Service Manual Part 1

+8/  
  
3 "" .)(2 (()2  5 +( +.1)(2
The following table shows the BCD codes for T2010 and T2015 radios under external
channel control.
 T2010 has 4 channels accessible by BCD and T2015 has 24 channels accessible by
BCD
* Refer to BCD selection table.
Connection
Pin
No.
Function
Logic
Levels
Logic
Sense
Sink
I
max
Source
I
max
Z
in
BUSY S14-3 carrier detect
opening time: <35ms
closing time: <20ms
(8dB sinad, 6dB margin)
0V 5V 0V = busy 0.5mA 0.1mA
RX-GATE S14-4 Rx audio gate information 5V CMOS 5V = audio 1.5mA 0.3mA
/PTT-TO-OPT S14-5 from mic.; linked to 18 pull-up 0V = Tx 1.5mA 50µA 2k7
/PTT-FRM-OPT S14-6 Tx 5V CMOS 0V = Tx CMOS
/IN-LOCK S14-7 synthesiser lock detect
(lock-up time: <20ms)
0V 5V 0V = lock 0.2mA 0.2mA
MIC-MUTE S14-8 disables AF from mic. only 5V CMOS 5V = mute 200k
/SIG-SQLCH S14-9 Rx audio gate control open c. 0V = AF muted 47k
/EMERGNCY S14-10 starts s/w sequence open c. 0V = emergency 10k
CALL-SW S14-11 front panel control 5V CMOS 1.5mA 0.3mA
HUSH S14-12 car radio mute output 5V CMOS 1.5mA 0.3mA
AUX-ON/OFF S14-13 front panel control 5V CMOS 1.5mA 0.3mA
HORN S14-14 Selcall horn alert 5V CMOS 1.5mA 0.3mA
RSSI S14-15 Rx signal strength 0 - 50µA 0.8µA/dB
EXTERNAL S14-16 line to power plug
BCD0
BCD1
BCD2
BCD3
BCD4
BCD5
S15-9
S15-10
S15-11
S15-12
S15-13
S15-13
channel change option
on T201X
*
0 - 5V CMOS 0V = 0
5V = 1
10k
BCD Channel Number Codes
BCD
Number
Channel
Number
BCD-5 BCD-4 BCD-3 BCD-2 BCD-1 BCD-0
000000 0 1
000001 1 2
000010 2 3
000011 3 4
000100 4 5
000101 5 6