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Error 131b

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Old May 15th, 2018 May 15, 2018 5:59:41 PM -   #1 (permalink)
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Default Error 131b

Hi guys,

Got "ERROR 131B" message today.
What is it ?
and how to fix it :-)
After turning off and on again printer starts normally and then showing this error again in the middle of the print.
Tried to turn it off and to disconnect it from power and USB for 15min (as internet suggested) still same problem.
Help !!

Thanks !
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Old May 16th, 2018 May 16, 2018 7:21:35 AM -   #2 (permalink)
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Default Re: Error 131b

Hi,

This is head temperature error. There are several reasons for this:

1) If you just did a head clean or flush, fluid may be on flex connector to head - with power OFF, remove head and clean all cables with alcohol and make sure dry
2) Can be cable itself, check connections both at head and mother board
3) blown head - prior to this was it printing O.K?
4) blown mother board - rare, but can happen.

Check cables on Epson mother board first then move to head and verify no ink/cleaning_solution on
cables going into head.

Keep me posted
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Old May 16th, 2018 May 16, 2018 8:26:10 AM -   #3 (permalink)
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Default Re: Error 131b

Also, when printing does it print slower than normal, pauses each pass of head OR does it print
normal speed but then throws this error? Does it throw error at start of print or at random time?

If normal then random time of error I would guess a cable issue. Is your nozzle check 100%, low
ink flow can also cause head to over heat
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Old May 16th, 2018 May 16, 2018 9:00:30 AM -   #4 (permalink)
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Default Re: Error 131b

Quote:
Originally Posted by NeoFlexExpert
Also, when printing does it print slower than normal, pauses each pass of head OR does it print
normal speed but then throws this error? Does it throw error at start of print or at random time?

If normal then random time of error I would guess a cable issue. Is your nozzle check 100%, low
ink flow can also cause head to over heat
Thank you for your answer !
Nozzle check is 100% good.
Printer prints at the same speed, and throws this error randomly.
When it happen yesterday(I didn't try to print today yet) I printed 8 full size shirts (16x20) and suddenly got this error on 9th .
After turning it off for 10 min I manages to print 4 additional shirts with no problem and then this error showed up again on 5th shirt.
i tried to print on top of the unfinished shirt twice and twice it got stuck again.
First time at the beginning of the print ( about 15% printed) and second time at the end of the print (at about 98%)

I checked all cables and they all clean and dry.
I cleaned it with alcohol anyway.
Basically I cleaned all flat cables.

Also - I noticed that before I'm getting this message printer stops printing for few seconds,"thinks" and then throw this error.

Last edited by Uz27; May 16th, 2018 at 09:05 AM..
 
Old May 16th, 2018 May 16, 2018 10:26:35 AM -   #5 (permalink)
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Default Re: Error 131b

Hmm, I do not think "actual" head temp issue, rather the Epson reads an incorrect temp and errors out?

Does it only happen on white layer - my thinking is "if" thermal then white is massive dump of ink
and head heats up.....but....that would show up consistently. However, after 10 mins (cool down?)
it works for 4 or more then kaput again.

Does heatsink on Epson board get warm/hot during printing?
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Old May 16th, 2018 May 16, 2018 11:00:05 AM -   #6 (permalink)
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Default Re: Error 131b

Started to print today.
So far I printed 9 shirts (same image and print size as yesterday)
It takes 4.28 min to print each image (and its always was that long for this image)
There is almost no "rest time" between the prints, maybe 20 sec until a new shirt loaded.
Not sure if it's relevant - but this is how much ink printer uses for this print :
C-0.116ml
M-0.099ml
Y-0.059ml
K-0.146ml
I don't have white ink.
Heatsink on Epson board is warm, but not really hot. I can touch it with my fingers and hold them on the heatsink with no problem.

Can it be a room temperature ?
I had AC malfunction yesterday and room temperature got as high as 86F.
 
Old May 16th, 2018 May 16, 2018 12:24:53 PM -   #7 (permalink)
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Default Re: Error 131b

That all seems pretty normal, we have printers in countries that have no AC with high ambient temps >100 deg without issues.

I am leaning towards cable issue, it could be changing the reading of the temp sensor or providing no
reading at all? Do you have a multimeter unit so you can measure DC voltage and reads resistance?
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Old May 16th, 2018 May 16, 2018 1:19:26 PM -   #8 (permalink)
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Default Re: Error 131b

Quote:
Originally Posted by NeoFlexExpert
That all seems pretty normal, we have printers in countries that have no AC with high ambient temps >100 deg without issues.

