Sony XR-55A95K Service Manual page 23

TROUBLESHOOTING
1.3 No Power – DDCON / LDO
Board Operation IC Ref
DC/DC IC418 or IC419
LDO IC403
DC/DC IC600 or IC610
DC/DC IC601
DC/DC IC603
DC/DC IC611
DC/DC IC801
DC/DC IC802
DC/DC IC803
DC/DC IC804
BM5S22 LDO IC806
DC/DC IC807
DC/DC IC808
LDO IC809
DC/DC IC810
DC/DC IC811
DC/DC IC4800
DC/DC IC4801
DC/DC IC4802
DC/DC IC4803
DC/DC IC4809
DC/DC IC4810
Voltage supply Output ref.
C508 or C514
5.0V_STBY_H
/JL1212
3.3V_MAIN_H C416/CL402
5V_MAIN/5V_AUDIO C610 or C673/JL601
3.3V_MAIN/3.3V_AUDIO C619/JL603
1.0V_TU_P C630/CL607
5.0V_VBUS_CAMERA C682/JL635
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
1.8V_BE_DDC C4805/JL4801
1.1V_BE C4813/JL4803
0.9V_BE_DDC_1 C4820/JL4805
0.9V_BE_DDC_2 C4828/JL4807
0.8V_BE C4860/JL4819
0.7V_BE C4878/JL4821
Enable pin Enable source
R557 R557(3.3V_STBY)
R413(shorted) P_ON_#2
R600 or R670/
P_ON_#2
CL604 or CL615
R658/CL605
R658(1.8V_BE_DDC)
P_ON_#2 or IC1000 #AL18
R631(shorted)/JL607
(EWS_PWR_ON)
R681/CL616 P_ON_#2
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
R4801(shorted)/CL4816 P_ON_#2
R4907/CL4817 R4907(1.8V_BE_DDC)
R4819(shorted)/CL4818 P_ON_#1
R4827(shorted)/CL4819 P_ON_#1
R4849(shorted)/CL4808 P_ON_#1
R4865(shorted)/CL4811 P_ON_#1
P_ON_#1 : P-on u-com IC401 #pin12
P_ON_#2 : P-on u-com IC401 #pin13
Fuse Vcc ref.
- C505 or C511
- C415
F600 or
C601 or C666
F602
F601 C618
- C628
F603 C681
- C801/CL819
- C807/CL822
- C810/CL824
F802 C831
- C817/CL826
F800 C822
F801 C828
- C815
F803 C855
F804 C868
F4800 C4803
F4801 C4812
F4802 C4819
F4803 C4827
F4804 C4845
F4805 C4863
23
SYS SET