Kenwood KDC-MP638U Service Manual page 7

MICROCOMPUTER'S TERMINAL DESCRIPTION
Pin No. Pin Name I/O
36 PON_ILL I/O
37 NC O
38 PON_PANEL I/O
39 ROMCOR_DET I
39 EPM I
40 CD_MOTOR O
41 CD_LOE_LIM_SW I
42 CD_LOS_SW I
43 CD_DISC12_SW I
44 PAN_SC_CON O
45 CD_LOEJ I/O CD motor control terminal
46 S_SOC_REQ I
47 SOC_STOP O
48 SOC_RST O
49 S_SYS_REQ O
50 SOC_MUTE I
51 PON_D5V I/O
52 PON I/O Power supply control terminal
53 OEM_DISP_DATA I/O External display DATA
53 NC O
54 OEM_DISP_CLK I/O External display CLK
54 NC O
55 OEM_DISP_CE I/O External display control request
55 NC O
56 P_CON I/O PCON control terminal
57 ANT_CON O
58 NC O
59 ILLUMI_DET I
60 VCC2
61 MUTE_0 O
62 VSS
63 MUTE_1 O
Application
Panel LED
FL fi lament power supply
FL bias power supply control
Not used
Power supply for panel μ-com
Required for panel authentication
ROM correction writing-in request
EPM input terminal for re-writing ROM. ROM is
re-writable when the input is "L" at the boot up.
CD motor control terminal
CD detection terminal (Chucking detection)
CD loading detection terminal
CD disc detection terminal (12cm)
Panel operation control terminal
CE when the system μ-com is re-written
SOC → System μ-com communication request
SOC stop terminal
SOC reset terminal
System μ-com → SOC communication request
SOC mute request
5V power supply control terminal for FL fi lament,
panel, and USB.
Not used (Model without OEM_DISP)
Not used (Model without OEM_DISP)
Not used (Model without OEM_DISP)
ANTCON control terminal
Not used
Dimmer illumi detection
IC-2 FRONT MUTE control
IC-2 REAR MUTE control
KDC-MP638U/W7041U
/W7141UY/X692/X7009U
Truth
Processing / Operation / Description
Value Table
H: ON, Hi-Z: OFF
Turned OFF when the display is black out.
Turned OFF when panel is dismounted/opened.
Output L fi xed
H: ON, Hi-Z: OFF
Turn OFF when panel is dismounted/opened or
when power is off.
H: Can re-write ROM (ROM correction)(I2C is open)
w Refer to the truth value table
H: Loading completed, L: No disc is found.
L: Ejection completed.
L: 12cm disc
H: In normal condition, L: Stop the panel.
w Refer to the truth value table
H: Normal, L: Stop SOC.
H: Normal, L: Reset
L: MUTE request, H: In normal condition
H: ON, Hi-Z: OFF
H: ON, Hi-Z: OFF
External display
Output L fi xed
External display
Output L fi xed
External display
Output L fi xed
POWER ON: H, POWER OFF: Hi-Z
STBY source: Hi-Z
TUNER source: H, POWER OFF: L
STBY source: L
Output L fi xed
L: ON, H: OFF
L: Mute ON, Independent setup of time
constant 10ms, H: In normal condition
L: Mute ON, Independent setup of time
constant 10ms, H: In normal condition
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