Question about Emerson CKA1000 Clock Radio

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Lost time display

In the last couple of months my several year old unit has been constantly been losing its time display showing instead "ZONE". When reset it shows the correct time for a couple of hours at most, then reverts to the "ZONE" display. (This unit has worked perfectly for several years and has not been moved or changed.) How can this problem be resolved?

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  • bel51rpa Jun 22, 2008

    What is thew recommended replacement for the Emerson CKA1000 Clock Radio.

  • coachb02 Sep 07, 2008

    My Emerson clock had the same problem. Worked great for years, then it could never be kept displaying the time; it kept cycling back to ZONE.

    I'd like to know: is there a way to switch this clock to "manual" mode where it doesn't listen for a signal? I'd like to keep this as a regular manually set clock.



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  • Master
  • 934 Answers

The electrolytic cap responsible for hold the information locked in the eprom has most likely failed or is reading so high an equivelent series resistance as to be useless. That, and probably several others need to be changed out. Radial caps in a circuit, commonly referred to as lytics, act like a battery storing up electricity and dispensing it at a proper rate in their given circuit. After time the oil like fluid in them begins to deteriorate and the lytic breaks down becoming less able to function. Some simply open and this circuit collapses. But others, like the problem you have here, slowly die off and are not able to dispense voltage at a rate necessary to keep the charge across the gate of the IC storing the info you just programmed into it.. So, in laymen's terms it needs to go to the shop and have a few caps tested... Not an expensive proposition so I'd clearly recommend having it repaired. To do this yourself you would need at a minumum an ESR meter, which is more expensive than the repair will cost you... Hope this helps. Bill

Posted on Jun 07, 2007


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Posted on Jan 02, 2017


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How to set time

Plug in the unit.
First, the month and date appear, then the
year, and then the current Eastern Standard/
Daylight Time appears in the display.
Area number "2" appears in the display.
If you live in the Eastern Time zone, you do
not need to adjust the area setting.
Area number
Time zone
Atlantic Standard/
Daylight Time
Eastern Standard/
Daylight Time
Central Standard/
Daylight Time
Mountain Standard/
Daylight Time
Pacific Standard/Daylight
Yukon Standard/Daylight
Hawaiian Standard/
Daylight Time
repeatedly until the
desired number appears.
The display returns to the clock about 4
seconds after the operation is complete.
During the shipment and your first use, a clock
error may occur. In this case, refer to "Setting the
clock and date" to set the correct time.
When daylight saving time
(summer time) begins
This unit employs Automatic Daylight Saving
Time/Summer Time adjustment. The DST
indicator appears in the display at the beginning
of the daylight saving time (summer time), and
disappears at the end of it.
Daylight saving time begins at: 2:00 AM on the
second Sunday of March.
Standard time begins at: 2:00 AM on the first
Sunday of November.
To cancel the automatic DST/summer
time adjustment and to set DST display
The automatic DST/summer time adjustment can
be cancelled.
Press and hold
for at least 3 seconds while
the clock is displayed.
A beep sounds, and "Aut
OFF" appears in the
display to show that the automatic DST/summer
time adjustment is cancelled. The display returns
to the clock.
Daylight Saving Time depends on the law in
each country/region, and your area may not use
it. In such a case, cancel the automatic DST/
summer time adjustment before using the set
and set the time manually as necessary.
To activate the automatic DST/summer time
adjustment again, press and hold
for at
least 3 seconds. A beep sounds, and "Aut
On" appears in the display to show that the
automatic DST/summer time adjustment is
activated. The display returns to the clock.
To change the display to the daylight saving
time (summer time) manually, see "To change
the display to the daylight saving time (summer
time) indication."
Setting the clock and
To change the setting manually, follow the
procedure from step
for at least 2 seconds.
You will hear a beep and the year will start to
flash in the display.
until the correct year
appears in the display.
Repeat steps
to set the month,
day and time.
After setting the time, two short beeps sound
and the clock starts from 0 seconds.
Pressing and holding
changes the year,
month or day rapidly.
When setting the current time, time changes
rapidly by 1 minute-increments up to 10
minutes, and then by 10 minute-increments.
While setting the clock, you must perform each
step within 65 seconds, or the clock setting
mode will be cancelled.
To display the year and date
once for the
date, and within about 3 seconds press it again for
the year.
The display shows the date or year for about 3
seconds and then changes back to the current
If you connect the AC plug to an AC outlet while
this unit is powered from the backup power
source, the current date and time appears in the
following order (the same as when the unit is
powered on after a power interruption).
"month and date" (about 1 second)
(about 1 second)
"current time"
To change the display to the daylight
saving time (summer time) indication
Change the daylight saving time (summer time)
adjustment setting according to the following
procedures if you have cancelled the automatic
DST/summer time adjustment.
The DST indicator appears in the display and the
time indication changes to the daylight saving
time (summer time).
To deactivate the daylight saving time (summer
time) adjustment, press

