Re: [time-nuts] Fluke monitor
Having essentially no experience in SMD work, what diodes did you use? Thanks, Joe -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of erniepe...@aol.com Sent: Friday, June 04, 2010 5:42 AM To: time-nuts@febo.com Subject: Re: [time-nuts] Fluke monitor Hi Gents, Just received a few hours ago my new Fluke monitor and just right now making the mods... I used 2SMD diode and the voltage on the CPU is 3,6 Volt. hopefully will work properly.. Will report later on any problem. Rgds Ernie. -Original Message- From: gandal...@aol.com To: time-nuts@febo.com Sent: Fri, Jun 4, 2010 11:57 am Subject: Re: [time-nuts] Fluke monitor In a message dated 04/06/2010 05:47:32 GMT Daylight Time, le...@wa5znu.org rites: fixed my fluke.l monitor. This evening I got mail today from Bob Mokia: The problem is too much volts on CPU (8051F330D). ust have diodes 1n4148 etc at D1 and D2. Drop cpu volts to 3.6volts. aximum volts from data sheet is 4.2 volts. D1, D2, and D3 are zero-ohm SMT resistors in series from the 5V egulator output. They are visible from the CPU board edge. Without emoving the CPU board from the display, I was able to remove D1 and ack a pair of 1N4148's in series from the D1 plus pad to D2, both right t the board edge. I left D2 and D3 in place. I made the leads as hort as possible, but still had to bend the parts up a bit to fit it in he case. As soon as I plugged it in, it worked. It's been on about 15 minutes ow with no problems. -- i Leigh ongratulations on getting your monitor fixed. hat's great news and very interesting, many thanks for sharing it. ine are still packed away but I'm getting closer to being up and running gain so will check them over when I can and adjust as necessary. arking the component positions D1, D2, D3 presumably implies that the esigner of the PCB allowed for this from the start so raises the question, hy wasn't it implemented as such? easurements I made following the initial confusion over supply equirements did confirm that the display module will still function at 3.6 olts but would have expected the contrast to require adjustment if the supply to hat had also been dropped so perhaps the regulator output splits before he diodes. hat might also explain also why the option to fit the diodes was given in he first place, instead of just using a lower output regulator. erhaps the design of the original iCruze processor board was rather lindly copied, with variation where necessary to accomodate the different ackage and/or pin out of the 8051, but otherwise left the same and without due consideration given to the voltage requirements of the replacement rocessor.? lso of concern is the fact that your unit, and it appears some others oo, did work as expected for quite a while before showing the symptoms you reviously described. hose symptoms then being consistent, at least without dropping the supply oltage, suggests the possibility of some form of irreversible change, so wonder if something in the processor itself, perhaps a protection device, ight have been permanently damaged? egards igel M8PZR __ ime-nuts mailing list -- time-nuts@febo.com o unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts nd follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Fluke monitor
In a message dated 05/06/2010 23:28:26 GMT Daylight Time, jlt...@att.net writes: Having essentially no experience in SMD work, what diodes did you use? Hi Joe There's enough room to fit standard wire ended 1N4148s, as per Didier's original circuit, if you bend the wires carefully so no ned to source SMD parts unless you really want to. regards Nigel GM8PZR ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Fluke monitor
On 05/06/2010, gandal...@aol.com gandal...@aol.com wrote: There's enough room to fit standard wire ended 1N4148s, as per Didier's original circuit, if you bend the wires carefully so no ned to source SMD parts unless you really want to. That said, if anyone (UK / Europe) wants them, I happen to have an insane number (100K) of 1N4148s in the appropriate MELF package. I'll happily stick a dozen in an envelope for anyone who wants them and post them out. Steve ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Fluke monitor
Thanks. Allied has them, SMD, $3.00 per 100. Should be a lifetime supply for me. And you're right, 100K is insane. And my wife thought I was a packrat. :) Thanks again. Joe -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Steve Wiseman Sent: Saturday, June 05, 2010 5:40 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Fluke monitor On 05/06/2010, gandal...@aol.com gandal...@aol.com wrote: There's enough room to fit standard wire ended 1N4148s, as per Didier's original circuit, if you bend the wires carefully so no ned to source SMD parts unless you really want to. That said, if anyone (UK / Europe) wants them, I happen to have an insane number (100K) of 1N4148s in the appropriate MELF package. I'll happily stick a dozen in an envelope for anyone who wants them and post them out. Steve ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Fluke monitor
