Sony KD-43X85K Manual page 21

2022/04/19 01:21:05 (GMT+09:00)
TROUBLESHOOTING
1.2 No Power u-com Failure
Power-Board
or
LD-Board
12.7V_MAIN
19.5V_12.7V_AUDIO
3.3V_STBY
SAFETY NOTES
Main Board
VDD
3.3V_STBY
#pin6
BL_ON
#pin7
POWER_ON
#pin10
R450
12V_MON
#pin16
R444
ADC port
GND
TYPE_DET
#pin17
DC_MON
#pin11
ADC port
GND
GND
SELF DIAGNOSIS FUNCTION
PGOOD_1
#pin9
P_ON_#1
#pin12
P_ON_#2
#pin13
P_ON_HL
#pin18
OPWRSB
#pin2
ORESETB
#pin14
DC_OFF_DET
#pin3
X_BL_MUTE
#pin8
TROUBLESHOOTING SERVICE ADJUSTMENT
P-on u-com control signal path summary
DDC : 0.8V_M5_CORE (IC804)
LDO : 1.8V_EMMC (IC2201)
DDCs:
5V_MAIN&5.0V_VBUS&5V_AUDIO (IC600),
1.0V_TU_P(IC603), 1.8V_M5 (IC813), 1.0V_M5 (IC812),
0.8V_M5_CPU (IC810), 0.8V_M5_GPU (IC811)
LDOs:
3.3V_MAIN_H (IC403)
FET SW :
3.3V_TU_P (Q602), 3.3V_MAIN &3.3V_AUDIO(Q611),
FET SW : 12.7V_LNB (Q604)
SW IC : 3.3V_TU_P (Q609)
USB VBUS SW (IC3803/IC3804)
SOC Muffin 5 (IC1000)
DIAGRAM
21
HANDLING GUIDE
SYS SET