Thank you to the guys at HEGE supporting Badcaps [ HEGE ] [ HEGE DEX Chart ]

Announcement

Collapse
No announcement yet.

Fisher RS-1056: No Longer Powering Up

Collapse
X
Collapse
 
  • Page of 1
  • Filter
  • Time
  • Show
Clear All
new posts
Previous template Next
    #1

    Fisher RS-1056: No Longer Powering Up

    Hello!

    Went into my Fisher RS-1056 stereo receiver to troubleshoot the damaged meter...

    annnnnnnnnnnnnnnnnnd in the process while the unit was powered up(trying to move meter cover to get at actual meter wires) I touched the cover to one of the transistor's heatsinks. Unit shut down. Took cover off. Unit restarted. Touched cover back. Unit shut down. Repeated said process 1 more time(trying to figure out what's going on) and all of a sudden the unit dies and will not restart. Main transformer is good. On the main power board, there is the proper voltage on all pins EXCEPT for pins 3, 4, and 5. Tuner is totally dead. No voltage leading to resistor R01. Ditto for resistors R04 and R05. All fuses are good and the audio transistors are getting power.


    I'm stumped. Please help.



    Thanks.

    Schematic: https://www.badcaps.net/forum/attach...1&d=1484447932
    Attached Files
    Don't buy those $10 PSU "specials". They fail, and they have taken whole computers with them.

    My computer doubles as a space heater.

    Permanently Retired Systems:
    RIP Advantech UNO-3072LA (2008-2021) - Decommissioned and taken out of service permanently due to lack of software support for it. Not very likely to ever be recommissioned again.
    Asus Q550LF (Old main laptop, 2014-2022) - Decommissioned and stripped due to a myriad of problems, the main battery bloating being the final nail in the coffin.


    Kooky and Kool Systems
    - 1996 Power Macintosh 7200/120 + PC Compatibility Card - Under Restoration
    - 1993 Gateway 2000 80486DX/50 - Fully Operational/WIP
    - 2004 Athlon 64 Retro Gaming System - Indefinitely Parked
    - Main Workstation - Fully operational!

    sigpic
    Tags: None
    #2
    Re: Fisher RS-1056: No Longer Powering Up

    Hello??
    Don't buy those $10 PSU "specials". They fail, and they have taken whole computers with them.

    My computer doubles as a space heater.

    Permanently Retired Systems:
    RIP Advantech UNO-3072LA (2008-2021) - Decommissioned and taken out of service permanently due to lack of software support for it. Not very likely to ever be recommissioned again.
    Asus Q550LF (Old main laptop, 2014-2022) - Decommissioned and stripped due to a myriad of problems, the main battery bloating being the final nail in the coffin.


    Kooky and Kool Systems
    - 1996 Power Macintosh 7200/120 + PC Compatibility Card - Under Restoration
    - 1993 Gateway 2000 80486DX/50 - Fully Operational/WIP
    - 2004 Athlon 64 Retro Gaming System - Indefinitely Parked
    - Main Workstation - Fully operational!

    sigpic

    Comment

      #3
      Re: Fisher RS-1056: No Longer Powering Up

      can you post some pics of the unit, PSBs, point the parts which touched, the pins that do not read good... etc. .. not everyone is familiar with that particular unit and the schematics need time which not everyone is willing to invest, but the visual aid will work for most people familiar with electrocics

      Comment

        #4
        Re: Fisher RS-1056: No Longer Powering Up

        first check all fuses ...if any blown report back before replacing any .
        if all fuses test good with a multi-meter carefully get all power supply voltages . report back with a list of readings .
        example ..
        pin 1 ..12.41v ...
        if negative voltage is read then write like this -21.1v
        use chassis as ground for black meter probe .

        edit ......
        ok i bothered to read the first post ..
        get ac voltages at pins 1 and 2 .. power supply .

        ..i bet you shorted a regulated transistor and blew one of those 1 amp fuses or burned a trace on the board . may have also blown a transistor or 2 .

        if dont see any ac voltages at pins 1 and 2 . check voltages transformer side of the fuses that feed pins 1 and 2 . ..if no voltages then turn power off and ohm out that winding on transformer .
        Last edited by petehall347; 01-15-2017, 01:02 PM.

        Comment

          #5
          Re: Fisher RS-1056: No Longer Powering Up

          ok... popped the fuses. now to find some 1A fuses.
          Don't buy those $10 PSU "specials". They fail, and they have taken whole computers with them.

          My computer doubles as a space heater.

          Permanently Retired Systems:
          RIP Advantech UNO-3072LA (2008-2021) - Decommissioned and taken out of service permanently due to lack of software support for it. Not very likely to ever be recommissioned again.
          Asus Q550LF (Old main laptop, 2014-2022) - Decommissioned and stripped due to a myriad of problems, the main battery bloating being the final nail in the coffin.


