Dear FixYa Tech, I replaced the battery on my Casio AD-520 and adjusted it to the right time, no problem. But, I set the alarm to make sure it worked properly and it did not. Only the alarm symbol inside the sceen blinks when the alarm is to be going off and I noticed that if I push the lower button on the right slightly, the one under the one that turns to move the hands, I hear the alarm only then. Also the hourly beep does not sound even when properly selected to be on. The watch makes beeping sounds ok when setting times. Thank you in advance for help!

It is likely that the battery is depleted sufficiently that the sound feature can't work. Take it to a local jeweler for battery replacement service.

https://www.fixya.com/support/r27181038-changing_watch_batteries

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Setting the Time
1. G-Shock watches feature a digital display that is set using the function buttons on the outside of the watch face. To set the time, press and hold the the upper left button until the seconds unit blinks on the display. Reset the seconds to "00" by pressing the lower right button.
   
   Push the lower left button to switch to the hours unit, which will start blinking. Advance the hour by pressing the lower right button. If you hold down the lower right button, it will advance the hour unit at a higher rate of speed. Once the hour is set, press the lower left button to switch to the minutes unit. As with the hours unit, pressing the lower right button will advance the minutes and holding it down will advance the minutes rapidly.
   
   Once the time is set, press the upper left button to save the setting.
Backlight
2. The backlight on a G-Shock watch has a manual control and an automatic function that will light the face of the watch whenever the alarm, countdown alarm or hourly alarm ring. To use the manual backlight, press the button on the bottom of timepiece. The light will glow for approximately 2 seconds before going out.
   
   The automatic function is set by pressing and holding the lower right button. When the automatic function is set, an indicator icon will display on the watch face above the seconds unit. You can turn off the automatic backlight function by pressing and holding the lower right button until the icon disappears.
   
   Note that backlight causes a drain on the battery, and overuse of the backlight will greatly reduce battery life.
Setting the Alarm
3. The G-Shock has an alarm that emits an audible tone for approximately 20 seconds when it turns on. To set the alarm, press the lower left button until "AL" displays in the upper left corner of the timepiece. Press and hold the upper left button until the hours unit starts to blink. Adjust the hour by pressing the lower right button. As when setting the time, you can advance the hour at a higher rate of speed by holding down the lower right button.
   
   Once the hour unit is set, press the lower left button to advance to the minutes. Use the lower right button to set the minutes. Follow these same instructions to set the month and day you want the alarm set.
   
   When the alarm time and date are entered, press the upper left button to save the setting. Push the lower left button three times to return the G-Shock to "Timekeeping" mode.

click the mode button 3 times and hold the adjust button until it gives you an option to change you change it by using the mode button to choose min.s or hours and the time memo button to go down in time and the receive button to go up in time and then click adjust to set it then you just click the time memo button to turn it on and off a few lines on the top right corner should tell you if it is on or off.

Setting CASIO G-Shock Watch 1) Home City
2) Home city and Setting the digital time
3) Adjusting hands
4) Alarm set/on/off 5) Snooze 6) Hourly Chime A --- B ( ) Button reference C __ D
1) Select home city first (if equiped):
Press C until regular timekeeping mode is reached. Hold A until seconds flash. Press C to get to city code. Use B and D to move city east or west to your home city. Press A to set and exit.

2) Set time, Date, etc:
Hold A until seconds flash. Press C until item to adjust is flashing. Press B or D to adjust. Press C to go to next item. Press B or D to adjust. Press A when done adjusting all items to exit.

3) Adjust hands (if equiped):
Press C until H-Set is reached. Hold A until time flashes. Press D to advance minute hand. Press B while holding D to set faster and continuously. Press D to stop hands when correct analog time is reached. Press A to exit H-Set mode. Press C to go back to timekeeping mode.

In Timekeeping mode B is illumination and D is time/day/date display advance.

4) Alarm set/on/off
Press C until alarm mode is reached (AL1 - AL4 + SNZ and SIG). Press D to select alarm to adjust. Hold A until alarm time flashes. Press B or D to adjust alarm time. Press C to toggle between hour and minutes set. Press A to exit. Press A to turn alarm on and off.

Repeat for AL2 - AL4. Press C to return to Timekeeping mode.

5) Snooze (SNZ) Press C until alarm mode is reached (AL1 - AL4 + SNZ and SIG). Press D to select snooze alarm (SNZ). Hold A until snooze alarm time flashes. Press B and D to adjust snooze alarm time. Press C to toggle between hour and minutes set. Press A to exit. Press A to turn snooze alarm on and off. Press C to return to Timekeeping mode.

To stop any alarm, press any button. To cancel next snooze, Press C and go to either the timekeeping screen or the snooze alarm screen.

6) Hourly Chime (SIG): Press C until alarm mode is reached (AL1 - AL4 + SNZ and SIG).
Press D to select hourly chime (SIG). Press A to toggle chime on and off.

Press C to return to Timekeeping mode.

The day of the week will be right after setting the year, month, and date. Adjust with step 2) from timekeeping mode (where time, date, and day can be toggled with button D).

Setting CASIO G-Shock Watch

1) Home City
2) Setting the digital time
3) Adjusting hands
4) Alarm set/on/off
5) Snooze
6) Hourly Chime

A --- B
( ) Button reference
C __ D

1) Select home city first (if equiped):
Press C until regular timekeeping mode is reached. Hold A until seconds flash. Press C to get to city code. Use B and D to move city east or west to your home city. Press A to set and exit.

Press C until timekeeping mode is reached (high beep).

