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If this set temp changes on its own then the circuit board has failed. Call a service tech or replace the unit. But this 86° might be the indoor temp, not the set temp? If I set my temp to 75°, then my temp goes to 86°, then the set temp (target temp) is 75° & actual room temp is 86°. The unit may not be working properly. Not sure if this helps.
On the ASD relay, what are the other pin numbers? Is it 85, 86, 87, & 30? If so, usually pins 87 and 30 are the power side of the relay, and 30 is the power feed to the relay. It should be hot at all times, probably from a fusible link just off the battery. Pins 85 and 86 are usually the coil side of the relay. Sounds like the coil side is working, but no power feed to the relay.
log_10(x)=86/20
Use the identity a^(log_a(x))=x
in base 10: 10^(log_10(x))=x
10^(log_10(x))=x=10^(86/20)
x=10^(86/20)
Enter 10^(86/20) to get 19952.6231497 or about 19952.6
I hadn't used mine in years and had the same problem. Essentially you just need to give it a workout to get all the pixels working properly again and then it'll be just fine. I adjusted the contrast between full dark and nothing multiple times and turned the calculator on and off after each cycle and now it works like new.
First, connect the two calculators with the unit-to-unit cable.
Prepare the receiving calculator: press 2ND [LINK] F2.
Select the item to send on the sending calculator: press 2ND [LINK] F1 F2. For each program you want to send, navigate to it using the up/down arrows and press F2. Press F1 to send.
Hello, Use the TIconnect or TIGraphlink software to reinstall the programs. You will find the programs in the TI Program archives. ftp://ftp.ti.com/pub/graph-ti/calc-apps/86/.
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