Sony BDP-BX2 - Page 96

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)?
No
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
 Corresponding output
IC1403 pin 20 Pcont3 IC1403 pin 21 Pcont2 IC1403 pin 28 Pcont1 IC1403 pin 31 Pcont4 IC1403 pin 32 ATAPCONT2 IC1403 pin 33 ATAPCONT2
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
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
l
y
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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