Yamaha YMC-700 Service Manual page 42

YMC-700/YMC-500
QQ
3 7 63 1515 0
M: A/D DATA
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.
When KEY1/KEY2 menu is selected, keys become nonoperable due to detection of the values of all keys.
However, it is possible to return to preceding mode, in which keys become operable again, by turning the "VOLUME"
knob of this unit.
1: KEY1: : KEY2: (Panel key of this unit)
When the A/D conversion value of the panel
key becomes out of the specified range
(standard value ±4), normal operation will
TE
not be available.
L 13942296513
In this case, check the constant of voltage
dividing resistor, solder condition, etc. Refer
to table.
(Reference voltage: 3.3V=255)
Displayed
0 – 4
40 – 52
98 – 110
148 – 160
201 – 213
255
Displayed
0 – 4
121 – 133
255
2: PRV1:
Power supply voltage protection detection.
Voltage detects:
www
Port detect:
Normal value:
.
Example
2: PRV1
42
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Example
M: A/D DATA
– >
1: KEY1 : 255 KEY2: 255
HL
VOLUME: 25
AUDIO: – –
VIDEO: – –
KEY1 (7 pin of IC381)
〈 (LEFT)
︿ (UP)
〉 (RIGHT)
﹀ (DOWN)
ENTER
Key off
KEY2 (6 pin of IC381)
CONTROL
BACK
Key off
+ 1 2 A , + 6 V, + 5 V, + 5 A ,
-5A, +3.3V, +2.5V
Pin No. 5 of IC381
x ao
y
133 to 190
(Reference voltage:
i
3.3 V=255)
: 148
8
3: DC_PRT: (PRD)
Power amplifier DC (DC voltage) output is
detected.
Voltage detects:
Q Q
3 6 7 1 3
Port detect:
Normal value:
Example
3: DC_PRT : 175
4: DOCK_ID:
DOCK type detection
(Reference voltage: 3.3V=255)
Port detect:
Example
4: DOCK_ID: 252
DOCK detection for AD port
Pull-up resistance 10 k-ohms
DOCK type
(15 pin of C382)
u163
No connected
.
2 9 9 4 2 8
Volume knob detection
Port detect:
VOL_RA: Pin No. 64 of IC351
VOL_RB: Pin No. 67 of IC351
H: High, L: Low
SP_FL±, SP_FR±, SP_C±,
1 5 0 5 8 2 9 9 4
SP_SL±, SP_SR±
Pin No. 1 of IC382
139 to 216
(Reference voltage:
3.3 V=255)
Pin No. 15 of IC382
A/D value
(3.3V=255)
m
Bluetooth 5 – 25
co
iPod 120 – 140
250 – 255
9 9
2 8 9 9