Seiko V110A Installer manual

1
[SPECIFICATIONS]
Cal. No.
Item V110A
Movement
(x 2.0)
Movement
size
PARTS CATALOGUE /TECHNICAL GUIDE
Cal. V110A
15.55 mm between 12 o’clock and 6 o’clock sides
11.80 mm between 3 o’clock and 9 o’clock sides
Outside diameter
15.15 mm between 12 o’clock and 6 o’clock sides
11.80 mm between 3 o’clock and 9 o’clock sides
Time indication Two hands (Moves at 20-second intervals)
Height 2.09 mm
Casing diameter
Driving system Step motor (Load compensated driving pulse type)
Loss/gain Monthly rate at normal temperature range: less than 20 seconds
Regulation system Nil
Measuring gate by quartz tester Use 10-second gate.
Power
supply Solar power systemPower generator
Rechargeable
battery
Expected life per charge From full charge to stoppage: Approx. 5 months
Titanium lithium ion rechargeable battery
Additional mechanism • Electronic circuit reset switch
• Overcharge prevention function
0 jewelsJewels

2
PARTS CATALOGUE
Disassembling procedures Figs. : 1 →26
Reassembling procedures Figs. : 26 →1
Lubricating: Types of oil Oil quantity
Moebius A Normal quantity
Moebius F
➡Please see the remarks on the following pages.
Lubricating of some parts is shown in “II. REMARKS ON DISASSEMBLING AND REASSEMBLING”.
Cal. V110A
0022 221
• Circuit block cover screw (2 pcs.)
• Train wheel bridge screw (1 pc.)
2 Dial
1 Hour and minute hands
3 Case ring
Movement
4 4020 575
Solar cell unit
7 0271 946
Hour wheel
6 0491 735
Dial washer
5 4246 644
Solar cell lead
terminal
Remarks on removing the winding stem
·To remove the winding stem, push the
setting lever using something with a
pointed, as the hole for pushing it is
very small.
·Indoingso,takecarenottodamagethe
circuitblockboardplacednearthehole.

3
PARTS CATALOGUE Cal. V110A
➡Please see the remarks on the following pages.
Lubricating of some parts is shown in “II. REMARKS ON DISASSEMBLING AND REASSEMBLING”.
18 0281 807
Setting wheel
19 0384 806
Yoke
20 0261 808
Minute wheel
8 0022 221
Circuit block cover screw
9 4457 901
Circuit block cover
24 0282 806
Clutch wheel
25 4239 909
Rotor stator
26 0100 969
Main plate
21 0389 909
Setting lever spring
22 0383 806
Setting lever
23 Winding stem
17 0221 967
Center wheel and pinion
16 4146 557
Step rotor
15 0231 811
Third wheel and pinion
14 4002 909
Coil block
13 0125 908
Train wheel bridge
12 0022 221
Train wheel bridge screw
11 3027 26T
Rechargeable battery unit
10 4000 657
Circuit block

4
PARTS CATALOGUE Cal. V110A
Remarks:
3 Case ring 8280 562
The type of case ring is determined based on the design of cases. Check the case number and refer to
“SEIKO Casing Parts Catalogue” to choose a corresponding case ring.
23 Winding stem 0351 861
The type of winding stem is determined based on the design of cases. Check the case number and refer
to “SEIKO Casing Parts Catalogue” to choose a corresponding winding stem.
TECHNICAL GUIDE Cal. V110A
•The explanation here is only for the particular points of Cal. V110A.
•For the repairing, checking and measuring procedures, refer to the “TECHNICAL GUIDE, GENERAL
INSTRUCTIONS”.
I. STRUCTURE OF THE CIRCUIT BLOCK
Coil output terminal
Crystal unit
Input terminal (+)
Input terminal (–)
C-MOS-IC
II. REMARKS ON DISASSEMBLING AND REASSEMBLING
For disassembling and reassembling, be sure to use the universal movement holder.
2 Dial
•How to install
Set the notched portions of the dial to the
guide protrusions “A” and “B” of the case
ring,and check that the dial is fixed in position.
Note: When checking the assembling of the
hands, hold the dial securely as it easily
comes out of position.
Dial
Guide protrusion
“B” of
the case ring
Guide protrusion
“A” of
the case ring

