Kenwood TS-990S Service Manual page 225

Pin No. Name I/O
12 SIBK O IF blanking for SRX-DSP H: Mute
13 MIBK O IF blanking for TXMRX-DSP H: Mute
14 SABK2 O AF blanking 2 for SRX-DSP H: Mute
15 SABK1 O AF blanking 1 for SRX-DSP H: Mute
16 MABK2 O AF blanking 2 for TXMRX-DSP H: Mute
17 MABK1 O AF blanking 1 for TXMRX-DSP H: Mute
Automatic gain control voltage form
18 MAGCV I
TXMRX-DSP (to RX unit)
CTCSS detection from TXMRX-DSP
19 MCTDET I
H: Detection
CTCSS detection from SRX-DSP
20 SCTDET I
H: Detection
21 NC - No connection
22 33SD O 3.3V (DC/DC)
23 33SD O 3.3V (DC/DC)
24 NC - No connection
25 DGND - Digital GND
26 DGND - Digital GND
27 GND - GND
28 GND - GND
29 NC - No connection
30 5A O 5V (DC/DC)
31 5A O 5V (DC/DC)
32 NC - No connection
CN73 (to Accessory (SCOPE) unit A/10 CN35)
1 SCPUL I Unlock detection H: LOCK
2 SCDEN3 O DDS3 (IC3) enable signal
3 SCDEN2 O DDS2 (IC2) enable signal
4 SCDEN1 O DDS1 (IC1) enable signal
5 SCPEN2 O PLL2 (IC6) enable signal
6 SCPEN1 O PLL1 (IC4) enable signal
7 SCPDT O Serial data
8 SCPCK O Serial clock
9 SCATT3 O Attenuator 3 control
10 SCATT2 O Attenuator 2 control
11 SCATT1 O Attenuator 1 control
12 SCATT0 O Attenuator 0 control
13 IFSEL4 O IF select 4
14 IFSEL3 O IF select 3
15 IFSEL2 O IF select 2
16 IFSEL1 O IF select 1
Version detection signal
17 X42V1 I
H: ver.1, L: ver.2
18 33SD O 3.3V (DC/DC)
19 NC - No connection
20 5A O 5V (DC/DC)
21 NC - No connection
TERMINAL FUNCTION
Function Pin No. Name I/O
22 GND - GND
23 NC - No connection
24 8A I 8V (DC/DC)
DSP unit (X53-4530-00)
Pin No. Name I/O
CN1 (to DC-DC unit A/3 CN190)
1 14AF I Switched 14V for AF power amplifi er
2 GND - Power amplifi er GND
CN2 (to Control unit CN1)
1 14SD I Non-switched 14V for switching regulator
2 NC - No connection
3 GND - Switching regulator GND
CN50 (to DC-DC unit A/3 CN210)
1 SP O AF output for internal speaker
2 SPG - Speaker GND
CN101 (to Control unit CN72)
1 NC - No connection
2 5A I 5V (DC/DC)
3 5A I 5V (DC/DC)
4 NC - No connection
5 GND - GND
6 GND - GND
7 DGND - Digital GND
8 DGND - Digital GND
9 NC - No connection
10 33SD I 3.3V (DC/DC)
11 33SD I 3.3V (DC/DC)
12 NC - No connection
CTCSS detection from SRX-DSP
13 SCTDET O
H: Detection
CTCSS detection from TXMRX-DSP
14 MCTDET O
H: Detection
Automatic gain control voltage form
15 MAGCV O
TXMRX-DSP
16 MABK1 I AF blanking for TXMRX-DSP H: Mute
17 MABK2 I AF blanking for TXMRX-DSP H: Mute
18 SABK1 I AF blanking for SRX-DSP H: Mute
19 SABK2 I AF blanking for SRX-DSP H: Mute
20 MIBK I IF blanking for TXMRX-DSP H: Mute
21 SIBK I IF blanking for SRX-DSP H: Mute
Power down for switching regulator IC
22 14SW I
H: Power ON
23 TXC I TX ON/OFF H: TX ON
24 CKY I RF power ON/OFF H: RF power ON
TS-990S
Function
Function
225