Dell J728N 2700w UPS-Battery disconnected

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • djems3
    Member
    • Nov 2014
    • 32
    • United Kingdom
    #1

    Dell J728N 2700w UPS-Battery disconnected

    Hi .Can anyone help me about this UPS please.
    It wasn't any problem on it before customer said.He just left it on the side for couple of
    months.After they replaced batteries for following use.
    now it says" battery disconnected" alarm #199.
    Batteries voltage is 106v
    charge level level goes up.Thank you.
    Attached Files
    Tags: None
    • djems3
      Member
      • Nov 2014
      • 32
      • United Kingdom
      #2
      Re: Dell J728N 2700w UPS-Battery disconnected

      Battery voltage in the menu is 60v 13% goes up.
      Attached Files

        Comment

        • petehall347
          Badcaps Legend
          • Jan 2015
          • 4427
          • United Kingdom
          #3
          Re: Dell J728N 2700w UPS-Battery disconnected

          wait and see how high it goes .

            Comment

            • petehall347
              Badcaps Legend
              • Jan 2015
              • 4427
              • United Kingdom
              #4
              Re: Dell J728N 2700w UPS-Battery disconnected

              it has 8x12v batteries . best check voltage on each one

                Comment

                • djems3
                  Member
                  • Nov 2014
                  • 32
                  • United Kingdom
                  #5
                  Re: Dell J728N 2700w UPS-Battery disconnected

                  Battery pack has 106v.Every battery have 13.24-13.27 volts
                  Last edited by djems3; 04-07-2021, 12:18 PM.

                    Comment

                    • petehall347
                      Badcaps Legend
                      • Jan 2015
                      • 4427
                      • United Kingdom
                      #6
                      Re: Dell J728N 2700w UPS-Battery disconnected

                      check the fuses and see if there is a reset procedure

                        Comment

                        • djems3
                          Member
                          • Nov 2014
                          • 32
                          • United Kingdom
                          #7
                          Re: Dell J728N 2700w UPS-Battery disconnected

                          When i start outputs in 3-5 sek. start " Alarm #28 DC link Over voltage"

                            Comment

                            • djems3
                              Member
                              • Nov 2014
                              • 32
                              • United Kingdom
                              #8
                              Re: Dell J728N 2700w UPS-Battery disconnected

                              All fuses are ok.I've done reset of alarms and factory reset.

                                Comment

                                • djems3
                                  Member
                                  • Nov 2014
                                  • 32
                                  • United Kingdom
                                  #9
                                  Re: Dell J728N 2700w UPS-Battery disconnected

                                  Does someone has schematic for this model or any similar please.Thank you.
                                  Last edited by djems3; 04-07-2021, 01:06 PM.

                                    Comment

                                    • djems3
                                      Member
                                      • Nov 2014
                                      • 32
                                      • United Kingdom
                                      #10
                                      Re: Dell J728N 2700w UPS-Battery disconnected

                                      Thank you Petehall347 for your answer.I've done it. Problem was broken way between
                                      R17 and R18 because of moisture.
                                      Attached Files

                                        Comment

                                        • petehall347
                                          Badcaps Legend
                                          • Jan 2015
                                          • 4427
                                          • United Kingdom
                                          #11
                                          Re: Dell J728N 2700w UPS-Battery disconnected

                                          i guess it became a fuse .

                                            Comment

                                            • djems3
                                              Member
                                              • Nov 2014
                                              • 32
                                              • United Kingdom
                                              #12
                                              Re: Dell J728N 2700w UPS-Battery disconnected

                                              NO broken path between them.Broken connection because of corrosion .From
                                              this resistors reading battery voltage R17-R18 and R27-R28.
                                              Last edited by djems3; 04-12-2021, 11:57 AM.

                                                Comment

                                                Previous template Next

                                                Related Topics

                                                Collapse
                                                • carrzkiss
                                                  Cyberpower cps1500avr not charging batteries
                                                  by carrzkiss
                                                  Hello, all.

                                                  Cyberpower Battery Backup Unit.

                                                  I bought two new ML18-12 batteries through Amazon (They have already refunded my money for the two batteries as we thought the batteries might have been bad.)
                                                  When I got them in, they were not fully charged. I connected them to the UPS and waited 24 hours before connecting any networking equipment.
                                                  In parallel, they read 24v, but within 24 hours, the meter on the front of the unit dropped from 4 to 3 bars on the battery charge indicator.
                                                  Checking the voltage, it was down to 22v.
                                                  I quickly removed everything...
                                                  06-15-2024, 02:10 PM
                                                • master3112
                                                  Dell Inspiron 5590 Board 18778-1 no charging, charging not possible
                                                  by master3112
                                                  I would like to share my experience about charging issues with Dell power supplies with the tech community. I am working on a Dell Inspiron 5590, Mainboard 18778-1 with charging problems. The device can be switched on and works so far, only the message appears at startup:

                                                  Alert! The AC power adapter wattage and Type cannot be determined. The battery may not change. The System will adjust the performace to match the power available.

                                                  The power supply unit is not recognized in the Bios and the charging process is set to "idle". I use original Dell battery, type...
                                                  07-29-2025, 01:55 PM
                                                • F R 2568
                                                  Dell Latitude 5420 does not start (no post) need help to find the reason why
                                                  by F R 2568
                                                  Hello all,

                                                  this is my first post, so if I make mistakes please do not hesitate to point them out, thank you in advance.

                                                  I got a Dell Latitude 5420 (Service Tag: 7RFM6D3, Motherboard: GDF40 LA-491P Rev.: 2.0 (A01)) which does not start and I want to repair it. These are the symptoms:

                                                  If the laptop is only connected to the AC adapter (battery removed):

                                                  When I press the power button, the keyboard backlight and the display backlight are turning on. Caps key light is lightning, but key does not respond to pressing it.

                                                  The power/battery...
                                                  01-08-2025, 05:45 AM
                                                • diamon
                                                  Looking for Dell Latitude 5520 / 5530 / 5540 RJ45 network connector replacement
                                                  by diamon
                                                  I have a Dell Latitude 5530 with a damaged RJ45 network connector. See the attached pictures.

                                                  Have already searched on Farnell / Aliexpress / Ebay and had contact with several suppliers on Aliexpress and Ebay, but they cannot deliver this connector.
                                                  Is there someone inside the EU, who has these connector(s) or perhaps defective motherboard(s) for these laptop models I have mentioned in the topic title.

                                                  Pictures of these boards:
                                                  Dell Latitude 5520 https://www.ebay.com/itm/256052956663
                                                  Dell Latitude 5530 https://www.ebay.com/itm/125844181534
                                                  Dell...
                                                  4 Photos
                                                  02-28-2024, 12:51 PM
                                                • Bowline
                                                  Dell E6400 PT434 type Battery Charging Stuck at 1%. Battery Pinouts?
                                                  by Bowline
                                                  My question pertains to understanding the control circuity inside a Dell PT434 type battery used in Dell E6400, E6410 and other Dell notebooks?

                                                  Does anyone have a circuit diagram for the inside of a Dell PT434 battery and/or a description of how the control lines work to control this battery?

                                                  My reason for asking is I have a battery which I cannot get to charge beyond 1% in a Dell E6410 or E6400.
                                                  The LED bar graph charge indicator on the battery shows one LED lighted when the info button is pressed.
                                                  I have tried multiple different Dell power adapters. My Dell...
                                                  06-11-2025, 10:13 AM
                                                • Loading...
                                                • No more items.
                                                Working...