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9-7
BDP-BX2/S360
IFcon section flowchart (2/2)
Check of IFcon reset in
p
ut
p
or
t
Is the voltage of IC1403 pin 6 "H" (3.3 V)?
Is there a problem with the mounting
condition of R1414, C1410, or R1408?
Yes
Yes
Pcont out
p
ut
p
ort check
Check of each power supply control port
when the power is ON
IC1403 pin 20 Pcont3
IC1403 pin 21 Pcont2
IC1403 pin 28 Pcont1
IC1403 pin 31 Pcont4
IC1403 pin 32 ATAPCONT2
IC1403 pin 33 ATAPCONT2
DCSW3.3V output
1.8 V system output
DR_SW12V output
POWER (3.3 V and 1.5 V) output
No
Check for shorts at each port
No
All the ports go "H" within 2 to 10 ms, but
soon go "L".
No
Yes
Yes
Yes
Do the symptoms improve after checking the
soldering and pattern of IC1403?
No
Power su
pp
ly
out
p
ut check
SW3.3V Short circuit o
p
eration chec
k
Check the output of the corresponding
voltage.
No
When IC1403 pin 20 Pcont3 has gone "H", is
the SW3.3V voltage output?
Yes
No
To Power Supply (System) flowchart
Do the symptoms improve after checking the
mounting condition of R1439, R1442, and
IC1403 pin 52?
No
Replace IC1403 or replace the MB board.
To Drive flowchart
BU Adjustment Flow [yy] ~ After BU/MB
Replacement ~
Yes
Check SYS
_RST si
g
nal out
p
ut
Is IC1403 pin 35 "H" (3.3 V)?
The mounting condition of R919 and R523
are OK.
No
Replace IC1403 and the MB board.
To Drive flowchart
BU Adjustment Flow [yy] ~ After BU/MB
Replacement ~
No
Yes
Check the communication with the host CPU
(SYSCON
_REQ si
g
nal check
)
Do cyclical "H" and "L" communication
waveforms come to IC1403 pin 36?
No
Is there a problem with the mounting
condition of R1450, or 1462?
No
Do the symptoms improve after replacing
IC101?
No
Yes
Check the communication with the host CPU
(Serial communication si
g
nal check
)
Do cyclical "H" and "L" communication
waveforms come to IC1403 pins 25, 26, and
27?
No
Is there a problem with the mounting
condition of RB1403, R1430, R937, R936,
R939, or R938?
No
Replace IC1403 or replace the MB board.
To Drive flowchart
BU Adjustment Flow [yy] ~ After BU/MB
Replacement ~
Is the voltage at the "H" level (3.3 V)?
SW3.3V output
1.05 V system output
DCSW3.3V output
1.8 V system output
DR_SW12V output
POWER (3.3 V and 1.5 V) output
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