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Back to Measurement Equipments 2

Oscilloscope VP-5520C ( National )

[Outline] [Inside view] [Restoration]
[Replace the shorted AC line cable.] [Attach  the air filter.] [Adjustment of the Main A-Sweep rate.]
[Replace the light bulbs for scale illumination.] [Replace a BNC receptacle of CH2 input ]

Fig1. The error was out of specification at first.	Fig.2 Open the top cover.

Fig.3 Time base pwb (top) and sweep pwb (side).	Fig.4 Adjustment points for A-Sweep.

Fig.5 TC1 is for the HF compensation.	Fig.6 After adjustment.