100
O1X
CPU condition Port D (bit 5) condition LD101 condition Time elapsed (msec)
Power ON Indefinite Indefinite
Power-ON resetting in process "H" level by built-in pull-up resistor ON
Power-ON resetting cancelled
"L" level by initialization OFF 0
(program started)
SDRAM initialized ↓↓3
Program executed on SDRAM ↓↓250
CPU function initialized "H" level ON 250
Task start (interruption cancelled) "H/L" repeated at 500msec intervals Flashing 2000
LD101 condition Trouble diagnosis
ON The reset stare continues or FLASHROM cannot be accessed at all. A hang due to an operation error after initialization
of CPU. As a major possible cause, the reset IC (IC102), buffer (IC112) of the reset signal or CPU (IC101) may have
failed.
OFF Malfunction of FLASH ROM/SDRAM
Flashing The program is not hang but operates properly. It is possible to check the trouble by using the TEST program.
DM
MLN2
LD101
CPU
(IC101)
● Bottom view
The trouble diagnosis is a function that enables to guess the
trouble point when the unit does not appear to work even with
the power turned on. For example, even when nothing appears
on the LCD and even the TEST program cannot be accessed,
the trouble point can be diagnosed by using this function. Once
the TEST program is at work, it is possible to execute the major
device operation check. Therefore, the trouble diagnosis method
used until the TEST program starts to operate is described here.
Trouble diagnosis method
Proper operation of the CPU is checked by outputting the
operation condition of the CPU to LD101 (Port D (Bit5) of CPU)
and monitoring it.
Summarized in the table below are these conditions.
■ TROUBLE DIAGNOSIS
If the illustration of a camera is clicked, an animation will flow.
The sound is not contained in the animation.
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