace the dam-
aged fuse with a new, rated fuse.
• For DC cable fuse

Level adjustments

R254
R252 adjusts the beep level
R254 adjusts the UT-102 output level
37
• For internal fuse
MAIN unit
Fuse
(FGMB 125 V 3 A)
R252

Memory backup

All of the CPU's memory is backed up by an EEP-
ROM (Electronically-Erasable Programmable Read-
Only Memory). All data you set, such as memory con-
tents, set mode contents, etc. is stored in this EEP-
ROM. There is no internal lithium battery.

CPU resetting

If the IC-R8500 is behaving erratically, this may be an
indication of a CPU malfunction. In such cases, reset
the CPU.
While pushing [MW], push [POWER] in to turn on the
receiver power.
• The CPU is reset.
NOTE: Resetting the CPU clears all memory con-
tents and returns internal settings to their factory
defaults.

Cleaning

If the receiver becomes dusty or dirty, wipe it clean
with a dry, soft cloth.
AVOID the use of strong chemical solvents such as
thinner, benzine or alcohol to clean the
receiver. These may damage the receiver's
surfaces.
Speaker
cable