7CT1N/Repairs

Steps cannot be adjusted

Problem: Number of steps could not be adjusted.

Root cause: resistive element of R100 (steps potentiometer) was cracked into two halves

Solution: Replace R100

--Peter (talk) 02:03, 4 May 2019 (PDT)

Pushbutton switch repairs

• See https://amplifier.cd/Test_Equipment/Tektronix/Tektronix_7000_series_special/7CT1N_SchalterRep.pdf (in German, with photos)

Under-rated capacitors

C30 and C32 (100 μF, 25 V) are under-rated and therefore have a tendency to leak or short, causing associated resistors R30 and R32 (240 Ω, 0.25 W, 5%) to overheat and fail. C30 and C32 should be replaced with modern equivalents rated above 35 V.