Kenwood KDC-8021, Service Manual

Page: 9 / 27

KDC-8021/M9021/X859
9
MICROCOMPUTER'S TERMINAL DESCRIPTION
Pin Name I/O Purpose Processing Operation
Processing During Processing During
Non-Operation STBY
46 O-CLK I/O
External display CLK Models without external
terminal. display: Output "L".
L L
47 O-CE I/O
External display CE Models without external
terminal. display: Output "L".
L L
48 ILL-ON I/O
FL and ILLUM output
terminal.
ON:H OFF: Hi-Z Hi-Z Hi-Z
49 TYPE0 I
Destination type switching
port.
50 TYPE1 I
Destination type switching
port.
51 TYPE2 I
Destination type switching
port.
52 IC2TYPE0 I
IC2 destination type
terminal.
Default: "L".
53 IC2TYPE1 I
IC2 destination type
terminal.
Default: "L".
54 N.C O Output Open. Not used.
55 N.C O Output Open. Not used.
56 M-MUTE R I
Muting request from CD
mechanism. (R CH)
ON:L
57 M-MUTE L I
Muting request from CD
mechanism. (L CH)
ON:L
58 BVdd -
Positive power supply
terminal.
59 BVss - GND terminal.
Normal: "H". Reset: "L".
60 M-RST O
Reset output According to the
to CD mechanism. mechanism control
H H
specification.
61 M-STOP O
Stop request
to CD mechanism.
STOP: L CD: H L L
62 N.C O Output Open. Not used. L
63 CD-SW3 I
CD Down SW detection
terminal.
Chucking: "H". L
64 LO/EJ I/O
CD mechanism Loading/ Stop, braking: "Hi-Z".
Ejection switching. Loading: "L". Ejection: "H".
Hi-z Hi-Z
65 MOSW O
CD mechanism motor Loading, ejection,
power supply SW. braking: "H".
L L
66 N.C O Output Open. Not used. L
Reset output
Normal: "H". Reset &
Panel attached: "H". Panel attached: "H".
67 PAN-RESET O
to Panel uCOM.
momentary power
Panel detached: "L". Panel detached: "L".
down: "L".
68
MC-REQ/
I/O
REQ terminal to Panel
PANEL uCOM/Panel detection.
Panel attached: "L". Hi-z Hi-Z
69 N.C O Output Open. Not used. L
70 PAN5V I/O Panel 5 V control terminal.
Panel attached: "L". Panel attached: "L".
Panel detached: "Hi-Z". Detached: "Hi-Z".
71 MASK+B O
Mask mechanism
sub-motor output terminal.
L
72 MASK-B O
Mask mechanism
sub-motor output terminal.
L
73 AVCONT O
AD reference voltage Same timing as P-ON.
control output. During operation: "H"
L L
SYSTEM MICROCOMPUTER uPD703033AGF- *** -3BA (X25)