Kenwood KDC-W8534 Service Manual page 8

KDC-W8534/W8534Y
KDC-X790
MICROCOMPUTER'S TERMINAL DESCRIPTION
Pin No. Pin Name
57 P5V DIS
58 PM CLOSE
59 ROMCOR DET
60 PM DET
61 SC CON
62 NC
63 TUN TYPE1
64 TUN TYPE2
65,66 NC
67 CD DISC12 SW
67 NC
68 CD LOS SW
68 MD_LOS_EJE_SW
69 CD MUTE R
69 NC
70 CD MUTE L
70 MD_MUTE
71 CD MRST
71 MD_MRST
72 CD MSTOP
72 MD_MSTOP
73 CD_DISC8_SW
73 NC
74 CD LOE LIM SW
74 MD_LOE_LIM_SW
75 CD LOEJ
75 MD_LOEJ
76 CD MOTOR
76 MD_MOTOR
77 PON ILLUMI
78 PON CD
78 PON_MD
79 PON
80 PON FL+B
81 PON FDC
82 F SEL1
83 F SEL2
84 DIAG
8
I/O Function
I/O Panel 5V discharge control
I Panel mechanism close detection
I E2PROM write request
I Panel mechanism detection
O Inside-panel communication (Chip enable when flash)
- Not used
I Destination setting 1
I Destination setting 2
- Not used
I 12cm CD detection
O Not used when MD
I CD loading detection
I MD DISC position detection terminal
I CD mute (Rch) request
O Not used when MD
I CD mute (Lch) request
I MD MUTE request terminal
O CD mechanism microcomputer reset
MD mechanism µ-com RST terminal
O
O CD mechanism microcomputer stop
MD mechanism µ-com stop terminal
O
I CD disc detection terminal (8cm) (J only)
- Not used
I CD detection (Chucking SW)
I MD detection terminal (chucking SW)
I/O CD motor control
I/O MD motor control terminal
O CD motor control
O MD motor control terminal
I/O Key illumination power supply control
I/O CD/WMA power supply control
I/O MD servo power supply control terminal
O Power supply control
O Fruorescent indicator tube bias power supply control
I/O Fruorescent indicator tube filament power supply control
O SW-Reg frequency switching
O SW-Reg frequency switching
I/O P-CON excess current surveillance
Processing Operation
H : Discharge, Other : Hi-Z
Refer to Truth Value Table e
H : Write
H : Function check in progress
POWER OFF, ACC OFF : L
TUN TYPE1 : L, TUN TYPE2 : L
Refer to Truth Value Table t
TUN TYPE1 : L, TUN TYPE2 : L
Refer to Truth Value Table t
Output L fixed when MD
L : Rch mute request
Output L fixed when MD
L : Lch mute request
L : MUTE request
L : Reset, H : Normal
H : Normal, L : RESET
L : Mechanism microcomputer stop,
H : Mechanism microcomputer in operation
H : Mechanism µ-com in operation,
L : Mechanism µ-com stop
H : Loading complete, L : No disc
H : Loading completed, L : No disc
Refer to Truth Value Table q
Refer to Truth Value Table q
Refer to Truth Value Table q
Refer to Truth Value Table q
ON : H, OFF : Hi-Z
At time of CD source: H, Other than CD : Hi-Z
H : When MD mechanism in operation,
Hi-Z : When other than MD source
POWER ON : H, POWER OFF : L
POWER ON : H, POWER OFF or display black out : L
POWER ON : L, POWER OFF or display black out : Hi-Z