(No.RA073<Rev.001>)1-63
Checking the output signal
from the MPU/DSP
Fail
Fail
Fail
Pass
Checking the control signal output from
the MPU/DSP
Points to be checked
Normal voltage
/FRST
D701(Anode side)
Points to be checked
Normal voltage
SBC MPU/DSP side R51
3.3V
Remove R51 to check the voltage of the SBC.
if the MPU/DSP side is 0V,
the MPU/DSP or Flash Memory or mobile DDR
may be broken.
(1) /RST
:MPU/DSP reset signal
LOW
Reset
(2) /BINT
:Battery final voltage monitoring
LOW
Final voltage
(3) /OVRB_OUT
:Battery overvoltage monitoring
LOW
Overvoltage
(4) /PSW_OUT
:Power switch signal
LOW
ON
(5) /IGN_OUT
:Ignition switch signal
LOW
ON
(6) /FRST
:Flash Memory reset signal
LOW
Reset
(7) /CS_F
:Flash Memory chip select signal
LOW
Active
(8) SBC
:B control
HIGH
ON
(9) PRST
:LCD reset signal
LOW
Reset
1.8V
If the /FRST is always 0V, the MPU/DSP
is broken.
Remove D701 to check the voltage of
Flash memory side R732.
If the voltage becomes abnormal, Flash
memory is broken.
Pass
Pass
Points to be checked
Normal voltage
After power-on,
and
/CS_F IC704(4pin)
1.8V fixed later
If the IC704 (1pin) is 0V or 1.8V,
the MPU/DSP may be broken.
If the IC704 (2pin) is 0V or 1.8V,
the MPU/DSP or Flash memory may be
broken.
1.8V 0V 1.8V,
Descriptions of signal names
Содержание NX-5700HB
Страница 74: ...MEMO ...
Страница 105: ...MEMO ...
Страница 106: ... No RA073 Rev 001 JKS Printed in Japan JVC KENWOOD Corporation Communications Systems Division ...