Panasonic SU-HTB18 dead power supply (unidentified transistor)

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • Dannyx
    CertifiedAxhole
    • Aug 2016
    • 3912
    • Romania

    #1

    Panasonic SU-HTB18 dead power supply (unidentified transistor)

    Good day folks. I had a look at this soundbar from Panasonic today and it seemed like an easy enough fix, but then I got stuck.

    Have a look at that fried primary. I reckon the transistor popped and took out the current sense resistors with it before the fuse could open to cut the power. I thought I'd have a hard time figuring out what values those are, as it usually happens when SMD resistors go up in smoke, but thankfully I was able to clean them enough to read 1r60 on there, which is 1.6ohms, so that was sorted - we need 8 of those.

    On to the transistor: it's one of those mystery parts that no one's heard of. 14SL70....what could this be ? Ironically, it has a little logo there too, but all searches come out empty. I tried everything, including sourcing a service manual, but that didn't yield any results either....I'm tempted to just dig through my parts bin and pick one out semi-randomly. I'm hoping the control IC survived, because the small passives around it are fine, so I'm hoping something from the FQPF series will work in place of the original one. It claims to be a 120w amp, in case someone wants to suggest something based on past experience, enough to be in the ballpark. As always, thanks for any help. Cheers.
    Attached Files
    Wattevah...
  • zen
    Badcaps Veteran
    • Apr 2011
    • 511

    #2
    Re: Panasonic SU-HTB18 dead power supply (unidentified transistor)

    Hi

    Regards the F E T , you can probably match up another . By the numbering seems to be rated at 14 amp , 700 volt . I don't recognise the manufacturer logo either .

    I would replace the drive chip also . Doubt it would have survived .


    Regards Zen

    Comment

    • Dannyx
      CertifiedAxhole
      • Aug 2016
      • 3912
      • Romania

      #3
      Re: Panasonic SU-HTB18 dead power supply (unidentified transistor)

      The driver IC is also tough to find info on. I don't have the board in front of me right now, since it's at the office, but we can just about make out the part number in this pic....

      I'd say it's MIP034c and below 714c4? (C or 0) - we won't know for sure until I look at it up close, but it doesn't matter because I tried every combination and nothing came up - HATE it when manufacturers do this and somehow manage to source the most obscure parts on the planet
      Attached Files
      Wattevah...

      Comment

      • zens electronics
        Member
        • Jan 2021
        • 31
        • uk

        #4
        Re: Panasonic SU-HTB18 dead power supply (unidentified transistor)

        Makes thrings very difficult for us , i know .

        No schematics ?

        Comment

        • Dannyx
          CertifiedAxhole
          • Aug 2016
          • 3912
          • Romania

          #5
          Re: Panasonic SU-HTB18 dead power supply (unidentified transistor)

          No, no schematics.....of course

          I tried searching for SU-HTB and indeed found a service manual, but the schematic isn't even close - that one has a separate STBY power supply, even some relays and sh!t. It's for a HTB500.

          Turns out there IS such a thing as "MIP" series IC, since on page 92 you've got IC5799 which is a mip2f20 which DOES at least return some results on google, as do other searches for "panasonic MIP IC". Meanwhile mine gets nothing...

          I'll try the transistor+resistors first and if it goes bang again, that's it - tough luck - it's going in the bin....
          Last edited by Dannyx; 01-23-2021, 04:05 PM.
          Wattevah...

          Comment

          • sam_sam_sam
            Badcaps Legend
            • Jul 2011
            • 6023
            • USA

            #6
            Re: Panasonic SU-HTB18 dead power supply (unidentified transistor)

            Dannyx

            Try this website to see if you can match the device manufacturer

            https://how-to.fandom.com/wiki/How_t...heir_logos/P-T

            I do not recognize this manufacturers logo

            There are no hits on this part number which is very strange most of time you would get something even if it is the wrong device ( but nothing at all weird ) unless it is a house part number

            Can you determine what the output voltage is by any chance————>

            I do not know if this will help you or not
            Last edited by sam_sam_sam; 01-24-2021, 08:29 PM.

