Casio TQ-451/551 User Manual
Casio Home Theater Systems
USER’S GUIDE TQ-451/551
A sticker is affixed to the glass of this clock when you purchase it. Be sure to remove the sticker before using the
Depending on the clock model, the configuration of your clock may differ somewhat from that shown in the
This product has a sweep second hand.
illuminates the face of the clock for about three seconds for easy reading of
the time in the dark.
(TQ-551) This product has a luminous resin face that accumulates light for easier reading.
(TQ-451) This product uses luminous paint for face markings and on its hands.
Next alarm dial
Alarm ON/OFF switch
ABOUT THE LUMINOUS PAINT
When the face of the timepiece is exposed to fluorescent light, the luminous paint stores the light, which it then
emits to glow in the dark for easy reading.
The luminous paint used by this product does not use any radioactive material. It is personally and ecologically
The amount of time before the glow emitted from the luminous paint starts to weaken is about five hours. This
time, however, depends on the brightness and angle of the light to which it was originally exposed.
Since ultraviolet light charges the luminous paint, you should use this timepiece in a room illuminated by
TO SET THE TIME
Rotate the Time setting dial to change the time setting.
Be sure to always press
with a thin object after loading batteries.
USING THE ALARM
This clock has two alarms. The 1st Alarm is the alarm that sounds when the current time reaches the alarm time
you set. The Next Alarm sounds after passage of the time setting of the
dial, starting from the point
that the 1st alarm begins to sound. The Next Alarm also has a snooze feature.
The alarm on/off setting affects both the 1st Alarm and the Next Alarm. You cannot turn the 1st Alarm and Next
Alarm on and off individually.
The Next Alarm sound is relatively louder than the 1st Alarm sound.
To set the alarm
1. Rotate the Alarm setting dial in the direction indicated by the arrow marked on clock to move the alarm hand to
the 1st Alarm time setting you want.
2. Rotate the
dial from 1st Alarm to the Next Alarm setting you want to use.
You can set the Next Alarm to any time from 5 to 60 minutes, in 5-minute steps.
3. Set the Alarm ON/OFF switch to
If the Alarm ON/OFF switch is already set to
, always be sure to change its setting to
and then back to
again after making alarm time setting changes.
Note that this clock does not distinguish between AM and PM times. If you set an alarm to wake up to in the
morning, the alarm will sound again at the same time in the evening if you leave the Alarm ON/OFF switch in the
To use the alarm
The 1st Alarm starts to sound when the current time reaches the time indicated by the alarm hand. The 1st Alarm
stops sounding when you press
or after it has sounded for about one minute. After the amount
of time set by the Next Alarm Dial passes, the Next Alarm starts to sound. Pressing
Next Alarm sound for about five minutes, after which it starts to sound again. In all, the Next Alarm will sound seven
If you do not press
after the Next Alarm starts to sound, it will stop automatically after about one
To deactivate the snooze feature so the alarm will not sound again, change the Alarm ON/OFF switch setting to
REPLACING THE BATTERY
Low battery power is indicated when timekeeping slows or stops completely. Should either of these symptoms
occur, replace the battery immediately. Do not leave a low or dead battery in the clock.
1. Pressing down at the point marked
on the battery compartment cover, slide the cover to remove it.
2. Remove the old battery.
3. Load a new battery. Make sure that its positive (+) and negative (–) ends are facing correctly. If you load the
battery incorrectly, it can burst and damage the clock.
4. Replace the battery compartment cover.
Keep batteries out of the reach of small children. If a battery is accidentally swallowed, contact your physician
Be sure to load the battery with its positive (+) and negative (–) ends facing correctly.
Never charge the battery that comes with the clock.
Should a battery ever leak while in the clock, wipe out the fluid with a cloth, taking care not to let any get onto
Replace the battery at least once a year, even if the current battery is working normally.
The battery that comes with the clock loses some power during transport and storage.
Time setting dial
Alarm setting dial