Kenwood KRC-594 Service Manual page 6

KRC-594/V/Y/YV
MICROCOMPUTER'S TERMINAL DESCRIPTION
Pin No. Name
47 PLL CLK
48 NC
49 NC
50 NC
51 PANEL 5V
52 NC
53 NC
54 VOL A
55 VOL B
56 DSI
57 NC
58 FILP-DET
59 L CE
60 NC
61 TYPE0
62 TYPE1
63 TYPE2
64 NC
65 ST TYPE0
66 ST TYPE1
67 NC
68 NC
69 NC
70 MODE1
71 MODE2
72 MODE3
73 MOTOR
74 SUB+
75 SUB-
76 R QUAL
76 NC
77 R DATA
77 NC
78 LX-MUTE
79 LX-CON
80 LX-REQM
81 LX-RST
82 MUTE
83 AFS
84 IC2 SDA
85 IC2 SCL
86 P-MUTE
87 P-STBY
88 SVR
89 ACC-DET
90 PCON-DET
91 PANT-DET
92 MS MODE
6
Module I/O Description
TUNER I/O Tuner I2C SCL
O
O
O
to PANEL I/O Panel 5V ON/OFF
O
O
to PANEL I Rotary encorder input
to PANEL I Rotary encorder input
to PANEL O Eject key illumination, guide illumination, DSI control Light on :L, Light off :H
O
to PANEL I 14seg retractable detection
to PANEL O LCD driver CE
O
EXTRA I Destination setting
EXTRA I Destination setting
EXTRA I Destination setting
O
EXTRA I for OEM
EXTRA I for OEM
O
O
O
TAPE I Cassette mechanism mode detection
TAPE I Cassette mechanism mode detection
TAPE I Cassette mechanism mode detection
TAPE O Cassette mechanism main motor
TAPE O Cassette mechanism sub motor
TAPE O Cassette mechanism sub motor
TUNER I RDS quality
O When with no RDS, output L fixed
TUNER I RDS data
O When with no RDS, output L fixed
LX I Mute request from CH
LX O Control output to CH
LX O Request output to CH
LX O Reset for CH
AUDIO O Mute
TUNER O Noise detection time constant switching terminal FM seek during AF search :L,
AUDIO I/O SDA for EVOL
AUDIO I/O SCL for EVOL
AUDIO O Power IC Mute output terminal
AUDIO O Power IC standby output terminal
AUDIO O Power IC servo control terminal
Power supply I ACC detection
EXTRA I PCON output detection
EXTRA I PANT output detection
TAPE O Tape between music detection switching
Processing Operation
Attached the panel, ACC ON :L (Refer to "Truth table 5")
Refer to timing chart
Refer to timing chart
Refer to "Trush table 4"
Refer to "Trush table 4"
Refer to "Trush table 4"
Refer to "Trush table 4"
Refer to "Trush table 4"
Refer to "Trush table 1"
Refer to "Trush table 1"
Refer to "Trush table 1"
Motor active :H, Motor stop :L
Refer to "Trush table 2"
Refer to "Trush table 2"
H:MUTE ON L:MUTE OFF
ON:H OFF:L
Request detection :L
Usually, L after system RST returned, after more than 400msec H, and L
during receiving :H
When power off :L all off :L tel mute :L
When power IC on :H off :L
momentary power down :H
ACC detection :L with no ACC :H
PCON detection :L
PANT detection :L
with no PANT :output L fixed
While tape play :H
While tape FF/REW, mode except tape :L