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1 Answer

Directions for Resetting the Daylight Savings Time (DST) Start & End Dates on the Emerson Research Smartset Dual Alarm Clock Radio on CKS1850

Unfortunately, you can't reset the firmware of the clock for those built before Jan 2006; you can work-around the issue. You will need to change time zones for the few weeks between the current daylight savings start and end dates and the ones that were built into the clock. For details see: ; click on the link for Group 1.

If the unit was built before Jan 2006 (the serial number will start with a value less than 6), switch the time zone to the next one further east on the second Sunday of March, then set it back to your correct time zone on the first Sunday of April. Repeat this on the last Sunday of October and the first Sunday of November. (If you are in the Eastern time zone (zone 2), set the switch to zone 1.)

If the unit was built between Jan 2006 and July 2006 (serial numbers that start 601 to 606), then you can change the start and end dates for DST. See: then choose the Group 2 link. Press and hold the Alarm 1 button then press the Month/Date or Calendar button. After three seconds the unit will display the start date for daylight savings. Press and hold the Alarm 1 and Month/Date or Calendar buttons. When the display is flashng (within 5 seconds from the press and hold step), press the Down or Set button (depending on the SmartSet mode) three times until the display reads 3 and F2 (alternating with the date of that Sunday).

For the end date, press and hold Alarm 2 then press the Month/Date or Calendar button. Then press and hold Alarm 1 and the Month/Date or Calendar button. Again within 5 seconds, press the Up button or Set until the display shows 11 and F.

If the display stops flashing, repeat and set the new dates faster.

You'll have to repeat this is the battery is removed or replaced.

I hope this helps.

Cindy Wells

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Our Carrier Comfort Zone II thermostat, which has 2 zone readouts, currently shows a temperature of 00, as in zero zero, on one zone. That is the main zone for our home. Zone 2, for spare bedrooms, etc....

This .pdf file may be of help to you:'s%20Guide.pdf
Perhaps you could get some help from Carrier Support here:
I noticed they have an option of talking to an engineer, and perhaps they could explain how to reset or set the unit.
Hope this helps.

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It sounds like the machine has lost some programming. What you were doing once per month is what I recommend if not used regularly, but the battery has probably now got to the stage where it is too old to even hold charge for a month. It is probably best to get the battery (internal vanadium type) replaced as it may have started leaking if it is too old. The dealer who replaces it can reset your decimal places at the same time. If you just want to get it running as is and take a chance, then do the flag clear (to get the FFFFFFFFFF on display then SUBTOTAL) on one of your WORKING machines, and tell me the big number that it prints out (this will not lose any data on your working machines, it just reads the settings)

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Zenith Redi_set clock radio Z230S

Describe your problem: Depress MONTH/DATE and ALARM1 for 3 seconds and display will show DST 'start' month,week,and date.
Display will show 4F 4.1, alternately flashing

4F = April First week. 4.1 = April 1.That is the old dates for change. What we want to do is to change to the new dates. Once it is done, it will change in the new dates as it did on the
old dates..

Hold down the MONTH/DATE button for 5 seconds, and while pressing the - or down button3 times, until the display shows '3'F2.
3 is month F2 is the week.
=March 2nd week.
You have successfully change the March changeover.

Now for the November change.
Depress and hold MONTH/DATE and ALARM2 after 3 second the display will show DST 'end' month,week, and date.
First digit will be 10 =month. second digit will be L=Last week, and date, will flash alternately.
While holding down the MONTH/DATE press the + or UP button once the display will show 11 (November) and F (first week) and 1 as date alternately flashing.
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Hi there.
The laptop is suffering from major issues with the bios.
Seeing as the laptop is only 6 months old i would recommend that you take advantage of the manufacturers warranty, providing the fault is not user fault (by what you explain its hardware) they will fix the issue or replace the laptop at no cost to yourself. Standard warranty is 12 months.
I don't want to tell you to start messing about with it as doing so will void the warranty.
While you are still able to use it back up all of your data before you send it in.

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