Kenwood KRC-29Y Service Manual page 5

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MICROCOMPUTER'S TERMINAL DESCRIPTION
(X14-) IC1 : µ -COM
PORT
PORT NAME I/O
No.
41 P.CON-DET
42 CH-CONT
43 -
44 CH-REC H
45-47 -
48 EN2-1
49 EN2-0
50 BEEP
51 EN3
52 EN1
53 SW 5V
54 MUSIC
55 MS-CONT
56 EQ-MUTE
57 FWD/REV
58 SUB+
TE
L 13942296513
59 SUB-
60 RESET
61 REMOTE
62 R-CLK
63 CH-REQ C
64 PACK-IN
65 KEY-REQ
66 -
67 VSS 0
68 VDD 1
69 X2
70 X1
71 IC
72 -
73 XT1
74 VDD 0
75 AVREF 0
76 S-METER
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77 T-MODE
78 PHONE
.
79 NOISE
80 AV CONT
FUNCTION
I P.CON short-circuited detection.
O Changer control.
- -
O Changer request.
- -
O Power supply IC control.
O Power supply IC control.
O Buzzer.
O Power supply IC control.
O Power supply IC control.
O P.ON 5V control.
I Tape signal detection.
O Tape advanced sensitivity control.
O Cassette tape muting.
I Cassette tape running direction detection.
O Sub motor control.
O Sub motor control.
I System reset.
I Remote control.
I RDS clock.
I Changer request.
I Cassette tape pack-in detection.
I Key signal detection.
- -
- GND.
- VDD.
- Main system clock.
I Main system clock.
- -
- -
- VDD.
- VDD.
I Reference voltage.
I SD detection.
I Cassette tape mode detection.
Navi mute : Over 2.5V.
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y
I
Tel mute : less than 2.5V.
i
I Noise detection during FM mode.
O Reference voltage.
KRC-29Y/35R,379R/RY,479R/RY,481R
2 9
8
"H" : OFF.
"H" : Signal does not exist.
"L" : Signal exist.
"H" : Play.
"H" : ON.
"H" : FWD.
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3 6 7 1 3 1 5
"H" : SD exists.
"L" : SD does not exist.
co
.
9 4 2 8
OPERATING CONDITION
"L" : ON.
"L" : FF/REW.
"L" : OFF.
"L" : REV.
0 5 8 2 9 9 4 2 8
m
9 9
9 9
5