Kenwood DPX501 Service Manual page 7

MICROCOMPUTER'S TERMINAL DESCRIPTION
Pin No. Pin Name I/O
34 ROMCOR SCL I/O
35 PON PANEL I/O
36 DSI I/O
37,38 NC
39 EPM
40 PANEL DET
41 NC
42 ROMCOR DET
43 PON FL
44 VFD CS
45 ROTARY CW
46 ROTARY CCW
47 CD DISC12 SW
48 CD LOS SW
49 CD MUTE R
50 CD MUTE L
51 CD MRST
52 CD MSTOP
53 CD DISC8 SW
54 CD LOE LIM SW
55 CD LOEJ I/O
56 CD MOTOR
57 PON ILLUMI I/O
58 PON CD
59 PON
60 VCC2
61 EXT AMP CON I/O
62 VSS
63~65 TYPE 1~3
66 TUN TYPE1
67 TUN TYPE2
68 OEM DISP DATA I/O
Application
E2PROM I2C clock output for
ROM correction
Panel 5V control
(Flip-down panel model only)
DSI/EJECT LED control
(Flip-down panel model only)
- Not used
I Flash EPM input
I Panel detection (Flip-down panel model only)
- Not used
I E2PROM writing request
O FL+B control
O VFD chip select control
I VOL key input
I VOL key input
I 12cm CD detection
I CD loading detection
I Rch CD mute request
I Lch CD mute request
CD mecha µ-COM reset
O
CD mechanism µ-COM stop
O
I 8cm CD detection (Not used)
I CD detection (Chucking SW)
CD motor control
O CD motor control
Key illumination power supply control
O Power supply control for CD-WMA
O Power supply
-
EXTERNAL AMP control
-
I Destination switching
I Destination setting 1
I Destination setting 2
External display data
(Destination K and E only)
DPX501/501U/501UY
DPX-MP2090U
Truth
Processing Operation Description
Value Table
L: ON
Hi-Z: Momentary power down, panel detached or 11
minutes after ACC OFF
OFF: Hi-z, Pulse drive: Panel detached
H: Illumination ON or panel opened (POWER ON)
L fixed
L: Panel detached, H: Panel attached
L fixed
H: Writing
H: FL+B ON, L: FL+B OFF
Detects pulse width
Detects pulse width
H: Normal, L: Requesting Rch mute
H: Normal, L: Requesting Rch mute
H: Normal, L: Reset
H: Mecha µ-COM operates, L: Mecha µ-COM stops
H: Loading completes, L: No disc
w
Refer to the truth value table
w
Refer to the truth value table
H: ON, Hi-Z: OFF
L: POWER ON, H: POWER OFF
L: Before M-STOP with reset
H: POWER ON, L: POWER OFF
e
Refer to the truth value table
r
Refer to the truth value table
r
Refer to the truth value table
External display
7