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TDS3000 Series Service Manual
3–1
Theory of Operation
This chapter describes the electrical operation of the oscilloscope to the module
level. Figure 3–1 shows the oscilloscope module interconnections.
Power
supply
Battery
board
Main board
J950 J500
J860
comm. module
J810
J700
Front
panel
Input ports for
application
modules
J900
Attenuator circuit
Display
backlight
Display
Ch 1
Ch 1
Ch 2
Ch 2 Ch 3
EXT
Ch 4
2-channel oscilloscopes
Parallel printer
connector
Battery
pack
J800
Floppy
Disk Drive
Fan
AC Line
4-channel oscilloscopes
J150
J100 J100
J170
J200
15 VDC external
device power
connector
Figure 3–1: TDS3000 series block diagram
Power Supply
The power supply converts AC line voltage to 15 VDC to power all internal
circuits and an external power connector. It also supplies power to charge the
optional battery pack.