Vertical Deflection; Vertical Drive; Vertical Geometric Corrections - Sony CPD-420GS Training Manual

Vertical Deflection

Vertical Drive

The DSP IC1002 (N Board) pin 1 (VSAWN) outputs the vertical sawtooth
waveform signal. The vertical sawtooth waveform is buffered by IC1007
(1/2) and is routed to the D Board. The vertical sawtooth waveform is
then input to IC401/7 (V IN). IC401 current amplifies the vertical sawtooth
waveform and outputs drive at pin 5 to the Vertical Deflection Yoke via
CN501/6. IC1002/2 (DCC2) provides a DC reference voltage via IC1007
(2/2) buffer and is applied to IC401/1.
CN801/13 VSAWN
IC401/5 V DRIVE
85

Vertical Geometric Corrections

Vertical Geometric Corrections can only be performed via the DAS
Software. Vertical Size and Centering are the only adjustments
that can be accessed by the user via the OSD menu. The Micro
IC1001 via the I 2 C bus communicates with the DSP IC1002. IC1002/
1 (V SAWN) outputs the necessary vertical sawtooth waveform to
IC401 to be applied to the Vertical Deflection Yoke.
· The V SAWN waveform controls the Vertical Size by varying the am-
plitude.
· The V SAWN waveform controls the Vertical Linearity by varying the
shape.
CN801/13 VSAWN