I am leaning towards cable issue, it could be changing the reading of the temp sensor or providing no
reading at all? Do you have a multimeter unit so you can measure DC voltage and reads resistance?
I do have multimeter.
What should I check ? And where.
 
Old May 16th, 2018 May 16, 2018 2:35:24 PM -   #9 (permalink)
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Default Re: Error 131b

Hi,

The temperature sensor output comes in on CN71, pin 8 (angle part is pin1). This is a voltage
reading which is held high by 4.7K resistor to 3.3Vdc. The sensor is connected to this point and ground.
So, reading should be below 3.3Vdc. If you can take a reading from cold start and then say
after 2/3 prints. So, red lead of meter to pin8, black to ground - heatsink or corner metal mount
pads are good ground, set meter 0-10Vdc.
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Old May 16th, 2018 May 16, 2018 3:56:32 PM -   #10 (permalink)
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Default Re: Error 131b

Quote:
Originally Posted by NeoFlexExpert
Hi,

The temperature sensor output comes in on CN71, pin 8 (angle part is pin1). This is a voltage
reading which is held high by 4.7K resistor to 3.3Vdc. The sensor is connected to this point and ground.
So, reading should be below 3.3Vdc. If you can take a reading from cold start and then say
after 2/3 prints. So, red lead of meter to pin8, black to ground - heatsink or corner metal mount
pads are good ground, set meter 0-10Vdc.
Well - I measured it "cold" and it was 3.28V .
I printed two shirts and measured it again and got the same 3.28V.
But when I sent a new print I got Error 1A37 :-((((

I REALLY hope that I didn't managed to short something!!
Now this error will not go away.
After shutting down and turning it back on this error pops up immediately.

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Old May 17th, 2018 May 17, 2018 6:21:23 AM -   #11 (permalink)
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Default Re: Error 131b

Hi,

1A37 is thermistor connection error. When you pushed the multimeter probe to measure you
probably pushed the connector pin away from the actual cable pin. The reading you got (3.28 volts is actually an indication the temp sensor (thermistor) is not connected back to the mother board.

This is good since this is probably your issue, the pin is making intermittent contact. So, remove
cable and gently using a needle or sharp point pull the pin back towards where cable plugs in
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Old May 17th, 2018 May 17, 2018 6:23:09 AM -   #12 (permalink)
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Default Re: Error 131b

....look at the other pins on the connector, make sure pin 8 looks like that. When measuring try to
touch the cable (exposed pin/pad) rather than the actual connector pin - light pressure only.
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Old May 17th, 2018 May 17, 2018 6:49:40 AM -   #13 (permalink)
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Default Re: Error 131b

....also, how does cable look? Are the metal pins/pads bent or looked cracked right where cable/pin
meet (this part is where cable changes from being covered to where pins/pads are).

If you still get this error after trying to move pin gently we can use a thin strand of wire to make contact.
Let me know what you find - this can be fixed
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Old May 17th, 2018 May 17, 2018 7:34:57 AM -   #14 (permalink)
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Default Re: Error 131b

Quote:
Originally Posted by NeoFlexExpert
Hi,

1A37 is thermistor connection error. When you pushed the multimeter probe to measure you
probably pushed the connector pin away from the actual cable pin. The reading you got (3.28 volts is actually an indication the temp sensor (thermistor) is not connected back to the mother board.

This is good since this is probably your issue, the pin is making intermittent contact. So, remove
cable and gently using a needle or sharp point pull the pin back towards where cable plugs in
When I measured it first - I got something like 2.25v but I thought that I didn't connect it good enough do I pushed a bit harder on the red lead and got 3.28v.
So next time that I measured it again (after two shirts) I got same 2.25v so I pushed harder again and got 3.28v.
I guess this is when the 8th pin got bended.
(and it is bended i can see it by comparing it to other pins)
Ill try to fix it.
Thanks !
 
Old May 17th, 2018 May 17, 2018 9:04:49 AM -   #15 (permalink)
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Default Re: Error 131b

Yep, reading should be below 3.28V, if you get this (3.28v) then pin is open. What happens is
that as sensor heats up cools down is resistance changes. Since on the Epson board there is a
resistor pulling this signal to 3.3Vdc (you measured 3.28) the sensor is connected between this
resistor and gound:

------------+----------- 3.3Vdc
|
>
< 4.7K (4700 ohms)
>
<
|
+--------(CN71 pin 8)----------- reading on meter = 3.3 x Tr /(Tr + 4700)
|
>
< Sensor Tr
>
<
|
+------------------- Gnd
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