BEFORE STARTING REPAIR WORK ON CAL. 5D88A
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3. HOW THE DIRECT DRIVE INDICATOR HAND WORKS
1. Power reserve indicator function
• Except when the crown is being turned to charge the watch, the direct indicator hand functions
as a power reserve indicator which shows how long the watch will keep operating within the
range between the minimum 3 hours and the maximum 1 month.
For more details, refer to
“ How to read the power reserve indicator” below.
• If the direct drive indicator hand indicates the 0 position, the watch will stop operating within 3
hours. When the watch stops, the direct drive indicator hand moves to the standby position to
show that the watch stops operating due to a power shortage.
• T
he direct drive indicator hand constantly displays the most up-to-date amount of stored
power. If the amount of stored power is increased by the wearer’s wrist movement or by the
manual crown windings, the direct drive indicator hand displays the increased amount of power
accordingly. On the other hand, if the watch is left unworn and the stored power is decreased
as the watch consumed some power during the time it is left unworn, the direct drive indicator
hand displays the decreased amount of stored power accordingly.
•
The
maximum amount of power reserve that the watch can store is the amount of power
reserve to keep the watch operating for one month. When more power is generated after the
watch already stores this maximum amount of power, the power generated is not further
accumulated, and the direct drive indicator hand shows the power reserve of one month.
Scale marking
0 1 2 3 4 5 6 7 8 9 10
Indication on dial
0 D
Power reserve display
0 3h 6h 9h 12h 15h 18h 21h 1 day
Scale marking
11 12 13 14 15 16 17 18 19 20
Indication on dial
W
M
Power reserve amount
2 days 3 days 4 days 5 days 6 days 1W 2W 3W
30days
*note 1
How to read the power reserve indicator
*note 1 Even though the continuous operating time reaches one month, the direct drive
indicator hand remains moving to show that the power generating function is
operating.
• T
he scale marking indicates the minimum continuous operating time.
Scale marking Power reserve
3 3 hours (Not shorter than 3 hours and not longer than 6 hours)
13 4 days (Not shorter than 4 days and not longer than 5 days)
17 2 weeks (Not shorther than 2 weeks and not longer than 3 weeks)
20 *note 1
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