Products > Test Equipment
Dick smith Q1803 Oscilloscope
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samson:
Would any one have a schematic Diagram of the dse Q1803 please as I have a not working  crt that I would like to fix.
JohnC:
These were sold under a LOT of different names. This thread will help you heaps...

https://www.eevblog.com/forum/testgear/any-experience-with-atten-at7016-1-channel-10mhz-oscilloscope/

Schematics there, and heaps of other useful info.
sean0118:
Hey, I have a colleague who has fixed these, their advice is:

“Check the fuse for the EHT power supply first.  It’s located on the main PCB, close to the middle.  If this fuse blows, no EHT, and no trace.  I fixed a Q1803 ‘scope a few years back by replacing the fuse for the EHT supply.  There were no other faults.  The symptom was no trace.”

 :-+
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