In a message dated 04/06/2010 05:47:32 GMT Daylight Time, le...@wa5znu.org writes: fixed my fluke.l monitor. This evening I got mail today from Bob Mokia: The problem is too much volts on CPU (8051F330D). Must have diodes 1n4148 etc at D1 and D2. Drop cpu volts to 3.6volts. Maximum volts from data sheet is 4.2 volts. D1, D2, and D3 are zero-ohm SMT resistors in series from the 5V regulator output. They are visible from the CPU board edge. Without removing the CPU board from the display, I was able to remove D1 and tack a pair of 1N4148's in series from the D1 plus pad to D2, both right at the board edge. I left D2 and D3 in place. I made the leads as short as possible, but still had to bend the parts up a bit to fit it in the case. As soon as I plugged it in, it worked. It's been on about 15 minutes now with no problems. --- Hi Leigh Congratulations on getting your monitor fixed. That's great news and very interesting, many thanks for sharing it. Mine are still packed away but I'm getting closer to being up and running again so will check them over when I can and adjust as necessary. Marking the component positions D1, D2, D3 presumably implies that the designer of the PCB allowed for this from the start so raises the question, why wasn't it implemented as such? Measurements I made following the initial confusion over supply requirements did confirm that the display module will still function at 3.6 volts but I would have expected the contrast to require adjustment if the supply to that had also been dropped so perhaps the regulator output splits before the diodes. That might also explain also why the option to fit the diodes was given in the first place, instead of just using a lower output regulator. Perhaps the design of the original iCruze processor board was rather blindly copied, with variation where necessary to accomodate the different package and/or pin out of the 8051, but otherwise left the same and without due consideration given to the voltage requirements of the replacement processor.? Also of concern is the fact that your unit, and it appears some others too, did work as expected for quite a while before showing the symptoms you previously described. Those symptoms then being consistent, at least without dropping the supply voltage, suggests the possibility of some form of irreversible change, so I wonder if something in the processor itself, perhaps a protection device, might have been permanently damaged? regards Nigel GM8PZR ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Fluke monitor
Hi Gents, Just received a few hours ago my new Fluke monitor and just right now making the mods... I used 2SMD diode and the voltage on the CPU is 3,6 Volt. hopefully will work properly.. Will report later on any problem. Rgds Ernie. -Original Message- From: gandal...@aol.com To: time-nuts@febo.com Sent: Fri, Jun 4, 2010 11:57 am Subject: Re: [time-nuts] Fluke monitor In a message dated 04/06/2010 05:47:32 GMT Daylight Time, le...@wa5znu.org rites: fixed my fluke.l monitor. This evening I got mail today from Bob Mokia: The problem is too much volts on CPU (8051F330D). ust have diodes 1n4148 etc at D1 and D2. Drop cpu volts to 3.6volts. aximum volts from data sheet is 4.2 volts. D1, D2, and D3 are zero-ohm SMT resistors in series from the 5V egulator output. They are visible from the CPU board edge. Without emoving the CPU board from the display, I was able to remove D1 and ack a pair of 1N4148's in series from the D1 plus pad to D2, both right t the board edge. I left D2 and D3 in place. I made the leads as hort as possible, but still had to bend the parts up a bit to fit it in he case. As soon as I plugged it in, it worked. It's been on about 15 minutes ow with no problems. -- i Leigh ongratulations on getting your monitor fixed. hat's great news and very interesting, many thanks for sharing it. ine are still packed away but I'm getting closer to being up and running gain so will check them over when I can and adjust as necessary. arking the component positions D1, D2, D3 presumably implies that the esigner of the PCB allowed for this from the start so raises the question, hy wasn't it implemented as such? easurements I made following the initial confusion over supply equirements did confirm that the display module will still function at 3.6 olts but would have expected the contrast to require adjustment