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HP8593A Power Supply repair
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Hello all.
First - please excuse my bad English. I am going to share my experience to restore defective HP8593A Power Supply (PS). Nothing useful found in the net...except: you can send PS for repair or buy another one from Ebay.Not reasonable for me, so I decide to repair my self. Looking today at mine notes I see I could write more details, but it is late...PS already repaired, assembled and installed. During time of repair I had no idea my experience can be shared with you...I was very depressed/worried to return my SA to live. Will send today pdf file in Files area with my personal hand made schematics and pictures about this named HP8593A Power Supply repair. I believe information there could be helpful for some of you. Some notes: 1. Original manufacturer: MICRO Energy INC p/n 10-0060 , HP p/n 0950-1977 2. Due hand made schematics drawn from PCB's it is possible to have errors.Schematics are partial for control part of PS and pictures are not very good. 3. Pinout's of PS J13 DB37 connector: +15V - 1,2,3,20,21,22 - 15V - 4,5,6,23,24,25 + 5V - 9,10,11,12,28,29,30,31 +12V - 13,32 Fan - 7 Analog GND - 7,26,27 Digital GND - 14,15,16,17,33,34,35,36 LINE_TRIG - 18 HPWRUP - 37 LPWRON - 19 4. PS has standby power supply designed by UC3842 and P2N85 producing +18V and *always ON.* 5. To switch PS ON connect pin 19 (J13) to GND. 6. PS need minimum 50% of nominal load current of any voltage to produce correct +5.2V. 7. Not clear for me how +5.2V regulator works.For what is transistor TIP30C ? *8. When two PCB's are removed from box you have to connect four GND points with additional wires during repair time. See diagram.* *Two parts of metal box are used as GND wire. Due this all PCB screw have to be installed and well tighten when you finish repair.* 9. When assembly PS after repair be careful with: - one of six screw for mounting of radiator is *shorter! *See drawing. - remember how connector DB37 was. It must be uppermost when assembly back. See drawing. Feel free to ask for questions and good luck ! Regards and 73 Roumen / LZ3RV |
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Hello all,
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Due to our "Files" area restriction ( it is full ) I can not upload what I promised few hours ago. Sorry ! In any case I will send to anyone who wish. Just ask. Regards. Roumen / LZ3RV On Tue, Aug 30, 2011 at 12:52 PM, Roumen Velev <roumen.velev@...>wrote:
Hello all. |
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Artekmedia
Upload it to KO4BB.com....
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On 8/30/2011 9:07 AM, Roumen Velev wrote:
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Dave& Lynn Henderson Manuals@... www.Artekmedia.com PO Box 175 Welch,MN 55089 |
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Hello KO4BB,
Thanks for invitation. Upload done. Regards/Roumen LZ3RV On Tue, Aug 30, 2011 at 5:14 PM, Artekmedia <manuals@...> wrote: ** [Non-text portions of this message have been removed] |
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Clint
Hello Roumen,
I have just found your post about the MicroEnergy PSU unit for a HP8593A with P/N 0950-1977, I think you have "hand drawn" a circuit diagram, excellent, I have been thinking to do the same as I still have a Faulty Power Supply here, if you do not mind can you send me your drawings please, many thanks! Clint - VK3CSJ Melbourne |
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Hello Clint,
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Have them sent to your personal mail. Regards. Roumen / LZ3RV On Thu, Sep 22, 2011 at 9:00 PM, Clint <clintonjeffrey1@...> wrote:
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Hi Hank , All I have will send to your personal E-mail.On Mon, Oct 13, 2014 at 7:52 PM, weyster@... [hp_agilent_equipment] <hp_agilent_equipment@...> wrote:
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Hi Roumen,
I too have a 8593A and there is no display. HPWRUP signal (5V) comes for a second and goes down to zero after Power On. All the supply LEDs are glowing. However the +5.2 V drops to about 4V. I am unable to understand whether this is power supply issue or motherboard issue. What is the function of Line trigger? and is 2.5V on this terminal OK, if you remember. Please send the schematic on my e-mail id. Thanks for your favour. kailashkhairnar@... kailashkhairnar@... Regards, Kailash Khairnar India |
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Hi all, Update: Symptom: No display in HP8593A with low supply rail (+5V) after initial power up. I tested the power supply on bench with 2.5A load on +5V, 0.8A each on +/- 15V. The power supply was up and running fine. Short Pin 19 with 17 to bring on PS. There was no fault in any of the electrolytics. So prepared Power supply extension cable (1 mtr length) ?for the 37 pin D-connector as it was not feasible to test the voltages on pins. And voila!! the spectrum was up and running. I switched it off and on several times to confirm the power supply was not in fault. The HPWRUP signal from power supply(Pin 37) to Controller board feeds 74HC14 gate and o/p is again inverted by 2-i/p distinct nand gates to obtain LRST and LHLT signals to the processor. When the CPU is halted the current drawn falls below the PS required threshold and hence the PS stops regulating. 1. It was the Power supply unit connector fault and several attempts were made to onstall the P/S but the result was not consistent sometimes the SA would come ON and some times not. There was loose connection in the mating 37-pin D-connectors. The D-connector on the P/S unit mounting was then bent outwards by about 2mm to ensure proper mating, but then that lost flexibility of adjusting the connectors mating. The Connector on the Power supply can move about 3-4mm sideways to ensure the mating on the main board. That was not a problem as once installed there is no need to move the power supply again till it fails. Line trigger is the signal used by the SA in its trigger function. Thanks for the one who made the circuit schematic available of the board. Thanks Roumen for the schematic of Power supply. Thanks for your inputs. Regards, Kailash Khairnar On Sun, Jan 31, 2016 at 9:48 AM, AMiTHA <amitha.my@...> wrote:
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Roumen, ????? I would like to have a copy of the power supply schematics if it is possible.? My HP8591A has the low 5.2 volt supply problem that others have mentioned.? I am very experienced in this type of electronics and I would like to find a solution that is lasting and that I can share with others. ??????We have a family friend in Burgas and relatives in Russia, we are in the US. ? Ted |
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John
see msg# 67510 in the group messages..
