IDX camera power supply turns off after a while

[zx81]

IDX camera power supply turns off after a while when warmed up. But will turn on again quite quickly when power is cycled.

Any help on what to do to diagnose this fault would be very much appreciated.

[redwire]

Re: IDX camera power supply turns off after a while

A lot of the board's soldering (to through-hole parts) looks like fractured joints.
The DC output connect has a cracked GND pin, and another is burning the plastic - resolder all those 4 pins and check the connector.
Pins by R54, bridge rectifier etc. all look in need of resoldering.

[R_J]

Re: IDX camera power supply turns off after a while

Your problem is with a burnt contact in the plug, Red wire. Fix that and I bet it works fine.
I would just remove the wire from the plug and solder it direct to the +V hole next to the plug
That connection is getting hot and blackened the plug. It will also be corroded so would be cutting out

[zx81]

Re: IDX camera power supply turns off after a while

redwire and R_J thank you for taking the time to look at the pics and your replies. I will take a look at everything you guys have suggested and will update when done.

Thank you guys.

[R_J]

Re: IDX camera power supply turns off after a while

This would be one way to fix the bad red wire connection, you could remove the plug completely and solder the two black grounds and the red positive directly to the board
Once the plug gets hot like that, it takes the spring tension out of the metal contact and the connection gets worse.

[PeteS in CA]

Re: IDX camera power supply turns off after a while

If possible, replace both the harness connector (including contacts), and the PWA's connector, Chances are that the contacts on both connectors have been damaged. Or hard-wire the harness.

One of two things probably happened. 1. The crimp in the harness red wire contact was poor and gradually broke down due to increasing heat. 2. The service loop of the harness in so tight that it mechanically stressed the contact between the socket and pin, resulting in a gradual break down due to heat.

The latter, mechanical stress, can also deform low current signal contacts and result in intermittent contact (e.g. the PSON* or PG wires in a 20- or 24-pin ATX connector).

[zx81]

Re: IDX camera power supply turns off after a while

Update.

I have removed the connector and soldered directly to the board. Will monitor the power supply over the next few days and report back.

Thanks to all of you for your fantastic advice and guidance.

zx81

[zx81]

Re: IDX camera power supply turns off after a while

I have tested the power supply for a couple of days now and am happy to report that it is running perfectly

Thanks once again to all of you for your comments and suggestions.

zx81.

[frica]

Re: IDX camera power supply turns off after a while

+1