Epson VR43B User manual

Watch Movement Specification and Drawing
SOLAR SERIES
Cal. VR43B
Movement Size
Casing Diameter
Height
Running Time
13 1/2’’’
Ø 30.6mm
4.52mm
Approx. 4 months

Date: 21/May/'21
Cal. VR43B
Items Rev. Page
Features 00 1
Specifications 01 2
Appearance 00 3
Casing 00 4
Hand fitting-01 01 5-01
Hand fitting-02 01 5-02
Hand setting stem 00 6
Dial 00 7
Casing ring 00 8
Solar cell unit 00 9
Attention-01 01 10-01
Attention-02 00 10-02
Attention-03 00 10-03
Operation-01 00 11-01
Operation-02 00 11-02

Date :
1.Solar-powered watch
light into '' electrical energy'' and store the power in a secondary battery.
2. Eliminating the need for battery replacement
need for battery replacement.
3. You can use the dial which light transmittance is more than 30%
It is possible to assemble the dial which transmits light on the solar cell.
It enabled to cover the solar cell color, and you can design variety colors of dials.
4. Running time
Expected running time from full charge to stoppage will be around 4 months.
5. Power depletion warning function
The two-second intervals movement of the second hand is a signal of energy depletion.
The watch continuous running time after two-second intervals movement is approximately 2 weeks.
6. Over charge prevent function is equipped
If the secondary battery is charged more than predetermined voltage, over charge prevent function is
operated to prevent the secondary battery deterioration and breakage.
7. Structure of the separated parts
Unlike conventional
q
uartz watches, this watch does not use a silver oxide batter
y
, thus eliminatin
g
the
This watch is a solar-
p
owered watch containin
g
a solar cell underneath the dial to convert an
y
form of
Cal.
VR43B Features
19/Oct./'18
Rev. : 00
Solar cell unit
Solar cell
Holding ring for dial
Solar cell lead terminal
Movement
Hand setting stem
Secondary battery unit
P. 1

Date :
1. MOVEMENT DIMENSIONS
Outside diameter φ31.20mm × 28.00mm(3-9H)
Casing diameter φ30.6mm
Total height 3.97mm (Including solar cell : 4.52mm)
2. TIME STANDARD
Type of quartz oscillator Tuning fork
Frequency of quartz oscillator 32,768 Hz
Accuracy ±20 seconds per month (on wrist)
Operating temperature range －5℃ to ＋50℃
Regulation device Nil (Pre-adjusted)
3. INDICATOR / FUNCTIONS
3 Hands Hour / Minute / Second
Small hands 24 hour(12H) / Second chronograph(6H) / Minute chronograph(9H)
Calendar Instant setting device for date calendar
Reset switch
Power depletion warning function
(Second hand moves at 2-second intervals when voltage is 1.2V)
Running time Approx. 4 months (After fully charged)
Setting mechanism Crown at normal position : Free
Crown pulled out 1st click : Instant date change
Crown pulled out 2nd click : Time setting / Reset
Chronograph 1/1 second up to 30 minutes with split time measurement
Battery indicator Push 4h button (more than 1second)
4. FEATURES
Jewels 0 Jewels
Anti-magnetism Over 1600A/m (Direct current magnetic field)
Driving current consumption Approx. 1.45μA (1.4V,chronograph non-operates)
Operation stopping voltage 1.2V(Chronograph function)
Solar cell type Amorphous silicon solar cell
Maximum unbalance of hands Hour hand : 0.6μN・m
Minute hand : 0.9μN・m
Second hand : 0.09μN・m
24 hour hand : 0.05μN・m
Second chronograph hand : 0.05μN・m
Minute chronograph hand : 0.05μN・m
Moment of inertia Second hand : less than 0.25 μg・m²
Second chronograph hand : less than 0.05 μg・m²
5. SECONDARY BATTER
Y
Type Lithium metal batteries
Size φ9.5mm ×t 2.05mm
Nominal voltage 1.5 V
Capacit
y
5.5 mAh
6. SEPARATED PARTS (Parts code)
Hand setting stem 0351578 or 0351177
Secondary battery unit 302334R
Solar cell unit 4020527
Solar cell lead terminal (2pcs) 4281516
7. TEST OF ACCURAC
Y
Equipment to be used SEIKO quartz tester QT-99,
Greiner quartz timer-C , Witschi Q-tester 4000
Duration of measurement 10 seconds
Microphone to be used Electromagnetic detection type
All specifications are subject to change without notice.
Cal.
Solar Quartz 13 1/2''' Chronograph Movement
VR43B
Rev. : 01
21/May/'21
Specifications
P. 2

