Belinea 101710 LCD Monitor Service Guide
Chapter 1 Circuit Operation Theory
1.3.2.2 Rectifier and filter
AC Voltage (90-264V) is rectified and filtered by BD601, C605 (See Fig 3) and the
DC Output voltage is 1.4*(AC input). (See Fig.3)
BD601
2KPB06M
3
TR601~
SCK083
41
-+
C605+
100U
400V
105C
~
2
Fig. 3
1.3.2.3 Switching element and Isolation power transformer
When the Q601 turns on, energy is stored in the transformer. During Q601 OFF
period, the stored energy is delivered to the secondary of transformer. R604, C606
and D601 is a snubber circuit. R605 is current sense resistor to control output
power. (See Fig.4)
T601
4PQ2625
R604C606
3
68K1KV53300P
2W(D)
62
D601
RGP10J
7
D602
RGP10D
Q601
K2645
R613
1K
R614R615
20K.22
2W
Fig. 4
5
Confidence and Property |