SD-NX10 (serv.man10). Part 7 - Voltage table, Waveforms, Troubleshooting tables, IC tables - Sharp Audio Service Manual (repair manual). Page 13

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SD-NX10H
– 88 –
1
P77/AN7
SD_ST_IN
Input
Tuner tuning and stereo receiver signal detection.
(A/D Input)
Not tuned: "H", SD input: "M", ST: "L"
2
P76/AN6
KEY1
Input (A/D Input)
A/D KEY input 1.
3
P75/AN5
KEY2
Input (A/D Input)
A/D KEY input 2.
4
P74/AN4
KEY3
Input (A/D Input)
A/D KEY input 3.
5
P73/AN3
P-DWN
Output
Vref voltage cut when detecting the power failure at SYS-STOP.
"H"= Normal state, "L"= Power failure
6
P72/AN2
TUNER_SM
Input (A/D Input)
Tuning level detection. Output: "L"
7
P71/AN1
PROTECT
Input (A/D Input)
Ignored for 500msec after detecting error and turning on the power.
Power is turned off when the input voltage is 2.5V or below.
8
P70/AN0
SPAN
Input (A/D Input)
Input: "L"
9
PB3
POWER
Output
Control of connection to or disconnection of the primary side power
supply. "H"= Connection, "L"= Disconnection
10
PB2/DA
H.P_SW
Input
Switch for the headphones connection detection.
"H"= Headphones, "L"=Speaker
11
P57/SRDY3/AN15
MD_DISC_IN
Input (A/D Input)
Detects the MD disc at the exit section inside the lid.
3.76V or below= Exists at the exit. Over 3.76V= Not exist at the exit.
12
P56/SCLK3/AN14
CD_SENS_A
Input
Clarion mechanism disc optical sensor A.
"H"= Shut out by the disc, "L"= Not shut out
13
P55/SOUT3/AN13
CD_SENS_B
Input
Clarion mechanism disc optical sensor B.
"H"= Shut out by the disc, "L"= Not shut out
14
P54/SIN3/AN12
CD_SENS_C
Input
Clarion mechanism disc optical sensor C.
"H"= Shut out by the disc, "L"= Not shut out
15
P53/SRDY2/AN11
MD_LOAD_SW
Input
MD LOAD SW detection. "L" 
 "H"= DISC IN
16
P52/SCLK2/AN10
MD_ST
Output
1. Beginning of the CD track: 20Ms. "H" output.
2. MD ON (RESET): 100mS. "H" output.
17
P51/SOUT2/AN9
MD_SERACH
Output
CD play: "L" (including CUEW/REVIW)    Others: "H"
18
P50/SIN2/AN8
MD_RESET
Output
MD RESET output.
19
P67/SRDY1/CS/SCLK12
MD_D_STB
Input
MD strobe input.
20
P66/SCLK11
MD_D_SCK
Output
MD clock output.
21
P65/SOUT1
MD_KDATA
Output
MD KEY data.
22
P64/SIN1
MD_DATA
Input
MD data input.
23
P63/CNTR1
CD_BUS3
Input/Output
Data input/output terminal for CD interface 3.
"L" output fixed except CD function
24
P62/CNTR0
CD_BUS2
Input/Output
Data input/output terminal for CD interface 2.
"L" output fixed except CD function
25
P61/PWM
CD_BUS1
Input/Output
Data input/output terminal for CD interface 1.
"L" output fixed except CD function
26
P60
CD_BUS0
Input/Output
Data input/output terminal for CD interface 0.
"L" output fixed except CD function
27
P47/T3OUT
CD_BUCK
Output
Clock output terminal for CD interface.
"L" output fixed except CD function
28
P46/T1OUT
CD_CCE
Output
Chip enable output terminal for CD interface.
"L" output fixed except CD function
29
P45/INT1/ZCR
CD_CHK_SW
Input
Clarion mechanism disc chucking detection SW.
"L"= Non-chucking, "H"= Chucking completed
30
P44/INT4
D_CONT
Input
"L" fixed.
31
P43/INT3
IC_CLK
Output
External control IC related clock.
SANYO C bus, input/output expander.
32
P42/INT2
REMOCON_IN
Input
Remote control input.
33
P41
IC_DI
Output
External control IC related DATA output.
SANYO C bus, input/output expander.
34
P40/INT0
SYS_STOP
Input
Microcomputer backup detection.
"H"= Normal state. "H" 
 "L": Power failure detection
35
RESET
RESET
Input
Microcomputer reset terminal. "L" 
 "H": Microcomputer reset
36
PB1/XCIN
IC_CE
Output
External control IC related chip enable output.SANYO CCB bus
37
PB0/XCOUT
IC_DO
Input
External control IC related DATA output.SANYO CCB bus
Pin
No.
Input/Output
Port Name
Terminal Name
ICD01  RH-iX0381AWZZ: System Microcomputer (IX0381AW) (1/2)
Remarks
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