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E. Horizontal Processor
H sync go through TDA4855 internal separation circuit to the first comparator for HOR. Phase ADJ
and then to stage output. A HOR. Drive pulse from pin 7 and input H-sync limit is setting by R431,
R432 and C415.
E-1. Geometric distortion correction
The E-W parabola output from pin 11 is controlled DC CONTROL (pin 20 & 21) and this
parabola go through Q404-Q407 input to pin30 (HOR. Phase ADJ.) for pin-balance ADJ. and
also go through Q408-Q411 for parallel ADJ. And through Q412-Q414 for corner ADJ.
F. Vertical Pre-Amp
VERT. Sync input to VERT. OSC. and generates a saw-tooth at pin 24, the free-run frequency is
setting by R428 and C412 & (fvo=1/10.8 x R428 x C412 & C445), the V-position is controlled by the
D-C (pin 17), and V-size is controlled by D-C (pin 18), and the pin 19 is to ADJ. VERT. linearity.
F-1. VERT output circuit U601 (TDA 8351) see Figure (6)
The saw-tooth is output from U401 pin # 12 & 13. to the pins # 1 and 2 of TDA8351 (vert output
amplifier) and then output from pin # 7 to the vert DY for vert. deflection.
F-2. Horizontal size modulation
To modulation H-size control DC is achieved by applying a parabola to the pins 3 and 5 to
control U402 mono-stable to generate a square wave to drive Q505 thus obtaining a variable
B+ which is input frequency dependent.
31.5KHz
HOR.B+=200V x
HOR.B+=200V x
T=31.75mS
6.8 to 8.6 mS
31.75 mS
95KHZ
T=10.526 mS
6.8 to 8.6 mS
10.526 mS
= 43.2 to 54.7V
= 130 to165V
-- 16 -
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