Yamaha MCR-730 Service Manual page 33

8. 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 in using the sub-menu.
When KEY menu is selected, keys become non-operable due to detection of the values of all keys. However, it is
possible to advance to the next sub-menu by turning the INPUT of this unit.
* Numeric values in the figure example are for reference.
P1/P2 (Power supply voltage protection detection)
Power supply voltage protection value
(Normal value: P1: 190 to 380, P2: 260 to 450)
P1: Detects +12FL, -20D and +3.3.
P2: Detects Vp, +20D, +5FL and +10T.
* If Px is out of the normal value range, the protection function works to turn
off the power.
(Reference voltage: 5V=500)
P3/DC (Power supply voltage protection detection/
Power amplifier DC protection detection)
P3: Amp DC protection
Detects 6R3V, V+5V and 3R3.
(Normal value: 160 to 240 (select input DVD), 0 to 30 (select input other))
* If Px is out of the normal value range, the protection function works to
turn off the power.
(Reference voltage: 5V=500)
DC: Power amplifier DC (DC voltage) output is detected.
(Normal value: 180 to 320)
(Reference voltage: 5V=500)
DV/DK (DVD/DOCK)
DV: DVD power supply detection.
(Normal value: 240 or more)
DK: DOCK type detection
(Reference voltage: 5V=255)
DESTINATION
The destination of this unit is displayed.
Destination for AD port (pin no. 97 of IC11) pull-up resistance 10k-ohms.
Destination for AD port
Pull-up resistance 10 k-ohms
ohm
V 0 - 0.5
Value 0 - 50
pin 97 (DEST)
0 + 2.7 k
0.5 - 1.6
50 - 160
U, C G, F
8 . P 1 : 2 8 8 P 2 : 3 4 9
8 . P 3 : 1 9 8 D C : 2 6 0
8 . D V : 3 3 1 D K : 5 0 0
8 . D E S T : 0 0 0
+ 6.8 k + 15.0 k
1.6 - 2.5 2.5 - 3.6
160 - 250 250 - 360
L, V K, A
DRX-730/NX-E700
+ 47.0 k
3.6 - 5.0
360 - 500
T
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