NEC MultiSync FP1355 FP1355 FP1355, Service Manual

Page: 30 / 207

1 - 24
The waveform of the deflection current is compensated from Fig. (a) to Fig. (b) through the
above. The starting section of the current is smoothened, and the linear section becomes the
S type.
1.3 Vertical output block
The vertical deflection circuit controls the vertical width and vertical position with IC601 on the
DEFL_SUB substract, and IC603 controls the linearity. Moreover, the signal output from IC603
is input to the vertical deflection output IC401.
Figure(a)
Figure(b)
Figure 12 IC401(LA7841L) Pin connection & Function Block diagram
-15V
Ver. OUTPUT
OUTPUT STAGE VCC
INVERTING INPUT
PUMP UP OUT
NON INV. INPUT
+15V
1
2 3 4 5 6 7
AMP
|
{
PUMP
UP
THERMAL
PROTECTION