          Kooky and Kool Systems
          - 1996 Power Macintosh 7200/120 + PC Compatibility Card - Under Restoration
          - 1993 Gateway 2000 80486DX/50 - Fully Operational/WIP
          - 2004 Athlon 64 Retro Gaming System - Indefinitely Parked
          - Main Workstation - Fully operational!

          sigpic

          Comment

            #6
            Re: Fisher RS-1056: No Longer Powering Up

            make sure the regulator transistor isnt shorted first ..q1 .
            also test the zener diode d05 .
            might be ok because if i am right you shorted q1 collector to ground and the fuses caught the main strike .

            Comment

              #7
              Re: Fisher RS-1056: No Longer Powering Up

              I somehow shorted pins 3 and 4 or 4 and 5 together. That must have been what killed the fuses.
              Don't buy those $10 PSU "specials". They fail, and they have taken whole computers with them.

              My computer doubles as a space heater.

              Permanently Retired Systems:
              RIP Advantech UNO-3072LA (2008-2021) - Decommissioned and taken out of service permanently due to lack of software support for it. Not very likely to ever be recommissioned again.
              Asus Q550LF (Old main laptop, 2014-2022) - Decommissioned and stripped due to a myriad of problems, the main battery bloating being the final nail in the coffin.


              Kooky and Kool Systems
              - 1996 Power Macintosh 7200/120 + PC Compatibility Card - Under Restoration
              - 1993 Gateway 2000 80486DX/50 - Fully Operational/WIP
              - 2004 Athlon 64 Retro Gaming System - Indefinitely Parked
              - Main Workstation - Fully operational!

              sigpic

              Comment

                #8
                Re: Fisher RS-1056: No Longer Powering Up

                deffo test that transistor then .. if it shorted c to e and you power it up the circuits it supplies will see 19v instead of 12 ...

                Comment

                  #9
                  Re: Fisher RS-1056: No Longer Powering Up

                  hmm ok
                  Don't buy those $10 PSU "specials". They fail, and they have taken whole computers with them.

                  My computer doubles as a space heater.

                  Permanently Retired Systems:
                  RIP Advantech UNO-3072LA (2008-2021) - Decommissioned and taken out of service permanently due to lack of software support for it. Not very likely to ever be recommissioned again.
                  Asus Q550LF (Old main laptop, 2014-2022) - Decommissioned and stripped due to a myriad of problems, the main battery bloating being the final nail in the coffin.


                  Kooky and Kool Systems
                  - 1996 Power Macintosh 7200/120 + PC Compatibility Card - Under Restoration
                  - 1993 Gateway 2000 80486DX/50 - Fully Operational/WIP
                  - 2004 Athlon 64 Retro Gaming System - Indefinitely Parked
                  - Main Workstation - Fully operational!

                  sigpic

                  Comment

                    #10
                    Re: Fisher RS-1056: No Longer Powering Up

                    just trying to save you fuses and more damage ...
                    hopefully the semiconductors survived . if not just upgrade them .

                    Comment

                      #11
                      Re: Fisher RS-1056: No Longer Powering Up

                      Any news?

                      Comment

                        #12
                        Re: Fisher RS-1056: No Longer Powering Up

                        Nope. Fisher makes it dang near impossible to check the diodes on that PSU board.
                        Don't buy those $10 PSU "specials". They fail, and they have taken whole computers with them.

                        My computer doubles as a space heater.

                        Permanently Retired Systems:
                        RIP Advantech UNO-3072LA (2008-2021) - Decommissioned and taken out of service permanently due to lack of software support for it. Not very likely to ever be recommissioned again.
                        Asus Q550LF (Old main laptop, 2014-2022) - Decommissioned and stripped due to a myriad of problems, the main battery bloating being the final nail in the coffin.


                        Kooky and Kool Systems
                        - 1996 Power Macintosh 7200/120 + PC Compatibility Card - Under Restoration
                        - 1993 Gateway 2000 80486DX/50 - Fully Operational/WIP
                        - 2004 Athlon 64 Retro Gaming System - Indefinitely Parked
                        - Main Workstation - Fully operational!

                        sigpic

                        Comment

                          #13
                          Re: Fisher RS-1056: No Longer Powering Up

                          can you use a dim bulb tester in circuit on one of these to protect the fuses and see if theres a short?

                          Comment

                            #14
                            Re: Fisher RS-1056: No Longer Powering Up

                            Can we see the pictures of the board we requested?
                            You can test the diode on that power supply board without removing them for now.
                            Never stop learning
                            Basic LCD TV and Monitor troubleshooting guides.
                            http://www.badcaps.net/forum/showthr...956#post305956

                            Voltage Regulator (LDO) testing:
                            http://www.badcaps.net/forum/showthr...999#post300999

                            Inverter testing using old CFL:
                            http://www.badcaps.net/forum/showthr...er+testing+cfl

                            Tear down pictures : Hit the ">" Show Albums and stories" on the left side
                            http://s807.photobucket.com/user/budm/library/

                            TV Factory reset codes listing:
                            http://www.badcaps.net/forum/showthread.php?t=24809

                            Comment

                            Previous template Next
                            Working...
                            X