PM 3055 scopes do not power up
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From: Samuel M. Goldwasser on 18 Oct 2009 13:15 Someone asked me about these oscilloscopes. Apparently he has a dozen of them that do not power up. No display or backlight on the LCD. Yes, AC power is set correctly. I haven't seen them so don't really have any more info. Anything common with these? Thanks! -- sam | Sci.Electronics.Repair FAQ: http://www.repairfaq.org/ Repair | Main Table of Contents: http://www.repairfaq.org/REPAIR/ +Lasers | Sam's Laser FAQ: http://www.repairfaq.org/sam/lasersam.htm | Mirror Sites: http://www.repairfaq.org/REPAIR/F_mirror.html Important: Anything sent to the email address in the message header above is ignored unless my full name AND either lasers or electronics is included in the subject line. Or, you can contact me via the Feedback Form in the FAQs.
From: Samuel M. Goldwasser on 18 Oct 2009 13:16 sam(a)repairfaq.org (Samuel M. Goldwasser) writes: > Someone asked me about these oscilloscopes. Apparently he has a dozen > of them that do not power up. No display or backlight on the LCD. Yes, > AC power is set correctly. I haven't seen them so don't really have any > more info. > > Anything common with these? Should have mentioned that these are Philips analog scopes in case the model is ambiguous. -- sam | Sci.Electronics.Repair FAQ: http://www.repairfaq.org/ Repair | Main Table of Contents: http://www.repairfaq.org/REPAIR/ +Lasers | Sam's Laser FAQ: http://www.repairfaq.org/sam/lasersam.htm | Mirror Sites: http://www.repairfaq.org/REPAIR/F_mirror.html Important: Anything sent to the email address in the message header above is ignored unless my full name AND either lasers or electronics is included in the subject line. Or, you can contact me via the Feedback Form in the FAQs.
From: PlainBill47 on 18 Oct 2009 13:44 On 18 Oct 2009 13:15:00 -0400, sam(a)repairfaq.org (Samuel M. Goldwasser) wrote: >Someone asked me about these oscilloscopes. Apparently he has a dozen >of them that do not power up. No display or backlight on the LCD. Yes, >AC power is set correctly. I haven't seen them so don't really have any >more info. > >Anything common with these? > >Thanks! It appears the schematic can be found here. NOTE: Three parts. http://www.eserviceinfo.com/downloadsm/18092/Fluke-%20Philips_PM3055.html PlainBill
From: Archon on 18 Oct 2009 18:02 Samuel M. Goldwasser wrote: > Someone asked me about these oscilloscopes. Apparently he has a dozen > of them that do not power up. No display or backlight on the LCD. Yes, > AC power is set correctly. I haven't seen them so don't really have any > more info. > > Anything common with these? > > Thanks! > > -- > sam | Sci.Electronics.Repair FAQ: http://www.repairfaq.org/ > Repair | Main Table of Contents: http://www.repairfaq.org/REPAIR/ > +Lasers | Sam's Laser FAQ: http://www.repairfaq.org/sam/lasersam.htm > | Mirror Sites: http://www.repairfaq.org/REPAIR/F_mirror.html > > Important: Anything sent to the email address in the message header above is > ignored unless my full name AND either lasers or electronics is included in the > subject line. Or, you can contact me via the Feedback Form in the FAQs. Electrolytics, almost always on these, throughout the PSU, input attenuator board, XYZ board. Usually all will need replacing, can total 30-40 caps. Tedious job for a 50/60MHz scope. Couple of unavailable IC's in the preamplifier fail regularly causing offset traces. Backlights usually fail on the LCD but you won't know until you get the scope up and running, its just a mini filament lamp, available from www.jetecnet.com JC
From: Samuel M. Goldwasser on 18 Oct 2009 19:14
PlainBill47(a)yahoo.com writes: > On 18 Oct 2009 13:15:00 -0400, sam(a)repairfaq.org (Samuel M. > Goldwasser) wrote: > > >Someone asked me about these oscilloscopes. Apparently he has a dozen > >of them that do not power up. No display or backlight on the LCD. Yes, > >AC power is set correctly. I haven't seen them so don't really have any > >more info. > > > >Anything common with these? > > > >Thanks! > > It appears the schematic can be found here. NOTE: Three parts. > http://www.eserviceinfo.com/downloadsm/18092/Fluke-%20Philips_PM3055.html Yes, thanks, I had already found that. Unfortunately, I don't have them in my possession and I doubt that the person who does would be able to do any serious troubleshooting. -- sam | Sci.Electronics.Repair FAQ: http://www.repairfaq.org/ Repair | Main Table of Contents: http://www.repairfaq.org/REPAIR/ +Lasers | Sam's Laser FAQ: http://www.repairfaq.org/sam/lasersam.htm | Mirror Sites: http://www.repairfaq.org/REPAIR/F_mirror.html Important: Anything sent to the email address in the message header above is ignored unless my full name AND either lasers or electronics is included in the subject line. Or, you can contact me via the Feedback Form in the FAQs. |