Icom IC-R8500 Maintenance, Disassembly, Fuse replacement, Level adjustments, Memory backup

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.

➀Remove 6 screws from the top of the receiver and 4 screws from its sides.

➁Carefully lift up the top cover while disconnecting the plug from the speaker cable.

➂Turn the receiver upside down.

➃Remove 6 screws from the bottom cover, then lift up the bottom cover.

Speaker cable

■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	• For internal fuse
	Fuse	MAIN unit
	(FGMB 125 V 3 A)

■Level adjustments

R254

R252

R252 adjusts the beep level

R254 adjusts the UT-102 output level

■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.

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