Kenwood KDC-Z727 Service Manual page 7

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MICROCOMPUTER'S TERMINAL DESCRIPTION
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PinNo. Pin name
46 NC
47 PNL_DET
48 CD_MUTE
49 CD_MRST
50 CD_MSTOP
51 CD_LO/EJ
52 CD_LMON
53 CD_SW3
54 NC
55 BVdd
56 BVss
57 DSI
58-64 NC
65 PN_MC_REQ/PANEL
66 PAN_RST
67 LED_SW
68,69
70 AVCONT
71 AVdd
TE
L 13942296513
72 AVss
73 AVref
74 PHONE
75-78 NC
79 MP3/CD
80 S-METER
81 TYPE1
82 TYPE2
83 NC
84 ST_TYPE1
85 ST_TYPE2
86 NC
87 DISC_EJ_SW
88 CH_REQC
89 PN_SC_REQ
90 CD_SW1
91 CD_SW2
92 ACC_DET
93 BU_DET
94 CH_DATAC
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95 CH_DATAH
96 CH_CLK
97 PN_SC_DATA
.
98 PN_MC_DATA
99 PN_MC_CLK
100 NC
I/O Description
O
I Panel position detection input
I Muting input from CD mechanism
O Reset output to CD mechanism
O Stop request to CD mechanism
I/O CD mechanism loading motor control (Load/Eject)
O CD mechanism loading motor control (ON/OFF)
I Input from CD mechanism SW3 (DOWN_SW input)
O Output open.
Connected to B-U 5 V
Connected to GND
O DSI LED control output
O Output open.
I/O Send request output to Panel uCOM/Panel detection input
O Reset control output to Panel uCOM
O LED control output for EJECT SW and DISC _OUTPUT open. ILL ON:HI, ILL OFF:LO
O Output open.
O A/D reference voltage control output
Connected to B-U 5 V
Connected to GND
A/D reference voltage
I PHONE detection input
I Resistor connected to GND
I MP3/CD identification input
I FM S-meter input from F/E
I Destination type ID input
I Destination type ID input
I Resistor connected to GND
I E-VOL setting selection input
I E-VOL setting selection input
O Output open.
I CD EJECT SW input (Interrupt input)
I Send request input from CD-CH (Interrupt input)
I Send request from Panel uCOM
I Input from CD_SW1 (Loading SW detection)
I Input from CD_SW2 (12 cm CD detection)
I Acc detection input
I B-U detection input (Interrupt input)
I Data input from CD-CH
O Data output to CD-CH
x I/O Clock input/output from/to CD-CH ao u163
y
I Data input from Panel uCOM
i
I/O Data output to Panel uCOM
O Clock output to Panel uCOM
O OUTPUT OPEN
KDC-Z727,Z727
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Processing Operation
Panel open (SW ON): Low.
Panel closed (SW OFF): High.
MUTE:LO
RESET:LO
STOP:LO
LOAD:LO EJ:HI
LOAD:LO EJ:HI
ON:HI
Panel detached: ON. Panel attached: OFF.
Panel detection input. Panel ON: Low.
Same function as PNL 5 V.
During operation: High.
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TEL muting: 1 V or less. NAVI muting: 2,5 V or more.
CD: Low. MP3: High.
(Analog input)
K (North America): H. M (General overseas): L
K (North America): H. M (General overseas): H
Normal: Low. Special: High.
Normal: Low. Special: High.
CD ejection: Low. (Interrupt input)
ON: Low. (Interrupt input)
(Interrupt input)
LO:ON, HI:OFF
LO:ON, HI:OFF
HI:ACC OFF, LO:ACC ON
B-U power down: High. B-U normal: Low.
Muting and mechanism operation stop should
be executed quickly. (Interrupt input)
m
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