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@ -6,7 +6,7 @@ This unit has clearly seen better days as the pushrods are gone and it looks pre
On inspection, there are some initial problems that are quite obvious, namely burnt resistors on the main A1 DC measurement board. These have been burned to a crisp, probably due to overvoltage. Looking at the schematics, these are two 5K resistors along the DC input path. Looking at the components, they appear to be CRF65 resistors, very similar to the CRF65. Luckily I had some resistors on hand that could function as a suitable replacement with some artistic creativity. Some measuring around the input section for any other bad devices also made me inclined to believe all was in order. On inspection, there are some initial problems that are quite obvious, namely burnt resistors on the main A1 DC measurement board. These have been burned to a crisp, probably due to overvoltage. Looking at the schematics, these are two 5K resistors along the DC input path. Looking at the components, they appear to be CRF65 resistors, very similar to the CRF65. Luckily I had some resistors on hand that could function as a suitable replacement with some artistic creativity. Some measuring around the input section for any other bad devices also made me inclined to believe all was in order.
Selftest afterwards reveals seemingly no issue with the DCV section, excellent! Selftest afterwards reveals seemingly no issue with the DCV section, excellent!
![fix](3458-WorkLog/imgA.jpg =40%x) | ![post fix](3458-WorkLog/INPFIX.JPG =40%x) ![fix](3458-WorkLog/imgA.jpg =40%x) ![post fix](3458-WorkLog/INPFIX.JPG =40%x)
## AC trouble ## AC trouble
Great! Having sorted out the DCV section so easily, I can now move on to the next error the meter displays on power up; Error 202, Hardware failure - AC board. My clue here is that I don't hear any clicking relays and the fault seems to happen almost instantly. This leads me to suspect that the fault is gitial in nature. Troubleshooting reveals that fuse F701 has blown and the meter now has no 14V supply rail on the AC board. Fixing this by inserting one of the spare fuses allowed me to move on, but the error still persisted. Great! Having sorted out the DCV section so easily, I can now move on to the next error the meter displays on power up; Error 202, Hardware failure - AC board. My clue here is that I don't hear any clicking relays and the fault seems to happen almost instantly. This leads me to suspect that the fault is gitial in nature. Troubleshooting reveals that fuse F701 has blown and the meter now has no 14V supply rail on the AC board. Fixing this by inserting one of the spare fuses allowed me to move on, but the error still persisted.