Kenwood TS-990S Service Manual page 222

TS-990S
Pin No. Name I/O
2 GND -
3 NC -
4 5A I
5 GND -
CN3 (to DC-DC unit A/3 CN180)
1 5B I
2 GND -
CN450 (to DSP unit CN662)
1 MSCPI I
2 GND -
CN451 (to DSP unit CN669)
1 SSCPI I
2 GND -
CN453 (to Accessory (SCOPE) unit A/10 CN36)
1 SCIF I
2 GND -
CN32 (to RX unit A/2 CN28)
1 MAGCV O
2 MIBK O
3 CLK O
4 DATA O
5 PSEDA O
6 PSESI I
7 PSECK O
8 PSEEN O
9 MFSQL I
10 MFSM I
11 MRXC O
12 DAEN1 O
13 PSEN O
14 REN2 O
15 REN1 O
16 NBS O
17 33S O
18 X55V2 I
19 GND -
20 GND -
21 X55V1 I
22 5A O
CN37 (to TX-RX unit A/2 CN1)
1 5A I
2 NC -
3 GND -
222
TERMINAL FUNCTION
Function
GND
No connection
5V (DC/DC)
GND
5V for main MCU circuit
GND
AF input for main audio scope
GND
AF input for sub audio scope
GND
Scope IF input (24kHz)
GND
Automatic gain control voltage
IF blanking
Serial clock
Serial data
EEPROM data output for Accessory
(PRESEL) unit
EEPROM serial data input from Acces-
sory (PRESEL) unit
EEPROM clock for Accessory (PRESEL)
unit
EEPROM enable for Accessory (PRE-
SEL) unit
FM squelch voltage
FM S-meter voltage
RX ON/OFF H: RX ON
D/A IC enable
PRESEL serial/parallel IC enable
Serial/parallel IC4, IC5 enable
Serial/parallel IC2, IC3 enable
NB ON/OFF H: NB ON
3.3V (DC/DC)
PRESEL unit version control
GND
GND
RX unit version control
5V (DC/DC)
5V (DC/DC
No connection
GND
Pin No. Name I/O
4 NC - No connection
5 33S I 3.3V (DC/DC)
Version detection signal
6 X57V I
H: ver.1, L: ver.2
7 VSRM I VSR meter voltage
8 VSFM I VSF meter voltage
9 ID I Drain current signal
10 NC - No connection
11 ALM I ALC meter voltage
12 SFSQL I Sub RX FM squelch voltage
13 SFSM I Sub RX FM S-meter voltage
14 GND - GND
15 DATA O Serial data
16 CLK O Serial clock
17 DAEN2 O D/A converter (IC55) enable signal
18 TEN2 O Shift register (IC53, IC54) enable signal
19 TEN1 O Shift register (IC51, IC52) enable signal
Sub RX ON/OFF control signal
20 SRXC O
H: SRXB (8V) ON
21 CKY O CKY mute signal H: Mute
TX ON/OFF control signal
22 TXC O
H: TXB (8V) ON
23 NC_TR - No connection (Reserved)
Sub RX IF blanking signal
24 SIBK O
H: Sub RX IF mute
SANO- Sub ANO mute control signal
25 O
MU H: Sub ANO mute
MANO- Main ANO mute control signal
26 O
MU H: Main ANO mute
Sub squelch control signal (to ACC2)
27 SSQC O
H: Sub squelch open
Main squelch control signal (to ACC2)
28 MSQC O
H: Main squelch open
29 PKP O Invert PKS control signal H: PTT ON
PTT output for data communication
30 PKSR I
L: PTT ON
31 SS I Standby switch L: TX
KEY jack / PADDLE judgement signal
32 KYSR I
L: When KEY or PADDLE is connected
KEY down signal / Electric keyer dash
33 KEY2 I
signal L: KEY down / KEY dash
KEY down signal/ Electric keyer dot sig-
34 KEY1 I
nal L: KEY down / KEY dot
35 SSMET O Sub RX S-meter voltage
36 MSMET O Main RX S-meter voltage
CN43 (to PLL (MAIN) unit CN1)
1 GND - GND
2 MDEN2 O DDS2 (IC26) enable
External reference input select
3 REFI O
H: External reference input
Function