Search results

I trimmed the ribbon cable that runs from the motherboard to the LCD panel inside the CIM. There are several CIM designs though (I've personally seen 3 different styles, but there are probably more). Only one of the three types I've dealt with uses the cable I'm referring to, the others use...

The CIM works for the 50/60hz and 400hz models, so I think the switch tells the CIM how to display the frequency correctly on the screen. I know there is also at least one more switch on one of the control modules to switch between 50/60 and 400hz. I believe it is a little dip switch on the...

My guess is the AVR400 is for the 815B and 816B 400Hz units, but that's just a guess. Guyfang can probably tell us for sure.

Tinstar, Thanks, that's the plan eventually. I appreciate the warning though. I obviously need to finish it up and validate it before seeking approval.

Those are good questions that I've been trying to find the answers to as well. I live in Utah, and so far it looks like I won't have to do anything, but I haven't gotten a definitive answer. The trailer brake laws here basically say the truck and trailer need to have a certain level of braking...

Red, I haven't kept very close track of the cumulative cost of the parts. I'd guess around $500. The E/P regulator is the single most expensive part. The one I am using is a new, old stock part I found cheap on eBay. It is actually discontinued by the manufacturer, but the updated version of...

So, I've seen a lot of threads involving trailer brakes on military trailers when towed with a civilian truck. It seems like people are doing everything from axle swaps, retrofitting electric brakes on the existing trailer axle, replacing the air over hydraulic system on the trailer with and...

I've done a few internal repairs to the MEP805/6B color displays. If it is something wrong with the lcd screen, wiring, connections, etc., it is usually an easy fix. The motherboard however, that's a different story. They're not available from WinSystems anymore, and I haven't had any luck...

Linear regulators require at least 2-3 volts higher input than output voltage to work properly, and they need a heat sink. Most circuits the use them also have a capacitor from the input pin to ground pin, and another capacitor from the output pin to ground. I can't remember how to calculate the...

It isn't a 100% efficient conversion from input power to RF power out, plus there are things like meter backlights, the speaker, etc. I seem to remember a typical CB drawing a couple amps when transmitting. I haven't messed with one for years though. Your best bet is to measure the actual...

The CB will draw a lot more current than a LM7812 can handle. At 28.8v input voltage, a LM7812 could only handle a max of 700mA before the 12 watts of maximum power dissipation would be exceeded. You'll have to use one of the DC-DC 24v to 12v buck converters people on here have been talking...

This is certainly the best all around option in my opinion. Small/intermittent loads are fine to be "center tapped" without any additional considerations, but larger and more continuous loads would need an equalizer or converter. A large/robust enough DC-DC buck converter would be expensive, and...

I think it is a little bit presumptuous to say a few amps of imbalance on lead acid batteries in series will "kill"them. I was just saying that it seems like people have been using the low blower motor setting on their five ton trucks for years without causing premature battery failures. Seems...

FYI, this is what they do on the M939 series 5-ton trucks to get low speed for the heater blower. They run the blower on 24v for high speed, and 12v via a wire connected between the batteries for low speed. At just a few amps, it must not be as bad as we would intuitively think.

This is for the monochrome CIM I'm assuming? If I get some time, I'll tinker with mine and see if I can figure it out. I looked at the ribbon cable schematic in the TM, but it wasn't helpful.

Great job! Glad you got it up and running!

That's great. I'm wondering if you'll run into an issue though having the rpm limited by the stop screw on the injection pump. Once you put a load on it, it won't be able to increase fuel delivery to compensate, and the hz will drop. I think the screw needs to be backed out so the electric...

I just went and looked at both of mine. The potentiometer is called "speed trim." Mine are at about 70% and 80% on my two generators. Just for kicks, I adjusted one all the way down to zero, and the frequency was 53hz. So, if yours is all the way down (counter clockwise), there's hope of getting...

I'd just quickly validate with your friend's dmm that the actual frequency matches the display, then I'd try bumping up the rpm with the potentiometer on the governor module. I think it is labeled "speed" or something self explanatory like that. Just note the starting position so you can move it...

That's great, almost done! What hz is it producing? Does the hz displayed match the actual hz as measured with a meter? The frequency is obviously a function of engine rpm. There is of course the 50/60 hz switch on the panel inside the box, and the engine rpm can be adjusted with a...