Kenwood TK-7185 Service Manual Addendum page 26

TK-7185
Pin No. Name
Serial data input 1. RS-232C level.
2 RXD1 Input voltage range : ±30V max.
L≤0.4V, H≥2.4V, Zi≥5kΩ
Serial data output 1. RS-232C level.
3 TXD1
L≤–5V, H≥5V/3kΩ load, Zo≤2kΩ
AUX input/output 9.
4 AUXI/O9
Active low with 47kΩ pull-up to 5V
5 DI Data signal input. 2.0Vp-p typ.
6 MI2 External MIC input (DC-coupled)
7 GND Ground
8 AUXI/O8 AUX input/output 8. Same as AUXI/O9
Serial data output 2. TTL level.
9 TXD2
L≤0.7V, H≥4.2V/25kΩ load, Zo≤1kΩ
Serial data input 2. TTL level.
10 RXD2 Input voltage range : +5/0V max.
L≤0.8V, H≥4.2V
11 GND Ground
12 AUXI/O7 AUX input/output 7. Same as AUXI/O9
13 AUXI/O6 AUX input/output 6. Same as AUXI/O9
Power output after power switch.
14 SB
DC13.2V±15%, 2.0A max.
AUX output 2. Open collector (500mA max.)
15 AUXO2
(Default none) L≤0.3V
16 AUXO1 AUX output 1. Same as AUXO2
RX fi ltered audio output (DC-coupled).
AF low level output.
17 AFO Wide : 700mVp-p typ.
Narrow : 700mVp-p typ.
(Standard modulation)
18 GND Ground
Detected signal output (DC-coupled).
19 DEO
740mVp-p typ.
20 AUXI/O5 AUX input/output 5. Same as AUXI/O9
21 AUXI/O4 AUX input/output 4. Same as AUXI/O9
22 AUXI/O3 AUX input/output 3. Same as AUXI/O9
23 AUXI/O2 AUX input/output 2. Same as AUXI/O9
24 AUXI/O1 AUX input/output 1. Same as AUXI/O9
25 ME MIC ground
TX-RX unit (X57-6982-72) (B/3)
Pin No. Name
CN301 (to TX-RX unit C/3)
1 REF Reference signal output to the PLL IC
2 Fin Complementary signal output to the PLL IC
3 CPGND Ground
4 5C 5V output
5 GND Ground
26
TERMINAL FUNCTION
Description
Description
Pin No. Name
Signal input from charge pump block in
6 CP
the PLL IC
CN302 (to TX-RX unit C/3)
1 UL Control signal input form the PLL IC
2 PLE Control signal output to the PLL IC
3 DT Control signal output to the PLL IC
4 PCK Control signal output to the PLL IC
5 GND Ground
6 DGND Ground
CN403 (to VGS-1)
VGS busy signal input. Option board I/F 1.
Output : L≤0.45V, H≥4.7V/25kΩ load
1 OPT1
Input : L≤1.0V, H≥4.0V,
Input voltage : 0V~5.0V
VGS playback signal input.
Option board I/F 3.
2 OPT3 Output : L≤0.45V, H≥4.7V/25kΩ load
Input : L≤1.0V, H≥4.0V,
Input voltage : 0V~5.0V
Serial data input. Input : L≤1.0V, H≥4.0V,
3 RXD1
Input voltage : 0V~5.0V
Serial data output / PTT singanl output
4 TXD1 (Scrambler board).
Output : L≤0.45V, H≥4.7V/25kΩ load
5 CLK Serial clock output
VGS enable output. Option board I/F 4.
6 OPT4
Output : L≤0.45V, H≥4.7V/25kΩ load
UART speed select output.
7 USEL
L : 19200bps fi xed
VGS reset signal output.
8 OPT5 Option board I/F 5.
Output : L≤0.45V, H≥4.7V/25kΩ load
9 DGND Ground
10 AGND Ground
VGS audio input. Zin≥10kΩ, 1Vp-p max,
11 AI
Input Voltage : 0V~5.0V
12 AO VGS audio output. Zo≤10kΩ
13 AGND Ground
14 5E 5V power supply output. 78mA max.
15 STON Side tone input. 1kHz, 5Vp-p
Data signal input.
16 DTI
Zin≥22kΩ, 600±200mVp-p
Speaker mute signal input. Input : L≤1.0V,
17 TCTL
H≥4.0V, Input voltage : 0V~5.0V
18 NC No connection
19 AUDIH MIC mute signal input
Option board I/F 2.
Output : L≤0.45V, H≥4.7V/25kΩ
20 OPT2
load Input : L≤1.0V, H≥4.0V,
Input voltage : 0V~5.0V
Description