            Comment

            • Dannyx
              CertifiedAxhole
              • Aug 2016
              • 3912
              • Romania

              #7
              Re: Panasonic SU-HTB18 dead power supply (unidentified transistor)

              Originally posted by sam_sam_sam
              Can you determine what the output voltage is by any chance————>
              The closest I can get to doing this is by assuming the part number on the transistor stands for 700v, 14A as zen suggested. Like I said - I'll dig through my parts bin and go with the highest spec'd I can find and just YOLO it...

              The output of the supply itself to the amp section could be anywhere between 30v and 60v based on my limited past experience with amps.

              The amp claims it's 120w...not sure if this is reflected by the transistor's ratings in any way, since it's a SMPS...
              Wattevah...

              Comment

              • Dannyx
                CertifiedAxhole
                • Aug 2016
                • 3912
                • Romania

                #8
                Re: Panasonic SU-HTB18 dead power supply (unidentified transistor)

                I ran a search on Aliexpress and it does actually throw some transistors in there, like 2n60f, so I'm actually curious if they're regarded as equivalents....

                There IS such a thing as SL701, but that's a different part entirely....
                Last edited by Dannyx; 01-25-2021, 11:04 AM.
                Wattevah...

                Comment

                • Dannyx
                  CertifiedAxhole
                  • Aug 2016
                  • 3912
                  • Romania

                  #9
                  Re: Panasonic SU-HTB18 dead power supply (unidentified transistor)

                  Ok, I made some more progress on this thing: I actually managed to find the IC: it's a MIP004, when I thought all along the second 0 is a 6, so there IS an official Panasonic datasheet for it here. It's probably dead (Jim ), since the two 47ohm SMD resistors next to it are open-circuit, so I'm not risking firing it up like this.

                  For the FET, I dug through my drawer of transistors and after comparing and contrasting several types, I think I'll go with the P14NK50ZFP.
                  Wattevah...

                  Comment

                  • Dannyx
                    CertifiedAxhole
                    • Aug 2016
                    • 3912
                    • Romania

                    #10
                    Re: Panasonic SU-HTB18 dead power supply (unidentified transistor)

                    Ok, I took a shot at powering it up today. I couldn't source a MIP004 anywhere, much less so in SMD form, so I just replaced those resistors and tried it with a lightbulb in series. Ironically, nothing explosive happened: the bulb went dim, but it also produced no output. Measuring the VCC pin of the IC, I can see it jumping between 0 and 19v repeatedly, so this makes me think it's dead and doesn't drive the output....I'm now hoping to be able to replace it with a "FAN" IC by comparing datasheets as much as I can....
                    Wattevah...

                    Comment

                    • Dannyx
                      CertifiedAxhole
                      • Aug 2016
                      • 3912
                      • Romania

                      #11
                      Re: Panasonic SU-HTB18 dead power supply (unidentified transistor)

                      Ok guys, believe it or not I got this thing working I wasn't able to find a MIP004 IC in SMD form, so I got the DIP package instead - better than nothing - and botch-soldered it where the original SMD one used to be. I didn't want to use wires and extend the leads, which would've obviously made the job easier, because I was afraid the added resistance/capacitance would cause interference somehow and cause stuff to pop, so I kept everything as short and compact as possible.

                      Amazingly, it works, even in that ghetto state I sure hope it LASTS, especially once the subwoofer is connected which increases the load on the power supply, since I'm not sure what the specs of the original transistor was. I went with a P14NK50ZFP for reference.
                      Attached Files
                      Wattevah...

                      Comment

                      • Dannyx
                        CertifiedAxhole
                        • Aug 2016
                        • 3912
                        • Romania

                        #12
                        Re: Panasonic SU-HTB18 dead power supply (unidentified transistor)

                        Just realized I mistakenly attached a pic of a CPU I was trying to sell too
                        Wattevah...

