[kayleesdad]

I am having a problem with control power not coming on a Monarch Metalist 1A. All fuses check out good. It has Fanuc Series 15-T controls. I have verified power going to the input unit and it is not alarming. The operator says the machine was running then just stopped giving him a watchdog alarm (unfortunately he doesn't recall which one it was). He cycled power to the machine and we have not been able to get the operator panel up since. I have verified power to the monitor, I have verified that the on and off buttons work and every fuse in the panel is good. The "Operators Panel Connection Unit" is a Fanuc A16-1212-030 1/07A. It has a Fanuc A20B-1003-063 power supply board attached to it. I have verified 24 vdc going into the Fanuc A20B-1003-063 POWER SUPPLY BOARD, The two test points test out OK, 5 vdc is there as is 24 vdc. I also checked the A16-1212-030 1/07A board and it has the correct voltages as well. The on and off buttons at the control panel turn the Fanuc series 15-T controls on and off but the monitor or control lights never come on. I have verified power going to the input unit and it is not alarming. This has to be something simple but I seem to be missing it here. Wierd, Any ideas?

[Al_The_Man]

Check that the green LED is on on the input unit, this is a small unit with a couple of relays on it. Also check that the red LED is off.
I have emailed you if you need PDF information.
I see you have already done the checks, sorry.
If the CRT does not power up, check the status of LED's on the Base0 board, there should be a square block of 4 leds.
Al.

[kayleesdad]

Thanks, the green PIL LED is on and the red ALM LED is staying off. I can get the red ALM LED to come on when I disconnect CP11 plug, which makes me think it is working as it should because it notices the loss of voltage. Don't apologize, fire away with any suggestions, this has to be something simple that I am over looking.

[Al_The_Man]

I edited my first post to mention the manual says to check all LED's blocks on each of the main PCB's if you power up and the screen stays blank.
Al.

[kayleesdad]

The BASE 0 red LEDS 0 and 1 are on, 2 and 3 are off. The BASE 0 Green LEDS 0,3,1 are on, 2 is off. My manual doesn't show this condition. Would it be the same as the BASE 1 LED displays? This state on a BASE 1 PCB indicates that a error has occured within the BASE 1 PCB, D RAM PARITY (When the BOC is accessing).
BASE 1 green LEDS- 0,1,2 are on, 3 is off. Red LEDS 0 is on, the rest off
BASE 2- red LEDS 0,1 are on, 2,3 are off, all green LEDS are on.

[Al_The_Man]

I looks like possibly 'A parity Alarm has been generated in the BASE1 Ram' This could be caused by a defective IC in the board, I believe that the BASE1 is the board that runs the machine ladder logic, there is sometimes a PMC ROM board plugged into this and is downloaded into RAM at power-up time. I would try and get a call into the Fanuc help line and see if they can confirm this. I know if you don't buy their service they can take a while to get back to you.
Al.

[kayleesdad]

Thanks Al, will do.

[kayleesdad]

I've contacted GE Fanuc and am waiting on a response. The BASE1 board does have a PCM Cassette plugged in.

[kayleesdad]

The hydraulics do not turn on now in addition to the original problem I had. The on button at the control panel still turns on the Fanuc controls in the main cabinet. The LEDS on the boards have changed now too. The BASE0 red LEDS 0 is off and 1 is on, green LEDS 0,3,1 are on, 2 is off . The BASE1 Green LEDS are all on, all red LEDS are off. The BASE2 boards red LED 1 is on, the rest off, all green LEDS are on.
Any help with this would be much appreciated, I am lost. I have contacted GE-Fanuc but our company does not have any type of service agreement with them so they take forever to respond.

[Al_The_Man]

According to my 15 manuals I cannot see that combination, are you sure you are indicating the LED's right 0 is top left and they go anti-clockwise with 3 being top right.
I use a Fanuc specialist outfit here in Canada which are really good, they have spares as well, they have opened a US office in N.Y. I know that is a ways from you but if you get stuck, they may be worth a try, North American Industrial US 716-297-2822. I don't know if the US guys are as knowledgable as the ones in head office in Mississauga Ont 905-565-6165.
In the mean time maybe confirm the LED's.
I have found usually this type of fault is on board memory related.
Al.

[kayleesdad]

My manual doesn't cover that one either. I am sure I am listing it correctly. Our phones are still down from the Hurricane, do they have an email address? As always thanks for the feedback Al.

[kayleesdad]

GE Fanuc responded and have identified the BASE1 board as to being the problem. The LEDs point to a bad Base 1 board.
The ladder is not running because the control never finished the startup process, or because it went into an system alarm state.
I am ordering a new BASE1 board and will post my results.

[kayleesdad]

The problem was in fact the BASE1 board. I replaced it and the machine is back up. Thanks for the feedback. FYI, it definitely pays to shop around, there was a $2100 different between low and high price quotes!
(flame2)