Kenwood CKDC 395 A Service Manual

Page 4

CKDC-395/395A/495

COMPONENTS DESCRIPTION

0 SWITCH UNIT (X16-3370-1x)

Ref. No. Application / Function Operation / Condition
|C3 REMOTE SENSOR
|C4 VFD DRIVER
021 PAN SW5V ON" when the base goes "H.

MICROCOMPUTERS TERMINAL DESCRIPTION

0 SYSTEM u-COM : IC1 on X34- (ELECTRIC UNIT)

Active

Pin No. (H/L) Pin Name l/O Application Processing Operation

1 DC ERR | DC offset detection input

2 LINE MUTE | Phone detection NAVI MUTE : Over 2.5V, TEL MUTE : Below 1V

3 ROTARY CW | Rotary encoder input

4 AVSS -

5 TUN TYPE1 | E-VOL setting switch Refer to TUN TYPE" on the TRUTH TABLE

6 TUN TYPE2 | E-VOL setting switch Refer to TUN TYPE" on the TRUTH TABLE

7 AVREF1 -

8 VFD DATAF | Data input lrom VFD driver

9 VFD DATA3 0 Data output to VFD driver

10 VFD CLK O Clock output to VFD driver

11 L VFD RST 0 Reset output to VFD driver Display OPE Key reset, TDF panel OFF 1L
Display ON, Key scan : H

12 VFD CE 0 Chip enable output to VFD driver

13 ROTARY CCW | Rotary encoder input

14 L TDF DET | TDF panel detection TDF panel OFF : H, TDF panel ON : L

15 PWIC BEEP O Beep output

16~19 NC -
Ad]ustment=H, PS1-1,2=L, PS1-3=Hi-Z,

20 L TUN ADJ | For adjusting |C1D P52-1,2=Hi-Z, TUN DATA, CLK=Hi-Z

21 TUN SD | Tuner search stop output H : Station exists, L : Station does not exist

22~24 NC -

25 AUD SDA I/O Volume + tuner I26 data input and output