Watch Catalog

Casio module 5691

Solar powered module. 5691 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 5691

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. In the Timekeeping Mode, hold A for at least two seconds and let go when the Home City name shows.
  2. Press C to move through the settings: Home City, summer time, seconds, hours, minutes, year, month, day.
  3. On the seconds, press D to reset them to 00.
  4. On the other settings, press B or D to change them (hold for fast).
  5. Press A to finish.

Good to know

Resetting the seconds between 30 and 59 adds one minute.

For 12/24-hour format, press C eight times in the same setting mode and toggle with D.

From Casio's guide, page 15

Daylight saving time

  1. In the Timekeeping Mode, hold A for at least two seconds and let go when the Home City name shows.
  2. Press C once to reach the summer time setting.
  3. Press D to step through AUTO, OFF and ON.
  4. Press A to finish.

Good to know

AUTO, the factory setting, switches between standard and summer time by itself.

Each World Time city has its own summer time setting: in the World Time Mode, hold A for two seconds and use D.

From Casio's guide, page 15

Home City

  1. In the Timekeeping Mode, hold A for at least two seconds and let go when the Home City name shows.
  2. Press B or D to pick your city (hold for fast).
  3. Press A to finish.

Good to know

In the World Time Mode, press A and B together to swap the Home City with the World Time city.

From Casio's guide, page 15

Set an alarm

  1. Press C until the mode hand points to AL (the Alarm Mode).
  2. Press D to pick an alarm, AL1 to AL5.
  3. Hold A for at least two seconds and let go when the hour flashes.
  4. Press B or D to set the hour, press C, then set the minutes the same way.
  5. Press A to finish; ALM shows while an alarm is on.

Good to know

In the Alarm Mode, press A to turn the shown alarm on or off; on the SIG screen it does the same for the hourly signal.

The alarm beeps for 10 seconds; press any button to stop it.

From Casio's guide, page 18

Realign the hands

  1. In the Timekeeping Mode, hold A for at least five seconds and let go when SUB flashes.
  2. Press B or D until the mode hand points at 3 o'clock.
  3. Press C.
  4. Press B or D until the hour and minute hands are both at 12 o'clock.
  5. Press A to finish.

Good to know

Strong magnetism or a knock can put the hands out of step with the digital time.

From Casio's guide, page 23

Light

  1. Press B in any mode to light the face and the display.
  2. To change the duration: in the Timekeeping Mode, hold A for at least two seconds until the Home City name shows, then press C 12 times to reach LIGHT.
  3. Press D to choose LT1 (1.5 seconds) or LT3 (3 seconds).
  4. Press A to finish.

Good to know

The light goes off when an alarm starts to sound.

From Casio's guide, page 9

Button beep

  1. In the Timekeeping Mode, hold A for at least two seconds until the Home City name shows.
  2. Press C 11 times: KEY♪ or MUTE flashes.
  3. Press D to choose KEY♪ (beep on) or MUTE (beep off).
  4. Press A to finish.

Good to know

Alarm and timer tones still sound with the beep muted.

From Casio's guide, page 24

Stopwatch

  1. Press C until the mode hand points to ST (the Stopwatch Mode).
  2. Press D to start, D to stop, and D again to carry on.
  3. When it is stopped, press A to reset it to zero.
  4. For split times, press A before starting so SPL shows, start with D, then press A at each split.

Good to know

It runs up to 24 hours, in 1/100 seconds for the first hour.

From Casio's guide, page 20

Countdown timer

  1. Press C until the mode hand points to TR (the Timer Mode).
  2. Hold A for at least two seconds and let go when the minutes flash.
  3. Press B or D to set the minutes, press C, then set the seconds the same way.
  4. Press A to finish setting.
  5. Press D to start, pause and carry on; when paused, press A to reset.

Good to know

The start time goes up to 60 minutes; 00'00 gives a 60-minute countdown.

At zero it beeps for 10 seconds; press any button to stop it.

From Casio's guide, page 22

Reset

  1. In the Timekeeping Mode, hold A for at least two seconds until the Home City name shows.
  2. Press C twice: the seconds flash.
  3. Hold B for at least seven seconds; ALL and RESET alternate.
  4. Let go when only RESET shows.
  5. Press A to finish.

Good to know

This returns settings, alarms, stopwatch, timer and reminders to factory defaults and also unpairs the phone.

From Casio's guide, page 25

Module 5691 specs

Type
solar
Power
Tough Solar (Solar powered)
Accuracy
±15 seconds per month (with no mobile link function)
Functions
World time, Stopwatch, Timer, Alarm/hourly time signal, Light, Light color, Calendar, Mute feature, Energy saving feature, Battery display/alert, Run time, Hand shift feature, 12/24-hour format, Date/month display swapping, Day display
Manual
Casio's operation guide for module 5691

Watches with the 5691