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PARTS CATALOGUE / TECHNICAL GUIDE
[SPECIFICATIONS]
Item
Movement
Outside diameter
Movement
Casing diameter
size
Height
Time indication
Driving system
Display system
Additional mechanism
Loss/gain
Regulation system
Measuring gate by quartz tester
Battery
Jewels
Cal. H024A
Cal. No.
ø31.0 mm
29.0 mm between 3 o'clock and 9 o'clock sides
28.5 mm between 12 o'clock and 6 o'clock sides
ø30.0mm
29.0 mm between 3 o'clock and 9 o'clock sides
28.5 mm between 12 o'clock and 6 o'clock sides
5.5 mm
Analogue section
2 hands
(Hour and minute hands)
Step motor, 1 piece
• Time display
• Hour and minute hands, two
hands straight 10-second
increments
Monthly rate within normal temperature range: less than 15 seconds
Nil
Use 10-second gate.
SB-BU (SR1130W)
Battery life is approximately 3 years.
Voltage: 1.55V
2 jewels
H024A
(x 1.2)
Nematic Liquid Crystal, FEM (Field Effect
Mode)
Multiplex driving system
• Time/calendar display
• Hour, minute and second
• Selection of 12h/24h-format indication
• Year, month, date, day of the week and
fully automatic calendar between the year
2006 and 2055
• Stopwatch display
•Hour, minutes, seconds and 1/1000
seconds
• Up to 23 hours 59 minutes 59 seconds and
999
• Data recall function
• Alarm display
• Daily alarm (2 channels)
• Timer
• Up to 23 hours and 59 minutes
• Hourly time signal
—
• Alarm test system
• Sound for button operation confirmation
• Battery life indicator
Digital section
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Summary of Contents for Seiko H024A
- Page 1 PARTS CATALOGUE / TECHNICAL GUIDE Cal. H024A [SPECIFICATIONS] Cal. No. H024A Item Movement (x 1.2) ø31.0 mm Outside diameter 29.0 mm between 3 o’clock and 9 o’clock sides 28.5 mm between 12 o’clock and 6 o’clock sides Movement Casing diameter ø30.0mm...
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Page 2: Parts Catalogue
PARTS CATALOGUE Cal. H024A Disassembling procedures Figs. : Reassembling procedures Figs. : Lubricating : Types of oil Oil quantity Normal quantity (AO-3) Moebius A (AO-2) Moebius F Silicone Oil 500,000 c.s. Case back Piezoelectric element Case back gasket Case ring... - Page 3 PARTS CATALOGUE Cal. H024A Liquid crystal panel frame 4540 366 Battery (See the front page.) Liquid crystal panel Switch spring screw 0012 168 Switch spring Connector 4313 366 Connector guard screw 0012 316 Train wheel bridge screw 0012 168 Train wheel bridge...
- Page 4 PARTS CATALOGUE Cal. H024A Remarks • Discrimination of the hand installation height The caliber H024A has numerals to indicate the hand installation height, which is printed on the dial and movement. Height Standard type Standard type Discrimination Numeral for discrimination...
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Page 5: Technical Guide
TECHNICAL GUIDE Cal. H024A • The explanation here is only for the particular points of Cal. H024A. • For the repairing, checking and measuring procedures, refer to the “TECHNICAL GUIDE, GENERAL INSTRUCTIONS.” STRUCTURE OF THE CIRCUIT BLOCK Input terminal (+) Coil output terminal Input terminal (–) - Page 6 TECHNICAL GUIDE Cal. H024A III. REMARKS ON DISASSEMBLING AND REASSEMBLING Use the universal movement holder for disassembling and reassembling. Hour and minute hands • Remarks on installing After installing the battery in the movement, place the move- ment on a flat metal plate or the like to install the hands.
- Page 7 TECHNICAL GUIDE Cal. H024A IV. VALUE CHECKING • Time accuracy To measure the accuracy, light up all the segments. To do so, press buttons “C” and “D” at the same time in the TIME/CALENDAR SETTING display. After the measurement, press any one of the button “A”, “B”, “C” or “D” to return to the TIME/ CALENDAR display.