Mitsubishi Electric 1786FD2 Service Manual page 63

MEA 1786FD2 CRT Monitor Service Guide
3.7 DEGAUSS CIRCUIT
B55
This circuit has the function of auto degaussing and manual degaussing. When power supply is
switched ON it is auto degaussing stage. When user make the selection of the manual degaussing
function in OSD, the degaussing current will flow through coil to degauss the screen of monitor.
TR602 is a PTCR to control degaussing coil current
3.8 power saving control
Mode
Normal
Stand-by
Suspend
Off
When the H-sync or V-sync are none, the power supply +6.3v and+13v output will be cut-off.
The power input will be under 5W.
3 2
C621
D708
2200P
250V 1N4148
(Y)
4 1
RL601
Q706
TR602 H945
2R9M
B56
2 1
M602
TR601
2P
8D-13
H-sync V-sync
Normal Normal
None Normal
Normal None
None None
D709
1N4148
C708
+
R705
47U
(OPEN)
16V
(EL)
D603
R706
20D6
4.7K
B60
D604
B59
L604
20D6
180UH
D605
20D6
LED
Green
Orange
Orange
Orange
Circuit Operation Theory
+12V
DEGAUSS
CN602
2P
2 1
Power Rating
100 ¢ M
¡ Ø
5W
¡ Ø
5W
¡ Ø
5W
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