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8-3-1. Power On
Watch can`t power on.
Check the Internal Battery
Voltage.
Is it more than 3.4V?
Check the key-FPCB
(open, etc)
Power-on the Watch and check
the power-on sound
Sound or vibration is ok?
Check the U400 output voltage
(C438 = 1.15V, C440 = 1.05V,
C442 = 1.35V, C443 = 2.1V,
C420 = 1.2V, C421 = 1.15V)
Check the Clock
OSC400(C401)
Is that frequency 19.2MHz?
Check the U400 output clock
C437
Is that frequency 32KHz
check the initial operation
END
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Yes
Yes
No
Yes
Yes
Yes
Yes
Charging the battery by TA.
No
If its voltage level is extremely low(under 3.0V),
Change the battery.
Abnormal
Change the key - FPCB
And retry to the power-on operation.
Yes
Change the OCTA LCD ASSY
If the output voltage is not satisfied with normal
No
condition, Change the U400.
No
If the output frequency is not satisfied with normal
condition, Change the OSC400.
If the output frequency is not satisfied with normal
No
condition, Change the U400.
8-5
Level 3 Repair
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