Power Board Diagram; Emi Filter - BenQ G2420HD Product Service Manual

(5) "Auto" key: to perform auto adjustment
(6) LED: It indicates the DPMS status of this LCD monitor; blue light means DPMS on (Normal
operating condition). Amber light means DPMS off (Power Saving).
A-3.) Power board diagram:

EMI Filter

PWM
controller
#1 EMI Filter
This circuit (fig. 2) is designed to inhibit electrical and magnetic interference for meeting FCC,
VDE, VCCI standard requirements.
Rectifier
and filter
Switching element
TR601
NTC 5
L4
2 1
1
2
C602
0.22U M
- 60 -
Isolation
power
transformer
Feedback
Isolation
Fig.1
L602
4 C601
0.22U M
3
19MH
N3
Fig. 2
Rectifier and
filter
Rectifier and
filter
C604
2200PF
C603
2200PF
Inverter
circuit
SW regulator