                        Comment

                        • DjKrish
                          Badcaps Veteran
                          • Oct 2012
                          • 354
                          • SG

                          #13
                          Re: Panasonic SU-HTB18 dead power supply (unidentified transistor)

                          Originally posted by Dannyx
                          Ok guys, believe it or not I got this thing working I wasn't able to find a MIP004 IC in SMD form, so I got the DIP package instead - better than nothing - and botch-soldered it where the original SMD one used to be. I didn't want to use wires and extend the leads, which would've obviously made the job easier, because I was afraid the added resistance/capacitance would cause interference somehow and cause stuff to pop, so I kept everything as short and compact as possible.

                          Amazingly, it works, even in that ghetto state I sure hope it LASTS, especially once the subwoofer is connected which increases the load on the power supply, since I'm not sure what the specs of the original transistor was. I went with a P14NK50ZFP for reference.
                          I had the same problem with this unit, unable to find the SMD version of MIP004, i replaced with DIP instead. Works fine but i used wire instead due to lack of space. A thick one

                          Comment

                          • lti
                            Badcaps Legend
                            • May 2011
                            • 2545
                            • United States

                            #14
                            Re: Panasonic SU-HTB18 dead power supply (unidentified transistor)

                            I found that the manufacturer is Advanced Power Electronics Corporation (APEC, not ApECOR - there are two companies with the same name), but I didn't find that part.

                            http://www.a-power.com.tw/index.aspx?lang=eng&fn=index

                            Comment

                            • sam_sam_sam
                              Badcaps Legend
                              • Jul 2011
                              • 6023
                              • USA

                              #15
                              Re: Panasonic SU-HTB18 dead power supply (unidentified transistor)

                              Originally posted by Dannyx
                              Ok guys, believe it or not I got this thing working I wasn't able to find a MIP004 IC in SMD form, so I got the DIP package instead - better than nothing - and botch-soldered it where the original SMD one used to be. I didn't want to use wires and extend the leads, which would've obviously made the job easier, because I was afraid the added resistance/capacitance would cause interference somehow and cause stuff to pop, so I kept everything as short and compact as possible.

                              Amazingly, it works, even in that ghetto state I sure hope it LASTS, especially once the subwoofer is connected which increases the load on the power supply, since I'm not sure what the specs of the original transistor was. I went with a P14NK50ZFP for reference.

                              I like your ghetto fix you got to do what you got to do to make it work

                              Comment

                              • Dannyx
                                CertifiedAxhole
                                • Aug 2016
                                • 3912
                                • Romania

                                #16
                                Re: Panasonic SU-HTB18 dead power supply (unidentified transistor)

                                UPDATE: since the post received some recent attention, I thought I'd just say the thing still works, since I haven't heard from the client since
                                Wattevah...

                                Comment

                                • SYNK Management
                                  New Member
                                  • Dec 2024
                                  • 1
                                  • Malaysia

                                  #17
                                  Originally posted by Dannyx
                                  Re: Panasonic SU-HTB18 dead power supply (unidentified transistor)

                                  UPDATE: since the post received some recent attention, I thought I'd just say the thing still works, since I haven't heard from the client since
                                  Hi sir,
                                  Could you please share which components were replaced? I'm currently facing a similar issue with my Panasonic SU-HTB18. I came across your thread and would like to try fixing it myself, inspired by your successful case. Thank you so much for your sharing here!
                                  Last edited by SYNK Management; 12-06-2024, 09:40 PM.

                                  Comment

                                  • Dannyx
                                    CertifiedAxhole
                                    • Aug 2016
                                    • 3912
                                    • Romania

                                    #18
                                    Go through the thread again in order - it covers all the components I replaced. Good luck.
                                    Wattevah...

                                    Comment

                                    • petehall347
                                      Badcaps Legend
                                      • Jan 2015
                                      • 4423
                                      • United Kingdom

                                      #19
                                      14SL701

                                      Comment

                                      • R_J
                                        Badcaps Legend
                                        • Jun 2012
                                        • 9515
                                        • Canada

                                        #20
                                        Seems to be AP14SL70I, I did find a datasheet for a AP14SL50I which might help

                                        Their website is Products | A-Power
                                        Attached Files
                                        Last edited by R_J; 12-08-2024, 01:56 PM.

