HP DesignJet 5500 Power Supply is not working does anyone know what Caps that could cause this to fail on the PS Board.
(It has volts +3, +5, -15) (It doesn’t have +12, +24, +36.)
Last edited by ShelbyStang; 12-02-2011, 08:19 PM.
Reason: correct wording
Open up your power supply CAREFULLY
then look for burnt parts and bloated caps
If you have an ESR cap tester meter look for caps that have high ohm reading
I just repaired a Dell power supply for a printer
I found one mosfet
I found two caps with high ESR reading and these where not bloated
After changing these part the power supply works agian
I hope this helps
9 PC LCD Monitor
6 LCD Flat Screen TV
30 Desk Top Switching Power Supply
10 Battery Charger Switching Power Supply for Power Tool
6 18v Lithium Battery Power Boards for Tool Battery Packs
1 XBox 360 Switching Power Supply and M Board
25 Servo Drives 220/460 3 Phase
6 De-soldering Station Switching Power Supply 1 Power Supply
1 Dell Mother Board
15 Computer Power Supply
1 HP Printer Supply & Control Board * lighting finished it *
These two repairs where found with a ESR meter...> Temp at 50*F then at 90*F the ESR reading more than 10%
1 Over Head Crane Current Sensing Board ( VFD Failure Five Years Later )
2 Hem Saw Computer Stack Board
All of these had CAPs POOF
All of the mosfet that are taken out by bad caps
For all who want to repair HP DESIGNJET 5000 5500 Power supply's
Produced by Delta - DPS-386AP PN:2958006202
I repaired 3 Power Supplies' and found 2 relevant -1x 10 (C33) u 1x 47u (C35) bad caps.
I will add some Pictures
There were some other not good Caps - all 10, 22, 47 uF same manufacturer
But it is good to measure ESR (>30 Ohm)
Open up your power supply CAREFULLY
then look for burnt parts and bloated caps
If you have an ESR cap tester meter look for caps that have high ohm reading
I just repaired a Dell power supply for a printer
I found one mosfet
I found two caps with high ESR reading and these where not bloated
After changing these part the power supply works agian
I hope this helps
Hello and thanks for your report. I'm Sascha from Germany and have a question. Which Mosfet with the power supply was defective? Many thanks for your response.
Hello and thanks for your report. I'm Sascha from Germany and have a question. Which Mosfet with the power supply was defective? Many thanks for your response.
The mosfet next to the switching IC chip was the one I replaced and the switching IC chip as well as all the caps
9 PC LCD Monitor
6 LCD Flat Screen TV
30 Desk Top Switching Power Supply
10 Battery Charger Switching Power Supply for Power Tool
6 18v Lithium Battery Power Boards for Tool Battery Packs
1 XBox 360 Switching Power Supply and M Board
25 Servo Drives 220/460 3 Phase
6 De-soldering Station Switching Power Supply 1 Power Supply
1 Dell Mother Board
15 Computer Power Supply
1 HP Printer Supply & Control Board * lighting finished it *
These two repairs where found with a ESR meter...> Temp at 50*F then at 90*F the ESR reading more than 10%
1 Over Head Crane Current Sensing Board ( VFD Failure Five Years Later )
2 Hem Saw Computer Stack Board
All of these had CAPs POOF
All of the mosfet that are taken out by bad caps
Delta seems to really like Ltec and Taicon capacitors, they also seem to fail for everyone else a lot earlier than they do for them. I think the guys at Delta do their own in-house testing and don't blindly trust the datasheets provided by the cap manufacturers. But they do eventually fail.
Originally posted by PeteS in CA
Remember that by the time consequences of a short-sighted decision are experienced, the idiot who made the bad decision may have already been promoted or moved on to a better job at another company.
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