Alinco DR-235, Service Manual

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No. Terminal Signal
I/O Description
1 P67/AN7
SMT I S-meter input
2 P66/AN6 SQL I
Noise level input for squelch
3 P65/AN5 BAT I
Battery voltage input
4 P64/AN4
TIN I CTCSS tone input / DCS code input
5 P63/SCLK22/AN3
BP1
I Band plan 1
6 P62/SCLK21/AN2 BP2
I Band plan 2
7 P61/SOUT2/AN1 DCSW 0
DCS signal mute
8
P60/SIN2/AN0 RE2 I Rotary encoder input
9
P57/ADT/DA2 TOUT 0
CTCSS tone output / DCS tone output
10 P56/DA1 DOUT 0
DTMF output
11 P55/CNTR1 SCL
0
Serial clock for EEPROM
12 P54/CNTR0 TBST 0
Tone burst output
13 P53/RTP1 BP4
I/O Band plan 4 / lamp dimmer HI / LOW switch
14 P52/RTP0 MUTE
I/O Microphone mute / Security alarm SW
15 P51/PWM1 CLK O Serial clock output for PLL, scramble
16 P50/PWM0 DATA I/O Serial data output for PLL scramble / PLL unlock signal input
17 P47/SRDY1 TSTB
I/O Trunking board detection / Strobe signal to trunking board
18 P46/SCLK1 STB
0 Strobe for PLL IC
19 P45/TXD UTX
0 UART data transmission output
20 P44/RXD
RTX
I UART data reception output
21 P43/n/TOUT BEEP
I/O Beep tone / Band plan 3
22 P42/INT2 SEC
I Security voltage input
23 P41/INT1 RE1
I Rotary encoder input
24 P40 DSQ I Digital squelch input
25 P77 PTT I PTT input
26 P76 SSTB
0 Strobe signal to scramble IC / Security mode
27 P75 W/N
0 Wide Narrow SW
28 P74 T5
0 TX power ON / OFF output
29 P73 R5
0 RX power ON / OFF output
30 P72 SQC
o
SQL ON / OFF
31 P71 C/S
o
Digital scramble ON / OFF
32 P70/INT0 BU
I Backup signal detection input
33 RESET RESET
I Reset input
34 XCIN Xcin
- -
35 XCOUT Xcout
- -
36 XIN Xin
-
Main clock input
37 XOUT Xout
-
Main clock output
38 VSS GND
-
CPU GND
39 P27 PSW
I Power switch input
40 P26 SDA
o
Serial data for EEPROM
41 P25 C5C 0 C5V power ON / OFF output
42 P24 AIR
0 Air band SW / Tx middle power
43
P23 LOW
0 Tx low power
44 P22 EXP
0 Trunking / Packet data SW
45 P21 SW6
I Key sw 6 (SQL)
46 P20 SW5 I Key sw 5 (CALL)
47 P17 SW4
I Key sw 4 (TSQ)
48 P16 SW3 I Key sw 3 (MHz)
49 P15/SEG39 SW2 I Key sw 2 (V/M)
50 P14/SEG38 SW1
Key sw 1 (FUNC)
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