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Regards John On 17-Feb-16 5:00:31 AM, newsong777@... [hp_agilent_equipment] (hp_agilent_equipment@...) wrote:Roumen,I would like to have a copy of the power supply schematics if it is possible. My HP8591A has the low 5.2 volt supply problem that others have mentioned. I am very experienced in this type of electronics and I would like to find a solution that is lasting and that I can share with others. |
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John, ??? Thank you for your help. Ted From: "John gielisj@... [hp_agilent_equipment]" To: hp_agilent_equipment@... Sent: Tuesday, February 16, 2016 8:36 PM Subject: Re: [hp_agilent_equipment] Re: HP8593A Power Supply repair see msg# 67510 in the group messages.. Regards John > On 17-Feb-16 5:00:31 AM, newsong777@... [hp_agilent_equipment] (hp_agilent_equipment@...) wrote: > > Roumen, >? ? ? I would like to have a copy of the power supply schematics if it is possible.? My HP8591A has the low 5.2 volt supply problem that others have mentioned.? I am very experienced in this type of electronics and I would like to find a solution that is lasting and that I can share with others. >? ? ? We have a family friend in Burgas and relatives in Russia, we are in the US. > > Ted > >? ? ? ? Posted by: newsong777@... > >? ? ? ? ? ? ? ? ? ? ? ? ? Reply via web post[Links to https://groups.yahoo.com/neo/groups/hp_agilent_equipment/conversations/messages/73964] >? ? ? ? ? ? ? ? ? ? ? ? ? > >? ? ? ? ? ? ? ? Reply to sender? ? ? ? ? ? [Links to mailto:newsong777@...?subject=Re%3A%20HP8593A%20Power%20Supply%20repair] >? ? ? ? ? ? ? > >? ? ? ? ? ? ? Reply to group? ? ? ? ? ? [Links to mailto:hp_agilent_equipment@...?subject=Re%3A%20HP8593A%20Power%20Supply%20repair] >? ? ? ? ? ? ? > ------------------------------------ ------------------------------------ ------------------------------------ Yahoo Groups Links <*> To visit your group on the web, go to: ? ? http://groups.yahoo.com/group/hp_agilent_equipment/ <*> Your email settings: ? ? Individual Email | Traditional <*> To change settings online go to: ? ? http://groups.yahoo.com/group/hp_agilent_equipment/join ? ? (Yahoo! ID required) <*> To change settings via email: ? ? hp_agilent_equipment-digest@... ? ? hp_agilent_equipment-fullfeatured@... <*> To unsubscribe from this group, send an email to: ? ? hp_agilent_equipment-unsubscribe@... <*> Your use of Yahoo Groups is subject to: ? ? https://info.yahoo.com/legal/us/yahoo/utos/terms/ |
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Roumen, ???? Thank you for your help and for the schematic.? I know that you put a lot of reverse-engineer time in on that power supply.? I also found the 5.2 volt supply to be an enigma.? I have never seen anything like it.? In order to understand it, some more information is needed.? I will let you know what I come up with. ???? I like to create circuits that do not work and place them in tests to be given to potential employees.? This looks almost like one of those. Ted From: "roumen.velev@... [hp_agilent_equipment]" To: hp_agilent_equipment@... Sent: Wednesday, February 17, 2016 12:08 AM Subject: [hp_agilent_equipment] Re: HP8593A Power Supply repair
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Hi Ted,
Hand made diagrams sent to your personal Email. Wish you success. Regards/Roumen LZ3RV Sofia, Bulgaria |
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No guarantees on this schematic. Best thing that I could come up with for these spectrum analyzers.
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HP / Agilent / Keysight seems to want to keep these things a secret. John, Vista, CA WB6IQS -------------------------------------------- On Fri, 2/19/16, Michael Daniel newsong777@... [hp_agilent_equipment] <hp_agilent_equipment@...> wrote:
Subject: Re: [hp_agilent_equipment] Re: HP8593A Power Supply repair To: "hp_agilent_equipment@..." <hp_agilent_equipment@...> Date: Friday, February 19, 2016, 2:31 PM John,??? Thank you for your help.Ted From: "John gielisj@... [hp_agilent_equipment]" <hp_agilent_equipment@...> To: hp_agilent_equipment@... Sent: Tuesday, February 16, 2016 8:36 PM Subject: Re: [hp_agilent_equipment] Re: HP8593A Power Supply repair see msg# 67510 in the group messages.. Regards John > On 17-Feb-16 5:00:31 AM, newsong777@... [hp_agilent_equipment] (hp_agilent_equipment@...) wrote: > > Roumen, [Non-text portions of this message have been removed] |
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On 2/19/2016 6:18 PM, wb6iqs@... [hp_agilent_equipment] wrote:
No guarantees on this schematic. Best thing that I could come up withJohn I don't think HP /Agilent was keeping them secret for some revenue generating purpose I suspect that since these power supplies were provided by a 3rd party and weren't an HP design that they were bound by a legal "non-disclosure agreement" with the supplier not to publish the schematic Dave ArtekManuals -- Dave Manuals@... www.ArtekManuals.com |
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Steve Reeves
¿ªÔÆÌåÓýProbably the same for the display module. Steve Sent from my iPod On Feb 19, 2016, at 7:37 PM, "Artek Manuals manuals@... [hp_agilent_equipment]" <hp_agilent_equipment@...> wrote:
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