878d H-E Error
my soldering station started having a problem with the air gun not getting hot i replace the heating element no result ,am examine the board but i need some help to fix the problem
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Re: 878d H-E Error
Post some pictures of this board or boards front and back of the boards -
Re: 878d H-E Error
here are some photosAttached FilesComment
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Re: 878d H-E Error
did you solder or change anything on the main board??Comment
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Re: 878d H-E Error
only the btb 600 transistorComment
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Re: 878d H-E Error
"H-E" Heater Error, temperature is less than 50°C and not going up despite heater (triac) being turned on.
No heat can be due to an open triac or open heating element or bad wiring to the wand.
"S-E" Sensor Error, temperature reading pegged full-scale around 500°C, due to an open thermocouple or bad wiring to it.
Triac BTA16-600B is 16A 600V and must have a good heatsink.
I would look for bad solder joints and check around the opto-coupler.Last edited by redwire; 04-17-2021, 01:37 PM.Comment
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Re: 878d H-E Error
some of the soldering is total shit - even has splashes on the board!!Comment
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Re: 878d H-E Error
I would measure ohms at the PCB connector with the two red wires, the one that ends up going to the heater. So plug in the GX connector and see what you measure. The heater should be around 20 ohms.
Either that, or some problem with the triac turning on. The pics are too blurry to see.
You can clean up the pcb with rubbing alcohol and Q-tips.Comment
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Re: 878d H-E Error
nd have to replace the original triac BTA12-600B because the diode voltage drop was a bit low when I testing it in the board and when I was removing it from the board one of the pin got damaged so I replace it with this BTB25-600B from the electronic store which think the difference the ampere rating , and am also getting 110v on the lead wire that goes to the handle some and thinking its a problem with heat sensor thermocouple circuit
but wats the best way to test the opto-coupler think I may hav to use a oscilloscopeComment
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Re: 878d H-E Error
oscilloscopes are not a magic test everything device, and dont think it will help much unless you happen to also have a ramp generator circuit, and even then you still need more equipment.
Though you may need to test in situ and powered you should be able to see the voltage drop change across pin 4 and 6 of the optocoupler as you turn the heater on and off. If you test this with the triac removed it will give 90% confidence that the optocoupler is bad if the voltage doesn't change.
Yes you would need to test with live wires, so test at your own risk...Comment
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Re: 878d H-E Error
ok I will do thatComment
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Re: 878d H-E Error
from the gx connector to the heating element 28.5 ohmComment
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I've got this circuit that I've been playing with on a breadboard. I'm not happy with it mainly because the MOSFET gets too hot and generally controlling the temp of the heating element with the Arduino has proven to be a little more cumbersome than I would like.
What I would like to know, is what is the best way to set up a circuit like this? The heating element is just a PCB and its going to be mounted under a 3D-printed enclosure that a lizard will use to warm his belly.
This is the general setup that I have now.
This is what the... -
Hi all!
HISENSE 65E7KQ PRO
RSAG7.820.13512 - chassis
MT9618BAATAB - cpu
RSAG7.820.12059 - power
HD650Y3U77 - panel
KLM8G1GETF - emmc
The TV does not turn on, the standby indicator is on. All voltages are present.
Emms is dead. Not readable, not detected.
Replaced emmc.
But with another dump there is no launch
Terminal log
UART
<
AC_ON
RPMB key is not yet programmed
HASH1_VERSION=0x00000000 64bit
E-B
FDE enabled
layout pattern onebin by SAR7,0... -
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What could go wrong...?
I'm not sure if this is the right sub category or even the right forum but here goes,,,
I'll just dive right in. I want to see if it's possible and what it would take to use a PID Controller (or 2) to run a central air conditioning heater element (the kind that goes into an air handler) and a small blower fan... The application is a DIY Sauna... Am I nuts? Mean, these components could be had for around 100 bucks.
What do I need to be thinking?
Of course I will go to Vevor and order one of their 200$ sauna heaters so I...
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