Power Board - Philips 221TE4LB/57 Service Manual

Meridian 4
17

5.2 Power Board

221TE4L
16V
AC Input
Bridge Rectifier Rectifier
EMI Filter
Transformer 5.2V
and Filter
Diodes
Start Resistor
(R906, R909, R911)
Feedback
PWM Control
Circuit
LD7576AGR Power Switch
(Q901)
(IC901)
Photocoupler
(IC902)
16V
Boost Circuit
Feedback Circuit
Setup-up Controller
LED Bar
ACTL
RT8482GS
(IC904)
OVP Circuit
ON/OFF