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Parts Catalogue / TECHNICALGUIDE
[SPECIFICATIONS]
Cal. No.
Item
Movement
Outside diameter
Movement size
Casing diameter
(mm)
Total height
Time indication
Driving system
Additional mechanism
Original
Crown Operation
First click
Accuracy
Loss/gain
Measuring gate by quartz tester
Battery No.
Battery
Voltage
Battery life
Number of jewels
Cal. 6G27A
● 24 cities (12H)
● Second setting device
● Electronic circuit reset switch
● Free
● Tiime setting (turn clockwise to move forward and counterclockwise to move back）
Less than 15 seconds: Monthly rate at normal temperature range
6G27A
Ф23.7mm
Ф23.3mm
3.45mm
2 hands (hour, minute)
Step motor
Nil
10-second gate
SR626SW (Silver oxide battery)
1.55V
Approx. 3 years
Nil
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Table of Contents
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Summary of Contents for Seiko 6G27A
- Page 1 PARTS CATALOGUE / TECHNICALGUIDE Cal. 6G27A [SPECIFICATIONS] Cal. No. 6G27A Item Movement Ф23.7mm Outside diameter Movement size Ф23.3mm Casing diameter (mm) Total height 3.45mm Time indication 2 hands (hour, minute) Driving system Step motor ● 24 cities (12H) ● Second setting device Additional mechanism ●...
- Page 2 PARTS CATALOGUE Cal.6G27A ⇒ Disassembling procedures Figs. Lubricating : Types of oil Oil quantity ⇒ Moebius A (AO-3) Normal quantity Reassembling procedures Figs. Moebius Ｆ (AO-2) Hour , Minute hands Small second , 24Hour hands Dial 0022 247 Support for dial side parts screw...
- Page 3 PARTS CATALOGUE Cal.6G27A ⇒ Disassembling procedures Figs. Lubricating : Types of oil Oil quantity ⇒ Reassembling procedures Figs. Moebius A (AO-3) Normal quantity Moebius Ｆ (AO-2) *Refer to the 10pages for the each parts code Battery 0012 168 Battery connection (+) screw...
- Page 4 PARTS CATALOGUE Cal.6G27A REMARKS ●Discrimination of the hand installation height Cal.6G27A watch has numerals printed on the dial and the movement to indicate the installation heights. When repairing, refer to the table below. Number for Center wheel and pinion Hour wheel...
- Page 5 TECHNICAL GUIDE Cal.6G27A Ⅰ. Remarks on disassembling and assembling (1)Winding stem ・ How to remove While pushing the indented portion of the arrow pull out the winding stem. Push (2)Battery ・ How to install Insert the battery aslant in the direction shown by the arrow.
- Page 6 TECHNICAL GUIDE Cal.6G27A Ⅱ. VALUE CHECKING Contact OUT 1 & OUT 2 ● Coil block resistance (see illustation below) (see illustration below) 1.7 - 1.9 µO For the whole movement Less than 1.18 µA ● Current consumption circuit block For the circuit block alone Contact VDD(+) &...
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