Sony KD-43X7 H Series Service Manual page 65

2020/12/12 02:35:59 (GMT+09:00)
12V DDCON check
START
Check fuse F1000 /F1003
Is < 1ohm
yes
Check Input to GND
Is > 1k ohm?
yes
Check Input to Output
Is > 1k ohm?
yes
Check Output to GND
Is > 1k ohm?
yes
Check 12V
C1016 voltage
Is voltage <12V?
yes
Check EN POWER_ON
R1003 voltage
Is voltage >2.5V?
yes
Check Vcc
C1009 voltage
Is voltage >5.0V?
yes
SAFETY NOTES SELF DIAGNOSTIC FUNCTION
T R O U B L E S H O O T I N G
no
Fuse F1000 /F1003 broken
no
DDC IC1000 broken
no
DDC IC1000 broken
no
DDC IC1000 broken
≥ 12V
no
Check B-Board
Troubleshooting flow 1.2
no
IC1000 broken
TROUBLESHOOTING
S E C T I O N 3
12V_TCON check
yes
Check point on PWB refer slide 66
SERVICE ADJUSTMENT
Check 12.5V_TCON
Is voltage > 12.0V?
no
no
Check TCON_ON
C1024
Is voltage > 3.0V?
yes
no
Check MOSFET
Q1006
Is > 1kohm?
yes
12V power OK
Check other troubleshooting flow
END
DIAGRAMS PANEL HANDLING
Main device failure
Q1006 broken
65
FACTORY DATA RESET
SYS SET