Raymarine RC530 - funky power button - electronics repair / circuit diagram

Yngmar

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My cockpit plotter is an ageing RC530. When fed with DC power, it stays off until switched on by the red power button in the lower left corner. This button works fine for switching it on. So far so good!

But as soon as the plotter is switched on, that same red power button ceases to function. It simply does not register as pressed. So I can't switch the plotter off with it. This would not be tragic, as I can switch the plotter off on the DC panel. In fact a PO seems to have worked around the problem by wiring the plotter to a separate switch on the panel, likely as result of this malfunction. However, the same red power button is also used when remote controlling the RL70 radar receiver (mounted below at the nav station) via HSB - in which case the button is of crucial importance, as it toggles the Radar between transmit and standby. Which of course also doesn't work, because the button doesn't register. As it works for switching it on, it's not a simple mechanical fault of the button.

Now, because the button is used both for switching the device on initially, and as a software button later, it must have (at least) two different circuits connected to it, one of which clearly stopped working. I'd love to fix this so I can use the radar without climbing up and down the companionway, especially in situations where radar is actually useful. I haven't cracked the plotter open yet, so I don't know if it's something obvious.

The question is, has someone else had this problem before, and how did you get it sorted? And does anyone have circuit diagrams for the RC530? I know there are a lot of lovely leaked service manuals and circuit diagrams for that generation of Raymarine kit around in a big .zip bundle, but unfortunately the RC530 was not amongst them. Are they available somewhere?

Obviously I'd loathe to send it off to Raymarine and pay a silly sum for a small soldering job I could easily do myself. And no, I don't want to buy a whole new plotter (and radar) at this time.

rc530.jpg
 
It is most likely to be poor contact on the switch. Enough to turn on the power circuit as these are often very sensitive, but not enough to register as a logic pulse.

Hmm, interesting theory. As an experienced computer scientist, I have of course already tried the proven method of mashing the 'ell out of the button. Alas, it didn't register once. But I'll be sure to investigate this, as it would be a wonderfully easy fix! :)
 
Following my recent experience with Raymarine, you could do worse than ask them.

I spoke to John in the service department who was extremely helpful and did not speak down to me.

My recent thread on an E80 repair you should find illuminating ("Fixed price repair - a warning").

If you remove the front cover and the cover behind that, the rubber button panel should lift up revealing the push switches.

If that is the problem, I have a spare you are welcome to (again,- see my thread!).
 
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I had one of these units. Gave Vgood service. The PWR button is a momentary contact sw which gets processed by a circuit in the CPU board then causes a relay to operate to provide power to the system. The relay is held latched by the cct and the PWR button is monitored for other activity such as activating the Radar Tx or switching off the RC530 plotter. It seems to me the problem is in the pwr sw processing circuit. It can't read the Pwr sw closure after the power on relay has latched. However, I don't have the schematic so can't offer a component diagnosis.
I doubt that there is any problem with the actual Pwr button.

I have seen an ebay offer of Raymarine service manuals - http://www.ebay.com.au/itm/162033702935?_trksid=p2055119.m1438.l2649&ssPageName=STRK:MEBIDX:IT

Down the bottom of the list is the Radar section - I expect this manual would be appropriate "Raytheon Pathfinder - Part 6 - 7inch and 10inch Color LCD HSB Display Units.pdf" but I can't be sure.

Sadly, unless you or someone you know is capable of component level fault-finding/repair on pcb's with surface mount devices, you may be better to just look for a replacement on ebay. They go for about A$300-500 down here but you have to be patient to see one pop up.
 
I have now located the service manual - turns out I had it all along, I was just looking in the wrong place. It was filed under Radar instead of MFD, even though it's not a radar (the RC530 just remote controls the RL70 Radar via HSB2, but all of it is filed under the Pathfinder Radar series). Thanks for the offers of sharing manuals.

