MP6500 THERMISTER

[fshead]

i gotta return to a mp6500 wth a mil copies that does as it feels
giving me sc 555,sc552,sc542 codes and a major headache...........
swapped out the thermister wth old style thermister and for some reason the rear thermister seems to go only to 168 degrees and the middle 190s..not good
cked pinch wires,lamps,rear connector and did the typical fuser adj that normally deals wth these codes..everything i read on goose and did firmware update 3 weeks ago.
going to order the new style thermisters and wanted to know what replaced the aw10-0108/0109 thermisters?
will end up replacing this machine with a mp6001 with low count but may take a few weeks to find
thanks

[Herostrat]

Re: MP6500 THERMISTER

Before replacing machine try replacing PSU board,and is hot roller oem,how meny pages did hot roller do?

[fshead]

Re: MP6500 THERMISTER

Before replacing machine try replacing PSU board,and is hot roller oem,how meny pages did hot roller do?

thnx 4 your reply.
the teflon roller is OEM and maybe was replaced 3 months ago and 75k to 90k max..
have not had any 542,552,555 codes till yesterday.
i disconnected the surge protector too and just find it odd wth a 20 to 30 degree difference wth rear thermister vs middle..
the previous machine that this replaced also started to give me odd random codes but more wth bias,corona etc codes..
i will mess with this machine when i got it back in shop but right now im hoping i can revive it for a week or two till i find a mp6001 with less than 150k.
might have to settle wth one in the 200k to 300k range..just hoping for less hands in the mix

[blee]

Re: MP6500 THERMISTER

going to order the new style thermisters and wanted to know what replaced the aw10-0108/0109 thermisters?

By the way, the new thermistor numbers are AW10-0131/0132

[Cipher]

Re: MP6500 THERMISTER

There is also a newer type of cleaning web that has more oil content for the purpose of keeping the surface of the hot roller / thermistors clear of toner build up.

Old AE045067
New AE045069

So I would update the firmware, change over the two thermistors and thermistor angled brackets and the cleaning web to the newer types.

[slimslob]

Re: MP6500 THERMISTER

for some reason the rear thermister seems to go only to 168 degrees and the middle 190s..not good

Sounds like you may have a bad heat lamp. In particular, the one that heats the ends of the hot roller. Could also be the auxiliary heat lamp (280 W).

[fbkhan3]

Re: MP6500 THERMISTER

SC 542,555,545 was the common issue on this specific Models have a look at the attached pdf.

New thirmistor AW10-0131/0132 with Modified brackets and Thermostat as mentioned in RTB.

Make Sure Line Voltages doesn't have any issue.


HTH

Regard's

[fshead]

Re: MP6500 THERMISTER

Sounds like you may have a bad heat lamp. In particular, the one that heats the ends of the hot roller. Could also be the auxiliary heat lamp (280 W).

i gotta be honest i wanted to ck the lamps but my bag i had with me was my laptop bag with a few tools as i was
heading in to set up a machine and such.
i never heard of a lamp heating only the ends but i do now..
i did ck thru the service mode to turn on heater lamps but did nt see anything..
cheated door switch it looked like all 3 were on but cant say 100%..
will pick up my new thermisters and take a set of lamps and will ck back in

thnx

[fshead]

Re: MP6500 THERMISTER

SC 542,555,545 was the common issue on this specific Models have a look at the attached pdf.

New thirmistor AW10-0131/0132 with Modified brackets and Thermostat as mentioned in RTB.

Make Sure Line Voltages doesn't have any issue.


HTH

Regard's

thnx
i gotta think some of wacky stuff can be line voltage drops..
there is a lot of construction downtown where this machine is.
i cant afford a fancy tester that i know my counterparts resort to when
the need to know.

[slimslob]

Re: MP6500 THERMISTER

i never heard of a lamp heating only the ends but i do now..

On most machines with two or more lamps, one lamp has a single heat element that heats the center portion of the hot roller and is control by the middle thermistor. The other heats the ends of the roller and is controlled by the end thermistor. If there is a third, auxiliary, lamp, it is usually a lower wattage and heats the entire length of the roller. The auxiliary lamp is used to shorten warmup time.

