Seiko 5M54A Technical Manual
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Seiko 5M54A Technical Manual

Seiko 5M54A Technical Manual

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PARTS LIST/ TECHNICAL GUIDE
[SPECIFICATIONS]
Item
• 3 hands
• Calendar
Interval of hands movements
Driving system
Additional function
Normal position
Crown operation
1st click position
2nd click position
Loss/Gain
Regulation system
Gate time for rate measurement
Current consumption
Coil resistance
Power generator
Rechargeable
Power supply
Operating
voltage range
D u r a t i o n o f
charge
Number of jewels
KINETIC Cal. 5M54A
Cal. No.
(Hour/Minute/Second)
Date (date dial)
Day (retrograde day indicator)
1 second
Stepping motor 2 pieces
• Power reserve indicator (second hand)
• Energy depletion forewarning function
• Overcharge prevention function
• Electronic circuit reset function
• Day and date correction function
• Second hand stop function
Free
Day and date setting
Time setting (Hour and Minute)
Monthly rate: less than 15 seconds (worn on the wrist at temperature
range between 5 and 35 ºC)
Nil
Use 10-second gate
Movement:
Circuit block:
Coil block:
Generating coil block:
Automatic generating system
TC 920 Titanium carbon lithium rechargeable battery
battery
0.45V - 2.20V
From full charge to stoppage: approximately 6 months
6 jewels
5M54A
Movement
•　Deameter
Outside : Ø 27.6 mm Casing : Ø 27.0 mm
•
Height: 4.3 mm
less than 0.80 µA
less than 0.20 µA
1.70 - 2.10 KΩ
280 - 380Ω
1/22

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Summary of Contents for Seiko 5M54A

  • Page 1 PARTS LIST/ TECHNICAL GUIDE KINETIC Cal. 5M54A [SPECIFICATIONS] Cal. No. 5M54A Item Movement •　Deameter • 3 hands (Hour/Minute/Second) Outside : Ø 27.6 mm Casing : Ø 27.0 mm • Calendar Date (date dial) • Height: 4.3 mm Day (retrograde day indicator)

  • Page 2: Specifications

    Cal. 5M54A is equipped with a power reserve indicator. The current power reserve can be checked by reading the posisiton of the second hand after pressing the button at the 2 o'clock position.

  • Page 3: Parts List

    PARTS LIST Cal. 5M54A Disassembling procedures Figs. : Reassembling procedures Figs. : Lubricating: Types of oil Watch Oil AO-3 Watch Oil AO-2 SEIKO Watch Oil S-6 Silicone oil 500,000 c.s. Oil quantity Normal quantity [CASING PARTS ASSEMBLY] CASE BACK CASE BACK GASKET 4281500...
  • Page 4 PARTS LIST Cal. 5M54A [CALENDAR MECHANISM/ DIAL AND HANDS SETTING] HOUR, MINUTE AND SECOND HANDS RETROGRADE DAY HAND DIAL 4408564 SPACER FOR DIAL 0866780 HOLDING RING FOR DIAL 0012354 DAY LEVER GUARD SCREW 0837503 DAY LEVER GUARD 1002516 DAY WHEEL...
  • Page 5 PARTS LIST Cal. 5M54A [AUTOMATIC GENERATING 0022490 MECHANISM/ELECTRONIC OSCILLATING WEIGHT SCREW CIRCUIT] 0500663 OSCILLATING WEIGHT 1002662 OSCILLATING WEIGHT WHEEL 0022247 RECHARGEABLE BATTERy CLAMP SCREW 4225519 RECHARGEABLE BATTERy CLAMP 4216519 INSULATOR FOR RECHARGEABLE BATTERy 302344Z RECHARGEABLE BATTERy UNIT 0022247 CIRCUIT BLOCK COVER SCREW...
  • Page 6 PARTS LIST Cal. 5M54A [GEAR TRAIN MECHANISM/ 0022247 TRAIN WHEEL BRIDGE SCREW SETTING MECHANISM] 0125661 TRAIN WHEEL BRIDGE 0391660 TRAIN WHEEL SETTING LEVER 4271515 RECHARGEABLE BATTERy CONNECTION (+) 0241667 FOURTH WHEEL AND PINION 0231530 THIRD WHEEL AND PINION 0701670 FIFTH WHEEL AND PINION...
  • Page 7 How to find the correct parts, if not determined by 4 digit caliber number Following parts are determined based on the design of watches, such as hands height, dial color, and design of cases. Please refer to the SEIKO WATCH PARTS CATALOGUE in order to choose corresponding parts.
  • Page 8 PARTS LIST Cal. 5M54A l How to discriminate resembled parts 36 RECHARGEABLE BATTERy UNIT Though the RECHARGEABLE BATTERy UNIT for Cal. 5M54 and 5M6 Series is of a completely different type from the CAPACITOR UNIT for Cal. 5M4 Series, they have a close resemblance in shape.