if the supply to hat had also been dropped so perhaps the regulator output splits before he diodes. hat might also explain also why the option to fit the diodes was given in he first place, instead of just using a lower output regulator. erhaps the design of the original iCruze processor board was rather lindly copied, with variation where necessary to accomodate the different ackage and/or pin out of the 8051, but otherwise left the same and without due consideration given to the voltage requirements of the replacement rocessor.? lso of concern is the fact that your unit, and it appears some others oo, did work as expected for quite a while before showing the symptoms you reviously described. hose symptoms then being consistent, at least without dropping the supply oltage, suggests the possibility of some form of irreversible change, so wonder if something in the processor itself, perhaps a protection device, ight have been permanently damaged? egards igel M8PZR __ ime-nuts mailing list -- time-nuts@febo.com o unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts nd follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Fluke monitor
I fixed my fluke.l monitor. This evening I got mail today from Bob Mokia: The problem is too much volts on CPU (8051F330D). Must have diodes 1n4148 etc at D1 and D2. Drop cpu volts to 3.6volts. Maximum volts from data sheet is 4.2 volts. D1, D2, and D3 are zero-ohm SMT resistors in series from the 5V regulator output. They are visible from the CPU board edge. Without removing the CPU board from the display, I was able to remove D1 and tack a pair of 1N4148's in series from the D1 plus pad to D2, both right at the board edge. I left D2 and D3 in place. I made the leads as short as possible, but still had to bend the parts up a bit to fit it in the case. As soon as I plugged it in, it worked. It's been on about 15 minutes now with no problems. Leigh/WA5ZNU ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Fluke monitor
In a message dated 17/05/2010 06:13:05 GMT Daylight Time, le...@wa5znu.org writes: You're right about the current. I just checked it with my DMM and got 45ma. My inline power meter must not be that it's not that accurate at the low end. The display works; the backlight works; the processor must be doing something since it prints a variety of messages. It's the RS232 that has flakey. The hardest thing at this point is to unsolder the 16-pin header. Bob suggests that a 12v regulator may have failed. -- That's encouraging re the current, I'm also inclined to the view that it's likely to be an RS232 issue but still wouldn't rule out a quality issue without careful checking. I'm not sure what Bob means when he suggests a 12v regulator may have died as there isn't one fitted to this unit. The only regulator is the surface mount 5v unit which, from the measured current, I would say is working correctly but that's easy enough to check anyway. Unsoldering such a header can be very difficult if you try to do it a pin at a time, especially on a plated through PCB. It is possible to clear one pin at a time with either a solder sucker or solder braid, or a combination of both. I've also succesfully removed connectors and IC sockets from double sided PCBs using a powered vacuum desoldering tool but it's generally less likely to cause damage if you can melt all the solder at once to separate the boards and then clean off the surplus after. There's a variety of ways to do this, from hot air guns to specially shaped iron tips, and as many opinions as to which might be the best method:-). I would prefer a shaped iron tip in this particular instance but they don't seem to be so widely available these days, at least not for the irons I use, so might also suggest flood filling along the pins with molten solder as another option. With this though you have to be very sure your iron has a big enough tip and that there's enough heat reserve in the system to ensure the whole lot doesn't solidify and leave you in a lot more mess than when you started. PCB damage to pads and through plating is again a risk with everything heated at once and practice on something non essential would be well advised. I still can't access my units right now and can't remember the exact physical setup but if the header pins are exposed and accessible between the two boards by far the best option is likely to be cutting them and sacrificing the header. That might seem drastic but headers are much easier to replace than circuit boards and all you need do then is remove each pin separately which, with care, greatly reduces the risk of damage. If there's a plastic moulding at one or other end of the header which still seems to be locking the pins together these are fairly easy to remove, softening with a nearby soldering iron should generally release any that seem well locked in place or a thin scalpel blade can be used to carefully cut through the plastic and separate the pins that way. Emphasis though on thin blade, thicker blades such as those found in a Stanley knife can act as a wedge and force the pins apart which again carries risk of damage when close to the PCB. regards Nigel GM8PZR ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Fluke monitor
