Philips 32HFL5850D/10 - Page 28

Service Modes, Error Codes, and Fault Finding
EN 28 Q522.2HE LA5.
2010-Jun-30
Figure 5-10 “DC-DC output control” flowchart
Figure 5-11 “Supply fault detection” flowchart
supply detection algorithms for DC-DC outputs
DETECT 1 = Low ?
Check DETECT1 5 times
( within 500us )
DETECT 1 = Low ?
5 consecutive times ?
Shutdown ( Active to
Semistdby to standby )
Wait for 5 seconds
Polling every 40ms
Yes
Yes
No
No
Restart
I_18010_074.eps
110608
Error 9
Yes
DETECT1 = High ?
Shutdown ( Active to
Semistdby to standby )
Wait for 5 seconds
Restart
SP
No
N0
supply fault detection algorithm
Yes
SUPPLY-FAULT = LOW for
1ms ?
I_18010_075.eps
110608