Caple C702G Manual de Serviço descarregar pdf (Página 182)

8-57

3) Output Circuit

The output circuit make two convergence correction currents flowing 4H and 4V coils which are constructed on

the deflection yoke. These output circuits are similar to the other. The following description is 4V output circuit.

The digital signals which are output from IC8U1 are converted to the analog signal(4V) at MR8U2 and input

to IC8P2 through IC8W2.The signal(YSC) which is output from DSP(IC501) is changed DC level and swing

at R8N2,R8N3 and R8N4 and then input to IC8P2.These signal(4V and YSC) are mixed at IC8P2 and input

to IC8P1.R8R7 and D8R3 are slice circuit for preventing over current and keep the input voltage at IC8P1

within -0.7V to +0.7V. At IC8N1 the input voltage is converted to the current flowing correction coil on CRT.

MR8U2

IC8P1

IC8P2

IC8W2

C8P2

R8PP

4V Correction

Coil (on CRT)

R8PR

R8PN

R8PM

D8R3

R8R7

R8PH

R8PG

R8N3

R8N4R8NT

R8N2

IC8U1

(V)

-15V

+15V

YSC

(H)(v)

C8PC

(Fig. 9.2) Convergence Output Circuit (Ex. 4V)

SERVICE MENU USER MENU WAVE FORM PICTURE IMAGE

1 H.S.CONVER HORIZONTAL

BGR

2 V.S.CONVER VERICAL

3 H.CONVER SAW T TOP HORIZONTAL

1 2 ... 177 178 179 180 181 182 183 184 185 186 187 ... 285 286

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Caple C702G Manual de Serviço Página 182