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This is a good question cuz on my '93 I need to change my cluster with a rebuilt spare I have. Only problem is my car has 85K miles and my extra cluster, also from a '93, has around 185K so I'd like to change over the mileage some how. I'm not into electronics so I have no idea how, or if, this could be done. Sorry to jump the thread with different years.
Looking at Yamae's pic if your mileage is in the eeprom on the cluster circuit board this should be no problem.
If someone starts a new thread and wants to dig in we can take a look.
Contacted United Chemi-Con technical support and KMQ was also suggested as a replacement for KMA and KME...
Input?
Hi Yoda,
I don't like that first link for the KMQ's in the datasheet unless you need 160+ working voltage.
The ccfl tube circuit might need the high volt caps and if so plz disregard that but if it is +5-12V circuit I would use much lower voltage caps or pay a price in higher ESR for the higher working voltage rating.
I don't know, what ya'll think.
Hi Yoda,
I don't like that first link for the KMQ's in the datasheet unless you need 160+ working voltage.
The ccfl tube circuit might need the high volt caps and if so plz disregard that but if it is +5-12V circuit I would use much lower voltage caps or pay a price in higher ESR for the higher working voltage rating.
I don't know, what ya'll think.
One thing to notice is capacitor technology has evolved considerably in the past 20-30 years.
Smaller case sizes with same or improved performance.
Here's the thing, the smaller case size for equal capacitance and voltage means the lead centers are off.
So when recapping, I take measurements of all capacitor cases.
Going with a higher voltage (through 100V) offers lower ESR, increased ripple current....so an improvement.
My cluster experiences stuck tachometer and speedometer needles on hot humid days, although infrequently and remporarily, so recapping may resolve this issue.
One thing to notice is capacitor technology has evolved considerably in the past 20-30 years.
Smaller case sizes with same or improved performance.
Here's the thing, the smaller case size for equal capacitance and voltage means the lead centers are off.
So when recapping, I take measurements of all capacitor cases.
Going with a higher voltage (through 100V) offers lower ESR, increased ripple current....so an improvement.
My cluster experiences stuck tachometer and speedometer needles on hot humid days, although infrequently and remporarily, so recapping may resolve this issue.
There are 2 items I'd better to inform you.
1. Too high voltage capacitors are not recommended to use due to the poorer performances.
2. Hot days make electrolytic capacitors to work better than cold days.
There are 2 items I'd better to inform you.
1. Too high voltage capacitors are not recommended to use due to the poorer performances.
2. Hot days make electrolytic capacitors to work better than cold days.
Following is a list of proposed KMG replacements for discontinued KME series:
EKMG250ELL221MHB5D
EKMG500ELL221MJC5S or EKMG630ELL221MJ16S
EKMG350ELL331MJC5S or
EKMG500ELL331MJ16S
EKMG630ELL100ME11D or
EKMG101ELL100MF11D
EKMG350ELL101MF11D
Higher voltages are necessary to maintain case size/mounting centers when transitioning from KME to KMG series.
Attached KMA, KME and KMG specifications suggest increased voltages in same case size offer benefits, with no apparent downside.
Welcome critique on United Chemi-Con capacitor list above...
Several KMA series capacitors which have yet to sort out a superceding series...
Following is a list of proposed KMG replacements for discontinued KME series:
EKMG250ELL221MHB5D
EKMG500ELL221MJC5S or EKMG630ELL221MJ16S
EKMG350ELL331MJC5S or
EKMG500ELL331MJ16S
EKMG630ELL100ME11D or
EKMG101ELL100MF11D
EKMG350ELL101MF11D
I like this list and voltages, so far looks good to me.
Might like it more when you say where you intend to source them so I can see price and availability- found all these PN#'s at Newark and they had full stock on most all except two. One was out of stock and one had low stock.
I usually stick with name brands and have never needed to consult mfg for recommendations- I just go with what's available and works and fits.
Offset pins are no problerm as I can bend the wire leads as needed to do my own offset so this will never trap me into using one brand(or style)
This may raise the cap a little from the board and that's ok except when there is a height restriction in tight places.
For replacements I replace with voltages from original value up to 3x the circuit voltage(most caps 10uf to 100uf) on average, It will be a hard sell to convince me to go over 5x the circuits voltage for a replacement cap over 10uf unless special application or circumstances.
Just my thoughts and I realize everyone does it different and that's ok.
Makes life fun and interesting.
1998 -2000 LS400 Instrument Cluster Meter Capacitors Replaced
Acquired necessary capacitors from Newark Electronics and Mouser Electronics.