You're right about the current. I just checked it with my DMM and got 45ma. My inline power meter must not be that it's not that accurate at the low end. The display works; the backlight works; the processor must be doing something since it prints a variety of messages. It's the RS232 that has flakey. The hardest thing at this point is to unsolder the 16-pin header. Bob suggests that a 12v regulator may have failed. Leigh/WA5ZNU In a message dated 12/05/2010 17:45:16 GMT Daylight Time, le...@wa5znu.org writes: The monitor is a recent model and has the regulator. I left it on overnight, in its original case and out in the open, hooked to a 13.5V supply. I had it on a ammeter the whole time, and it never draws more than 0.02A. The backlight is fine and the display works. -- Something doesn't seem right with that current consumption. Mine's not in use at the moment, as my test area is still stripped down, but when it was I measured a consistent 47mA once the regulator had a high enough supply to ensure it was regulating, in my case I was using 12 volts but the current is determined by the regulator output voltage so shouldn't vary much anyway. The display is what was fitted originally fitted to the iCruze module but the processor board has been changed so that Didier's Tbolt Monitor code can be used. The processor module circuit is pretty basic so I wouldn't have thought there was too much room for a design error. I'd be inclined to start by separating the processor board from the display and then reconnect using a temporary link of flexible wiring so as to be able to check if the processor circuitry is actually drawing current, then I'd probably continue by looking for quality issues, bad joints, solder bridges, etc. If that turned up nothing obvious then a more in depth examination of what the processor is doing would be my next step, in particular it would be interesting to know how it's handling the RS232 interfacing just in case it's a comms issue. Given that Didier's code is freely available, and the processor board schematic is easily traced, it shouldn't be too difficult as a last resort just to build a replacement. regards Nigel GMPZR ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Fluke monitor
On 05/06/2010 12:29 PM, Arthur Dent wrote: But now here is the finding. The monitor board has the 7805 SMD version and I was feeding from +12Volt and after a while the SMD voltage regulator overheated and started to drop the voltage and it was the reason to receive/display garbled msg.the display is built into the same box as the gpsdo. the temp of the gpsdo was around 45 Celsius, so inside the box the temp also was elevated so no wonder why the SMD voltage reg overheated Ernie, Glad to hear you were able to find the problem. Quite often you can use a can of spray coolant to identify thermal problems like this one. The regulator is rated 0.5A but the amount of power it was asked to dissipate caused the thermal shutdown. It was working just the way it was designed. One suggestion I would make is to epoxy a small heatsink onto the chip to make sure this doesn't happen again. The 75 ohm resistor you're using will probably take care of the problem permanently but even a small heatsink cut and formed from a soda can wouldn't hurt. -Arthur My fluke.l monitor stopped working today after one overnight session. LH is connected at the same time and is reporting good data from the tbolt. I currently think that it's perhaps a clock speed issue, not a voltage issue, because I'm getting 5V out of the regulator right now and it's not working. Here's how I got here: The monitor is a recent model and has the regulator. I left it on overnight, in its original case and out in the open, hooked to a 13.5V supply. I had it on a ammeter the whole time, and it never draws more than 0.02A. The backlight is fine and the display works. It says No Message and occasionally gives garbled displays of other data. Once it said No Message / PowerSupply Fail but not again. Turning it off for an hour didn't help. I tried it at a lower voltage (8V) and it works some, alternating between No Message and some data or otehr every few minutes, but the data doesn't appear to be accurate (claiming 2D/3D mode when it's not, including question marks in numeric fields, etc). With 12.2V-13.5V in, I get 4.99-5.01V from the square via on the left of the board to the 3 round vias next to it, yet I still get No message or garbled data. Leigh/WA5ZNU ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Fluke monitor
