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PARTS CATALOGUE / TECHNICAL GUIDE
[SPECIFICATIONS]
Cal. No.
Item
Movement
Movement
Outside diameter
size
Casing diameter
Height
Time indication
(Movement intervals)
Driving system
Additional mechanism
Loss/gain
Regulation system
Measuring gate by quartz tester
Battery No.
Battery
Voltage
Battery life
Jewels
Cal. 7T82A
Main time: Hour, minute and small second hands (1 second)
• STOPWATCH:
STOPWATCH minute hand (40 minutes)
STOPWATCH second hand
STOPWATCH 1/10-second hand
STOPWATCH 1/100-second hand
Step motor
4 pcs.
• Electronic circuit reset switch
• Train wheel setting device
• Date calendar
• Instant setting device for date calendar
• Battery life indicator (The small second hand moves at two-second
intervals.)
• System reset
• STOPWATCH functions
40-minute measurement in 1/100-second increments, consecutively
measureable up to 120 minutes.
Accumulated elapsed time measurement
Split time measurement
STOPWATCH hand position adjustement
Monthly rate at normal temperature range: less than 15 seconds
Nil
Use 10-second gate.
SR927W
1.55 V
Approx. 3 years
Nil
/26
7T82A
Ø 27.6 mm
Ø 27.0 mm
3.3 mm
(x 1.0)
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Summary of Contents for Seiko 7T82A
- Page 1 PARTS CATALOGUE / TECHNICAL GUIDE Cal. 7T82A [SPECIFICATIONS] Cal. No. 7T82A Item Movement (x 1.0) Ø 27.6 mm Movement Outside diameter size Casing diameter Ø 27.0 mm Height 3.3 mm Main time: Hour, minute and small second hands (1 second)
- Page 2 Cal. 7T Series watches. As a result of this structure change, the battery life of Cal. 7T82A has increased to 3 years as com- pared with that of the other Cal. 7T series watches.
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Page 3: Necessary Procedure After Battery Change
REMARKS ON REPAIRING CAL. 7T82A II. NECESSARY PROCEDURE AFTER BATTERY CHANGE After installing the battery, reset the built-in integrated circuit, and then set the time and reset the STOPWATCH hands to the "0" position following the procedure below. Pull out to the 2nd click when the small second hand is at the Crown 12 o’ clock position. -
Page 4: Parts Catalogue
PARTS CATALOGUE Cal. 7T82A Disassembling procedures Figs. : Reassembling procedures Figs. : * For the type of oil and quantity of lubrication, refer to the following TECHNICAL GUIDE section. Remarks on removing the winding stem To remove the winding stem when taking... - Page 5 PARTS CATALOGUE Cal. 7T82A 4259 509 Anti magnetic shield plate B 0022 230 Battery clamp screw (3 pcs.) 3013 250 (SR927W) Battery 0022 230 0022 459 Battery clamp screw Circuit block cover screw ( 3 pcs.) 4225 546 Battery clamp 0022 459...
- Page 6 PARTS CATALOGUE Cal. 7T82A 4270 710 Battery connection (–) 0027 974 Pin for train wheel bridge 0125 509 Train wheel bridge 0240 580 Small second wheel 0888 582 Chronograph second counting wheel 0241 583 Fourth wheel & pinion 0701 580 Fifth wheel & pinion 0231 580 Third wheel &...
- Page 7 PARTS CATALOGUE Cal. 7T82A 0281 580 Setting wheel 0885 593 Chronograph intermediate wheel for 1/10 second 0282 585 Clutch wheel 0221 583 Center wheel & pinion 4002 700 Coil block (A) 4002 700 Coil block for chronograph second 0391 591 Train wheel setting lever...
- Page 8 PARTS CATALOGUE Cal. 7T82A The correct parts for the followings are determined based on the design of cases. Check the case number, and refer to "Watch Parts Catalogue CD-ROM" to choose corresponding parts. Holding ring for dial (0866 651) ✳ Date dial...
- Page 9 Cal. 7T8 2 A TEC HNICA L GU IDE PROCESS ILLUSTRATIONS AND SPECIAL INSTRUCTIONS ETC. Assembling the switching unit and Lubricate the contact area between the small Lubricate the lower pivots of the rotors: Moebius F or AO-2 wheels second wheel and main plate: Moebius F or AO-2 Set the main plate.
- Page 10 Cal. 7T8 2 A TEC HNICA L GU IDE PROCESS ILLUSTRATIONS AND SPECIAL INSTRUCTIONS ETC. Set the switch lever B. 50, 49 47, 46 Set the coil block for chronograph second and the coil block (A). Rotor stator for chronograph second : 2.10 K 2.70 K...
- Page 11 Cal. 7T8 2 A TEC HNICA L GU IDE PROCESS ILLUSTRATIONS AND SPECIAL INSTRUCTIONS ETC. Set the center wheel & 38,37,36,35 Set the chronograph rotor for 1/100 second, chronograph rotor for second, chronograph Set the center wheel & pinion and lubricate as pinion and lubricate its illustrated below.
- Page 12 Cal. 7T8 2 A TEC HNICA L GU IDE PROCESS ILLUSTRATIONS AND SPECIAL INSTRUCTIONS ETC. Lubricate the switching unit. Point of contact between the train wheel setting lever and yoke. Point of contact in Lubricate the point of contact between the train wheel the tail portion of the setting lever and yoke.