Replaced obsolete United Chemi-Con KME series with improved United Chemi-Con KMG series.
In several instances, it was necessary go with a slightly higher voltage to maintain case size/lead centers.
When replacing older electrolytic radial leaded capacitors, it is critical to take case size measurements with larger flush mounted
United Chemi-Con KMA series are obsolete, and factory information on substitutes was sparse, so contacted Nichicon...
All KMA were replaced with Nichicon UST, UPJ
The 180uf 10V United Chemi-Con SXE series was replaced with Panasonic EEU series..
hope this is correct.
Was unable to find a replacement for the United Chemi-Con KMA series 25V 100uf 7mm tall capacitor...in fact it is not shown in KMA data sheet...suggestions welcome.
25V 100uf low profile (7mm) UCC capacitor. Main circuit board after capacitors replaced.
Capacitors adjacent to voltage regulator heat sink.. Secondary circuit board after capacitor replacement. Original UCC capacitors.
Capacitors purchased from Newark and Mouser.
Thanks to Nichicon and UCC technical support.
Next step is to replace higher use incandescent bulbs...
Acquired necessary capacitors from Newark Electronics and Mouser Electronics.
Was unable to find a replacement for the United Chemi-Con KMA series 25V 100uf 7mm tall capacitor...in fact it is not shown in KMA data sheet...suggestions welcome. 25V 100uf low profile (7mm) UCC capacitor.
Main circuit board after capacitors replaced.
Capacitors adjacent to voltage regulator heat sink..
Secondary circuit board after capacitor replacement.
Capacitors purchased from Newark and Mouser.
Good job Yoda.
Looks like a nice professional job.
You say the original caps are 7mm tall "low profile style" but what is the maximum measured height you can fit without having a space restriction on re-assembly?
If you can go a few mm taller there might be more options.
Good job Yoda.
Looks like a nice professional job.
You say the original caps are 7mm tall "low profile style" but what is the maximum measured height you can fit without having a space restriction on re-assembly?
If you can go a few mm taller there might be more options.
Awaiting feedback from United Chemi-Con...
100uf 25V does not appear in KMA datasheet.
This capacitor sits flush to circuit board, so lead spacing is important.
8.2 mm diameter case size , so will have to sort it out.
It appears a heat sink from the power supply circuit board resides just above this capacitor..which could explain the need for lower profile...the boards sandwich closer together.
Open to suggestions on a substitute.
Nichicon does not offer...
Unsure if Panasonic or Rubycon offers.
Good job Yoda.
Looks like a nice professional job.
You say the original caps are 7mm tall "low profile style" but what is the maximum measured height you can fit without having a space restriction on re-assembly?
If you can go a few mm taller there might be more options.
Awaiting feedback from United Chemi-Con...
100uf 25V does not appear in KMA datasheet.
This capacitor sits flush to circuit board, so lead spacing is important.
8.2 mm diameter case size , so will have to sort it out.
It appears a heat sink from the power supply circuit board resides just above this capacitor..which could explain the need for lower profile...the circuit boards sandwich closer together.
Open to suggestions on a substitute.
Nichicon does not offer...
Unsure if Panasonic or Rubycon offers.
Due to time constraints and lack of better soldering equipment, I engaged Tony at Anthony's Electronic Service on 4007 N. Broadway in Chicago. Small shop with lots of interesting audio components in for repair.
Tony repairs mostly high end audio electronics.
The cluster works great
Unsure whether capacitor replacement resolves the hesitant tachometer and Speedometer needles..will have to wait for summertime.
The new cathode tubes offered a noticeable improvement in light output and uniformity...
The LED ticker tape display at bottom of cluster perked up a bit.. appears truer green...less pale..
The more noticeable improvement achieved from replacing the incandescent status indicator bulbs - improved brightness, crispness and uniformity.
The "D" (Drive) bulb was tired and its plastic twist lock bulb socket was burnt.
Replaced bulbs routinely on and those that receive some usage.
On/off cycling significantly decreases incandescent bulb life, so turn signal indicators and flashing seat belt status bulbs were also on the list. This is right hand drive bulb diagram, but the same bulbs. Much more descriptive than North American bulb diagram. Replaced 4 of 83109-30070 bulbs and 10 of 90981-11018 bulbs. All sockets were in good shape except "D" . Socket 83101-30050 (blue) is discontinued so swapped it with air bag socket bulb which is never on.
North America bulb diagram (ahem)
Overall, a very well designed instrument cluster..
12-20-21, 05:29 PM
United Chemi-Con KMG and KMQ Data Sheets