  • Page 9: Circuit Block

    PARTS LIST Cal. 5M54A 39 CIRCUIT BLOCK 4000732 The CIRCUIT BLOCK for Cal. 5M54 and 5M6 Series and that for Cal. 5M4 Series have a close resemblance in shape. They can be discriminated in the point that the CIRCUIT BLOCK for Cal. 5M54 and 5M6 Series has no diode element unlike that for Cal.
  • Page 10 PARTS LIST Cal. 5M54A l Tools and consumables required for disassembling/reassembling • Movement holder Universal movement holder (S-682) • watch oils SEIKO watch grease (S-6) and watch oils (AO-3 and AO-2) AO-3 AO-2 10/22...
  • Page 11 TECHNICAL GUIDE Cal. 5M54A reMarks on dissaseMblinG and reasseMblinG tHe MoveMent l How to remove the SETTING STEM before dismantling the movement Crown position: 1st click position Push the SETTING LEVER gently (refer to the picture on the right) in order to disengage it from the SETTING STEM.
  • Page 12 TECHNICAL GUIDE Cal. 5M54A l Gear train mechanism - train wheels, setting position and lubricating 53 FOURTH WHEEL AND PINION 54 THIRD WHEEL AND PINION 55 FIFTH WHEEL AND PINION 56 STEP ROTOR 57 MINUTE WHEEL 58 SETTING WHEEL 64 CENTER WHEEL AND PINION •...
  • Page 13 TECHNICAL GUIDE Cal. 5M54A l Automatic generating mechanism • How to remove Insert the tip of tweezers into the “C” “A” portion ﾒBﾒ portion portion gap in the illustration at right, and pry up the RECHARGEABLE BATTERy UNIT to remove it.
  • Page 14 TECHNICAL GUIDE Cal. 5M54A reMarks on de-casinG/casinG/dial and Hand settinG l How to set the retrograde day hand at the first day position Make sure the DAy LEVER and the DAy STAR WHEEL are at the 1st day position by listening the sound when changing the day.
  • Page 15 TECHNICAL GUIDE Cal. 5M54A l How to remove/install the contact point spring CONTACT POINT SPRING The CONTACT POINT SPRING has three hooking portions bent downward. It is fixed by inserting the hooking portion “A” into a gap between the MAIN PLATE and HOLDING RING FOR DIAL and inserting “B”...
  • Page 16 CIRCUIT BLOCK COVER. “a” portion * When measuring the current consumption using the SEIKO digital multi-tester (S-860), use the range of 40 μ A of SUPPLY V (= 1.55 V) & GATE TIME (2 S) 16/22...
  • Page 17 TECHNICAL GUIDE Cal. 5M54A 3. Swing the OSCILLATING WEIGHT as the illustration for more than three seconds so that the movement detects the electricity generation and it turns to the normal hand movement mode. Note: When swinging the OSCILLATING WEIGHT, take care so as not to touch the probes of the tester.
  • Page 18 (+) or negative (-) input terminal of the CIRCUIT BLOCK (please refer to “Structure of the circuit block” below). * When measuring the current consumption using the SEIKO digital multi-tester (S-860), use the range of 40 μ A of SUPPLY V (= 1.55 V) & GATE TIME (2 S) 2.

  • Page 19: Function Check

    TECHNICAL GUIDE Cal. 5M54A l Value checking • Coil resistance (coil blocks) Check the resistance of each COIL BLOCK if they are within the range in the following table. COIL BLOCK 1.7 KΩ - 2.1 KΩ 4002516 GENERATING COIL 280 Ω - 380 Ω...
  • Page 20 TECHNICAL GUIDE Cal. 5M54A Operation Function Checkpoint Pull out the crown to the 2nd Make sure that it has click and push it Setting mechanism - a click at each back in to the switching the position and the normal　...

  • Page 21: Accuracy Test

    TECHNICAL GUIDE Cal. 5M54A l Water resistance test Check the water resistance according to the designated specification of the watch. Marking on the case back Test method Applied pressure WATER RESISTANT (WATER RESIST) Air overpressure test 3 BAR WATER RESIST 5BAR...

  • Page 22: Troubleshooting

    TECHNICAL GUIDE Cal. 5M54A troUblesHootinG Problems Possible causes Methods of repair and checking The OSCILLATING WEIGHT 1) The COIL of the 1) Check the resistance of the rotates at an abnormally high GENERATING COIL BLOCK is GENERATING COIL BLOCK. rate, and no charging is made.

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