1-154 (No.RA054<Rev.001>)
Checking the operation of the MSP430
When VIN of 54M
is 0V.
Pass
Pass
Check that the signal BAT_CNT
of MSP430(IC22 - 7pin) outputs High(3.1V).
54M(IC25) or its peripheral circuit is broken.
Fail
Fail
Pass
When the signal /OVRB_OUT has an abnormal outputs,
check that the /OVRB(IC22 - 2pin) is High(3.1V) in the
deck powered on.
MSP430 or its peripheral circuit is broken.
MSP430 is broken.
Checking the operation of MSP430 (/OVRB_OUT)
Pass
Fail
When the signal /RST(IC22 - 14pin) has an
abnormal output, check that the analog voltage of
/RST(IC22 - 6pin) is normal.(typically 2.7V.
Minimum detection voltage is 2.0V.).
MSP430 is broken.
MSP430, 54M(IC25) or its peripheral circuit of is
broken.
Pass
Fail
Check that the analog voltage
of /BINT(IC22 - 5pin) is normal(typically 2.6V.
Operating voltage range is 1.6V~3.0V).
MSP430 is broken.
Pass
Pass
Checking the operation of the MSP430 (/RST)
Checking the operation of MSP430 (/BINT)
Check that the voltage of VIN of 54M(IC25 - 8pin)
is 13.6V.
Standard Voltage/Operating Voltage range
K Type 13.6V/13.6 15%
E type 13.2V/10.8V~15.6V.
Set the supply voltage within the operating voltage
range. If set correctly, MSP430 or its peripheral
circuit is broken.
Set the supply voltage within the operating voltage
range. if set correctly, 54M(IC25) or its peripheral
circuit is broken.
When the signal /BINT(IC22 - 13pin) has an abnormal
outputs, check that the signal /RST(IC22 - 14pin) has
correct output.
MSP430 or its peripheral circuit of is broken.
Check the voltage (13.6V[operating voltage range])
at both ends of F1(fuse). If F1 is broken, replace the
F1 with a new one. If F1 is not broken, 54M(IC25) or
its peripheral circuit is broken.
Fail
Check that the voltage of DVCC of MSP430(IC22 - 1pin)
is 3.1V.
MSP430, 31BU, 50BU or one of these peripheral
circuit is broken.
When VIN of 54M is
out of operating
voltage range.
If 12M, 18M or 32M has still an abnormal voltage after the implementation of each procedure above,
54M(IC25),12M(IC24),18M(IC12),32M(IC20) or one of these peripheral circuit is broken.
54M(normally 5.4V at L13) has an abnormal voltage, check the MSP430(IC22) according to the following procedure.
*1
*2
Summary of Contents for NX-3720
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