Dear Root

Thanks, did all what you said (nothing)

I even exchanged the 2 sensors from another Century (same parts numbers), nothing, nothing.

I am checking in the diagrams on PCB 9-5-3 page 2-17 of service manual but there is not much to check

1 Capacitor and then comes the microprocessor

so I think I will have to check the microprocessor, if someone feels I am looking too far please feel free to post 😕

Since the door open and closes once when I plug in the power cord, must be a problem in the timer and I suppose its in the processor

P83C528

32kx8 ROM

5 | 2x8 RAM

uPR0CESS0R

PS: What type of sensor is the one of the gear box ???

Check fuses & poewer supply to sensor receiver, transmitter, & motor control.

Hi

While checking the voltage on the sensor receiver it suddenly closed the mechanism (the century is kind of nude, no window anymore), Tried to find where was the problem but was not really able to find it.

I just resoldered the 3 wire plug on both side and until now it keeps closing the mechanism.

I did not get how it works, as usually the sensors are hidden. How does the sensor detect the hand ???

To make it work I have to move the sensor receiver aways and when turning it back to the unit it opens the mechanism. 

Drives me crazy that door thing.

When you place the sensor (PCB20- receiver)  in its location the door does not close nor open.

When you place the sensor out of its location upside down doors are opening and closing normally when passing hand above the sensor.

Could it be a problem inside the wires ??? like cut somewhere !!!

I can post pictures if it can help

Hi Bos00

I will go nuts with that door thing

Changed with a known working sensor, no change

Checked cable continuity OK

Checked voltage 5.0 Volt at sensor between ground and brown wire, 0.600 between the ground and the white wire.

Fooling around created another problem no more 5 volts at sensor, had to change a 10 ohms R, that is the one that changes 5.2 volts to 5.0 volts

Does the same symptom with the working sensor of another century

Keeps working upside down and once inserted it its place : NOTHING ..... 🙁

Did not find the crying smiley but could use it !!!!!

Hi everyone

Back to the door thing

Did more testing the doors are working when radio is on.

But if I press CD and when the CD does not get recognized the doors stays open.

So the problem is with the CD, but why can it work sometimes a whole day and suddenly I cannot start it anymore.

Bad contact Somewhere ???

Are the doors related with the CD ???

I believe they are related if I remember correctly. They use the same motor for the CD clamper and the sliding glass door. I don't know if this is of any help in this case though.