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Another eBay find - a Tektronix 2230 oscilloscope with a strange fault symptom! Also appears someone had a go at this before. Can I fix this one? Not looking good so far...
Part 2 here kzbin.info/www/bejne/imScnZhofrp-jKM
0:00 - Overview
6:00 - Someone has had a go at this!
6:30 - First impressions/visual inspection
9:18 - Storage board lift instructions
11:18 - dodgey soldering and desoldered jumper wires!
14:00 - Attenuator shield removal/further visual inspection
17:44 - Broken knob for Channel 2 attenuator revealed
20:08 - Faulty Cursor select pot/leads ripped
21:37 - visual inspection of power supply section
23:55 - power supply voltage rail testing
28:11 - cursor pot wiring repaired
30:07 - jumper wires reconnected on CH1 & CH2 logic boards
31:16 - verifying ‘probe adj’ operation w/ external scope
35:04 - Isolation of analog circuitry from digital/conclusion