Sony XBR-55X900H Service Manual page 22

2021/04/27 23:25:57 (GMT+09:00)
1.3 No Power DDCON/LDO
BM5 and BM5S Board Model
Board Operation IC Ref
BM5/BM5S LDO IC400
BM5/BM5S LDO IC403
BM5/BM5S DC/DC IC600
BM5/BM5S DC/DC IC601
BM5/BM5S DC/DC IC603
BM5/BM5S DC/DC IC801
BM5/BM5S DC/DC IC802
BM5/BM5S DC/DC IC803
BM5/BM5S DC/DC IC804
BM5/BM5S LDO IC806
BM5/BM5S DC/DC IC807
BM5/BM5S DC/DC IC808
BM5/BM5S LDO IC809
BM5/BM5S DC/DC IC810
BM5/BM5S DC/DC IC811
SAFETY NOTES
Checking item summary
Voltage supply Output ref.
5.0V_MAIN_H C414/CL400
3.3V_MAIN_H C416/CL402
5V_MAIN/5V_AUDIO C610/JL601
3.3V_MAIN/3.3V_AUDIO C619/JL603
1.0V_TU_P C630/CL607
1.1V_M5_DDR C806/JL801
0.9V_M5_STBY C809/CL803
1.8V_STBY C812/CL811
0.8V_M5_CORE C846/JL803
1.8V_M5_ET_STBY C818/JL808
1.8V_M5 C823/JL811
1.0V_M5 C829/JL813
3.3V_M5_STBY C816/CL831
0.8V_M5_CPU C861/JL816
0.8V_M5_GPU C874/JL818
SELF DIAGNOSTIC FUNCTION TROUBLESHOOTING
T R O U B L E S H O O T I N G
Enable pin Enable source
R408(shorted) P_ON_#2
R413(shorted) P_ON_#2
R600(shorted)/CL604 P_ON_#2
R610(shorted)/CL605 P_ON_#2
P_ON_#2 or IC1000 #AL18
R631(shorted)/JL607
(EWS_PWR_ON)
R913(shorted) R804/R907 (3.3V_STBY)
R908(shorted) R804/R907 (3.3V_STBY)
R822(shorted) R804 (3.3V_STBY)
R849(shorted)/CL816 P_ON_#1
IC1000 #AN19
R832(shorted)
(ETHER_PWR_EN)
R833(shorted)/CL827 P_ON_#2
R839(shorted)/CL828 P_ON_#2
R917 R917(3.3V_STBY)
R914/CL829 P_ON_#2
R915/CL830 P_ON_#2
SERVICE ADJUSTMENT
Fuse Vcc ref.
F400 C413
- C415
F600 C601
F601 C618
- C628
- C801/CL819
- C807/CL822
- C810/CL824
F802 C831
- C817/CL826
F800 C822
F801 C828
- C815
F803 C855
F804 C868
P_ON_#1 : P-on u-com IC401 #pin12
P_ON_#2 : P-on u-com IC401 #pin13
DIAGRAM HANDLING GUIDE
22
SYS SET