54
4.4 No Picture - Tuner
+12V_LNB Voltage Checking
Please confirm Power
Sequence
u-com
NG
OK
OK
NG
Repair
Mount check R3037
Check LNB power line
+12.7V_MAIN at R643 = 12V?
Check P_ON_HL signal line
at base of Q604 = 3.3V?
MOSFET Q604/Q605
broken
OK
FOR 12V LNB Voltage Checking: @ AEP and JP
NG
Please refer Power
supply troubleshooting
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
54
SYS SET
2021/02/04 23:38:48 (GMT+09:00)