Tek 2225 Checkout & Repair 

Troubleshooting a Tektronix 2225 50MHz analog oscilloscope.
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Timestamps:
00:00 Tek 2225 Checkout & Repair
3:35 Case Removed, Initial Inspection
5:47 Power On, Power Supply Rail(s) Measurements
7:40 -8.6VDC Rail Adjustment
9:29 RIFA Caps Changed, Volts/Div Switches Cleaned
12:34 Side-by-Side Comparison Before & After - CH.1 Volts/Div
12:50 Side-by-Side Comparison Before & After - CH.2 Volts/Div
13:52 Horizontal Position Dirty Pot
14:00 Pots Cleaned
16:39 Conclusion Start
16:47 A Quick Aside
17:27 Conclusion Finish