
Pin 1 of the IC also monitors the status of the transformer. The network
consisting of D564, D556, R573, and C553 rectifies and filters the AC voltage at
pin 2 of the secondary of the transformer T501. The output voltage enters pin 1
of the IC for transformer sensing. Voltage regulation is achieved via the
feedback network consisting of D566, D554, and R558.
VDA and other Voltage Sources
Figure 20c
The +12V source
The 20V source is primarily used in the A-Board. It is applied to a regulator IC,
IC2304 to obtain a 9V output. The diode D568 converts the AC voltage supplied
by the secondary windings of the transformer T502 to 12Vdc.
35
Содержание TH42PX20U - 42" HDTV PLASMA DISPLAY
Страница 2: ...2 ...
Страница 6: ...6 ...
Страница 25: ...SC Board Explanation Figure 12 25 ...
Страница 29: ...Figure 16 29 ...
Страница 56: ...Test Point locations Figure 38 56 ...
Страница 60: ...I2 C Menu Structure The values indicated in this flowchart are sampled data Figure 41 60 ...