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Seiko 7K52A, Parts Catalogue /Technical Manual

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Seiko 7K52A Parts Catalogue /Technical Manual Download Page 15

Cal. 7K52A

TECHNICAL GUIDE

 91   Winding stem (with crown)

• Remarks on installing

To remove the winding stem (with crown), pull out the crown to the first click, and then, pull out the
setting lever (“A” portion in the illustration below) while pressing it.

99   Switch lever (A)

• Setting position and lubricating

Yoke

Setting lever

Setting lever

Switch lever (A)

15

“A” portion

 79   Center wheel and pinion

• Lubricating

Lubricate the center wheel and pinion as shown in the illustraiton

89   Train wheel setting lever

90   Setting lever

88   Yoke

Summary of Contents for 7K52A

Page 1: ...meas urement serves as a guideline when the user is making a dive In addition you must fully understand the following This watch is for use in recreational scuba diving no decompression diving and is...

Page 2: ...providing warrantable accuracy Within displayed value x 3 0 5 m Movement size Outside diameter Casing diameter Height 31 0 mm 30 0 mm 5 9 mm Electronic circuit reset switch Train wheel setting device...

Page 3: ...on at the 8 o clock side 14 Hour hand 13 Minute hand 12 Diving time hand 16 Depth hand 17 1 10 m depth hand 18 Small second hand 19 Alarm minute hand 20 Alarm hour hand 15 Maximum depth hand 22 0491 6...

Page 4: ...4 Date dial guard screw 25 4283 612 Depth hand wheel clamp 28 0808 606 Date dial guard 29 1018 610 Setting lever spring for maximum depth hand 32 0012 354 Anti magnetic shield plate screw 34 0810 606...

Page 5: ...block guard 45 0022 230 Sensor clamp screw 46 4283 611 Sensor clamp 42 4225 692 Battery clamp with AC comment sheet 41 0022 230 Battery clamp screw 48 0022 230 Spacer for circuit block screw 49 0439 6...

Page 6: ...idge 63 0950 590 Intermediate alarm wheel 64 0270 610 Center wheel for alarm 67 0241 583 Fourth wheel and pinion 68 0240 610 Second wheel 70 0231 580 Third wheel and pinion 71 0261 612 Minute wheel 72...

Page 7: ...5 4002 690 Coil block for diving time hand 99 4450 690 Switch lever A 98 4450 701 Switch lever B 97 4450 702 Switch lever C 96 4239 693 Rotor stator for 1 10 m depth hand 95 4239 693 Rotor stator for...

Page 8: ...supplied as part of the crown Check the case number and refer to SEIKO Casing Parts Catalogue to choose a corresponding crown The type of date dial is determined based on the design of cases Check th...

Page 9: ...NG THE BATTERY After the battery is replaced with a new one or after the battery is re installed following the repairing procedures be sure to short circuit the AC terminal and the battery connection...

Page 10: ...th hands when the depth hand returns to indicate the average depth the maximum depth hand stays where it was advanced by the depth hand Switch lead terminal A Auto switch terminal 15 Maximum depth han...

Page 11: ...and wheel so that the post of the set ting lever for maximum depth hand is positioned in the slit of the depth wheel A portion Post of the setting lever for maximum depth hand Depth hand wheel B porti...

Page 12: ...xi mum depth hand from the maximum depth hand wheel except when it needs to be replaced with a new one Second intermediate wheel for calendar correction First intermediate wheel for calendar correctio...

Page 13: ...e to use a screwdriver that fits the slot of the pin head Never apply undue force to the pins in turning them using a screwdriver TECHNICAL GUIDE Rodico A portion Circuit block cover B Circuit block c...

Page 14: ...rm 83 4146 612 Step rotor for 1 10 m depth hand 64 0270 610 Center wheel for alarm Before setting the train wheel bridge be sure to check that each wheel is set at the right position and the lower piv...

Page 15: ...hen pull out the setting lever A portion in the illustration below while pressing it 99 Switch lever A Setting position and lubricating Yoke Setting lever Setting lever Switch lever A 15 A portion 79...

Page 16: ...oltage supplied from a battery For the circuit block alone less than 1 4 A with voltage supplied from a battery Before measuring the current consumption be sure to reset the circuit with the tester co...

Page 17: ...tting the alarm hour and minute hands to the current time The alarm hour hand moves correspondingly with the alarm minute hand Simultaneous press of buttons at 2 oclock and 10 oclock sides Resetting t...

Page 18: ...istance test Increasing the pressure More than 15 minutes Pressure value 1 00 kg cm2 3 00 kg cm2 Depth display of Cal 7K52A 8 5 10 5 m 27 5 30 5 m TECHNICAL GUIDE 2 2 18 Pressure Elapsed time Keeping...

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