- Page 13 Cal. 7T8 2 A TEC HNICA L GU IDE PROCESS ILLUSTRATIONS AND SPECIAL INSTRUCTIONS ETC. Set the chronograph second intermediate Set the chronograph first intermediate wheel for second. Set the small second wheel. wheel for second. Set the spacer for center 25,24 Set the fifth wheel and pinion and Dark green wheel &...
- Page 14 Cal. 7T8 2 A TEC HNICA L GU IDE PROCESS ILLUSTRATIONS AND SPECIAL INSTRUCTIONS ETC. Set the train wheel <20> Set the train wheel bridge. bridge. Lubricate the upper pivots of the chronograph rotor for 1/100 second, chronograph rotor for second, chronograph rotor for minute and step rotor Moebius F or AO-2 Lubricate the upper pivot of each rotor (at four points) illustrated below.
- Page 15 Cal. 7T8 2 A TEC HNICA L GU IDE PROCESS ILLUSTRATIONS AND SPECIAL INSTRUCTIONS ETC. Assembling the Set the friction spring for circuit unit 17 Set the circuit block. second counting. Make sure that the circuit block is securely engaged with the two Set the circuit block.
- Page 16 Cal. 7T8 2 A TEC HNICA L GU IDE PROCESS ILLUSTRATIONS AND SPECIAL INSTRUCTIONS ETC. Set the battery clamp. Tighten the battery clamp screws. (3 positions) 12 Set the battery clamp. Measure the current consumption. 11 Tighten the battery clamp screws. (3 positions) 16/26...
- Page 17 Cal. 7T8 2 A TEC HNICA L GU IDE PROCESS ILLUSTRATIONS AND SPECIAL INSTRUCTIONS ETC. Assemb lin g the cal enda r unit. <7> <8> Set the hour wheel. Set the chronograph 1/10 second counting wheel. Set the hour wheel. The hour wheel is made of plastic.
- Page 18 Cal. 7T8 2 A TEC HNICA L GU IDE PROCESS ILLUSTRATIONS AND SPECIAL INSTRUCTIONS ETC. Set the date dial guard. Lubricating points of the calendar wheels: contact points between Set the jumper. Date dial and date jumper Moebius F or AO-2 Main plate and date jumper: Moebius F or AO-2 <1>...
- Page 19 Cal. 7T8 2 A TEC HNICA L GU IDE PROCESS SPECIFICATIONS (QUALITY SPECIFICATIONS, ILLUSTRATIONS AND SPECIAL INSTRUCTIONS ETC. HANDLING METHODS ETC.) Assemb lin g the cas e Set the battery. Pay extra attention so as not to short-circuit the battery. 10 Set the battery.
- Page 20 Cal. 7T8 2 A TEC HNICA L GU IDE PROCESS SPECIFICATIONS (QUALITY SPECIFICATIONS, ILLUSTRATIONS AND SPECIAL INSTRUCTIONS ETC. HANDLING METHODS ETC.) T82 A 1/ –seco nd chro nogr aph (12 o’clock position) Set the STOPWATCH 1/10-second hand. Set the STOPWATCH 1/100-second hand.
- Page 21 Cal. 7T8 2 A TEC HNICA L GU IDE PROCESS SPECIFICATIONS (QUALITY SPECIFICATIONS, ILLUSTRATIONS AND SPECIAL INSTRUCTIONS ETC. HANDLING METHODS ETC.) Pull out the crown temporarily to the first click position when removing Remove the Be careful so as not to deform the winding stem conducting spring of the circuit block cover while the winding stem.
- Page 22 Cal. 7T8 2 A TEC HNICA L GU IDE Functional Inspection Operational Specifications (Reference) 7T82 Rotation Button to press Normal Free Button A STOPWATCH START STOP position Button B STOPWATCH RESET SPLIT SPLIT RELEASE First Clockwise: Button A STOPWATCH START STOP click Date setting Button B STOPWATCH RESET SPLIT SPLIT RELEASE...
- Page 23 Cal. 7T8 2 A TEC HNICA L GU IDE SPECIFICATIONS (QUALITY SPECIFICATIONS, ILLUSTRATIONS AND SPECIAL INSTRUCTIONS ETC. PROCESS HANDLING METHODS ETC.) Affix the AC For instructions on where to affix the sticker, refer to the illustration at com ment sti c ke r. the right.
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Page 24: Technical Guide
TECHNICAL GUIDE Cal. 7T82A IV. VALUE CHECKING ● Coil block resistance 2.10 KΩ ~ 2.70 KΩ Coil block (A) (4002 700) Coil block for chronograph second (4002 700) 2.10 KΩ ~ 2.70 KΩ Coil block for chronograph minute (4002 711) 1.80 KΩ ~ 2.40 KΩ... -
Page 25: Troubleshooting
TECHNICAL GUIDE Cal. 7T82A V. TROUBLESHOOTING Symptom Possible causes Solutions Measure the bat ter y voltage. Movement The watch stops operat- The battery has been depleted. Replace the battery with a new ing. one. The hour wheel and the pinion of... - Page 26 TECHNICAL GUIDE Cal. 7T82A Symptom Possible causes Solutions Measure the coil block resist- One or more STOPWATCH The relevant coil is broken. STOPWATCH hands have stopped mov- ance. Replace the coil with a new ing or show an abnormal one if necessary.
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