4
KDC-2031SA/2031SAY
KDC-2031SG/2031SGY
Ref. No. Application / Function Operation / Condition
Q3 Q4 SW “ON” When P. ON signal goes “L” (SW+5V is ON).
Q4 ANALOG +8V SW “ON” When P. ON signal goes “L” (Q3 is ON).
Q5, 6 CURRENT AMP Current driver.
● SWITCH UNIT (X16-294x-xx)
Ref. No. Application / Function Operation / Condition
IC1 VFD DRIVER
IC3 REMOTE SENSOR
Q1 GREEN LED SW “ON” when the base goes “H”.
Q2 RED LED SW “ON” when the base goes “H”.
Q21 PAN SW5V “ON” when the base goes “H”.
COMPONENTS DESCRIPTION
● SYSTEM µ-COM : IC1 on X34- (ELECTRIC UNIT)
Pin No.
Active
Pin Name I/O Application Processing Operation
(H/L)
1 DC ERR I DC offset detection input
2 LINE MUTE I Phone detection NAVI MUTE : Over 2.5V, TEL MUTE : Below 1V
3ROTARY CW I Rotary encoder input
4AVSS -
5 TUN TYPE1 I E-VOL setting switch Refer to “TUN TYPE” on the TRUTH TABLE
6 TUN TYPE2 I E-VOL setting switch Refer to “TUN TYPE” on the TRUTH TABLE
7AVREF1 -
8 VFD DATAF I Data input from VFD driver
9 VFD DATAS O Data output to VFD driver
10 VFD CLK O Clock output to VFD driver
11 L VFD RST O Reset output to VFD driver
Display OFF, Key reset, TDF panel OFF : L
Display ON, Key scan : H
12 VFD CE O Chip enable output to VFD driver
13 ROTARY CCW I Rotary encoder input
14 L TDF DET I TDF panel detection TDF panel OFF : H, TDF panel ON : L
15 PWIC BEEP O Beep output
16~19 NC -
20 L TUN ADJ I For adjusting IC10
Adjustment=H, PS1-1,2=L, PS1-3=Hi-Z,
PS2-1,2=Hi-Z, TUN DATA, CLK=Hi-Z
21 TUN SD I Tuner search stop output H : Station exists, L : Station does not exist
MICROCOMPUTER’S TERMINAL DESCRIPTION
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
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Power
Frequency and Sensitivity
Weight and Dimensions
