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No Power In HP Laserjet 3030 Repaired

By on April 28, 2015
laserjet repairs









My customer sent to me his HP LaserJet 3030 printer which won’t startup (no power). When I asked what caused the problem, he told me there was some problem in the AC network in his area and other devices died too. I decided to take the repairing job and try to bring the printer back to life.

After I checked the printer and disassembled it I started to test the components.

This is the power board of the printer:

hp 3030 laserjet repair

First I checked the fuse which was not blown. Then I moved forward to visual check but no symptoms to any bulged caps or burning. So I decided to check the main parts in the primary circuit, I moved to the bridge rectifier and checked with my ohmmeter if it is shorted but not. ESR meter checked on the main capacitor also found to be good (you need to discharge the main capacitor first before checking it with meter). I powered up the power supply and checked on the main capacitor and got around 320Vdc which was good. So I moved forward to the power driver IC which is a STR-Z2062. I can’t find any datasheet on the internet and I desoldered the IC and checked for shorted legs. I found 6 shorted legs.


STR-Z2062 power driver IC (if somebody have this IC datasheet, it would be great to share it out)

I mean in the IC there was short circuit and I guess the IC was shorted due to the impact of a spikes on the AC network . There were no other bad components in the power primary side. This IC direct drives the transformer primary coil and so supply the unit with a voltage of the secondary coil 2x 150v and 2x36v but there must be a load on the secondary circuit. Without any load on the secondary circuit the power driver IC won’t drive the transformer.

I got a used working IC from a friend from another HP printer (not the same type of printer) and after fixing it and powered On, the printer came back to life again. I used the printer and the scanner for 3 days in my office without any problems. I told my customer about it and he was very happy. It took me about an hour to complete the repair job.












This article was prepared for you by Christian Robert Adzic from Novi Knezevac-Serbia

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  1. moshe

    April 28, 2015 at 9:48 pm

    great article!!

  2. Robert Calk

    April 28, 2015 at 10:00 pm

    Good job Christian. I could not find the datasheet either.

    • vikrant

      April 29, 2015 at 1:57 am

      Dear Christian sir ,thanks for sharing this,As A Computer Technician I know that how difficult is to repair laser printer.It's really nice...all stars...Best wishes!!!

  3. Roberto S.

    April 28, 2015 at 11:23 pm

    There isn't this datasheet.
    This chip is from Sanken - Japan.

  4. Yogesh Panchal

    April 28, 2015 at 11:23 pm

    Sir, Thanks for sharing your experiance please can you share with us what type of load you have connected on the secondary circuit.

    • Chris

      April 29, 2015 at 9:14 pm

      I connected back the board to the printer and that was my load.
      Of course I double checked for any type of schortens or so because a mistake could damage the other part of the printer.
      If I disconnected the board from the other connectors of the printer and try to power on the power board there was no voltage output on the secondary side of the transformer.

  5. Heinrich

    April 29, 2015 at 12:20 am

    I got the IC from a local supplier in South Africa for R107.21 This is the website

  6. Humberto

    April 29, 2015 at 12:34 am

    Great repair
    I could not find the datasheet either
    Best regards.

  7. Albert Hoekman

    April 29, 2015 at 4:54 pm

    Nice job Christian

  8. beh

    April 29, 2015 at 5:30 pm

    well done .goodjob

  9. Dante de Leeuw

    April 29, 2015 at 5:37 pm

    I found the datasheet for you, it is a PDF with data about a range
    of familiar IC's which work the same.

    Find it here :$2dZ2062_21B9545DFA8347C9B95A48B6E16666A9.html

    • Chris

      April 29, 2015 at 9:19 pm

      Thnx Dante for the datasheet file, I got it from Jestine.

      • Jestine Yong

        April 29, 2015 at 9:40 pm

        Hi Chris,

        I found the similar one in this link:


        • Chris

          April 30, 2015 at 2:00 am

          Thnx Jestine for the link. It is usable...

  10. Usman Salihu

    April 29, 2015 at 11:54 pm

    cheek this link for the datasheet

  11. Mark

    April 30, 2015 at 5:40 am

    Hey Chris,
    Thanks for sharing your repair.
    Sometimes the only diagnostic path is once you have eliminated any working components, then the faulty one is the one that remains. It is a tough call on ICs, especially when you have no datasheet.
    Well done.

  12. corriete

    April 30, 2015 at 6:45 pm

    great job. your sharing of information helps us so much. continue to do what you do best.

  13. Anthony

    May 1, 2015 at 5:42 am

    Hi Christian,

    This is the closest I could find,

  14. Waleed Rishmawi

    May 1, 2015 at 5:52 pm

    I find it rather strange that this IC was shorted out in six pins yet the fuse remained intact.

  15. Tito Kanshulu

    May 3, 2015 at 4:23 pm

    Thanks for sharing Chris but my question is the same as that of Waleed.

  16. Chris

    May 8, 2015 at 6:19 pm

    It was strange to me too, 6 pins was shorted but the main fuse was not blow up.At that time I had no datasheet and I can't do I deeper forensic, just analyzing and separate good parts from bad parts. I found no other parts shorten or out of its tolerance range in the whole circuit where that "nice" IC was and I decide to replace the IC and BINGO! the printer was alive again.
    Maybe I had a lucky day, I don't know, but the printer is working after the repair... 🙂

  17. ruddyb

    May 9, 2015 at 12:59 am

    great job love it . thanks you

  18. Inayat Tantry

    October 29, 2015 at 5:51 pm

    I Found the IC STRZ2062 or STR Z2062 at Here

  19. Adrian

    October 2, 2016 at 6:26 pm

    I came to this webpage searching for a way to fix the HP LJ 3030 I've got for free. The person who gave it to me told me that the printer doesn't work at all. I tried to see what's wrong with the printer. It could be turned on but after powering up the display told me to power on power off, the solution to fix this was the one I found on the net- cleaning the mirrors of the scanner.
    The problem I cannot fix is that the print comes out as blank page. I assume the drum is not charged since it is not loaded with toner at all. I checked the status of the big capacitors but they seem to be OK.
    I'm suspecting Q337 and the diode D371 (I tested the diode with a multimeter and it is not conducting at all) the same with the diode D351. Both diodes are marked with a continuous ring and a dashed one, text marked -08 (or 80-). Could anyone tell me what type is the diode?
    and the transistor (equivalent component)?
    BTW, the cartidge is the same as the one in the CANON LBP2900B, and I think the power board should be similar.


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