Hi Leigh: Is the wiring to the monitor exposed such that you can touch it? I think mine died because of static zap to the exposed wiring. http://www.prc68.com/I/ThunderBolt.shtml#iCruze Have Fun, Brooke Clarke http://www.PRC68.com Leigh L. Klotz, Jr WA5ZNU wrote: On 05/06/2010 12:29 PM, Arthur Dent wrote: But now here is the finding. The monitor board has the 7805 SMD version and I was feeding from +12Volt and after a while the SMD voltage regulator overheated and started to drop the voltage and it was the reason to receive/display garbled msg.the display is built into the same box as the gpsdo. the temp of the gpsdo was around 45 Celsius, so inside the box the temp also was elevated so no wonder why the SMD voltage reg overheated Ernie, Glad to hear you were able to find the problem. Quite often you can use a can of spray coolant to identify thermal problems like this one. The regulator is rated 0.5A but the amount of power it was asked to dissipate caused the thermal shutdown. It was working just the way it was designed. One suggestion I would make is to epoxy a small heatsink onto the chip to make sure this doesn't happen again. The 75 ohm resistor you're using will probably take care of the problem permanently but even a small heatsink cut and formed from a soda can wouldn't hurt. -Arthur My fluke.l monitor stopped working today after one overnight session. LH is connected at the same time and is reporting good data from the tbolt. I currently think that it's perhaps a clock speed issue, not a voltage issue, because I'm getting 5V out of the regulator right now and it's not working. Here's how I got here: The monitor is a recent model and has the regulator. I left it on overnight, in its original case and out in the open, hooked to a 13.5V supply. I had it on a ammeter the whole time, and it never draws more than 0.02A. The backlight is fine and the display works. It says No Message and occasionally gives garbled displays of other data. Once it said No Message / PowerSupply Fail but not again. Turning it off for an hour didn't help. I tried it at a lower voltage (8V) and it works some, alternating between No Message and some data or otehr every few minutes, but the data doesn't appear to be accurate (claiming 2D/3D mode when it's not, including question marks in numeric fields, etc). With 12.2V-13.5V in, I get 4.99-5.01V from the square via on the left of the board to the 3 round vias next to it, yet I still get No message or garbled data. Leigh/WA5ZNU ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Fluke monitor
My fluke.l monitor stopped working today ... Mine stopped yesterday The monitor is a recent model and has the regulator. So does mine and I run the board from a 9V regulator. The display is built into the same box as the gpsdo I left it on overnight, Mine has been on continuously for over a month The backlight is fine and the display works. and occasionally gives garbled displays of other data. alternating between ... some data or other every few minutes, but the data doesn't appear to be accurate...including question marks in numeric fields, Same thing here Other errors that I get : 2 lines of date time Only one line of date time on the display It has frozen displaying only one line of date time for several minutes Sometimes displays TSIP LED Monit Ocassionally only the back-light is on, nothing displayed This lasts for a couple minutes then resumes normal display. There seems to be a pattern developing. Is this an inherent problem with the processor board or with the software? All together, mine has been in operation about 3 months which would seem to rule out a software problem. The occasional display of TSIP LED Monit would indicate that the processor is being reset as this is normally seen at power-up. Maury W5UGQ ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Fluke monitor
