Who can understand what the handwritten letters in the picture are

[daisizhou]

Hello everyone, I am reading a document, but there is a handwritten character on it.

I cannot recognize all the content. If you can understand it, please let me know. Thank you

[Shonky]

Hard to say for sure since what I read doesn't make much sense. I have it as

hold down maintenance
made bottom code
6645

"made" might be "mode" but made seems to make some sense.
"bottom" might be "button" - actually that seems more likely.

[inse]

Lets place it like this:
Hold down maintenance mode button
Code 6645

A description how to enter a locked service menu, maybe?

[IanB]

I agree with inse:

hold down maintenance
mode button code
6645

[daisizhou]

https://med-lasers.ru/wp-content/uploads/2022/10/Candela-VBEAM-Perfecta-Service-Manual.pdf
The information comes from the connection above, which is a laser service manual.
I am looking for how to enter 'maintenance mode'
If you know, please let me know. Thank you

[IanB]

That's a very complex device. Do you have it in your possession? At a minimum it would seem you need the operator's manual to understand what the controls do.

Apparently it has a touch screen display, so most operations would be performed through that.

I'm guessing there is a "Maintenance Mode" button somewhere, and that 6645 is a code like a password to enter that mode.

It goes without saying that it is a highly dangerous device, and if you are not familiar with how to operate it or maintain it, then you are at significant risk of a life-altering injury or even death.

[daisizhou]

Yes, I am repairing it.I have repaired similar lasers, and this model is the first time I have encountered it.
I hope to calibrate the high-voltage power supply, but I don't know how to enter the "maintenance mode"

[darkspr1te]

Try holding down the Spanner icon (if touch) or any mode button the panel.
When i was working with medical equipment for Phillips most of our gear had a button on the main pcb for maintenance, sometime labeled Interlock-defeat  , sometimes just MAINT and on all the larger tech it was unlabeled and in machines like the MRI systems was even behind a screw panel and still required a code on the computer  of HMI to continue. It was all part of the steps we took to ensure our safety.
there was some tech i repaired like de-fibs which had a power on sequence you did to enable maintenance mode, it had to be on Main input (charging) , paddles had to be unplugged and a cap fitted and when you power up you also held the discharge safe button which dis-armed the device until a code was entered with the 4 way key (up =1, right 2 etc)
a quick look at other devices from the same maker shows they have a hidden screen which is displayed by holding next for 2 or more seconds. when i dont know as there is no pictures.


darkspr1te

[darkspr1te]

This is from another model,
https://cdn.medwrench.com/eMan/manualNo/10912/gentlelase%20service%20manual.pdf