                                        Comment

                                        Related Topics

                                        Collapse

                                        • Tynan Dill
                                          Vizio e601i-A3 - Has Sound and Display, But No Backlight - Bad Power Supply Board or Bad LED Bulbs ?
                                          by Tynan Dill
                                          I was given this TV from my great uncle. He said it just wouldn't turn on one day out of nowhere, replaced the TV, and gave it to me to possibly fix and use for myself.

                                          Upon bringing it home and plugging it up, it showed a standby light.

                                          I powered it on and without a flashlight, the display showed the "V" but the lighting is very dim, but visible.

                                          The screen seems to blackout and stay black, but with a flashlight I can see the display.

                                          With my Playstation 4 connected via HDMI, and running a game I can hear sound.

                                          Assuming...
                                          11-22-2024, 01:46 PM
                                        • Andreas_de
                                          Power supply Manson NTP-5561 (5661) LCD controller dead - PIC18F87K90 HEX dump required
                                          by Andreas_de
                                          Hello!

                                          i got a damaged Manson NTP-5561 (60V, 1,6A DC output) and and the main issue is that the controler IC for the LCD display has a short. The controler IC PIC18F87K90 is mounted on the back of the back of the LCD. Vss-Vdd = 3 Ohm. The 5V and 3,3V power line was killed as well, but that is not a problem. A new LDO 3,3V and 5V 7805 is already ordered.
                                          Replacing the PIC18F87K90 is necessary but that makes no sense without having the HEX dump of the new controler.

                                          Does anybody have such a power supply and could do a HEX dump of the Flash and EEPROM memory?
                                          ...
                                          04-12-2025, 10:38 AM
                                        • sam_sam_sam
                                          Desoldering gun station modified to use a 18 volt @ 20 amp switching power supply
                                          by sam_sam_sam
                                          I have wanting to do this project for quite sometime now and I finally found a switching power supply that will work on this desoldering gun station ZD-915 that the original switching power supply took a shit and just was not worth trying to fix it because this switching power is not quite big enough to handle the heater element and the vacuum pump

                                          One note when I tested the switching power supply and the voltage control board I noticed that this desoldering gun heat up much faster than the original switching power supply which I was really surprised by to the point that I might buy...
                                          03-31-2024, 02:12 PM
                                        • sam_sam_sam
                                          Panasonic switching power supply daughter board has two 27uf @ 50 volt capacitors which I do not keep in stock
                                          by sam_sam_sam
                                          I did not have any 27uf @ 50 volt capacitors but one nice thing is that it has enough room for two capacitors in parallel a 22uf and a 4.7uf @ 50 volts 22 plus 4.7 equals 26.7uf which so very close to 27uf I will show some pictures of it sometime tomorrow

                                          This is one of the shit est boards I seen in a very long time and it was the daughter board the traces just lifting off the board I had to use the capacitor leads to repair the the traces and the main board is not any better because I had to repair several traces for the daughter board to the main board

                                          After all of...
                                          07-13-2024, 08:14 PM
                                        • KYBOSH
                                          Eufy Floodlight Cam 2 Pro Dead. Power Supply issue...
                                          by KYBOSH
                                          I have a floodlight-security camera that recently died on me.



                                          its hardwired to 115v po115v outlet. One evening it simply died. After some troubleshooting (ensuring it had power and ensuring the electronics were actually functional by supplying 5v via usb port) i realized the power supply must be the issue. The supply was noticably warm to the touch even though it was not powering anything.

                                          Trying to understand what i was up against i went looking for others with similar issues and anyone who might have attempted a repair. While a few ppl have had the...
                                          07-01-2024, 06:54 AM
                                        • Loading...
                                        • No more items.
                                        Working...