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PARTS LIST / TECHNICAL GUIDE
ANALOGUE SOLAR Cal. V181A
[SPECIFICATIONS]
Item
3 hands (hour, minute and
second hands)
Motion of the second hand
Driving system
Additional function
Crown operation
Normal position
st click position
Loss/Gain
Regulation system
Gate time for rate measurement
Current consumption
Coil resistance
Power
Power supply
generator
Rechargeable
battery
Operating
voltage range
Power reserve
Number of jewels
Cal. No.
Diameter
Outside: 20.0mm
Casing: 9.4mm
Height: 2.20mm
One-second intervals
Stepping motor piece
Instart-start function
Energy depletion forewarning function (The second hand moves at
two-second intervals.)
Overcharge prevention function
Electronic circuit reset function
Second hand stop function
Free
Time setting
Monthly rate:less than 20 seconds (worn on the wrist at
temperature range between 5 to 35 degrees Centigrade)
Nil
Use 0-second gate
Movement: less than 0.80 μA
Circuit block: less than 0.40 μA
Coil block: .80 - 2.20 KΩ
Solar power generation system
MT66 Manganese titanium lithium rechargeable battery
0.45V - 2.20V
From full charge to stoppage: Approximately 2 months
2 jewels
V181A
Movement
/8
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Summary of Contents for Seiko V181A
- Page 1 PARTS LIST / TECHNICAL GUIDE ANALOGUE SOLAR Cal. V181A [SPECIFICATIONS] Cal. No. V181A Item Movement Diameter Outside: 20.0mm Casing: 9.4mm 3 hands (hour, minute and Height: 2.20mm second hands) Motion of the second hand One-second intervals Stepping motor piece...
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Page 2: Specifications
SPECIFICATIONS Cal. V181A FEATURES The Cal. V8 is an analogue watch with a solar power generation system. l Solar power generation system The watch operates while charging electricity by converting light received on the dial to electrical energy. It lasts for 2 months after full charge. -
Page 3: Parts List
PARTS LIST Cal. V181A [SOLAR POWER GENERATION MECHANISM] Order of disassembly: Order of assembly: SOLAR CELL UNIT Large: 4025543 Small: 4025575 CONTACT SPRING FOR SOL A R C ELL UNI T 4246644 CASING RING Large: 82840960 Small: 82840940 EARTHING SPRING... -
Page 4: Battery Connection
PARTS LIST Cal. V181A [BATTERY AND ELECTRONIC CIRCUIT RECHARGEABLE - GEAR TRAIN MECHANISM AND STEPPING MOTOR - BATTERY UNIT SCREW SETTING MECHANISM] 0022247 RECHARGEABLE BATTERY UNIT 302729Y CIRCUIT BLOCK COVER SCREW 0022247 CIRCUIT BLOCK COVER 4457923 CIRCUIT BLOCK 4000656 TR AIN WHEEL... - Page 5 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 6 PARTS LIST Cal. V181A l Tools and consumables required for disassembling/reassembling • Movement holder UNIVERSAL MOVEMENT HOLDER (S-682) • Watch oils SEIKO watch oils (AO-3 and AO-2) AO-2 AO-3 6/8...
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Page 7: Technical Guide
TECHNICAL GUIDE Cal. V181A REMARKS ON DISASSEMBLING AND REASSEMBLING THE MOVEMENT l HOW TO REMOVE THE SETTING STEM BEFORE DISMANTLING THE MOVEMENT Crown position: normal position Push the SETTING LEVER gently (refer to the Fig. ) in order to disengage it from the SETTING STEM. Then pull out the crown with the stem completely. - Page 8 Cal. V181A TECHNICAL GUIDE () SOLAR CELL UNIT The positions of a hook for the SOLAR CELL UNIT are different for a large size one (a, b, c and d in Fig. 4) and a small size one (a, b and c in Fig. 5). Following illustrations show their positions for each size of the SOLAR CELL UNIT.
- Page 9 TECHNICAL GUIDE Cal. V181A (3) EARTHING SPRING The EARTHING SPRING is fixed to the CASING RING with its two hooks (a and b in Fig. 8). Please release them when disassembling the spring from the CASING RING. Fig. 8 MOVEMENT...
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Page 10: Fifth Wheel
Cal. V181A TECHNICAL GUIDE GEAR TRAIN MECHANISM - WHEEL ASSEMBLY POSITION AND LUBRICATION INSTRUCTIONS 3) FOURTH WHEEL 6) STEPPING ROTOR 4) THIRD WHEEL 7) MINUTE WHEEL FIFTH WHEEL 8) SETTING WHEEL FOURTH WHEEL SETTING WHEEL SETTING WHEEL FIFTH WHEEL THIRD WHEEL... - Page 11 BATTERY CONNECTION (+) Fig. 7 * When measuring the current consumption using the SEIKO digital multi-tester (S-860), use the range of 40μA of SUPPLY V (=.55V) & GATE TIME (2S). Fig. 8 3) Wait until a stable measurement becomes available. It usually takes 30 seconds to a few minutes for getting a stable measurement.
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Page 12: Circuit Block
CIRCUIT BLOCK (please refer to the "Structure of the CIRCUIT BLOCK" below). * When measuring the current consumption using the SEIKO digital multi-tester (S-860), use the range of 40μA of SUPPLY V (=.55V) & GATE TIME (2S). * Avoid exposing the CIRCUIT BLOCK to direct light in order to obtain the correct measurement. - Page 13 CIRCUIT BLOCK COVER (as illustrated in Fig.2). Fig. 2 * When measuring the voltage using the SEIKO digital multi-tester (S-860), use the range of mV (Fig. 22). Fig. 22 4) Expose the watch to the light of a fluorescent lamp (use the one with 5 to 20 watts) at a distance of 5 cm while connecting the probes to the watch (Fig.
- Page 14 Fig. 24 ( Large size ) Fig. 25 ( Large size ) * When measuring the voltage using the SEIKO digital multi-tester (S-860), use the range of mV (Fig. 26). Fig. 26...
- Page 15 TECHNICAL GUIDE Cal. V181A CHECKING THE INSTANT-START FUNCTION The instant-start function works when the voltage of the rechargeable battery is more than 0.9V. Therefore, please measure the battery voltage and make sure that the battery is ready for checking the instant-start function.
- Page 16 Cal. V181A TECHNICAL GUIDE CHECKING THE RECHARGING FUNCTION In order to check the recharging function, measure the voltage of the rechargeable battery before and after recharging. If the voltage increases to a certain extent, it shows that the recharging function is working properly.
- Page 17 TECHNICAL GUIDE Cal. V181A CHECKING THE GENERAL FUNCTION Operation Function Checkpoint Pull out the crown to the st click Setting mechanism - Make sure that it has and push it back switching the a click at each in to the normal...
- Page 18 Cal. V181A TECHNICAL GUIDE CHECKING THE WATER RESISTANCE 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) 3 BAR Air leak test WATER RESIST 5BAR...
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