Kenwood TS-990S Service Manual page 234

TS-990S
Pin No. Name I/O
3 8A O
4 8A O
5 X55V2
6 GND -
7 GND -
8 PSEL O
9 PSEN O
10 PSEEN O
11 PSECK O
12 PSESI I
13 PSEDA O
14 DATA O
15 CLK O
16 33S O
CN80 (to RX unit A/2 CN81)
1 NB O
CN81 (to RX unit A/2 CN80)
1 NB I
CN89 (to PLL (MAIN) unit CN22)
1 MLO1 I
CN104 (to PLL (MAIN) unit CN21)
1 MLO2 I
CN109 (to Accessory (SCOPE) unit A/10 CN2)
1 SC08M O
CN137 (to DSP unit CN665)
1 MRIF O
2 GND -
RX (BPF) unit (X55-313X-XX B/2)
Pin No. Name I/O
CN501 (to RX unit A/2 CN11)
1 BPFI I
CN520 (to RX unit A/2 CN22)
1 NRLY I
2 MBPF3 I
3 MBPF4 I
4 MBPF5 I
5 MBPF6 I
6 MBPF7 I
7 MBPF8 I
8 MBPF9 I
9 MBPF10 I
10 MBPF11 I
11 MBPF12 I
12 MBPF13 I
234
TERMINAL FUNCTION
Function
8V (DC/DC)
8V (DC/DC)
PRESEL unit version control
GND
GND
PRESEL ON
PRESEL serial/parallel IC enable
EEPROM enable
EEPROM clock
EEPROM serial data input
EEPROM data ouput
Serial data
Serial clock
3.3V (DC/DC)
NB IF output (Coaxial)
NB IF input (Coaxial)
1st local signal (Coaxial)
2nd local signal (Coaxial)
Scope signal output (Coaxial)
RX IF output
GND
Function
BPF input (Coaxial)
Diode SW BPF block ON
BPF3 (1.705~2.5MHz) ON
BPF4 (2.5~4.1MHz) ON
BPF5 (4.1~6MHz) ON
BPF6 (6~7.5MHz) ON
BPF7 (7.5~10.5MHz) ON
BPF8 (10.5~14.5MHz) ON
BPF9 (14.5~18.5MHz) ON
BPF10 (18.5~21.5MHz) ON
BPF11 (21.5~26.5MHz) ON
BPF12 (26.5~35MHz) ON
BPF13 (40~46.5MHz) ON
Pin No. Name I/O
13 MBPF14 I BPF14 (46.5~60MHz) ON
14 NC - No connection
15 8A I 8V (DC/DC)
16 NC No connection
17 RX14 I Switched 14V
18 NC - No connection
19 GND - GND
20 GND - GND
21 NC - No connection
22 14S I 13.8V (DC/DC)
CN534 (to RX unit A/2 CN13)
1 BPFO O BPF output (Coaxial)
TX-RX unit (X57-827X-XX A/2)
Pin No. Name I/O
CN1 (to Control unit CN37)
1 MSMET I Main RX S-meter voltage
2 SSMET I Sub RX S-meter voltage
KEY down signal / Electric keyer dot
3 KEY1 O
signal
KEY down signal / Electric keyer dash
4 KEY2 O
signal
5 KYSR O KEY jack / PADDLE judgement signal
6 SS O Standby switch
7 PKSR O PTT output for data communication
8 PKP I Invert PKS control signal
9 MSQC I Main squelch control signal (to ACC2)
10 SSQC I Sub squelch control signal (to ACC2)
MANO-
11 I Main ANO mute control signal
MU
SANO-
12 I Sub ANO mute control signal
MU
13 SIBK I Sub RX IF blanking signal
14 NC_TR - No connection (reserved)
15 TXC I TX ON/OFF control signal
16 CKY I CKY mute signal
17 SRXC I Sub RX ON/OFF control signal
18 TEN1 I Shift register (IC51, IC52) enable signal
19 TEN2 I Shift register (IC53, IC54) enable signal
20 DAEN2 I D/A converter (IC55) enable signal
21 CLK I Serial clock
22 DATA I Serial data
23 GND - GND
24 SFSM O Sub RX FM S-meter voltage
25 SFSQL O Sub RX FM squelch voltage
26 ALM O ALC meter voltage
Function
Function