Sanyo PLC-WU3800 - Appendix; Troubleshooting Guide

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IC Block Diagrams
● FA7701<DDC Control, IC7841>
FA7701
+
–
+
P W M
–
+
E R . A M P
ON/OFF
V R E F
O S C
BIAS
U V L O
5.5V
–
+
–
+
ON/OFF
S.C.DET
0.3V
1.5V
1.5V
–
+
S.C.P
2.2V
OFF
RT
REF
4
FB
IN–
1
2
3
8
7
6
5
CS
VCC
OUT
GND
0.88V
Power Good Signal
VREF
2.2V
● FA7703 <Fan Power Control, IC7811>
Component2