8-21
R529
V.DF. output
(1bitDAC)
58
R527
R540
R541
R528
IC510
IC510
C520
3.3V
Aprox. 1Vp-p
Aprox. 3Vp-p
Integration circuit
Inverting amplifier
(3times amplifier)
1V
(Fig. 5.2) The vertical parabolic wave generation and gain control circuit
3) The output amplifier circuit and the coupling circuit
The horizontal and vertical parabola waveforms output from IC501 are clamped before each output circuit
for wide dynamic range of the output circuit. The clamp voltage is determined by the voltages of ZD951 (for
the horizontal parabolic wave) and ZD981 (for the vertical parabolic wave).
After the clamp circuit, the horizontal parabola waveform is amplified approximately 12 times by Q981. The
output signal at Q981 collector is input to T981 via the buffer circuit which is composed of Q982, Q983, Q984
and Q985. The gain of T981 is approximately 9. The vertical parabola waveform is amplified approximately 80
times by Q987. The output signal at Q987 collector modulates the secondary winding of T981 as the vertical
parabola waveform. Therefore, T981 outputs the horizontal parabola waveform which is modulated by the
vertical waveform. This modulated waveform is input to the CRT focus grid via the built-in capacitor of T5R1
(FBT).
D984
C986
R992
R990
C984
ZD981
R993
C985
+220V
R989
R991
To FBT(T5R1)
Q984
T981
C983
R952
Q985
Q983
Q982
R985
R986
R983
R984
C989
D981
D982
Q981
+80V
+15V
+12V
-80V
Q951
R951
R953
D951
C959
ZD951
C958
From IC513
From IC510
(Fig. 5.3) The dynamic focus output circuit
Summary of Contents for MultiSync FP1370
Page 13: ...4 4 REMARK SYMBOL Mount the EMF PWB 121E REMARK SYMBOL Clamp the connector ...
Page 14: ...4 5 REMARK SYMBOL COIL FORMING UPPER SIDE REMARK SYMBOL COIL FORMING LOWER SIDE ...
Page 23: ...4 14 REMARK SYMBOL REMARK SYMBOL Clamp CN CA CN CC and CN D with CLAMPER WIRE ...
Page 26: ...4 17 REMARK SYMBOL Clamp the wires SAFETY REMARK SYMBOL Clamp the wires CN ASD CN AF 21 ...
Page 80: ...5 51 Fig 3 11 CONV PWB Fig 3 12 EMF PWB CN EMF CN LL CN RR CNEM CN CA CN D CN CCB HS8N1 ...
Page 143: ...8 18 15V 80V AFC D FOCUS Fig 3 1 HIGH VOLTAGE CIRCUIT AND PROTECTOR CIRCUIT ...
Page 260: ...10 1 ...
Page 261: ...10 2 ...
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