Date :
1. Attention for solar cell unit
Pay attention not to touch and scratch the surface of the solar cell.
2. Dial trans
p
arenc
y
rate
Keep the transparency rate of the dial more than 30%.
(Effective aperture is φ27mm)
Each elements of solar cell must be kept the transparency rate.
3. The
g
uideline of char
g
in
g
time is as in below
(Dial transparency rate = 30%)
700 Inside the office ― 69
3,000 30W 20cm 52 15
10,000 Cloudy 16 5
100,000 Fine weather 5.3 2
Condition A : Time required for full charge
Condition B : Time required for steady operation
Condition C : Time to charge 1 day of power
4. How to set the secondar
y
batter
y
unit
Please set the exclusive secondary battery unit.
(The secondary battery is Lithium metal batteries without any environmentally harmful substances.)
Please install the minus part of the secondary battery towards inside of the watch.
If the silver oxide battery is accidentally set and charged, there is a possibility of battery explosion.
To prevent from the battery explosion, it is adopted safety structure not to charge the silver oxide battery
even if it is accidentally set.
Install the secondary battery unit under the circuit block cover as illustrated below A and B.
Check whether the secondary battery lead plate is surely connected to minus terminal. (Refer to the Fig.[2])
C
(Approx.
Minutes)
A fluorescent lamp 18
4
Illumination
(Lx) Source of light Environment
A
(Approx.
Hours)
B
(Approx.
Hours)
Cal.
VR43B Attention-01
21/May/'21
Rev. : 01
Sun light 1.5
0.5
Fig.[1]
A
B
Fig.[2] (Detail of A)
minus terminal
secondary battery
lead plate
P. 10-01

Date :
5. How to remove the setting stem
When removing the setting stem,put the setting stem at normal position and push the ''setting lever'' by
tweezers. (Refer to the Fig.[3].)
The ''setting lever'' can not be push if the setting stem is not at normal position.
6. Attention of casing part structure
Use the specified holding ring for dial to prevent rotation of the movement inside of the case in order to
stabilize the button operation.
Refer to the [Solar cell unit] page instruction as to the shape and tolerance.
Use the metal case to prevent from the movement malfunction by static electricity.
7.How to set the hands
Each hand moves at step interval. Set the each hand at correct position according to the scale on the
dial in order not to make a mistake in reading time.
Do not turn the hand forcibly.
8.How to remove the hands
When removing the hands, use exclusive fork-shaped tools.
Do not remove the dial under the condition that any hands are set.
When set and remove the hour hand repeatedly, it may reduce the hand fixing torque because the hour
wheel is made by plastic.To ensure the enough fixing torque, it isn't recommended to re-assemble
the hour hand more than five times.(Type M only)
9. Caution
When charging the watch, do not place it too close to fluorescent lamp or other light sources as the watch
temperature will become extremely high, causing damage to the parts inside the watch.
10. How to set the solar cell lead terminal
Please set 2pcs of solar cell lead terminals in accordance with this illustration.
As to the solar cell lead terminal shape, there is no distinction between upper and lower.
11. How to set the solar cell unit
Push above part of each hook on the solar cell unit into main plate certainly.
Cal.
VR43B Attention-02
19/Oct./'18
Rev. : 00
Fig.[3]
P. 10-02

Date :
12.How to set the dial
The dial is held by the four guide poles on the solar cell unit.
13. Button position
Please keep the clearance between the movement and the tip of button to prevent the interference
in assembling and enable to be cased smoothly.
To keep the clearance,it is recommended to use button spring.
Cal.
VR43B Attention-03
19/Oct./'18
Rev. : 00
Button
Clearance
1515
(From movement center)
P. 10-03

Date :
0 click 1st click
Crown Free Turn counterclockwise for
date change
2H button Chronograph Start/Stop
Restart
Chronograph Start/Stop
Restart
Chronograph Reset
Split
Split release
Chronograph Reset
Split
Split release
Battery indicator[*1]
(Press more than 1 second)
Battery indicator[*1]
(Press more than 1 second)
Chrono
g
ra
p
h function
The chronograph can measure up to 30 minutes in 1/1 second increments.
When the measurement reaches 30 minutes, the chronograph automatically stops counting.
Standard measurement
Accumulated elapsed time measurement
Split time measurement
Measurement of two com
p
etitors
4H button Chronograph hands 0-setting
(counterclockwise)
Time setting
Chronograph hands 0-setting
(clockwise)
Cal.
VR43B
Crown position
2nd click
Operation-01
19/Oct./'18
Rev. : 00
Start Stop
2H button 2H button
Reset
4H button
Start Split Split release
2H button 4H button 4H button 2H button 4H button
Reset
Stop
Measurement and release of split time
can be repeated by pressing 4H button.
Start Finish time
of 1st competitor
2nd competitor
finishes
2H button 4H button 2H button 4H button 4H button
Reset
Finish time
of 2nd competitor
0→1 →2
2H button
4H button
Minute hand
Second hand
Minute chronograph hand Crown
Hour hand
Second chronograph hand
24 hour hand
Start Stop
2H button 2H button 2H button 2H button 4H button
Restart and stop of the chronograph
can be repeated by pressing 2H button.
Reset
Restart Stop
P.11-01

Date :
Battery indicator
Press 4H button more than 1 second. The remaining battery capacity is indicated.
Status indication is 2 seconds.Then it return automatically.
Battery indicator and duration
Battery level Power reserve
19/Oct./'18
Rev. : 00
Middle 30-90 days
Low 30 days or less
Cal.
VR43B Operation-02
Display
High 90 days or more
position:35seconds
position:40seconds
position:45seconds
P.11-02