filtering R906, C909.
•
•
•
•
•
•
•
•
Energy storing and transferring
：
Power transformer T901.
Power driving
：
Power MOS transistor Q901.
Snubber circuit
：
Snubber C907, D902, R902.
Primary side self-powering circuit
：
D903,C914.
Output 13.5 volts for vertical & horizontal drive circuits
：
D904, C915.
Output 27.5volts for horizontal deflection circuit
：
D906 ,C916.
2.2 Video input block
Signal input buffering and switch
‧
CVBS Input buffer
：
Q201 & R201,R202.
Video filter & output stage.
‧
Video input
：
Through C202 to W202 (Contrast VR ) and differential amplifier Q202,
Q203.
‧
Video amplifier: Cascade amplifier R219, Q204, Q205, R222, C206.
‧
Brightness control:VR201, R214, R225, R226, Q204.
2.3 Vertical & horizontal processor
2.3.1 Vertical guard:
This vertical feedback signal on pin2 when the level on pin 2 is below 0.35v or high
than 1.85v the guide circuit inserts a continuous level of 2.5V in the sandcastle output
signal of pin 17.The results in the blanking of the picture displayed, thus preventing a
burnt-in horizontal line.
2.3.2 Vertical drive outpu
t:
9
