Question about Audio Players & Recorders

1 Answer

Sony Dream Machine clock radio

My alarm clock/radio, though an older model, is working. However, last evening it started making noises in the middle of the night. These noises sound like static though the radio was off. I can't locate any information on it. Any ideas or is it time for a new clock radio? (Sony Dream Machine ICF C370)

Posted by on

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that gotĀ 5 achievements.

    Novelist:

    An expert who has written 50 answers of more than 400 characters.

    Governor:

    An expert whose answer gotĀ voted for 20 times.

  • Expert
  • 150 Answers

0) Read the last answer first :) it is the most likely.

1) Make sure that the noise is electronic, not mechanical,

a) Electronic noise comes from the speaker

b) Mechanical nose originates in the clock
(older mechanical clocks only)

c) Clocks come in 3 varieties:
Electronic
Mechanical "Flip Leaf"
Mechanical "Motor/ Gear" driven.

2) Assuming that your clock is electronic, there are
only two possibilities for causing static.

a) Extremely intense electromagnetic interference,
as in radio waves, from a thunderstorm or a powerful
transmitter nearby, such as a HAM radio or even
an active cell phone.

Intense electro-magnetic waves can be picked up by
internal wires within the radio which act as an antenna,
rectified (demodulated) by internal diodes and transistors,
filtered by internal capacitors and the speaker's inertia,
and still present enough audio frequency energy to the
sensitive speaker coil to be "quite" audible and irritating.

This can happen even with the power off, when the
interference is so strong that it needs no amplification !

This happens to my computer speakers, every time my
cell phone rings, and starts transmitting a return signal.


3) The power switch is intermittently shorting causing a small
amount of DC power to enter the radio, the more intermittent
the switch, the more noisy it gets.

This causes my old clock radio to turn on by itself when its
not supposed to.

The cause of the problem in either in the main power/ mode
switch, or in the clock driven switch or relay.

4) Old switches and volume controls get oxidized with time
and/or bridged by products of corrosion. The simple solution
is to clean them using a good aerosol contact cleaner,
available from an electronic shop for about 10 bucks.

Simply spray the cleaner into all the switches and controls,
while vigorously exercising each switch or control back and forth.

Make sure that you use a safe "electronic cleaner" designed
for the job. It must be safe on plastics, non-conductive, good
solvent and it must evaporate quickly. Don't breath the stuff !!!

Typically the spray will contain TF (tri-fluoro-ethane), or some
other freon substitute.

Freon (Di-fluoro-di-chloro methane) is bad for the ionosphere,
now illegal in most countries for that reason.

Also stay away from Carbon-Tetra-Chloride, which is
VERY toxic.

Do NOT improvise, or use acetone or alcohols, which may (will)
melt the plastic, causing the controls to permanently seize.

Get electronic contact cleaner from an electronics hobby shop.

Good luck. Martin
Please rate my answers.


Posted on Jul 12, 2008

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

How do I get the alarm to work? I set the alarm for 5am, it did not go off. The sound is off, I have the volume to the highest point, nothing comes out.


Make sure it's on the correct am/pm. Also, make sure that it's not set to radio, or auxiliary, or anything. If it's still not working, I would try to return it.

Mar 09, 2015 | Sony ICF-C318 Dream Machine Alarm Clock...

1 Answer

Sony dream machine clock / radio model ICF-CS750 is suddenly and randomly blurring out squelch and interference ? It can be in the middle of the night sometimes. The alarm still works when it should at...


some of these machines needs a ups i mean backup power supply. if have a loss of power for 2 seconds time adjustment should be done. check your device if no power will save the time and the alarm settings?

Nov 15, 2013 | Audio Players & Recorders

1 Answer

Sony dream machine


Hello
Send your Email Address to me by FixYa comment box. I've the user manual to your clock radio. I can't send it to you by this window as it does not allow me to upload PDF files by it. If you send your Email ID to me, I'll send a copy of it to you by return mail. OK.

Nov 17, 2011 | Sony Icfc8wm Dream Machine Alarm Clock...

1 Answer

We bought a used model for which there is no Manual. It is a clock radio and the alarm goes off in the middle of the night. We need to know how to control it.


I had a rooster like that once.
Shot him.
Worked for me!.
and with no information whatsoever as to the make/model of the mystery clock you own, that's the only advice I can give with regards to troubleshooting...it's giving you trouble...shoot it!

Feb 28, 2011 | Audio Players & Recorders

1 Answer

My am radio makes static noise from other apliances.


Hello

Yes, this is a grounding problem, had the same problem with one of my older devices.

Best Regards
Andrea

Nov 03, 2009 | RCA Alarm Clock w/CD Player, AM/FM Stereo...

Not finding what you are looking for?
Audio Players & Recorders Logo

Related Topics:

1,280 people viewed this question

Ask a Question

Usually answered in minutes!

Top Audio Players & Recorders Experts

kakima

Level 3 Expert

102366 Answers

 Grubhead
Grubhead

Level 3 Expert

4853 Answers

The Knight
The Knight

Level 3 Expert

72640 Answers

Are you an Audio Player and Recorder Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...