In a message dated 12/05/2010 17:45:16 GMT Daylight Time, le...@wa5znu.org writes: The monitor is a recent model and has the regulator. I left it on overnight, in its original case and out in the open, hooked to a 13.5V supply. I had it on a ammeter the whole time, and it never draws more than 0.02A. The backlight is fine and the display works. -- Something doesn't seem right with that current consumption. Mine's not in use at the moment, as my test area is still stripped down, but when it was I measured a consistent 47mA once the regulator had a high enough supply to ensure it was regulating, in my case I was using 12 volts but the current is determined by the regulator output voltage so shouldn't vary much anyway. The display is what was fitted originally fitted to the iCruze module but the processor board has been changed so that Didier's Tbolt Monitor code can be used. The processor module circuit is pretty basic so I wouldn't have thought there was too much room for a design error. I'd be inclined to start by separating the processor board from the display and then reconnect using a temporary link of flexible wiring so as to be able to check if the processor circuitry is actually drawing current, then I'd probably continue by looking for quality issues, bad joints, solder bridges, etc. If that turned up nothing obvious then a more in depth examination of what the processor is doing would be my next step, in particular it would be interesting to know how it's handling the RS232 interfacing just in case it's a comms issue. Given that Didier's code is freely available, and the processor board schematic is easily traced, it shouldn't be too difficult as a last resort just to build a replacement. regards Nigel GMPZR ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Fluke monitor
Must be the Y2.01K bug... Sorry about the problems being reported recently. While I have no association with Bob of Fluke.l, he is using my design and he was kind enough to send me one demo model, which I have yet to turn on. In general, if the processor is not fried, there is very little that can go wrong: 1) check that the serial data getting to the processor is clean. Noise on these lines in unforgiving since the protocol has no error detection or correction. In my design, I use a single bipolar transistor to convert the RS-232 to TTL. Not the best way to do it if noise is a concern. It works fine for me, but YMMV 2) check the interface to the LCD. There are 7 wires in addition to ground and +5V. An intermittent connection with cause trouble. 3) check the supply voltage. Most regulators should work fine with 7V input, more voltage only makes more heat. With an LCD display, the current consumption should be low (20 to 50mA) and relatively constant, mostly a function of the backlight. With a VFD display, the consumption is quite a bit higher (several hundred mA) and fluctuates depending on how many segments (pixels) are turned on. Didier msproul mspr...@suddenlink.net wrote: My fluke.l monitor stopped working today ... Mine stopped yesterday The monitor is a recent model and has the regulator. So does mine and I run the board from a 9V regulator. The display is built into the same box as the gpsdo I left it on overnight, Mine has been on continuously for over a month The backlight is fine and the display works. and occasionally gives garbled displays of other data. alternating between ... some data or other every few minutes, but the data doesn't appear to be accurate...including question marks in numeric fields, Same thing here Other errors that I get : 2 lines of date time Only one line of date time on the display It has frozen displaying only one line of date time for several minutes Sometimes displays TSIP LED Monit Ocassionally only the back-light is on, nothing displayed This lasts for a couple minutes then resumes normal display. There seems to be a pattern developing. Is this an inherent problem with the processor board or with the software? All together, mine has been in operation about 3 months which would seem to rule out a software problem. The occasional display of TSIP LED Monit would indicate that the processor is being reset as this is normally seen at power-up. Maury W5UGQ ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Fluke monitor
Hi Art, Thanks for the info, but until now I had no time to chk the circuit But now here is the finding. The monitor board has the 7805 SMD version and I was feeding from +12Volt and after a while the SMD voltage regulator overheated and started to drop the voltage and it was the reason to receive/display garbled msg.the display is built into the same box as the gpsdo. the temp of the gpsdo was around 45 Celsius, so inside the box the temp also was elevated so no wonder why the SMD voltage reg overheated. Now used a serial 75 Ohm resistor to drop the +12 voltage down and no more overheating. and ever since it is working fine..The display draws about 50mA. Thanks to everybody to pointing out the possible problem and also found additional info about the volt reg IC on Fluke home page. Rgds Ernie. -Original Message- From: Arthur Dent golgarfrinc...