Seiko 7D46, 7D56, 7D48 manual Time Relay Function, Remarks on Power Save Function

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✽Do not pull the crown out to the second click position while the watch is in power save mode. This will cancel the power save function causing the time data retained in the watch to be erased.

✽Do not leave the watch with its crown being at the second click position, as the watch consumes greater energy than it uses while it is in power save mode.

<Remarks on Power Save Function>

●When the watch is left untouched for approximately 24 hours (approximately one day), the power save function is automatically activated.

✽While the second hand is moving at two-second intervals, the power save function cannot be activated.

●When the power save function is activated, the hour, minute, second and 24- hour hands will stop moving.

✽While the watch is in power save mode, the calendar continues to function normally.

✽When the watch is left untouched in power save mode and if the date does not change correctly, the stored electrical energy is being depleted. Recharge the watch until the watch resumes the usual one-second interval movement, and then reset the time and calendar before starting to wear it again.

✽When the watch wakes up from power save mode while it is running on extremely low electrical power, the second hand starts moving at two-second intervals. (Refer to “IF THE SECOND HAND STARTS MOVING AT TWO-SECOND INTERVALS” on page 19.)

■TIME RELAY FUNCTION

●When the watch is in power save mode, the hands stop moving but the built-in IC continues to calculate the time. When a certain amount of electrical power is generated, the watch hands are adjusted automatically to the time retained inside the watch.

●The operable time of the time relay function varies depending on the electrical energy stored inside the watch. In a case that the fully charged watch enters the power save mode, the time relay function of the watch remains operable for approximately four years.

✽If the stored electrical energy is completely depleted while the watch is in power save mode, swinging the watch will not activate the time relay function. Instead, the second hand starts moving at two-second intervals. (Refer to “HOW TO WAKE UP THE WATCH FROM POWER SAVE MODE” on page 11 or “IF THE SECOND HAND STARTS MOVING AT TWO-SECOND INTERVALS” on page 19. )

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Contents Cal D46, 7D48 & 7D56 Contents Power Save Function and Time Relay Function FeaturesPerpetual Calendar Function Watch remains operable for approximately four yearsBefore Initial USE Power Save FunctionDisplay and Button Operation Time Relay Function Remarks on Power Save FunctionHOW to Operate the Screw Lock Type Crown HOW to Wake UP the Watch from Power Save ModeScrew Lock Type Crown To unscrew the crownSecond click position Original position HOW to SET the Time and CalendarHOW to SET the Time Cal D46 Avoid setting the time or calendar at a time between 2300 HOW to SET the Perpetual CalendarCrown at the first Cal D48 Cal D56Click position Crown at the first click positionEnergy Depletion Forewarning Function HOW to Charge the WatchIf the Second Hand Starts Moving AT TWO Second Intervals Generate power to resume the normal operational movement Power Reserve Guidelines for the Rechargeable BatteryPower to run the watch for approximately one day At a rate of twice a second, making an arc of about 20 cmSpecifications

7D48, 7D46, 7D56 specifications

The Seiko 7D56, 7D46, and 7D48 are notable movements within Seiko's lineup of automatic watches, celebrated for their precision, reliability, and innovative features. These movements are part of the caliber family that showcases Seiko's commitment to quality craftsmanship and ingeniously designed technology.

The Seiko 7D56 is an automatic movement that stands out for its remarkable features, including a date display and day of the week complication, which adds a practical edge to its functionality. The movement utilizes a 21,600 vibrations per hour (vph) frequency, which ensures smooth operation and accurate timekeeping. One of its distinctive aspects is the hacking feature, allowing users to stop the second-hand while setting the time, leading to increased accuracy when syncing with another timepiece.

The 7D46, similar in design to the 7D56, merges functionality with style. It presents a sleek profile and appeals to those who appreciate both classic and contemporary aesthetics. Like the 7D56, it also includes a date function and operates at a frequency of 21,600 vph. This movement is particularly renowned for its durability and versatility, making it a preferred choice among watch enthusiasts seeking a reliable automatic timepiece.

The 7D48 movement is another esteemed member of this family, often found in Seiko's diverse range of watches. It features a power reserve of approximately 40 hours, making it a dependable option for daily wear. The 7D48 is crafted to be lightweight, which adds to wearing comfort while maintaining its robustness. Like its counterparts, it offers reliable timekeeping with a simple yet elegant design that fits various styles and occasions.

All three movements benefit from Seiko's advanced engineering and design philosophy, which emphasizes longevity and performance. They are crafted using high-quality materials and are meticulously assembled, ensuring that each movement meets the company's rigorous standards. Moreover, the incorporation of a transparent case back in many models allows wearers to appreciate the intricate mechanics at play within these movements.

In summary, the Seiko 7D56, 7D46, and 7D48 movements represent a harmonious blend of functionality, reliability, and aesthetic appeal. They embody Seiko's dedication to innovation while providing watch enthusiasts with exceptional timepieces that cater to diverse preferences and needs. These movements are a testament to Seiko's esteemed position in the world of horology.
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