No power
(from the previous section)
YES
Replace Main PCB.
NO
<5>
Is the clock for main
microcomputer (IC3001)
oscillated?
YES
Main microcomputer controls all function of this unit and
it operates both power switch ON and OFF condition.
4 MHz clock will stop for energy save after some
minutes passes in stand-by mode,
but 32kHz clock operates continuously.
4 MHz clock will operate again after turn on the unit.
Replace Main SW PCB.
Is the voltage changed
at SWITCH (Between pin 1 and 2 of
P8003 on OLED PCB) when pressing
Power button?
YES
Not pressing : +2.7V and over
Pressing : 0V
Confirm connection between
Pin 2 of P8003 on OLED PCB
and Pin 30 of P7005
on Main PCB.
Replace Main PCB.
YES
YES
Not 0V when Pressing
Not +2.7V and over
when not pressing
NO
Is FFC damaged?
YES
NO
Replace OLED PCB.
Replace FFC.
Confirm connection between
Pin 2 of P8003 and
Pin 1 of P8001 on OLED PCB.
Main PCB
<5-1>
X7001 : 4MHz Main clock
<5-2>
X7002 : 32.768 kHz Sub clock
Not short
(over 100 kohm)
NO
Replace Main PCB.
Short
(0 ohm)
1) Disconnect FFC between Main PCB and OLED PCB,
between OLED PCB and Main SW PCB.
2) If the connection of the followings, replace PCB.
Main PCB : Pin 24 and 30 of P7505
OLED PCB : Pin 1 and 2 of P8003
Main SW PCB : Pin 6 and 7 of P8401
NO
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