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Old 19th Mar 2018, 3:20 pm   #1
Electrical Rod
Retired Dormant Member
 
Join Date: Mar 2018
Location: Hahira, Georgia, USA.
Posts: 32
Default Telequipment D54 ?

New to the forum so I thought this would be a good place to ask a few questions.
I purchased the D54 scope a couple months ago and was working good, all of the front controls seem to have no problems.
Over the last couple weeks I lost the sweep and all I get is a vertical trace that can be controlled but will not display a 6.5 volt AC sine wave. I can control the length of this test voltage by the volts division and position from both ch. 1 and ch. 2.
Going by the May 1974 manual which is not exactly correct for this scope but close, I have TR107 shown as a 3 pin FET transistor and this scope uses a 4 pin FET.
TR107 in this scope is bad. I`m trying to figure out exactly what this transistor is and if I can find one. Seem to be obsolete for the most part, but i`m sure something may work.
More information will be included as needed.
Thanks
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