Have removed the chartplotter from the binnacle today and splayed it open. It looked like it has been opened before, probably when Raymarine fitted the HSB2 upgrade. The button was mechanically fine and I've followed the signal from the keypad to the CPU board and down to the PSU board, where it switches the latching relay on. The other thing it is meant to do is send a signal to the ARM 7500 CPU via a filter circuit. Unfortunately there's only a block diagram, but no circuit diagram of the CPU board, and the board is a multi-layered PCB, so tracing it was difficult. I poked around a fair bit and couldn't find any signal going to the CPU when pushing the power button, so I resoldered the keypad connector and the PCB vias that I thought would be the ones.

cprepair1.jpg


Voila, after a temporary reassembly (the PCB is fairly accessibly with the LCD flipped up and the shielding plate removed), the power button resulted in a beep and I can now switch off the chartplotter with it. Success!

I also cleaned up the buttons and front panel while I had it open. The glass cover over the LCD fell right out when I took it apart and the glue and sealant there had gone long ago, so I scraped that off and gooped some silicone in - will have to wait until tomorrow for that to cure.

Thanks Graham for the offer, but I don't think the E80 fits the hole in my binnacle where the RC530 was.

By visual inspection I've also found a fault in the CCFL inverter board (broken inductor) which I've repaired - now the display is much brighter again, hooray for that.

So all is well again, I can reclaim a precious switch on my DC panel and control my radar from the binnacle. Of course now that I had it out is also the perfect time to varnish the piece of teak it was mounted in, so that was another job done that's turned into three more :P

Fun fact (for nerds), HSB/HSB2 is actually ARCnet.

cprepair2.jpg
 
I have now located the service manual - turns out I had it all along, I was just looking in the wrong place. It was filed under Radar instead of MFD, even though it's not a radar (the RC530 just remote controls the RL70 Radar via HSB2, but all of it is filed under the Pathfinder Radar series). Thanks for the offers of sharing manuals.

Have removed the chartplotter from the binnacle today and splayed it open. It looked like it has been opened before, probably when Raymarine fitted the HSB2 upgrade. The button was mechanically fine and I've followed the signal from the keypad to the CPU board and down to the PSU board, where it switches the latching relay on. The other thing it is meant to do is send a signal to the ARM 7500 CPU via a filter circuit. Unfortunately there's only a block diagram, but no circuit diagram of the CPU board, and the board is a multi-layered PCB, so tracing it was difficult. I poked around a fair bit and couldn't find any signal going to the CPU when pushing the power button, so I resoldered the keypad connector and the PCB vias that I thought would be the ones.

cprepair1.jpg


Voila, after a temporary reassembly (the PCB is fairly accessibly with the LCD flipped up and the shielding plate removed), the power button resulted in a beep and I can now switch off the chartplotter with it. Success!

I also cleaned up the buttons and front panel while I had it open. The glass cover over the LCD fell right out when I took it apart and the glue and sealant there had gone long ago, so I scraped that off and gooped some silicone in - will have to wait until tomorrow for that to cure.

Thanks Graham for the offer, but I don't think the E80 fits the hole in my binnacle where the RC530 was.

By visual inspection I've also found a fault in the CCFL inverter board (broken inductor) which I've repaired - now the display is much brighter again, hooray for that.

So all is well again, I can reclaim a precious switch on my DC panel and control my radar from the binnacle. Of course now that I had it out is also the perfect time to varnish the piece of teak it was mounted in, so that was another job done that's turned into three more :P

Fun fact (for nerds), HSB/HSB2 is actually ARCnet.

cprepair2.jpg
How deliciously satisfying!
Lovely feeling to sort something like that!
Stu
PS I bet David Pugh at PBO would love to print a step by step with lots of pix!
 
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How deliciously satisfying!
Lovely feeling to sort something like that!

Aye :triumphant:


PS I bet David Pugh at PBO would love to print a step by step with lots of pix!

Ah, I doubt there's enough interest in that, with it being a rather random fault on a rather ancient piece of electronics (this one was made in November 2000 according to the marks inside).
 
Switches and connectors are usually the problem, anywhere that moist air can attack a contact area.

You may have fixed it just by disconnecting the above.

This isn't my first rodeo, I did of course try those easy tricks first. Having bought a used and slightly neglected boat, I'm well familiar with failed connections - the Eberspächer was the worst. Unfortunately it wasn't quite as simple as that! :)
 
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