2) Set time, Date, etc:
Hold A until seconds flash. Press C until item to adjust is flashing. Press B or D to adjust. Press C to go to next item. Press B or D to adjust. Press A to exit.

3) Adjust hands (if equiped):
Press C until H-Set is reached. Hold A until time flashes. Press D to advance minute hand. Press B while holding D to set faster and continuously. Press D to stop hands when correct analog time is reached. Press A to exit H-Set mode. Press C to return to timekeeping mode.
In Timekeeping mode B is illumination and D is time/day/date display advance.

4) Alarm set/on/off
Press C until alarm mode is reached (AL1 - AL4 + SNZ and SIG). Press D to select alarm to adjust. Hold A until alarm time flashes. Press B or D to adjust alarm time. Press C to toggle between hour and minutes set. Press A to exit. Press A to turn alarm on and off. Repeat for AL2 - AL4. Press C to return to Timekeeping mode.
To stop any alarm, press any button.

5) Snooze (SNZ):
Press C until alarm mode is reached (AL1 - AL4 + SNZ and SIG). Press D to select snooze alarm (SNZ). Hold A until snooze alarm time flashes. Press B or D to adjust snooze alarm time. Press C to toggle between hour and minutes set. Press A to exit. Press A to turn snooze alarm on and off. Press C to return to Timekeeping mode.

To cancel the next snooze: Press C until the timekeeping screen is reached or go to the Snooze alarm (SNZ) screen.

6) Hourly Chime (SIG):
Press C until alarm mode is reached (AL1 - AL4 + SNZ and SIG).
Press D to select hourly chime (SIG). Press A to toggle chime on and off.

Press C to return to Timekeeping mode.

Good luck,
Techjoel

Setting CASIO G-Shock Watch

1) Home City
2) Home city and Setting the digital time
3) Adjusting hands
4) Alarm set/on/off
5) Snooze
6) Hourly Chime

A -- B
( ) Button reference
C __ D

1) Select home city first (if equiped):
Press C until regular timekeeping mode is reached. Hold A until seconds flash. Press C to get to city code. Use B and D to move city east or west to your home city. Press A to set and exit.
Press C until timekeeping mode is reached (high beep).

2) Set time, Date, etc:
Hold A until seconds flash. Press C until item to adjust is flashing. Press B or D to adjust. Press C to go to next item. Press B or D to adjust. Press A to exit.

3) Adjust hands (if equiped):
Press C until H-Set is reached. Hold A until time flashes. Press D to advance minute hand. Press B while holding D to set faster and continuously. Press D to stop hands when correct analog time is reached. Press A to exit H-Set mode. Press C to return to timekeeping mode.
In Timekeeping mode B is illumination and D is time/day/date display advance.

4) Alarm set/on/off
Press C until alarm mode is reached (AL1 - AL4 + SNZ and SIG). Press D to select alarm to adjust. Hold A until alarm time flashes. Press B or D to adjust alarm time. Press C to toggle between hour and minutes set. Press A to exit. Press A to turn alarm on and off. Repeat for AL2 - AL4. Press C to return to Timekeeping mode.
To stop any alarm, press any button.

5) Snooze (SNZ):
Press C until alarm mode is reached (AL1 - AL4 + SNZ and SIG). Press D to select snooze alarm (SNZ). Hold A until snooze alarm time flashes. Press B or D to adjust snooze alarm time. Press C to toggle between hour and minutes set. Press A to exit. Press A to turn snooze alarm on and off. Press C to return to Timekeeping mode.

To cancel the next snooze: Press C until the timekeeping screen is reached or go to the Snooze alarm (SNZ) screen.

6) Hourly Chime (SIG):
Press C until alarm mode is reached (AL1 - AL4 + SNZ and SIG).
Press D to select hourly chime (SIG). Press A to toggle chime on and off.

Press C to return to Timekeeping mode.

Good luck,
Techjoel

Visit this site:

http://world.casio.com/wat/download/en/manual/

Enter the right numbers from the caseback and download manual for your watch.
Don't forget to rate, please.

I had the same nagging problem on my GSHOCK 2816. The Casio manual was no help at all. What I did to turn my alarm(s)  (mine has 5 independant alarms) off is switch to alarm mode (as you are looking at the face of the watch, it's the bottom left button. I push it twice to get to alarm mode. My display shows the current alarm time, and then the number 1. If you hit the top right button on the watch, it turns this alarm off. If you hit the bottom right button, it cycles to the next alarm in the list. To set an alarm, just cycle to the one you want, and then hold the top-left button until you see it flashing, then use the right side buttons to adjust the time. Hope that helps. This was a big pain in the **** until I figured it out.

Hold down the "Adjust" button (top left) for three seconds. It won't adjust unless you hold the button down.

Press "Mode" (bottom left) to change what you're adjusting, seconds, hour, minute.

Press the top right and bottom right buttons to adjust the number up and down.

Press "Adjust" again when you're done setting the watch.

To change date, alarm, alternate time, etc, press "Mode" to get to those functions before hitting "Adjust."

I hope that helps.

Alarm Setting:

1st: Press the mode button to go to the alarm screen.

2nd: Press the adjust button for the time to flash

3rd: (For the Hourly Alarm) You can adjust the time here while it is flashing by pressing the start/stop button. Cycle through this until you have the time you want. The setting will have the P in the left side of the screen for PM (night time).

4th: (For the Daily Alarm) Do steps  1-3 once the time is flashing use the Mode button to cycle through to the date field of the watch. Once it is flashing you can use the Start/Stop Button to chose which date Month/Day, after chosing the month just press the Mode button once more to go to the day field.