9-1
SECTION IX HORIZONTAL DEFLECTION CIRCUIT
This model employs special circuit configulation, since the hor deflection circuit should keep operation with any frequency
ranging from 15kHz to 40kHz unlike ordinary TV set. That is; the circuit which fills the role of supplying current into deflection
yoke, and the circuit which generates the high voltage, are separated.
From now on, the former is called as DEFLECTION CIRCUIT, and the latter is called as HIGH VOLTAGE CIRCUIT.
Therefore, two hor output transistors exist, and also two sets of hor drive circuit exist.
But on both circuits, operation theory of the most basic part is the same as that of ordinary TV. The circuit description is as
follows.
1. DEFLECTION CIRCUIT
1-1 Outline
Fig. 1 is block diagram.
Fig. 1
TH02 is a transformer corresponding to FBT of ordinary TV
set, and from which AFC pulse and BLK pulse are taken out.
The power source produced from pins 4 to 6 of the transformer,
let the hor centering circuit which moves raster left and right
operate.
In ordinary TV, size and side-pincushion distortion are
adjusted by using diode modulator, but in this model, those
are adjusted by using chopper.
Unlike TV, the resonating capacitor and the S-character
capacitor are changed by operation frequency.
The changing elements are QH29 and QH39. Then, basic
operation theory common with TV, will be explained in the
next section.
H.Drive
Trans.
TK01
QH30
HOR.
OUTPUT
CH60
CH57
TH02
CH58
QH29
L462
LH04
CH66
CH65
QH36
QH25
CHOPPER
REGULATOR
11
8
3
1
6
5
4
AFC pulse
BLK pulse
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