Cat. No. 12-1586A
OWNER’S MANUAL
Please read before using this equipment.
Chronomatic-278
AM/FM LED Alarm Clock Radio
CONTENTS
Preparation ........................................................................................................... 4
Connecting Power ........................................................................................... 4
Installing the Backup Battery .......................................................................... 4
Adjusting the Display ...................................................................................... 4
Clock Operation ................................................................................................... 5
Setting the Time .............................................................................................. 5
Resetting the Seconds ............................................................................. 5
Using the Alarms ............................................................................................. 6
Setting the Alarm Time ............................................................................. 6
Using the Buzzer Alarm ............................................................................ 6
Using the Radio Alarm .............................................................................. 6
Using the Snooze Feature .............................................................................. 7
Using the Sleep Timer ..................................................................................... 7
Playing the Radio ................................................................................................ 8
Care and Maintenance ........................................................................................ 9
FCC Information ............................................................................................ 10
Specifications .................................................................................................... 11
3
PREPARATION
• If the display flashes after a power
failure, replace the battery and
reset the clock.
CONNECTING POWER
Plug the Chronomatic-278’s power
cord into a standard AC outlet. The dis-
play flashes when the radio is first
plugged in or if the power is interrupted
and the backup battery is missing or
weak.
1. To remove the battery compart-
ment cover, press and hold the
tab in the direction of the arrow
then lift off the cover.
2. Snap the battery into the terminals
and place it in the compartment.
INSTALLING THE
BACKUP BATTERY
To keep the clock running in the event
of a power failure, install a 9-volt back-
up battery (not supplied). We recom-
mend an alkaline battery, such as
Radio Shack Cat. No. 23-553. A fresh
battery powers the clock for up to 8
hours, and sounds the alarm for up to
10 minutes if power fails.
Caution: Use only a fresh battery
of the required size and type.
3. Replace the cover.
Notes:
• Before you install the backup bat-
tery, plug in the power cord to pre-
vent unnecessary drain on the
battery.
ADJUSTING THE
DISPLAY
Set DIMMER LOW/HIGH to LOW or
HIGH, depending on the amount of
light in the room.
• Replace the battery when BAT-
TERY SENTINEL on the right side
of the display lights.
4
CLOCK OPERATION
Resetting the Seconds
SETTING THE TIME
This feature lets you reset the seconds
to zero. This is handy if you want to set
the clock to a precise reference time.
1. Press and hold TIME SET, then
press HOUR. The hour digits
advance by 1 each time you press
HOUR. Press and hold HOUR to
rapidly advance the hour digits.
Follow these steps to reset the sec-
onds.
1. Press and hold SLEEP, then press
ALARM SET. The display shows
the set time’s minutes and sec-
onds.
Note: The PM indicator appears
on the top left of the display at
12:00 noon and disappears at
12:00 midnight.
2. While you hold down TIME SET,
press MINUTE. The minute digits
advance by 1 each time you press
MINUTE. Press and hold MINUTE
to rapidly advance the minute dig-
its.
2. Continue to press and hold
SLEEP, then press HOUR. The
seconds reset to zero.
3. Release SLEEP.
Note: The minutes advance by one if
the display showed more than 29 sec-
onds when you reset the seconds.
3. Release TIME SET when the
desired time appears on the dis-
play.
5
Using the Buzzer Alarm
USING THE ALARMS
To turn on the buzzer alarm, set
Setting the Alarm Time
ALARM/AUTO/OFF/ON
ALARM
.
to
ALARM/AUTO/OFF/ON
OFF
.
1. Set
to
At the preset time, the alarm sounds
and automatically turns off after 1 hour,
59 minutes.
To turn off the alarm before 1 hour, 59
ALARM SET
, then
2. Press and hold
ALARM/AUTO/OFF/ON
minutes, set
OFF
to
HOUR
press
play advances by one hour each
HOUR
. The time on the dis-
.
time you press
HOUR
digits.
. Hold down
To adjust the volume of the alarm
VOLUME
to rapidly advance the hour
sound, rotate
.
Using the Radio Alarm
ALARM/
To turn on the radio alarm, set
AUTO/OFF/ON
AUTO
. Be sure the
to
ALARM SET
3. While you hold down
,
station and volume are set. See “Play-
ing the Radio.”
MINUTE
press
display advances by one minute
MINUTE
. The time on the
each time you press
. Hold
to rapidly advance
the minute digits.
At the preset time, the radio turns on
and automatically turns off after 1 hour,
59 minutes.
MINUTE
down
To turn off the radio before 1 hour, 59
ALARM/AUTO/OFF/ON
minutes, set
OFF
to
.
ALARM SET
4. Release
when the
desired alarm time appears on the
display.
To view the preset alarm time at any
ALARM SET
time, press
.
6
To play the radio for 59 minutes, press
SLEEP
display. The radio plays for 59 min-
USING THE SNOOZE
FEATURE
once. 0:59 appears on the
utes, then turns off.
To temporarily silence the buzzer or
radio so it sounds again after 9 min-
SNOOZE
utes, press
. You can repeat
ALARM/AUTO/OFF/ON
this until you set
OFF
to
to turn off the alarm.
