Kenwood TH-D74E Service Manual page 19

Pin No. Name I/O
19 BD11 I/O LCD driver bus data output
20 BD10 I/O LCD driver bus data output
21 BD09 I/O LCD driver bus data output
22 BD08 I/O LCD driver bus data output
23 BD07 I/O LCD driver bus data output
24 BD06 I/O LCD driver bus data output
25 BD05 I/O LCD driver bus data output
26 BD04 I/O LCD driver bus data output
27 BD03 I/O LCD driver bus data output
28 BD02 I/O LCD driver bus data output
29 BD01 I/O LCD driver bus data output
30 BD00 I/O LCD driver bus data output
31 CABC - NC
32 IOVCC O 1.8V power supply
33 IOVCC O 1.8V power supply
34 VSSD - digital GND
35 VSSD - digital GND
CN705(to KEY)
1 LAMP B O LAMP B
2 NC - NC
3 LAMP GND - LAMP GND
4 SP- I SP GND
5 SP+ O SP AF
6 LAMP GND - LAMP GND
7 KEY_I0 I key matrix
8 KEY_I1 I key matrix
9 KEY_I2 I key matrix
10 KEY_I3 I key matrix
11 KEY_I4 I key matrix
12 KEY_O0 O key matrix
13 KEY_O1 O key matrix
14 KEY_O2 O key matrix
15 KEY_O3 O key matrix
16 KEY_O4 O key matrix
CN706(to TX-RX)
1 +B I +B power supply
2 DET1 I power detect signal
3 +B I +B power supply
4 DET2 - No use
5 TCXO VCOM O Modulation signal for TCXO
6 CURR I Final current detection voltage
7 40C I 40C power supply
8 SQA I Band A squelch voltage signal
9 40C I 40C power supply
10 GND - GND
11 RAINT O Interrupt signal for radio
Function Pin No.
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
1
2
3
Name I/O
BPFA O Band A BPF adjustment signal
47C I 47C power supply
AFA I Band A audio signal
AGCB O Band B AGC signal
SMA I Band A RSSI voltage signal
IFB I Band B SSB/CW/AM/IF signal
LDA I Band A lock detect signal
AFB_FM I Band B D-star/FM audio signal
PRHOTB I Processor hot signal
SQB I Band B squelch voltage signal
PMO I Voltage output signal for charge
SMB I Band B RSSI voltage signal
LDB I Band B lock detect signal
I2CCK O I2C CLK signal for charge IC
/RST_R I RESET signal for radio IC
I2CDT I/O I2C DATA signal for charge IC
GND - GND
I2CCKR I I2C CLK signal for radio IC
GND - GND
I2CDTR I/O I2C DATA signal for radio IC
GND - GND
SCPU_TXD O UART for SUB MPU
BFMS I Band B switch signal for
power supply(76-108MHz)
SCPU_RXD I UART for SUB MPU
VINOK I VINOK signal
/S_RST O RESET signal for SUB MPU
BAT_DET I Battery S terminal detect signal
40CS O 40C switch signal
VDCIN I Detection signal for
DC IN voltage
33SS O 33S switch signal
POSWO O Power switch output signal
Freq I TCXO Frequency
adjustment signal
AGCA/APC O Band A AGC signal
& APC signal
VCOMOD O Modulation signal for VCO
VBAT I Battery voltage detect signal
BPFB O Band B BPF adjustment signal
NC - NC
33RAD I 33RAD power supply
+B1 I +B power supply
CN707(to encoder)
GND - GND
Vol_O O Volume signal
Vol_I I Power supply for volume
(No.RA044<Rev.001>)1-19
Function