Chapter 2—Functional Description
Model 330, 340SC and 370SC Service Manual 2-33
Vertical raster centering.
Top and bottom pincushion correction.
Top and bottom keystone adjustment.
Horizontal overall and edge linearity adjustment.
Left and right pincushion and keystone correction
waveform generation.
Sweep reversal for normal and inverted operation.
Generation of wave forms used for dynamic focus.
The block diagram (see Figure 2-13) description, along with the I/O description in the
following section, provide information for module level troubleshooting.
Component numbering on the VDB, in general, follows the pattern that 2XX refers to
components for Green deflection, 3XX refers to Blue, 4XX refers to Red (e.g.: R428 is a
resistor in the red deflection amplifier). Likewise, the correction amplifiers are numbered
5XX for Green, 6XX for Blue, and 7XX for Red.
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