To play the radio for more than 59 min-
SLEEP
utes, press and hold
. 0:59 ap-
pears on the display and the radio
begins to play. While you hold down
SLEEP
HOUR
once. 1:59 ap-
, press
To reset the alarm to sound again at
the same alarm time on the next day,
MINUTE
pears. Then press
display shows the desired sleep time.
until the
ALARM/AUTO/OFF/ON
set
back to
ALARM AUTO
or
.
Note: If BATTERY SENTINEL lights
SNOOZE
while you press
battery is getting low.
, the backup
To play the radio for less than 59 min-
SLEEP
utes, press and hold
. 0:59 ap-
pears on the display and the radio
begins to play. While you hold down
USING THE SLEEP
TIMER
SLEEP
MINUTE
. The time on the
, press
display decreases by one minute each
MINUTE
time you press
.
The sleep timer lets you set the radio
to play for up to 1 hour 59 minutes,
then automatically turn off. This is use-
ful if you want the radio to play as you
go to sleep.
ALARM/
To use the sleep timer, set
AUTO/OFF/ON OFF
MINUTE
Note: Hold down
to rapidly de-
to
.
crease the playing time.
ALARM/AUTO/OFF/
Note: You can set
ON AUTO ALARM
if you want to
To turn off the radio before the preset
sleep time has elapsed, press
to
or
use the sleep timer with the alarm
function.
SNOOZE
.
7
PLAYING THE RADIO
1. Rotate VOLUME to its minimum
6. To turn off the radio, set ALARM/
level.
AUTO/OFF/ON to OFF.
2. Set ALARM/AUTO/OFF/ON to ON.
Note: The AM antenna is built in. Ro-
tate the clock radio for the best AM re-
ception. For the best FM reception,
fully extend the AC power cord (which
is the FM antenna).
3. Set FM/AM to the desired band.
4. Rotate TUNING to the desired fre-
quency.
5. Rotate VOLUME to a comfortable
listening level.
8
CARE AND MAINTENANCE
Your clock radio is an example of superior design and craftsmanship. The following
suggestions will help you care for your clock radio so you can enjoy it for years.
Keep the clock radio dry. If it gets wet, wipe it dry immediately. Liquids
might contain minerals that can corrode the electronic circuits.
Handle the clock radio gently and carefully. Dropping it can damage
circuit boards and cases and can cause the clock radio to work im-
properly.
Use and store the clock radio only in normal temperature environ-
ments. Temperature extremes can shorten the life of electronic de-
vices and distort or melt plastic parts.
Keep the clock radio away from dust and dirt, which can cause pre-
mature wear of parts.
Wipe the clock radio with a damp cloth occasionally to keep it looking
CLEANER
new. Do not use harsh chemicals, cleaning solvents, or strong deter-
gents to clean the clock radio.
Modifying or tampering with the clock radio’s internal components can cause a mal-
function and might invalidate your clock radio’s warranty and void your FCC autho-
rization to use it. If your clock radio is not performing as it should, take it to your local
Radio Shack store for assistance.
9
FCC INFORMATION
Your radio might cause TV or radio in-
terference even when it is operating
properly. To determine whether your
radio is causing the interference, turn
off your radio. If the interference goes
away, your radio is causing the inter-
ference. Try to eliminate the interfer-
ence by:
• Moving your radio away from the
TV or other radio
• Contacting your local Radio
Shack store for help
If you cannot eliminate the interfer-
ence, the FCC requires that you stop
using the radio.
10
SPECIFICATIONS
Bands
AM.................................................................................................530-1710 kHz
FM....................................................................................................88-108 MHz
Intermediate Frequency
AM..........................................................................................................455 kHz
FM........................................................................................................10.7 MHz
Power Output.............................................................................320 mW (maximum)
Speaker ...........................................3 Inch (5.7 cm) Ferrite, Dynamic-Type, 8 ohms
Power Requirements.............................................12 V AC, 60 Hz, 6 Watts, DC 9 V
1
1
Dimensions (HWD)..................................................................2 /4 × 10 × 5 /2 Inches
(57 × 254 × 140 mm)
Weight .........................................................................................................1 lb. 9 oz
(0.71 kg)
Specifications are typical; individual units might vary. Specifications are subject to
change and improvement without notice.
11
12
13
RADIO SHACK LIMITED WARRANTY
This product is warranted against defects for 90 days from date of pur-
chase from Radio Shack company-owned stores and authorized Radio
Shack franchisees and dealers. Within this period, we will repair it with-
bring your Radio Shack sales
as proof of purchase date to any Radio Shack store. Warranty does
out charge for parts and labor. Simply
slip
not cover transportation costs. Nor does it cover a product subjected to
misuse or accidental damage.
EXCEPT AS PROVIDED HEREIN, RADIO SHACK MAKES NO
EXPRESS WARRANTIES AND ANY IMPLIED WARRANTIES ARE LIM-
ITED IN DURATION TO THE DURATION OF THE WRITTEN LIMITED
WARRANTIES CONTAINED HEREIN. Some states do not permit limita-
tion or exclusion of implied warranties; therefore, the aforesaid limita-
tion(s) or exclusion(s) may not apply to the purchaser.
This warranty gives you specific legal rights and you may also have other rights which vary
from state to state.
We Service What We Sell
9/94
RADIO SHACK
A Division of Tandy Corporation
Fort Worth, Texas 76102
9A5
Printed in Hong Kong
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