Sharp Atomic Clock Spc373 User Manual ⟶ <Premium>
Arthur’s fingers trembled as he unfolded the worn trifold paper. It wasn’t just any paper. It was the Sharp SPC373 Atomic Clock User Manual, and it was the last one on Earth.
The clock itself—a bland, grey plastic rectangle—sat on his dust-covered coffee table, its LCD screen blank. For three years, since the Great Signal Collapse, no one had cared about atomic time. Without the WWVB radio signal from Fort Collins, the “atomic” feature was a lie. People threw their “smart” clocks into landfills. They’d gone back to sundials and wristwatches.
But Arthur was a restorer. He was also desperately lonely.
He squinted at Section 4: Manual Setting (When Atomic Signal is Unavailable).
“Step 1: Press and hold the ‘SET’ button for 3 seconds,” he read aloud, his voice cracking from disuse.
He pressed. The seconds display began to blink. Hope, a tiny green shoot, broke through the concrete of his despair.
He followed the manual like a sacred text. Step 4: Use the ‘UP’ button to set the year. He set it to 2026, though everyone else called it “Year 4 of the Drift.” Step 7: Set the DST to ‘OFF’ permanently.
It took him an hour to fumble through the time, the date, the 12/24-hour format. The manual’s diagrams were cryptic—little icons of suns and moons that seemed to mock him. But on page two, a footnote saved him: Note: When the battery is low, the display will show a flashing ‘BAT’ icon.
He replaced the AA batteries. Suddenly, the second hand (a phantom on the digital readout) began to tick.
He held the clock to his ear. Tick. Tick. Tick.
It was the only metronome in a silent world. He placed it back on the table, and for the first time in years, he knew what time it was: 4:17 PM. sharp atomic clock spc373 user manual
He wasn't just measuring hours. He was measuring his survival.
Then, a miracle. At precisely 2:00 AM, as promised on page 3, the clock attempted a signal sync. The antenna icon flickered. Arthur held his breath. The world’s atomic clocks had long been silent… or so he thought.
The icon stopped flickering. The clock displayed 12:00 AM—the signal was dead.
But the manual had a final instruction, hidden in the safety warnings: Do not expose to extreme temperatures, direct sunlight, or despair.
Arthur smiled. He didn't need Fort Collins. He had the manual. He had the buttons. He had the small, stubborn power of setting time himself.
He set the clock to 6:00 AM—a new beginning. Then he stepped outside, the Sharp SPC373 tucked under his arm, to teach his neighbors how to wind their broken watches again.
Table of Contents
1. Introduction
Congratulations on purchasing the Sharp Atomic Clock SPC373! This user manual will guide you through the easy operation and maintenance of your new clock. The Sharp Atomic Clock SPC373 is a highly accurate and reliable timekeeping device that receives atomic time signals from Germany and Japan to ensure precise timekeeping.
2. Features
3. Installation
4. Operating Instructions
5. Atomic Timekeeping
The Sharp Atomic Clock SPC373 receives atomic time signals from Germany (DCF77) and Japan (JJY) to ensure precise timekeeping. The clock automatically synchronizes with the atomic time signal at midnight, 2 AM, 4 AM, 6 AM, and 8 AM every day.
6. Time Zone Setting
The Sharp Atomic Clock SPC373 has a built-in time zone setting. You can set the clock to display the time in one of the following time zones:
To set the time zone:
7. Alarm Setting
The Sharp Atomic Clock SPC373 has a single alarm function. To set the alarm:
8. Snooze Function
The snooze function allows you to temporarily stop the alarm and resume it after a set period.
9. Backlight
The Sharp Atomic Clock SPC373 has a built-in backlight for easy reading in the dark.
10. Troubleshooting
11. Maintenance
12. Specifications
13. Warranty Information
The Sharp Atomic Clock SPC373 is backed by a 1-year limited warranty. For more information, please refer to the warranty card included with your purchase.
| Problem | Possible Cause | Solution | |---------|----------------|----------| | Clock not syncing | Weak WWVB signal | Move clock to a north-facing window at night. Remove from near TV, router, phone charger. | | Wrong hour (off by 1) | DST setting wrong | Check DST setting in manual mode. Set to AUTO. | | Display faint or blank | Low batteries | Replace all batteries with fresh alkalines. | | Alarm doesn't sound | Alarm disabled | Check for bell icon on display. Press ALARM 1 or 2 to re-enable. | | Humidity reads “---” | Sensor error | Remove batteries for 1 minute, reinsert. | | Buttons unresponsive | Unit frozen | Press reset button (pinhole on back) with a paperclip, or remove batteries for 10 minutes. | | Time is off by hours (not minutes) | Time zone set incorrectly | Go to manual setting and verify time zone (P, M, C, E). |
The Sharp SPC373 is a radio-controlled (atomic) mantel clock that automatically synchronizes time using the standard WWVB/NIST signal (North America) or similar longwave time signals where supported. This guide summarizes setup, daily use, features, maintenance, and troubleshooting so you can quickly get accurate timekeeping. Arthur’s fingers trembled as he unfolded the worn
Solution: Perform a manual hand alignment. Remove batteries. Press and hold SET while reinserting batteries. Use ▲/▼ to move hands to the exact 12:00 position, then press WAVE.
Upon inserting batteries: