Electronics > Repair

Tektronix TDS 1012B Repair

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Orion63:
Hi, I have this TDS 2012B which is now showing weird symptoms as follows :
1. When I power it ON, the scope starts up after a long delay (around 2 mins) with the message USB Controller - FAILED.
2. After that it starts up and I can see the CH1 and CH2 waveforms for a brief moment and the scope becomes dead. No display (black screen) no lights.
3. Then, even if I re-cycle power nothing happens, same black screen, No lights.
4. After say 5 minutes, when I power-up the above steps 1-3 repeats.

Any suggestions on the possible cause of failure ?

Regards

coromonadalix:
the power supply section could be bad ?  the first thing to check are the voltages on the capacitors or any test point you may find

try to find a service manual if there is one

tautech:
Which is it ?
1012B or 2012B ?  :-//

If the display backlight is down have you checked the display for activity with a bright torch ?

Orion63:
Sorry for the typo. It is TDS1012B. Replying to the post, the backlight comes back just for a few minutes after I shutdown and power up the scope again.

tautech:

--- Quote from: Orion63 on May 15, 2021, 11:40:12 am ---Replying to the post, the backlight comes back just for a few minutes after I shutdown and power up the scope again.

--- End quote ---
Have you checked if the display is active when the screen is black ?
A bright torch will illuminate any activity if the backlight is down.

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