TAV-L1 (serv.man4) - Sony Audio Service Manual (repair manual). Page 48

48

48

5-1. Error messages

(2) “DEMO” – page 39

LIFT DEMO mode can be set in shop for sales demonstration.
If the shop didn’t release the mode and sell the set to the customer, 
“DEMO” is displayed and Lift unit moves up and down automatically.

Please do not open the setting and releasing method in safety view.

(3) “LOCKED” – page 35

“LOCKED” is displayed in DISC LOCK mode when you push EJECT button.

This mode is set in shop to prevent a sales promotion disc be stolen.
If the shop didn’t release it and sell the set to the customer, this problem occurs.

Please do not tell the setting and releasing method to the customer to keep
this information secret.

Next one is “DEMO” of LIFT DEMO mode.

This mode is a sales promotion mode for shops. LIFT DEMO modes repeat the 
following operation.

1) Lift unit moves down. 2) Lift unit stays for 3 min. 3)Lift units moves up.

4) Loft unit stays for 10 sec.

But, if the shop didn’t release this mode and sell the set to the customer, the 
customer will ask the solution to Service center.

This is explained in “Troubleshooting” in Operating Instructions.

Please find the releasing method on the service manual .

In safety view, please do not open the releasing method to the customer.

The last one is “LOCKED” of DISC LOCK mode.

This mode is also for the shops to prevent the stealing of sales promotion disc.

Please find the solution on the service manual. 

And,  please do not tell the releasing method to the customer as possible. 

If the releasing method is opened to the market, the discs in the shops will be 
stolen.