Kenwood KDC-5019 Service Manual page 6

KDC-5019/519/7021/7021Y/8020/B7021
MICROCOMPUTER'S TERMINAL DESCRIPTION
Pin No. Pin Name
49 CH-RST
50 CH-MUTE
51 CH-CON
52 ILL-ON
M-MUTE L
53
M-MUTE R
54
55 BVDD
56 BVSS
M-RST
57
M-STOP
58
59 N.C.
60 LO/EJ
61 MOSW
62 N.C.
63 CD-SW3
64 DA-SDA/NC
65 LCE
66-69 N.C.
70 AV CONT
71 AVDD
72 AVSS
73 AVREF
74 PHONE
75 SRM-SW3
76 SRM-SW1
77 SRM-SW2
SRM-DET
78
79 NOISE
80 S-METER
81 R-DATA
82 R-QUAL
83 IFC-OUT
84,85 N.C.
86 SRM-B
87 R-CLK
CH-REQC
88
89 KEY-REQ
90 CD-SW1
91 CD-SW2
92 SRM+B
BU-DET
93
94 CH-DATAC
95 CH-DATAH
96 CH-CLK
97 L-DATA L
98 L-DATA S
99 L-CLK
100 PAN5V
6
I/O Description
O Reset output to changers
I Mute request from changers
O Changer control
O Illumination AVR on/off control output
I Mute request (L Ch.) from CD MECHA. MI-COM. Lo: Mute request
I Mute request (R Ch.) from CD MECHA. MI-COM. Lo: Mute request
- Positive power supply connection terminal
- Ground connection terminal
O Reset output to CD mechanism MI-COM.
O Stop request to CD mechanism MI-COM.
O
I/O CD mechanism loading/Eject switching output
O CD mechanism loading motor control output
O
I Down & limit switch detection input
O Clock output to D/A converter (V-LED model)
O CE output to LCD driver IC
O
O A/D converter reference voltage control output
- A/D converter positive power supply connection terminal Connected to BU 5V lines.
- A/D converter ground connection terminal
I A/D converter reference voltage input terminal
I PHONE detection input
I Mask mechanism position SW3 input
I Mask mechanism position SW1 input
I Mask mechanism position SW2 input
I Mask mechanism detection input
I FM noise detection input
I S-meter input from F/E
I Data input from the RDS decoder IC
I Quality input from the RDS decoder IC
I F/E IFC OUT input terminal
I
O SRM mechanism submotor control output
I Clock input from the RDS decoder IC
I Request input from changers
I Communication request from LCD driver IC
I Loading SW detection input
I 12cm disc detection SW input
O SRM mechanism submotor control output
I Momentary power down detection input
I Data input from changers
O Data output to changers
I/O Clock input/output with changers
I Data input from the LCD driver IC
O Data output to the LCD driver IC
Clock output to the LCD driver IC
I/O
/Panel detaching detection input(LCD Driver)
O Panel 5V control
Processing Operation
: Reset
Hi: Mute request
Lo: Standby mode, Hi: Operation mode
Hi: POWER ON mode except panel detached
Connected to BU 5V lines.
Connected to GND lines.
Lo: Reset
Lo: Stop mode, Hi: Operation mode
Not used(N.C.)
Lo: Loading, Hi: Eject, Hi-Z: Stop or Break
Hi: CD loading/eject action or Break, Lo: other
Not used(N.C.)
Hi: Chucking, Lo: Pickup most inner position
Lo: Panel detached, momentary power down detected
Not used(N.C.)
Hi: Active, Connected to AVREF terminal
Connected to GND lines.
1V or less: TEL MUTE, 2.5V or greater: NAVI MUTE
Panel: (SW1,SW2,SW3)=(Lo,Lo,Hi)
Angle: (SW1,SW2,SW3)=(Hi,Hi,Lo)
Eject: (SW1,SW2,SW3)=(Hi,Hi,Hi)
Mask : (SW1,SW2,SW3)=(Lo,Lo,Lo)
Lo: Mechanism detected, Hi: mechanism not detected
Except RDS, RBDS model: Not used(pull down to
GND lines)
Except RDS, RBDS model: Not used(pull down to
GND lines)
Lo: Station detected, Hi: Not detected
Not used(pull down to GND lines)
Standby: (SRM+B,SRM-B)=(Lo,Lo)
Clock wise: (SRM+B,SRM-B)=(Hi,Lo)
Counter clock wise: (SRM+B,SRM-B)=(Lo,Hi)
Break: (SRM+B,SRM-B)=(Hi,Hi)
Except RDS, RBDS model: Not used(pull down to
GND lines)
Lo: Request
Lo: Loading start
Lo: 12cm disc detected
Hi : When momentary power down detected or BU OFF
Lo : BU ON
Lo: Panel attached
Hi: Panel attached, Lo: Panel detached