@yahoo.com To: time-nuts@febo.com Sent: Wed, May 5, 2010 7:13 pm Subject: [time-nuts] Fluke monitor I mean when I remove the power from the monitor and let it cool down the fter about 1Hrs it starting to work again normal, the later on displaying arbled msg.. like something is overheating?? --- luke.L has sold 2 versions of the monitor. one works on 5VDC while the ther has a 78M05 regulator and requires approximately 9 to 12 volts to perate. It would help to know which of these you have and what you are sing for a power supply. If you bought your display about 5 months ago hen it is probably one designed for +5V. The display this unit uses is a Y-2002A-803. The pinout for the display connector can be found at: ttp://www.ciahk.net/upload/docs/HY-2002A.pdf heck for the +5 on the correct pin of the display. if you have the correct oltage the problem could well be a parts failure on either the display or the aughter board. Arthur __ ime-nuts mailing list -- time-nuts@febo.com o unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts nd follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] Fluke monitor
But now here is the finding. The monitor board has the 7805 SMD version and I was feeding from +12Volt and after a while the SMD voltage regulator overheated and started to drop the voltage and it was the reason to receive/display garbled msg.the display is built into the same box as the gpsdo. the temp of the gpsdo was around 45 Celsius, so inside the box the temp also was elevated so no wonder why the SMD voltage reg overheated Ernie, Glad to hear you were able to find the problem. Quite often you can use a can of spray coolant to identify thermal problems like this one. The regulator is rated 0.5A but the amount of power it was asked to dissipate caused the thermal shutdown. It was working just the way it was designed. One suggestion I would make is to epoxy a small heatsink onto the chip to make sure this doesn't happen again. The 75 ohm resistor you're using will probably take care of the problem permanently but even a small heatsink cut and formed from a soda can wouldn't hurt. -Arthur ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] Fluke monitor
Hi, after about 4-5 month I got the trouble with the LCD fluke monitor It was displaying funny nbrs and characters. and sometime it was stock in one position.../ in one msg / and displaying incorrect time/date... Trimble was about 45 Celsius and the Monitor was displaying all kind of funny msg and characters.. Swishing of ONLY the display and after about 1 hrs it was working fine but after about 30 min it started again to display funny characters and msg.. Per PC software there is no any indication that the unit / TRIMBLE / was not working properly just the display unit... Tried several times and always got the same results Anybody had similar problem Any suggestion to resolve this problem? Many thanks in advance for all help/ troubleshooting.. Rgds Ernie. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Fluke monitor
Considering that there are two main components in the display, it could be either the microcontroller, the LCD display, or the cabling between the two. I am not sure what you mean by swishing, but if shaking it fixes the problem, even momentarily, it may be as simple as a cold solder joint. It could also be temperature related. Didier KO4BB Sent from my BlackBerry Wireless thingy while I do other things... -Original Message- From: erniepe...@aol.com Date: Wed, 05 May 2010 08:36:18 To: time-nuts@febo.com Subject: [time-nuts] Fluke monitor Hi, after about 4-5 month I got the trouble with the LCD fluke monitor It was displaying funny nbrs and characters. and sometime it was stock in one position.../ in one msg / and displaying incorrect time/date... Trimble was about 45 Celsius and the Monitor was displaying all kind of funny msg and characters.. Swishing of ONLY the display and after about 1 hrs it was working fine but after about 30 min it started again to display funny characters and msg.. Per PC software there is no any indication that the unit / TRIMBLE / was not working properly just the display unit... Tried several times and always got the same results Anybody had similar problem Any suggestion to resolve this problem? Many thanks in advance for all help/ troubleshooting.. Rgds Ernie. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Fluke monitor
