Icom IC-R8500 Troubleshooting, Power Receive Functions Front Panel Control, Problem, Solution

13 TROUBLESHOOTING

The following chart is designed to help you correct problems which are not equipment malfunctions. If you are unable to locate the cause of a problem or

solve it through the use of this chart, contact your nearest Icom Dealer or Service Center.

POWER

RECEIVE FUNCTIONS

FRONT PANEL CONTROL

PROBLEM	POSSIBLE CAUSE	SOLUTION		REF.
Power does not turn	• DC power cable is improperly con-	• Reconnect the DC power cable se-		p. 8
ON when [POWER] is	nected.	curely.
pushed in.	• A fuse is blown.	• Check for the cause, then replace the		p. 37
		fuse with a spare one.
	• During AC adapter operation, the	• Connect the jumper connector to the		p. 8
	jumper connector is not in use.	[DC13.8V] jack on the receiver’s rear panel.
	• External 12 V DC is connected to the	• Connect the external power source to		p. 8
	[DC IN] jack.	the [DC13.8V] jack. The [DC IN] jack ac-
		cepts an AC adapter (AD-55/A/V) only.
Receiver turns OFF by	• The sleep timer has been activated.	• Turn power back ON, then push		p. 29
itself.		[SLEEP] one or more times to turn the
		sleep timer function OFF, if desired.
No sound comes from	• Volume level is too low.	• Rotate [AF GAIN] clockwise to obtain a		—
the speaker.		suitable listening level.
	• The squelch is closed.	• Rotate [SQUELCH] counterclockwise to		p. 14
		open the squelch.
	• An external speaker or headphones are	• Disconnect the	external speaker or	—
	connected.	headphones.
	• CW narrow mode is selected when no	• Select another mode or install the op-		pgs.
	optional filter is installed.	tional CW narrow filter.		13, 38
Sensitivity is low.	• The coaxial cable is cut.	• Fix the coaxial cable.		—
	• No antenna is connected.	• Connect an antenna.		p. 8
	• The connected antenna is not matched	• Connect an antenna matched to the re-		p. 8
	to the receive frequency.	ceiving frequency.
	• Wrong antenna connector is used for	• Check the antenna connection.		p. 8
	V/UHF and HF antenna.
	• Wrong antenna connector is selected in	• Select the proper antenna connector:		p. 31
	set mode for HF antenna.	SO-239 or phono (RCA).
	• An RF attenuator is activated.	• Push [ATT 10 dB] or [ATT 20 dB] to can-		—
		cel the function.
Receive signal is un-	• [IF SHIFT] is rotated too far CCW or	• Set [IF SHIFT] to the center position.		p. 14
clear or distorted.	CW.
	• [APF] is rotated too far CCW or CW.	• Set the [APF] control to the center position		p. 15
		or push the [APF] switch to turn it OFF.
	• The wrong mode switch is pushed.	• Push the correct mode switch.		p. 13
WFM mode cannot be	• The operating frequency is lower than	• Set the frequency above 30 MHz when		p. 13
set.	30 MHz. (WFM mode cannot be se-	in WFM mode.
	lected below 30 MHz.)
Main dial does not func-	• The lock function is activated.	• Push [LOCK] for 1 sec. to deactivate.		p. 12
tion.
[LOCK] does not lock	• DIAL LOCK is selected in quick set	• Select PANEL	LOCK in quick set	p. 31
the keypad, function	mode.	mode.
switches, etc.
The selected frequency	• The memory channel was changed be-	• Push [MW] for 1 sec. to write into a		p. 19
is erased.	fore writing into memory.	memory before changing channels.
The frequency is not	• An optional UT-102 VOICE SYNTHESIZER	• Install the UT-102.		p. 38
announced when push-	UNIT is not installed.
ing [SPCH].

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