Psom circuit help

Collapse
X
Collapse
 
  • Page of 2
  • Time
  • Show
Clear All
new posts
Previous 1 2 template Next
  • redwire
    Badcaps Legend
    • Dec 2010
    • 3912
    • Canada
    #21
    Re: Psom circuit help

    This is a custom Ford IC. IC1 70013FB Motorola looks like five subsystems in it. 9V regulator (pin 1,2,16) with IGN shutdown (pin 6), 5V regulator (pin 16 in,15 out), variable-reluctance pickup amplifier from rear axle (pin 10,11), and then that speed output (pin 14) to the MCU or cruise control. Reset pulse (pin 15). GND is pins 4,5,12,13.
    It's important to get at least 9V and 5V power up and running.
    Mystery pin 8 seems to go to the MCU or the white connector. There might be a pulsing watchdog feature in the IC, so the MCU sends pulse to it on pin 8 and if nothing there, then IC1 a reset pulse gets made.
    Really with no datasheet this is just guessing.

    Originally posted by RJARRRPCGP
    "666 Hz" -> LOL!
    At 666Hz I hear music, AC/DC Highway to Hell... playing in the Ford.

      Comment

      • Hornnumb2
        Badcaps Veteran
        • Feb 2011
        • 218
        #22
        Re: Psom circuit help

        So if you were a betting man, I should remove the IC1 from working board and hope that takes care of problem?

          Comment

          • Hornnumb2
            Badcaps Veteran
            • Feb 2011
            • 218
            #23
            Re: Psom circuit help

            Would you think IC4 is some type of controller?

              Comment

              • stj
                Great Sage 齊天大聖
                • Dec 2009
                • 31139
                • Albion
                #24
                Re: Psom circuit help

                ic4 is a microcontroller - probably from motorola,
                ic2 is an eeprom for running data - probably your mileage etc.

                  Comment

                  Previous 1 2 template Next

                  Related Topics

                  Collapse
                  • Astonished
                    Fixing the Charge Circuit of the Batteries of the DC Motor
                    by Astonished
                    Hi friends of electronics

                    What you see in the video and pictures attached is the circuit for charging the batteries of a DC motor.

                    The problem is that this circuit cannot charge the batteries (3 1800mAH NiMH batteries) any more. When the circuit was OK, its green LEDs lit up one at a time to show that the batteries have charged more. But now that the circuit is flawed, LEDs light up as you see in the video and at the same time successive beeps are heard.

                    Please help me fix this circuit.

                    (the datasheet of the IC: https://pdf.datasheet.live/28...
                    01-28-2025, 06:24 AM
                  • dicky96
                    Lynx RS4-2000 switch mode PSU does not start
                    by dicky96
                    Hi guys
                    This PSU is actually in an amplifier, but it is the PSU itself that has a problem

                    I have spent quite a lot of time trying to diagnose this and the more I get into it the more puzzled I become

                    It has a Standby, or Startup supply (15V) generated by a TOP245GN and this is working

                    The main SMPS is controlled by a SG3525A and it does not start up

                    According to the datasheet
                    https://pdf1.alldatasheet.com/datash...A/SG3525A.html

                    This SG3525A will shut down if pin 10 is high, or pin 9 or pin 8 are...
                    11-17-2021, 06:20 AM
                  • Tarot Superstars
                    Short Circuit tester
                    by Tarot Superstars
                    Hello.
                    I have seen a short circuit tester made with 3 * 9V batteries, a voltage limiter component and a resistor connected to the probes of a multimeter.
                    The theory is that the meter becomes sensitive enough to read very low resistances and the lowest resistance to ground on a circuit is likely to be a short circuit in that area.

                    Link
                    The Amazing $1 Short Finder Upgraded! Convert ... - YouTube
                    https://www.youtube.com/watch?v=0eixDdCpiO4

                    My multimeter isn't normally sensitive to very small resistance, but when I put a 1 mega ohm resistor...
                    09-25-2023, 09:11 AM
                  • Alimash
                    op amp circuit function?
                    by Alimash
                    Hi,
                    I am repairing a ups which doesn't turn on ,it has the following ICs:
                    SG3525 used to drive inverter mosfets.
                    couple of uc3483, one for the power supply and another to drive a big mosfet at the output stage(i think the technique is called boost)
                    A LM358 and TL074 for control mechanism and of course the uController.

                    The SG3525 is shutting down every time the ups is turned on.
                    I want your help to know the function of LM358 and TL074 in the system.
                    I reverse engineered the LM358 circuit and i think that one of the block(A) is used for battery level...
                    LM358 circuit
                    1 Photo
                    07-31-2025, 07:45 AM
                  • CoinCoin88
                    Garage door RX unit (Cardin S38C) does not short relay to send opening signal
                    by CoinCoin88
                    Hello everyone,

                    I'm turning to the Badcaps community to help me troubleshoot the radio Rx card from my (old) garage door opener. While I could just ditch that card and replace the whole system, I first would like to understand "why" it suddenly stopped working, because that's just how I am wired...!

                    Some basics: the receiver works on a 30.875 Mhz frequency. Yes, I'm aware this is not in use anymore in a looot of places. It does not use any rolling code, it's just a regular dip-switch code that you have to set up on both the receiver and transmitter. The receiver...
                    09-15-2025, 03:36 AM
                  • Loading...
                  • No more items.
                  Working...