| Electronics > Repair |
| Solartron 7061 7.5 Digits Multimeter Teardown and Repair |
| << < (3/9) > >> |
| Kosmic:
So replacing the WM222 by a VN2210 fixed the -Glug. Nevertheless I decided check the rest of the integrator before calling it a day. For some reason (VN2210 being not exactly the same as WM222 ?) the -Glug Drive squarewave was curving a bit. Trace 1 = +Glug Drive Trace 2 = -Glug Drive Increasing the capacity of C808 fixed the issue. I played with different value and ended up using a 1uF tantalum capacitor. Trace 1 = +Glug Drive Trace 2 = -Glug Drive The new transistor and cap installed on the board. |
| Kosmic:
Unit #1 is now passing Self-Test and seem to be fixed :-+ |
| Kosmic:
Next steps: - Teardown - Testing all electrolytic capacitors - Replacing the Schaffner filter - Replacing the memory backup battery - Replacing the input connectors |
| coromonadalix:
Congrats for your repair :-+ |
| Kosmic:
Teardown: All the 7061 PCBs PCB 13 - Digital Board |
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