10
KDC-348U/4751SD/BT41U/BT648U
/U4549/U4549SD/U549BT/X395/X695
1. Panel
ACCENT
SEARCH
RETURN
VOL
2. How to enter each Test Mode
Test Mode name
Operation
Production Test Mode
Press and hold [1] key and [3] key and reset.
Service Test Mode
In the STANDBY source, while pressing and holding [2] key, press [6] key for 7 seconds.
(Starting to press [2] key and [6] key at the same time can not be entered into the mode)
Service information clear mode
Press and hold [2] key and [5] key and reset.
DC Error Information Mode
Press and hold [3] key and [6] key and reset.
Version display mode *1
While pressing and holding [RETURN] key, press [DISP] key.
Forced update mode
Press and hold [1] key and [SEARCH] key and reset.
✳
Transition to Test Mode shall be available during DC Error detection.
*1: The model that does not support
fi
rmware update function will not also support the version display mode.
3. How to release each Test Mode
• Reset
• Momentary voltage drop
• ACC OFF
• POWER OFF
• Panel Detach
• Arbitrary key operation (
fi
rmware and version display only)
4. Production Test Mode
●
How to enter the production test mode
Press and hold [1] key and [3] key and reset.
●
Default status immediately after the mode activation
It shall be same as normal RST start in other settings than the following.
Details
Difference in action
Period to prohibit TEL/LINE MUTE immediately
after activation (normally 10 seconds)
1 second
Initial CD mechanism operation at start-up
Prohibited
Write-in to E2PROM when detecting a DC error
Prohibited
Demo Mode ON/OFF Setting Menu
Prohibited
Power supply during ACC OFF (Back Up On)
MUTE terminal turns OFF after 2 seconds (When the terminal
is turned OFF, the CD mechanism does not function)
BEEP sound
Beep with short-pressing in any functions
TEST MODE