[Herostrat]

Re: MP6500 THERMISTER

Guys thanks for new thermistors part number update...tho I am a little skeptic about it cause I had problem on MP5500 that burned the pressure roller cause he had (what I think wrong) thermistors...don't know the part number out of my head but I can only describe them as "slim" ones.
They didn't measure temp. correctly and machine didn't know when to start turning fuser (witch wuld cool pressure roller down a bit..or shuld we say even the tepmerature across pressure and hot roller) and so it burned the whole thing down.
I allso newer heard of heating lamp being able to heat up only one end of hot roller,I think of them as one,wuldn't be the first time I'm wrong tho.Yet if lamp is conducting curent then it's working proper in my opinion.
I'm betting on Thermistors or PSU board...I swaped few PSU boards cause of SC553 and yes thermistors were showing
end 170/center 190,after swaping board they were measuring heating and cooling at same rate.

[fshead]

Re: MP6500 THERMISTER

Guys thanks for new thermistors part number update...tho I am a little skeptic about it cause I had problem on MP5500 that burned the pressure roller cause he had (what I think wrong) thermistors...don't know the part number out of my head but I can only describe them as "slim" ones.
They didn't measure temp. correctly and machine didn't know when to start turning fuser (witch wuld cool pressure roller down a bit..or shuld we say even the tepmerature across pressure and hot roller) and so it burned the whole thing down.
I allso newer heard of heating lamp being able to heat up only one end of hot roller,I think of them as one,wuldn't be the first time I'm wrong tho.Yet if lamp is conducting curent then it's working proper in my opinion.
I'm betting on Thermistors or PSU board...I swaped few PSU boards cause of SC553 and yes thermistors were showing
end 170/center 190,after swaping board they were measuring heating and cooling at same rate.

i m heading to my headache 6500 with set of lamps,complete thermostat ,all 3,my meter"duh"..
two thermisters,although could only get 1 new style end and have one old style middle...
the only way i was able to get the end temp to 170 was increasing the middle back from 180 to 190..
looked at the lamps and the aux is 280w and the top lamp wth the 650 and 550 w below but cld not see
a major difference where the 550w is heating only the ends..im no lamp expert but i ll take it if it works..
will update..
thnx

[slimslob]

Re: MP6500 THERMISTER

Guys thanks for new thermistors part number update...tho I am a little skeptic about it cause I had problem on MP5500 that burned the pressure roller cause he had (what I think wrong) thermistors...don't know the part number out of my head but I can only describe them as "slim" ones.
They didn't measure temp. correctly and machine didn't know when to start turning fuser (witch wuld cool pressure roller down a bit..or shuld we say even the tepmerature across pressure and hot roller) and so it burned the whole thing down.
I allso newer heard of heating lamp being able to heat up only one end of hot roller,I think of them as one,wuldn't be the first time I'm wrong tho.Yet if lamp is conducting curent then it's working proper in my opinion.
I'm betting on Thermistors or PSU board...I swaped few PSU boards cause of SC553 and yes thermistors were showing
end 170/center 190,after swaping board they were measuring heating and cooling at same rate.

Actually, the "end" lamp" heats both ends. As for melting the pressure roller to the hot roller, it is usually the result of repeatedly resetting the fusing error with out correcting the cause.

[NeoMatrix]

Re: MP6500 THERMISTER

When the machines were first released there was a thermister mounting bracket modification for the MP 6500 and MP7000. Couple of years ago now.
Also check the heater lamp connectors at the rear side of the fuser unit. If you have fit these incorrect you will have the wrong heater lamp coming on giving the wrong fuser timing an SC error codes.

HTH

[fshead]

Re: MP6500 THERMISTER

Sounds like you may have a bad heat lamp. In particular, the one that heats the ends of the hot roller. Could also be the auxiliary heat lamp (280 W).

as i sit enjoying a fine glass of wine i thank you.
i never thought the heater lamps had any other purpose but heat up the roller in a determined time>>>>wrong.
i did try cheating warm up by opening n closing fnt door>>no good
yes there is a lamp for just the ends...as it turns out the bottom blue connector lamp 550w went out.
wth meter in hand n some friday kharhma....my happy law firm was back in biz adding to the world
more useless piles of paper and things to be read..