Tektronix WFM601, Руководство по обслуживанию

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WFM 601 - Service Manual
3–1
Block Diagram Description
The WFM601 is a serial digital component monitor. Its inputs are serial only,
and it offers no signal filters except a differentiated step filter. It provides
waveform, parade, component vector, bowtie, lightning, and diamond displays.
In addition there is a transcoded output providing GBR or Y, P
B
,P
R
outputs to
drive component picture monitors.
With the exception of the power supplies, the block diagrams discussed here can
be found in the Diagrams and Circuit Board Illustrations, at the rear of this
volume. There are three large block diagrams.
Signal flow, microprocessor-generated levels, and feedback lines are shown as
solid lines. Control lines are shown as dashed lines. Signal flow is from left to
right on these diagrams.
Block Diagrams
The low voltage power supply is of the switching high efficiency type. It is the
universal supply that will operate over a mains range of 90 to 250 Vac. The high
voltage power supply provides an acceleration potential of approximately 13.75
kV. See Figure 3–1.
LOW VOLTAGE
POWER SUPPLY
HIGH VOLTAGE
POWER SUPPLY
4X MULTIPLIER
40 Vdc
40 Vdc
100 Vdc
11 Vdc
5 Vdc
-11 Vdc
TO ALL
CIRCUITS
+11 kV
-2.75 kV
CRT
Figure 3–1: Power supply block diagram.
Power Supplies