5
TECHNICAL GUIDE Cal. V110A
9 Circuit block cover
3 Case ring
•How to install
·The case ring has two protrusions at the “a”
and“b” portions as shown in the illustration
at right, and it is fixed to the movement by
the protrusions.
·To install the case ring, push it above the
“a”and “b” portions so that the protrusions
catch the movement securely.
“b” portion
“a” portion
Case ring
4 Solar cell unit
•How to remove
Release the four hooking portions marked
with the arrows in the illustration at right from
the main plate, using tweezers or the like.
•How to install
Push the solar cell unit above the four hooking
portions marked with the arrows in the
illustration at right so that they catch the main
plate securely.
Solar cell
➞
➞
➞
➞
Notes:
* When removing or installing the solar cell unit, take care not to damage the solar cell.
* If the solar cell is damaged, its power generating capacity may be greatly decreased. In that case,
check the output voltage for the solar cell unit, following the procedure in the corresponding section
of this guide. If the voltage is not normal, replace the solar cell unit with a new one.
* If the solar cell is soiled, gently wipe it with a soft chamois or the like soaked with alcohol, taking care
not to damage it.
•How to remove
Remove the two circuit block cover screws,
and then, release the two hooking portions
marked with the arrows in the illustration at
right from the main plate.
•How to install
Set the circuit block cover so that the two
hooking portions marked with the arrows in
the illustration at right catch the main plate
securely, and then, tighten the circuit block
cover screws.

6
TECHNICAL GUIDE Cal. V110A
11 Rechargeable battery unit
•How to install
Set the “B” portion of the (–) lead terminal of
the rechargeable battery unit to the groove of
the main plate, and then, set the “A” portion of
the (–) lead terminal to the guide post of the
main plate.
Notes:
* Handle the rechargeable battery unit with care
soasnot toshort-circuitits (+)and(–)terminals.
Otherwise, the rechargeable battery unit will
be deteriorated.
* Never wash the rechargeable battery unit as it
is an electronic part.
Rechargeable battery unit
Guide
post
“A” portion of
the (–) lead terminal
“B” portion of
the (–) lead terminal
Lubricating: : Moebius A : Moebius F
15 Third wheel and pinion
16 Step rotor
17 Center wheel and pinion
18 Setting wheel
20 Minute wheel
•Setting position and lubricating
Refer to the illustrations below for the setting position and lubrication of the respective wheels.
Step rotor Minute wheel
Setting wheel
Center wheel
and pinion
Third wheel
and pinion
Third wheel
and pinion
Step rotor
Center wheel
and pinion
Setting
wheel
Minute wheel

7
TECHNICAL GUIDE Cal. V110A
19 Yoke
21 Setting lever spring
22 Setting lever
Lubricating: : Moebius A
•Setting position and lubricating
Refer to the illustration below for the setting position and lubrication of the respective parts.
• Have the spring portion of the yoke securely
catch the protruded portion of the main plate
(“A” portion in the illustration).
Note: Take care not to install the setting lever
spring upside down. (Refer to the
illustration at right.)
“A” portion
Setting lever spring
Yoke
Spring portion of the yoke
Setting lever
Minute wheel
III. VALUE CHECKING
●Coil block resistance
1.2 KΩ~ 1.6 KΩ
●Current consumption
For the whole movement : Less than 0.22 µA (with voltage supplied from a battery)
For the circuit block alone : Less than 0.16 µA (with voltage supplied from a battery)
1. Remove the solar cell unit.
2. Remove the rechargeable battery unit, and then, reassemble the circuit block, circuit block cover and
two circuit block cover screws.
(As a result, only the rechargeable battery is removed from the movement.)
3. Apply the probes of the tester as shown in the illustration on the next page.
How to measure the current consumption for the whole movement
Note: When applying the minus probe of the tester, take care not to short-circuit the minus probe
and circuit block cover.
4. After checking that a stable measurement is obtained with the tester connected, read the current
consumption.
(As the hands move at 20-second intervals, 3 to 5 minutes may be required before a stable
measurement is obtained.)

