Introduction
Thank you for purchasing the Sharp Digital Alarm Clock, Model SPC483. This manual provides detailed instructions for setting up, operating, and maintaining your new alarm clock. Please read this manual thoroughly before use to ensure proper function and to maximize your product experience.

Figure 1: Front view of the Sharp Digital Alarm Clock SPC483, displaying the time 12:08 PM.
Safety Information
- Do not mix old and new batteries.
- Do not mix alkaline, standard (carbon-zinc), or rechargeable (nickel-cadmium) batteries.
- Remove batteries if the clock will not be used for an extended period.
- Keep the clock away from extreme temperatures, direct sunlight, and moisture.
- Do not attempt to disassemble or modify the clock. This will void the warranty.
Package Contents
Verify that all items are present in the package:
- Sharp Digital Alarm Clock (Model SPC483)
- Instruction Manual (this document)
Note: 2 AAA batteries are required for operation and are not included.
Product Overview
The Sharp Digital Alarm Clock SPC483 features a large 1-inch LCD display, a tactile rubberized finish, and easy-to-use top button controls. It operates on batteries, offering portability and convenience.

Figure 2: Top view of the alarm clock showing the control buttons and their functions.
Control Buttons:
- AL. TIME (Alarm Set): Used to set the alarm time.
- TIME (Time Set): Used to set the current time.
- SNOOZE/BACKLIGHT: Activates the blue backlight for 5 seconds and functions as a snooze button during an alarm.
- HR (Hour Set): Adjusts the hour during time or alarm setting.
- MIN (Minute Set): Adjusts the minute during time or alarm setting.
- ON/OFF (Alarm On/Off): Slides to enable or disable the alarm function.
Setup
1. Battery Installation
- Locate the battery compartment cover on the back of the clock.
- Remove the cover by sliding it down or lifting it off.
- Insert two (2) new AAA batteries, ensuring the correct polarity (+ and -) as indicated inside the compartment.
- Replace the battery compartment cover.
2. Setting the Current Time
- Press and hold the TIME button until the hour display begins to flash.
- Press the HR button repeatedly to adjust the hour. Observe the PM indicator for correct AM/PM setting.
- Press the MIN button repeatedly to adjust the minutes.
- Once the desired time is set, press the TIME button again to confirm and exit time setting mode. The display will stop flashing.
Operating Instructions
1. Setting the Alarm Time
- Press and hold the AL. TIME button until the alarm hour display begins to flash.
- Press the HR button repeatedly to adjust the alarm hour. Observe the PM indicator for correct AM/PM setting.
- Press the MIN button repeatedly to adjust the alarm minutes.
- Once the desired alarm time is set, press the AL. TIME button again to confirm and exit alarm setting mode. The display will stop flashing.
2. Activating the Alarm
- Slide the ON/OFF switch on the top of the clock to the 'ON' position. A bell icon will appear on the display, indicating the alarm is active.
- To deactivate the alarm, slide the ON/OFF switch to the 'OFF' position. The bell icon will disappear.
3. Snooze Function and Backlight
- When the alarm sounds, press the large SNOOZE/BACKLIGHT button on top of the clock to activate the snooze function. The alarm will pause for approximately 5 minutes before sounding again.
- To view the time in low light conditions, press the SNOOZE/BACKLIGHT button. The blue backlight will illuminate the display for approximately 5 seconds and then turn off automatically to conserve battery life.

Figure 3: Pressing the SNOOZE/BACKLIGHT button activates the blue backlight for temporary illumination.
Maintenance
Cleaning
To clean the clock, wipe it with a soft, dry cloth. Do not use abrasive cleaners, solvents, or chemical sprays, as these may damage the finish or internal components.
Battery Replacement
When the display becomes dim or the alarm function weakens, it is time to replace the batteries. Follow the battery installation steps outlined in the Setup section.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Display is dim or blank. | Low or dead batteries. Incorrect battery installation. | Replace with new AAA batteries, ensuring correct polarity. |
| Alarm does not sound. | Alarm is not set or is turned off. Low batteries. | Ensure the alarm time is set and the ON/OFF switch is in the 'ON' position. Replace batteries if needed. |
| Backlight does not work. | Low batteries. | Replace with new AAA batteries. The backlight is designed for temporary illumination only. |
| Incorrect time display. | Time was not set correctly. | Refer to the 'Setting the Current Time' section to reset the time. |
Specifications
| Model Number | SPC483 |
| Display Type | Digital LCD |
| Power Source | 2 x AAA Batteries (not included) |
| Product Dimensions (L x W x H) | 4" x 1.7" x 2.3" (10.16 cm x 4.32 cm x 5.84 cm) |
| Weight | 2.11 ounces (59.8 grams) |
| Special Features | Large Display, On-Demand Blue Backlight, Ascending Alarm, Tactile Rubberized Finish |
Warranty and Support
Sharp products are manufactured to high-quality standards. For warranty information or technical support, please refer to the documentation provided with your purchase or visit the official Sharp website. Keep your purchase receipt as proof of purchase.





