23
1.2 No Power U-Com Failure
P-on u-com control signal path summary
Check P_ON_HL
CL415
or
P-on u-com #pin18 (IC401)
is >3.0V?
no
yes
yes
Check P_ON_#2
CL417
or
P-on u-com #pin13 (IC401)
is >3.0V?
no
Check ORESETB
CL416
or
P-on u-com #pin14 (IC401)
Is the voltage >3.0V?
no
yes
Change IC401
Change IC401
Change IC401
Previous page
Check X_BL_MUTE
CL412
or
R459
Voltage.
Is the voltage >3.0V?
no
yes
Check “X_BE_RST” (from SOC Muffin).
*If X_BE_RST is >3.0, SOC BE(IC5000) problem.
Otherwise, SOC Muffin 5 (IC1000) problem.
END
u-com IC401 is working OK
Check BL_ON
CL420
or
R471
Voltage.
Is the voltage >3.0V?
Change IC401
no
yes
T R O U B L E S H O O T I N G
SAFETY NOTES
SELF DIAGNOSTIC FUNCTION
TROUBLESHOOTING
SERVICE ADJUSTMENT
DIAGRAM
HANDLING GUIDE
23
SYS SET
2021/02/04 23:38:48 (GMT+09:00)