8
TECHNICAL GUIDE Cal. V110A
Note: If the measurement value remains high or unstable, shut out the light from the movement, and
make a measurement again.
+
1. Apply the probes of the tester as shown in the illustration.
2. Shut out the light from the circuit block.
How to measure the current consumption for the circuit block alone
Note: If the circuit block is exposed to light, an extremely high measurement value may be obtained.
3. After checking that a stable measurement is obtained with the tester connected, read the current
consumption.
+
●Output voltage for the solar cell unit
Output voltage when the watch is placed at a distance
of 5 cm under a fluorescent light of 15 to 20 watts : More than 2.3 V
1. Connect the tester to the output terminal of the
solar cell unit as shown in the illustration at
right.
Checking procedure
+

9
TECHNICAL GUIDE Cal. V110A
2. With the probes of the tester applied, place the
solar cell unit at a distance of 5 cm under a
fluorescent light of 15 to 20 watts, exposing the
solar cell side to the light, and then measure the
output voltage.
5 cm
●Checking the recharging function
A conventional method of checking the recharging function is to check the difference of the rechargeable
battery voltage between before and after a recharge.
1. Apply the probes of the tester as shown in the
illustration at right to measure the voltage of
therechargeable batterybeforerecharge (initial
voltage).
Checking procedure
+
2. Place the watch at a distance of 5 cm under a
fluorescent light of 15 to 20 watts, and charge it
for 30 minutes.
Notes:
* Use a fluorescent light to charge the watch,
as light sources generating heat may cause
damage to the watch. To charge the watch
efficiently, place it under the center of the
fluorescent tube.
* While charging the watch, make sure that the
watch temperature does not exceed 60°C.
3. After recharging for 30 minutes, apply the
probes of the tester in the same manner as in
step “1” above, and measure the rechargeable
battery voltage while keeping the watch
exposed to the light.
5 cm
5 cm

10
TECHNICAL GUIDE Cal. V110A
4. Refer to the table below to determine whether the recharging function is normal or not.
[ Initial voltage and guidelines of normal/defective decision ]
Initial voltage Guidelines of normal/defective decision
The battery is normal if the rechargeable battery voltage obtained after
recharge is more than 1.2 V.
0.5 V ~ 1.00 V
The battery is normal if the rechargeable battery voltage has increased more
than 0.08 V after recharge.
1.01 V ~ 1.2 V
[ For your information ]
●Guideline of charging time (approx.)
Illumination
(lux) Light source Environment
60-watt
incandescent light
Fluorescent light
30-watt
fluorescent light
30-watt
fluorescent light
30-watt
fluorescent light
30-watt
fluorescent light
Sun
Sun
500
700
1,000
3,000
5,000
10,000
10,000
100,000
Distance
of 60 cm
Office, overhead
Distance
of 70 cm
Distance
of 20 cm
Distance
of 12 cm
Distance
of 3 cm
Cloudy weather
Fair weather
Time required for
full charge
Time required for
steady operation
★1
Time required to
charge 1 day of
power ★2
190 hours
140 hours
100 hours
30 hours
15 hours
8 hours
8 hours
2 hours
20 hours
16 hours
11 hours
3.5 hours
100 minutes
50 minutes
50 minutes
15 minutes
70 minutes
50 minutes
35 minutes
11 minutes
6 minutes
3 minutes
3 minutes
1 minute
Caution for charging:
To prevent damage to the watch caused by heat from a light source, make sure that the watch temperature
does not exceed 60°C while charging the watch.
★1: The time required to charge 1-day of power after all the energy stored in the rechargeable battery is totally
depleted.
★2: The time required to additionally charge 1-day of power while the watch is in use.
* The above table provides only a general guideline, and actual charging time may differ from model to model.

99-9 Printed in Japan