Panasonic SA-PT170PH Service Manual page 38

7.1.3. Part Location
7.1.3.1. SMPS P.C.B.
+30V Detect:
D5807, QR5840,
D5843
Feedback circuit:
IC5801, PC5720,
D5725
Temperature Detect:
D5802, Q5841,
R5842
Fig.1 SMPS P.C.B.
38
+18V FAN:
D5805
SMPS P.C.B.