Author Topic: HP 1220A - Repair Advice or resources?  (Read 146 times)

0 Members and 1 Guest are viewing this topic.

Offline JoeShmoe

  • Newbie
  • Posts: 1
  • Country: us
HP 1220A - Repair Advice or resources?
« on: December 05, 2019, 02:50:08 am »
I have not posted onto a forum in quite a long time, so please forgive me if this sounds awkward.

I have an HP 1220A without any probes, I only have the wall adapter.

I plugged it in, nothing displays on the screen no matter which buttons I have pressed or knobs I have turned, no beam or anything. I believe the power unit is faulty and I was wondering if anyone can help me confirm my hypothesis. Using my multimeter I tried to check for voltage across multiple resistors, diodes, and two pins(one labeled 12v- and another 12v+). I didn't get any read outs. I tested continuity on the wall adapter and it seems to work fine, the fuse also is still continuous.

If any more information is needed, I would be happy to provide photos and readings, or clarifications.
 

Offline bob91343

  • Frequent Contributor
  • **
  • Posts: 580
  • Country: us
Re: HP 1220A - Repair Advice or resources?
« Reply #1 on: December 05, 2019, 04:43:59 am »
What wall adapter?  The 1220A runs directly from 120 V power line I believe.  Is there a power pilot lamp?  How about graticule illumination?  Do you measure some continuity across the line voltage plug?

Read the manual.  It tells you how to set up the unit.
 


Share me

Digg  Facebook  SlashDot  Delicious  Technorati  Twitter  Google  Yahoo
Smf