[Asmordo]

I'm actually looking for any diagram or such where I can see what part is in component position TH1 and possibly TR2 on this PCB A16B-2600-0040/06B, or anything that may help.
The three capacitors on this board: 35V 150uF, and 10V 479uF leaked electrolyte and shorted the board when it was powered on. TH1 smoked, and I assume it's dead. But there's no markings on it that I can discern. Same with TR2.
If someone happen to have this board, I would be very grateful if you could check and see what part is used. (well I somehow suspect that they deliberately erased the text on the components, even if I have no idea if that's really the case. It may just be the electrolyte that erased the text!?)

Attachment 264918


Other than the interface board, the P-system seems to be working though.

Thank you for your time.

[Asmordo]

Ok, It's actually not only the TH1, TR1, capacitors that's dead, but I'll clear that up later, and those components still have the text on them, so it's not hard to find a replacement if I need it.

[ifixcnc]

What control is this board from?

[fordav11]

its a Fanuc System P Model H, not a control.
Its kind of like the Fanuc System P Model G yellow box but its in a sexy black PC-looking box and more up to date than the Model G. Have only seen 1 pic on google but I assume it would be for FAPT? More pics and info on what it is for would be nice if you could supply some :-)

[Asmordo]

Hey! Thank you for shown interest.
Sorry for the long delay in my posting. To busy at work, Influenza and such things...
Well, the reason I'm asking is that I don't know much about it. I think it's for programming FAPT LADDER or some such- just like fordav11 says, but it's been out of action for so long that not many seem to know, and there's no manual or anything. If someone happen to have the manual or any kind of information I would be happy.
Since the monitor out is broken I can't really say anything about what it does.

[fordav11]

do you have software/floppies for it? does it have an internal hard drive?
assuming it's for FAPT, it will be exactly like the FAPT available on a Fanuc CNC control except you can sit in an air-conditioned office and play with it instead of sweating like a dog out in the workshop using the FAPT on the machine.
a pic of the inside of the box would be nice.

[Asmordo]

Well, there's an internal hard-drive in the unit, so I assume it uses some software on-board, and there were no floppy's or manuals with the unit, even if it has a floppy driver.
The units model number is: A08B-0051-B001
Inside you can see the following parts: A20B-2900-0060/06B,A16B-2600-0040/06B (CRT interface unit broken), fan unit A08B-0051-C900,A20B-2900-0030/09B, Power unit A16B-1212-0521-01, A16B-2200-0127, A16B-2600-002C/03A, A16B-2200-051, A16B-1212-0510/02A, A16B-2600-002C/03A, A16B-2200-0501/0
I removed the CRT monitor out PCB (disconnected it) and then the unit turns on (I assume normally without any errors), so I think it's not broken other than that part. Hard to confirm without a manual or monitor though...
Air-conditioned - yes, I would assume it's something like that, as it's very nice with only some small scratches and no dust at all. No cheap item, so I would not want to break it any more than it was though. I guess I would have to be careful.
Since I know how people like pictures in posts (I know I do in any case), I'm putting up some.

Attachment 267796
Attachment 267798
Attachment 267800
Attachment 267802

[Asmordo]

Ok, I did find this old Ebay listing from Germany a while back. Very similar to my unit, except it ends with a 2 instead of a 1. But since I know very little German, I have no Idea is it mentions anything usefull about the item or not. Anyone?! ;-)

Fanuc A08B 0051 B002 Fanucp System Model H | eBay

[fordav11]

yes! there's info. Translating... it says to fix the CRT board, replace the transistor at location TR2 ;-)

seriously, it's ebay....there's no info. It says it's 100% functional, thats all.

thanks for the pics.
going on appearance, it seems to be based on Fanuc 12 or 15A or something similar.
but those PCBs are definitely custom to that unit. none of them are used in any Fanuc controller.

that type of thing needs to be owned and in the hands of someone skilled with electronic repairs to keep it working otherwise when it dies it's game over.

[Asmordo]

Haha, that's funny!
I guess I to could have gotten a bad translation from google translate, but I guess I was hoping for something more accurate. True that they usually don't mention much on Ebay, but I was hoping for one of those rare cases where they actually write about the item they sell.

No problem.
Thank you as well.

[memoryman]

Tennesee Industrial FANUC World.com : Tennessee Industrial Electronics, Inc. says that they have a complete unit for sale. You can also contact Pelican Industrial Pelican Industrial.
These places don't list their complete inventory on line.

[fordav11]

if its only that CRT board that is the problem just replace everything on the board. its a fairly simple board. the entire set of parts wouldn't cost more than $50

[Asmordo]

Since the components have no text or numbers (some of them), I asked for a diagram or anything that might help...
Thanks though. And It's most likely the CRT board, but I have not ruled out everything else without a doubt though. I would want a diagram or such to be sure. Guess no one has such old documents lying around.

[memoryman]

Highly unlikely. Also, these companies don't want to share prints. I have a system P/G, much older.
One possibility is to assume that there are identical components on the board and use their part identification.

[fordav11]

yeah no System P schematics available :-(

I have 2 System P Model G's, one mono and one color, both working (after I did some board and screen repairs) :-D

one thought, the CRT board may just be converting the video signal from the Fanuc video board A16B-2200-0510 to a sync level suitable for the screen you are using (I assume LCD?)
the video signal is just RGB, Sync and Ground (5 wires). Sync coming out of the video board is most likely 15kHz or 24kHz which means the CRT board has to do some conversion to VGA 31.5kHz for the LCD (LCD needs VGA 31.5k signal). You could try taking the RGBSG signal from the video board and using a frequency counter or logic probe find the correct wires and just hook them up to a cheap $25 sync converter board found on ebay. if you are lucky they might even be colored red, green, blue, black(ground) and yellow or white or grey(sync).

either way with a logic probe or frequency counter (or oscilloscope) you can see if the box is working without the screen or if you have a more serious issue.

[sansgp]

Hi, my profession is to repair electronic PCBs on CNCs, Servo Drives etc. Based on the information seen here, I think the TH1 could be a Crowbar protection for the 5V ? (could be a thyristor). Check the incoming power supply voltage. There are many test pins on the PCB, such as CH1 & CH3=GND, CH2=5V. What voltage comes on CH4? (could that be incoming 24V?) If it is so, the C12 is the filter cap for the incoming supply and the C1, C2 are for the 5V o/p. Also, remember to check the Fuse, F1 (just below TH1).

It is not difficult to trace the circuits between C1/C2 and the C12. If you did that, you can get better idea of how the circuit works and easily identify the faulty area to repair. Once you get the circuit idea, 'unknown' parts will not be 'hazy' anymore. you can substitute them with your choice of components. Good luck!