Theory of O peration-60S
V E R TICAL
( Y)
V E RTICAL
D E F LECTION
SI GNALS
+Y I NPUT
AMP L I F I E R
DIAG
+Y PIC KO F F
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-Y P I C KO F F
DYNAMIC
FOCUS
DI AG
+X P I C KO F F
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HORIZONTAL
(X)
D E F L ECTION
·X P I C KO F F
+X I NPUT
AMPL I F I E R
C R T
D I AG
+
H O R I ZONTAL
DI AG
<?
0
SIGNALS
Z·AXIS
AMPL I F I E R
+Z I NPUT
CIAG
0
I NPUT
Cl
Z OUTPUT
LOW-VOLTAGE
POWE R SUPPL Y
CIAG
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DYNAMIC FOCUS
OUTPUT
FOCUS
H I GH·VOLTAGE
COR RECTION
POWE R SUPPLY
CRT
CIAG
OPERATI NG
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VOLTAGE
OPERATI NG VOL TAG ES
TO A L L Cl RCUI TS
2305·3
Figure
4-1.
608 Block Diagram.
input voltages. Front-panel screwdriver adjustment
Y
Gain (R 125) provides a n adjustable amplification factor
to allow crt full-screen deflection range of at least 0.5
to 2.5 volt. This control is normally set to a nomin al 1
volt for
·8
divisions of deflection.
'
VE RTICAL PO S ITI ON IN G & LlM ITER
Vertical positioning is provided by front-panel control
R l 47, through the current sources of 0142-0242. The
4-2
push-pull signals from the
Y
Preamplifier are applied
to the
Y
Output Amplifier after being offset by this
stage. Diodes CR 140 and CR240 prevent overdriving
the
Y
Output Amplifier by limiting the
Y
Preamplifier
signals to within about 4 volts of each other.
Y FOC U S - CO R R E CTI ON P I C K O F F
Samples of the
+Y
and
-
Y
Signals are coupled from
the
Y
Preamplifier to the Dynamic Focus circuit
@
