Seiko 6R21 Instructions - Page 21

Pin

Adjustment hole

３）Pull the pin out of a adjustment hole

of the band.

Slide the band to adjust

its length and find an appropriate

hole.

Place the pin into the hole.

４）Fasten the buckle with pressing the

push buttons.

78

Push button

Pins

Adjustment hole

１）Press the button on the buckle, and

lift to open the clasp.

２）To adjust : Pull the pins out of the

adjustment holes on the band. Slide

the band to the appropriate length.

Push the pins into the new holes on

the band.

C

Type

79

Lumibrite

[IF YOUR WATCH HAS LUMIBRITE]

LumiBrite is a luminous paint that is completely harmless to human beings and natural en-

vironment, containing no noxious materials such as radioactive substance.

LumiBrite is a newly-developed luminous paint that absorbs the light energy of the sunlight

and lighting apparatus in a short time and stores it to emit light in the dark.

For example, if exposed to a light of more than 500 lux for approximately 10 minutes,

LumiBrite can emit light for 5 to 8 hours. Please note, however, that, as LumiBrite emits

the light it stores, the luminance level of the light decreases gradually over time. The dura-

tion of the emitted light may also differ slightly depending on such factors as the bright-

ness of the place where the watch is exposed to light and the distance from the light

source to the watch.

<Reference data on the luminance>

(A) Sunlight

[Fine weather]: 100,000 lux　　[Cloudy weather]: 10,000 lux

(B) Indoor (Window-side during daytime)

[Fine weather]: more than 3,000 lux　　[Cloudy weather]: 1,000 to 3,000 lux

[Rainy weather]: less than 1,000 lux

(C) Lighting apparatus (40-watt daylight fluorescent light)

[Distance to the watch: 1m]: 1,000 lux

[

Distance to the watch: 3m]: 500 lux (average room luminance)　[Distance to the watch: 4m]: 250 lux

80

81

Troubleshooting

Turn the crown or swing the watch to wind it up.

The watch will start operating. If the watch does not start,

consult the retailer from whom the watch was purchased.

The power supplied by the

mainspring has been consumed.

The watch stops

operating.

Advance the hands by 12 hours.

AM/PM is not properly set.

The day and date change

at 12 o'clock noon.

Consult the retailer from whom the watch was

purchased.

Water got inside the watch due to

the deterioration of the gasket, etc.

The glass is blurred and the

blur persists for a long time.

Normal accuracy will resume when the watch is kept

away from close contact with the magnetic source.

If this condition persists, consult the retailer from whom

the watch was purchased.

The watch was brought into close

contact with a magnetic object.

Normal accuracy will not resume. Consult the

retailer from whom the watch was purchased.

You dropped the watch, hit it against a hard

surface or wore it while playing active sports.

The watch was exposed to strong vibrations.

Consult the retailer from whom the watch was

purchased.

The watch has not been overhauled

for more than 3 years.

Normal accuracy will resume when the watch

returns to normal temperature.

The watch has been left in extremely

high or low temperatures for a long time.

The

watch

gains/

loses temporarily.

Even though you wear the

watch every day,

the power reserve indicator

does not move up.

Problem

Possible cause

Solution

※For the solution of troubles other than listed above, contact the retailer from whom the watch was purchased.

The watch is worn on your wrist only for

a short period of time, or the amount of

arm movement is small.

Wear the watch for an extended period of time, or when

taking off the watch, turn the crown to wind the mainspring

if the remaining power shown by the powerreserve indicator

is not sufficient for the next use.

Seiko 6R21 Instructions - Page 21

Lumibrite, Troubleshooting

Page 21 highlights