Seiko V172A User Manual

PARTS LIST / TECHNICAL GUIDE
ANALOGUE SOLAR Cal. V172A/V174A
[SPECIFICATIONS]
1/24
Item
Cal. No.
V172A/V174A
Power reserve
Driving system
Additional function
Crown operation
Loss/Gain
Regulation system
Number of jewels
Normal position
1st click position
Current consumption
Gate time for rate measurement
Power
supply
Motion of the second hand
Coil resistance
Power generator
Rechargeable battery
Operating voltage range
2nd click position
One-second intervals
Stepping motor 4 pieces
Diameter: Outside 27.6 mm
Casing 27.0 mm
Height: 4.4 mm
3 hands
(hour, minute and small
second hands)
Energy depletion forewarning function (The second hand moves at two-
second intervals.)
Overcharge prevention function
Electronic circuit reset function
Second hand stop function
Date calendar
Instant setting device for date calendar
System reset function
Stopwatch function..........60-minute stopwatch in 1/5-second increments
(Auto stop measuring at 60 minutes)
Accumulated elapsed time measurement
Split time measurement
Single-time alarm function
Stopwatch hand position adjustment
Stopwatch
Time setting, System reset, Setting “0” of stopwatch hand
Monthly rate:less than 15 seconds (worn on the wrist at temperature range
between 5 to 35 degrees Centigrade)
Use 10-second gate
Nil
Solar power generation system
Movement: less than 0.80 μA
Circuit block: less than 0.40 μA
4002 541 1.90 - 2.30 kΩ
(COIL BLOCK) (COIL BLOCK FOR STOPWATCH SECOND)
4002 542 1.75 - 2.15 kΩ
(COIL BLOCK FOR STOPWATCH MINUTE) (COIL BLOCK FOR ALARM)
MT920 Manganese titanium lithium rechargeable battery
0.90V - 2.10V
From full charge to stoppage: Approximately 6 months
Nil
V172A V174A
Date setting(counter clockwise), Time setting of alarm
3 hands
(hour, minute and small second
hands), 24-hour indicator

Seiko V172A Specifications

General

Brand	Seiko
Model	V172A
Movement Type	Quartz
Caliber	V172
Functions	Chronograph, Date
Case Material	Stainless Steel
Band Material	Stainless Steel
Dial Color	Black
Crystal	Hardlex
Water Resistance	100 meters
Battery Life	3 years

Summary

Watch Specifications

Watch Features and Functions

Details the watch's functions including solar power and energy depletion warning.

Charging Time and Precautions

Guidance on charging times and safety advice for charging the watch.

Parts List

Component Diagrams and Part Numbers

Visual breakdown of all watch parts with their respective numbers.

Finding Correct Parts

Guidance on identifying correct parts based on watch design and part numbers.

Tools and Consumables for Servicing

Lists necessary tools and oils for disassembly and reassembly.

Technical Guide - Component Assembly

Hands and Dial Installation

Instructions for removing and installing watch hands and the dial.

Spacer and Solar Cell Assembly

Steps for assembling the spacer for solar cell and the solar cell unit.

Rechargeable Battery Guard and Block Assembly

Procedures for installing the rechargeable battery guard and block.

Circuit Block and Train Wheel Bridge Installation

Guidance on assembling circuit block, conducting plate, and train wheel bridge.

Technical Guide - Inspection and Troubleshooting

Electrical Characteristics Measurement

Procedures for checking coil resistance and current consumption.

Solar Power Generation Checks

Methods to verify the watch's solar power generation capability.

Recharging Function Verification

Steps to test if the rechargeable battery is functioning correctly.

Watch Movement Troubleshooting and IC Reset

Diagnosing and resolving issues with watch movement, including IC reset.