Products > Test Equipment
The Siglent SDG1000 and SDG800 thread
EVS:
I had this once. SDG805. Stripping down and cleaning buttons PCB contacts.
rspt1908:
Thank you EVS :) May I ask if the screw threads on the front panel pc are metal or just plastic (for self tapping screws)? :)
tautech:
--- Quote from: rspt1908 on August 23, 2018, 04:22:38 am ---Thank you EVS :) May I ask if the screw threads on the front panel pc are metal or just plastic (for self tapping screws)? :)
--- End quote ---
Not had an 800 apart but the SDG1000 were self threaders IIRC.
Just be careful when refitting them and LH them until they drop into their old threads.....like any that are self tappers. ;)
EVS:
>rspt1908
Of course, it's a plastic :).
southpacific:
Repair Solution- Siglent SDG1050 - Erratic Output Level
A Siglent SDG1050 (PCB Version SDYB.007.009C) was in use for 7 years, until the main (Ch1) output went erratic.
On Channel 1 (right hand socket), the output voltage at 1.999V was correct. At 2.000V the output dropped to around 400mV.
An initial replacement of all relays did not correct the problem.
So another SDG1050 (PCB Version SDYB.007.009G) was purchased (These are quite good instruments).
The tracking and comparison of signals between units was difficult (no schematic), as the PCB output section on the newer unit had been changed (to rectify fault issues in the earlier units - which caused this failure).
With the faulty unit, as an opamp's output signal was followed, the signal suddenly dissappeared across a resistor. But the signal level was good on the newer unit. The resistor had gone open.
The 1.999V to 2.000V fault resulted from R154 (24R9 0603 marking 39X) going open (There were two in series for ~50R). On the newer instrument, they had been replaced by a higher wattage 2512 49R9 resisor. So Siglent knew about the problem and has fixed it.
If others have faults with their Siglent Signal Generator, in the relay area (near the BNC sockets), check as many resistors as possible. Get a resistor value marking table (on the web) and check that each resistor is close to its expected value.
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version