![background image](http://html1.mh-extra.com/html/benq/g2420hd/g2420hd_product-service-manual_2734203061.webp)
-
61
-
#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)
+
C605
<Spec>
150U 450V
1
2
E1
+
-
~
~
BD601
GSIB4A60-LF
3
1
2
4
L6
Fig. 3
#3 Switching element and Isolation power transformer
When the Q601 turns on, energy is stored in the transformer. During Q601 turn-off period, the
stored energy is delivered to the secondary of transformer. C614, R607, C607 and D601 are
snubber circuits. R615 is current sense resistor to control output power. (See Fig.4)
L603
Z45/100MHZ
R615
0.22
D601
UF4007-LF
A
K
2
T601
1
3
12
5
8
11
6
4
10
E2
E5
E4
E3
Q601
D
G
S
L605
Z45/100MHZ
L604
Z45/100MHZ
C614
100P K
C607
0.001U J
R607
68K
Fig. 4
Summary of Contents for G2420HD
Page 10: ...10 3 1 2 6 Support Timings...
Page 51: ...51 5 4 Packing...
Page 56: ...56 5 6 4 2 AC DC converter...