Microcomputer's Terminal Description; System Μ-Com : Ic1 On X34- (Electric Unit) - Kenwood KDC-232MR Service Manual

KDC-232MR
Ref. No. Application / Function
Q3 Q4 SW
Q4 ANALOG +8V SW
Q5, 6 CURRENT AMP

MICROCOMPUTER'S TERMINAL DESCRIPTION

SYSTEM µ-COM : IC1 on X34- (ELECTRIC UNIT)
Pin No. Pin Name
1 DCERR
2 LINE MUTE
3 ROTARY CW
4 AVSS
5 TUNER TYPE1
6 TUNER TYPE2
7 AVREF1
8 VFD DATAF
9 VFD DATAS
10 VFD CLK
11 VFD RST
12 VFD CE
13 ROTARY CCW
14 TDF DET
15 PWIC BEEP
16 LX DATA S
17 LX DATA M
18 LX CLK
19 RDS AFSL
20 TUNER ADJ
21 TUNER SD
4
COMPONENTS DESCRIPTION
"ON" When P. ON signal goes "L" (SW+5V is ON).
"ON" When P. ON signal goes "L" (Q3 is ON).
Current driver.
I/O Application
I DC offset error detection input
I Phone detection
I Rotary encoder input
-
I E-VOL setting switching
I E-VOL setting switching
-
I Data input from VFD driver
O Data output to VFD driver
O CLK output to VFD driver
O Reset output to VFD driver
O CE output to VFD driver
I Rotary encoder input
I Panel detection
O Beep output
I Data from slave unit
O Data to slave unit
I/O LX-BUS clock
O Tuner RDS mute output
I For IC10 adjustment
I Tuner search stop input
Operation / Condition
Truth Value
Processing/Operation/Description
Table
TEL mute: 1V or lower
NAVI mute: 2.5V or higher
q
Refer to the truth value table
q
Refer to the truth value table
L: Display off, key reset, panel detached
H: Display on, key scan
H: Panel detached, L: Panel attached
w
Refer to the truth value table
ADJ=H
PS1-1, 2=L PS1-3=Hi-Z, PS2-1, 2=Hi-Z
Tuner data, CLK=Hi-Z
H: Station found, L: Station not found