Yamaha NS-BP300, Service Manual

Page: 31 / 84

31
R-840/NS-BP300
R-840/NS-BP30
0
PRESET INHIBIT (Initialization inhibited)
Back-up IC initialization is not executed.
Select this sub-menu to protect the values set by the user.
PRESET RESERVED (Initialization reserved)
Initialization of the back-up IC is reserved. (Actually, initialization is executed the next time the power is
turned on.)
Select this sub-menu to reset to the original factory settings or to reset the back-up IC.
Any protection history will be initialized.
3 0 . P R T I N H
3 0 . P R T R S R V
4 1 . P S 1 : 0 5 1 9
4 2 . P S 2 : 0 5 1 9
4 3 . D C : 0 0 3 6
3. FACTORY PRESET
This menu is used to reserve/inhibit initialization of the back-up IC.
Select this menu and press the “PRESET ” (Up) key to change display.
4. AD DATA CHECK
This menu is used to display the A/D conversion value of the microprocessor which detects panel keys of this unit and
protection functions by using the sub-menu. (Reference voltage: 5.0 V = 1023)
4-1. PS1
Power supply voltage protection 1 detection
Voltage detects: ±B, +VP and +9T.
Normal value: 366 to 687
(Reference voltage: 5.0 V = 1023)
* If PS1 becomes out of the normal value range, the protection function works to turn off the power.
4-2. PS2
Power supply voltage protection 2 detection
Voltage detects: +9T, ±7V and +3.3DAB (A, B models).
Normal value: 366 to 679
(Reference voltage: 5.0 V = 1023)
* If PS2 becomes out of the normal value range, the protection function works to turn off the power.
4-3. DC
Power amplifier DC (DC voltage) output detection
Normal value: 0 to 500
(Reference voltage: 5.0 V = 1023)
* If DC becomes out of the normal value range, the protection function works to turn off the power.