Watch Catalog

Casio module 5545

Solar powered module. 5545 is the number engraved on the caseback of these watches, and Casio files its operation manual under it. 1 watch in the catalog runs on it.

How to operate module 5545

Short steps in our words. The buttons are lettered as in Casio's operation guide, where each task's page is given.

Set the time and date

  1. Unscrew the crown. In the Timekeeping Mode, pull it out: CITY flashes.
  2. Press D: HOUR-MIN flashes and the second hand points at A (a.m.) or P (p.m.).
  3. Turn the crown to set the minutes.
  4. Press B: HOUR flashes. Turn the crown to set the hour.
  5. Press B: the year flashes. Turn the crown to set it.
  6. Press B: the month and day flash. Turn the crown to set them.
  7. Push the crown back in, then screw it in; the seconds start from 0.
  8. For 12/24-hour format: pull out the crown, press B five times until 12H or 24H flashes, turn the crown to choose, and push the crown back in.

Good to know

Set the Home City and summer time first; the world time depends on them.

The day of the week follows the date by itself.

Turning the crown quickly starts fast movement; turn it the other way or press any button to stop.

Hold B for about two seconds in any mode to go back to the Timekeeping Mode.

From Casio's guide, page E-26

Summer time

  1. Unscrew the crown. In the Timekeeping Mode, pull it out: CITY flashes.
  2. Press B to show the DST setting.
  3. Turn the crown away from you to switch between OFF and ON.
  4. Push the crown back in and screw it in. DST shows while summer time is on.

Good to know

A time off by exactly one hour may need this setting changed.

It cannot be switched while UTC is the Home City.

From Casio's guide, page E-24

Home City

  1. Unscrew the crown. In the Timekeeping Mode, pull it out: CITY flashes.
  2. Turn the crown until the second hand points at the code of your city.
  3. Push the crown back in and screw it in.

Good to know

The Home City goes back to TYO (Tokyo) when the charge drops to Level 5 or the battery is replaced; set it again.

In the World Time Mode, hold D for at least three seconds to swap the Home City with the World Time City.

From Casio's guide, page E-24

Set an alarm

  1. In the Timekeeping Mode, press B until the Alarm Mode shows (ALARM, after the Countdown Timer Mode).
  2. Press A or C until the alarm you want shows, AL1 to AL5.
  3. Unscrew the crown and pull it out: the alarm time flashes.
  4. Turn the crown to set the minutes.
  5. Press B and turn the crown to set the hour.
  6. Push the crown back in and screw it in; setting a time turns that alarm on.
  7. To switch an alarm or the hourly signal (SIG) on or off, select it with A or C in the Alarm Mode and press D.

Good to know

In 12-hour format, mind a.m. or p.m.: A or P shows.

An alarm sounds for about 10 seconds in any mode; press any button to stop it.

In the Alarm Mode, hold A to test the sound.

From Casio's guide, page E-79

Realign the hands

  1. Unscrew the crown. In the Timekeeping Mode, pull it out.
  2. Hold A for at least five seconds, until HAND SET flashes and then HAND ADJ shows.
  3. Wait until all the hands have moved to 12 o'clock.
  4. Push the crown back in and screw it in; the hands go back to the time.
  5. Check that the hands match the digital time; repeat if they do not.

Good to know

Strong magnetism or a knock can put the hands out of line with the display. The watch also corrects them by itself from time to time.

Pushing the crown in before every hand reaches 12 o'clock does not adjust them.

From Casio's guide, page E-29

Light

  1. Press L in any mode to light the display.
  2. To change the duration: unscrew the crown, pull it out in the Timekeeping Mode and press B four times until LIGHT shows.
  3. Turn the crown to choose 1 (1.5 seconds) or 3 (three seconds), then push the crown back in and screw it in.
  4. Auto light (lights when you tilt the watch towards your face): pull out the crown in the Timekeeping Mode, press B three times until AUTO shows, turn the crown to choose ON or OFF, and push the crown back in.

Good to know

Auto light works only in low light. Turn it off before riding a bicycle or driving.

The light goes off when an alarm sounds or when you use the crown.

To move the hands out of the way of the display, hold L and press B; press any of A to D to bring them back.

From Casio's guide, page E-85

Button beep

  1. Unscrew the crown. In the Timekeeping Mode, pull it out.
  2. Press B twice: KEY♪ or MUTE flashes.
  3. Turn the crown to choose KEY♪ (beep on) or MUTE (beep off).
  4. Push the crown back in and screw it in.

From Casio's guide, page E-89

Stopwatch

  1. In the Timekeeping Mode, press B until the Stopwatch Mode shows (STW, after the Data Recall Mode).
  2. Press A to start, A to stop, and A again to carry on.
  3. When it is stopped, press C to reset it to zero.
  4. For a split time, press C while it runs (SP shows); press C again to let the display catch up.

Good to know

It counts up to 23 hours 59 minutes 59.99 seconds and keeps running in other modes.

From Casio's guide, page E-74

Countdown timer

  1. In the Timekeeping Mode, press B until the Countdown Timer Mode shows (TIMER, after the Stopwatch Mode).
  2. Unscrew the crown and pull it out: the minutes flash.
  3. Turn the crown to set the start time in minutes; set 00'00 for 60 minutes.
  4. Push the crown back in and screw it in.
  5. Press A to start, A to stop, A to carry on; when stopped, press C to reset.

Good to know

At zero an alarm sounds for ten seconds in any mode; press any button to stop it. The countdown then goes back to the start time.

From Casio's guide, page E-76

Module 5545 specs

Type
solar
Power
Solar powered
Accuracy
±15 seconds per month
Functions
World time, Stopwatch, Timer, Alarm/hourly time signal, Light, Light color, Calendar, Mute feature, Hand home position correction feature, Energy saving feature, Battery display/alert, Run time, 12/24-hour format, Hand shift feature
Manual
Casio's operation guide for module 5545

Watches with the 5545