Hi Didier, I mean when I remove the power from the monitor and let it cool down the after about 1Hrs it starting to work again normal, the later on displaying garbled msg.. like something is overheating?? Rgds Ernie. -Original Message- From: Didier Juges did...@cox.net To: Time-Nuts time-nuts@febo.com Sent: Wed, May 5, 2010 3:44 pm Subject: Re: [time-nuts] Fluke monitor Considering that there are two main components in the display, it could be ither the microcontroller, the LCD display, or the cabling between the two. I am not sure what you mean by swishing, but if shaking it fixes the problem, ven momentarily, it may be as simple as a cold solder joint. It could also be temperature related. Didier KO4BB Sent from my BlackBerry Wireless thingy while I do ther things... -Original Message- rom: erniepe...@aol.com ate: Wed, 05 May 2010 08:36:18 o: time-nuts@febo.com ubject: [time-nuts] Fluke monitor i, after about 4-5 month I got the trouble with the LCD fluke monitor It as displaying funny nbrs and characters. and sometime it was stock in one osition.../ in one msg / and displaying incorrect time/date... rimble was about 45 Celsius and the Monitor was displaying all kind of funny sg and characters.. Swishing of ONLY the display and after about 1 hrs it was working fine but after bout 30 min it started again to display funny characters and msg.. Per PC software there is no any indication that the unit / TRIMBLE / was not orking properly just the display unit... ried several times and always got the same results Anybody had similar problem ny suggestion to resolve this problem? Many thanks in advance for all help/ troubleshooting.. Rgds Ernie. __ ime-nuts mailing list -- time-nuts@febo.com o unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts nd follow the instructions there. __ ime-nuts mailing list -- time-nuts@febo.com o unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts nd follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Fluke monitor
Did you try a different power supply? Original-Nachricht Datum: Wed, 05 May 2010 11:12:18 -0400 Von: erniepe...@aol.com An: did...@cox.net, time-nuts@febo.com Betreff: Re: [time-nuts] Fluke monitor Hi Didier, I mean when I remove the power from the monitor and let it cool down the after about 1Hrs it starting to work again normal, the later on displaying garbled msg.. like something is overheating?? Rgds Ernie. -Original Message- From: Didier Juges did...@cox.net To: Time-Nuts time-nuts@febo.com Sent: Wed, May 5, 2010 3:44 pm Subject: Re: [time-nuts] Fluke monitor Considering that there are two main components in the display, it could be ither the microcontroller, the LCD display, or the cabling between the two. I am not sure what you mean by swishing, but if shaking it fixes the problem, ven momentarily, it may be as simple as a cold solder joint. It could also be temperature related. Didier KO4BB Sent from my BlackBerry Wireless thingy while I do ther things... -Original Message- rom: erniepe...@aol.com ate: Wed, 05 May 2010 08:36:18 o: time-nuts@febo.com ubject: [time-nuts] Fluke monitor i, after about 4-5 month I got the trouble with the LCD fluke monitor It as displaying funny nbrs and characters. and sometime it was stock in one osition.../ in one msg / and displaying incorrect time/date... rimble was about 45 Celsius and the Monitor was displaying all kind of funny sg and characters.. Swishing of ONLY the display and after about 1 hrs it was working fine but after bout 30 min it started again to display funny characters and msg.. Per PC software there is no any indication that the unit / TRIMBLE / was not orking properly just the display unit... ried several times and always got the same results Anybody had similar problem ny suggestion to resolve this problem? Many thanks in advance for all help/ troubleshooting.. Rgds Ernie. __ ime-nuts mailing list -- time-nuts@febo.com o unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts nd follow the instructions there. __ ime-nuts mailing list -- time-nuts@febo.com o unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts nd follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. -- Feel free - 10 GB Mailbox, 100 FreeSMS/Monat ... Jetzt GMX TopMail testen: http://www.gmx.net/de/go/topmail ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] Fluke monitor
I mean when I remove the power from the monitor and let it cool down the after about 1Hrs it starting to work again normal, the later on displaying garbled msg.. like something is overheating?? Fluke.L has sold 2 versions of the monitor. one works on 5VDC while the other has a 78M05 regulator and requires approximately 9 to 12 volts to operate. It would help to know which of these you have and what you are using for a power supply. If you bought your display about 5 months ago then it is probably one designed for +5V. The display this unit uses is a HY-2002A-803. The pinout for the display connector can be found at: http://www.ciahk.net/upload/docs/HY-2002A.pdf Check for the +5 on the correct pin of the display. if you have the correct voltage the problem could well be a parts failure on either the display or the daughter board. -Arthur ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
