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SDS5000XSeries Digital Oscilloscope Service Manual
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TP43
Reference Clock
Locked
LVCMOS33
High level indicates PLL locked
Low level means PLL lock failed
8.5.2
Acquisition Board SDY8.007.140
8.5.2.1
Acquisition Board Drawings
It is recommended that to remove the acquisition board from the
metal frame and re-assemble the power supply module to the metal
frame for easy access to the test points and safety considerations.
Follow the instructions in chapter Disassembly Procedures.
Reconnect the power cable to the acquisition board after you have
confirmed that the power supply module is in good condition.
Power up the acquisition board by pushing the front panel power
button.
In most cases, you can hear the relays click if the acquisition
boardpower up successfully. If you cannot hear the click or there is