Icom IC-7610 Service Manual page 10

● REAR panel (2)
[ACC 1]
• 8-pin
[ACC 2]
• 7-pin
[ACC 1]/[ACC 2]
PIN
ACC 1 NAME
No.
1 RTTY
2 GND
3 SEND*
8-pin
2
4 5
1 3
8
4 MOD
6 7
AF/IF
Rear panel
5
(IF=12 kHz)*
view
6 SQL S
7 13.8 V
8 ALC
PIN
ACC 2 NAME
No.
1 8 V
2 GND
7-pin
3 SEND*
2
4 5
1 3
4 BAND
6
7
Rear panel
5 ALC
view
6 TRV
7 13.8 V
* When the SEND terminal controls an inductive load,
1
such as a relay, a counter-electromotive force can
malfunction or damage the transceiver. To prevent this,
we recommend adding a switching diode, such as an
1SS133, on the load side of the circuit to absorb the
counter-electromotive force. When the diode is added, a
delay in relay switching may occur. Be sure to check its
switching action before operating.
(Example) ACC 1/2 socket
e SEND
u 13.8 V
Relay
Switching diode
DESCRIPTION
Controls RTTY keying.
Connects to ground.
An external unit controls
the transceiver. When
Input/output pin.
Connected in this pin goes to ground,
1
parallel with ACC the transceiver transmits.
2 pin 3. The pin goes low when
the transceiver transmits.
Modulator input.
Connects to the internal modulator circuit.
Fixed AF detector or receive IF (12 kHz)
signal output.
3
Squelch output.
Grounded when the squelch opens.
13.8 V output when power is ON.
Connected in parallel with ACC 2 pin 7.
ALC voltage input.
Connected in parallel with ACC 2 pin 5.
DESCRIPTION
Regulated 8 V output.
Connects to ground.
Same as ACC 1 pin 3.
1
Band voltage output.
(Varies with the selected amateur band)
Same as ACC 1 pin 8.
Activates [X-VERTER] input/output when
"HIGH" voltage is applied.
Same as ACC 1 pin 7.
To a non-Icom
linear amplifier
High level:
Low level:
Output current:
Connected in parallel with ACC 2 pin 2.
Input voltage (RX): 2.0~20.0 V
Input voltage (TX): –0.5~+0.8 V
Current flow:
Output voltage (TX): Less than 0.1 V
Current flow:
Input impedance:
Output level:
Output impedance: 4.7 kΩ
Output level:
SQL open:
SQL closed:
Output current:
Input level:
Input impedance:
Output voltage:
Output current:
Connected in parallel with ACC 1 pin 2.
Input voltage (RX): 2.0~20.0 V
Input voltage (TX): –0.5~+0.8 V
Current flow:
Output voltage:
Input level:
Input impedance:
Input impedance:
Input voltage:
Output current:
* The MOD input level is adjustable in the MENU. 100 mV
2
rms is at 50% as the default.
MENU » SET > Connectors > ACC MOD Level
* The AF/IF (IF=12 kHz) settings are selectable to output
3
a 12 kHz IF signal in the MENU. In that case, you can
listen to the DRM broadcast with the application software
receiver that is installed onto your PC.
MENU » SET > Connectors > ACC Output Select
MENU » SET > Connectors > USB Output Select
MENU » SET > Connectors > LAN Output Select
* The AF/IF (IF=12 kHz) output level is adjustable in the
4
MENU. Approximately 200 mV rms is at the 50% as the
default.
MENU » SET > Connectors > ACC IF Output Level
MENU » SET > Connectors > USB IF Output Level
3-3
SPECIFICATIONS
More than 2.4 V
Less than 0.6 V
Less than 2 mA
Maximum 20 mA
Maximum 200 mA
10 kΩ
Approx. 100 mV rms*
100~300 mV rms*
4
Less than 0.3 V/5 mA
More than 6.0 V/100 μA
Maximum 1A
–4~0 V
More than 10 kΩ
SPECIFICATIONS
8 V ±0.3 V
Less than 10 mA
Maximum 20 mA
0~8.0 V
–4~0 V
More than 10 kΩ
More than 10 kΩ
2~13.8 V
Maximum 1A
2