WAVETEK SCHLUMBERGER STABILOCK 4031 Repair and Fix скачать в хорошем качестве

WAVETEK SCHLUMBERGER STABILOCK 4031 Repair and Fix

WAVETEK SCHLUMBERGER STABILOCK 4031 Repair and Fix Thanks to Paul Kelly G3SDH for the Repair documents and web information. https://groups.io/g/Wavetek-test-equi... Download service manuals. Do these repairs at your own risk, this video is for information only. The 4031 RF Attenuator fix can be found on the following link.    • WAVETEK Schlumberger Stabilock SI 403...   This is a comprehensive repair, you will need the service manual, for card and component identification. If the Power supply rails , 5v, 15 and -15v are correct check the rear Card 1 10Mhz output is not drifting, if all OK move onto the removable cards, change all the 10uF, 2.2uF, 22uF, 47uF and 100uF SMD capacitors, around 50-70 caps, take your time and check all the tracks after replacing the capacitors. I would suggest trying a few different removal techniques. I also checked all the SMD RF coils/chokes on every Panel. Two were found to be open circuit. UHF SYNTH 213-041 BOARD 461-436 03, REPLACE L3 560nH FM Modulator 217 031 BOARD 461 455 05, REPLACE L3 10uH. To do in circuit tests, you will need Riser/extender cards. Not all the cards have capacitors that need changing but i would recommend a visual inspection for damaged tracks, dry joints etc.