SUPPLIED ACCESSORIES

The transceiver comes with the following accessories. Qty. q DC power cable.. 1 w Hand microphone (HM-36).. 1 e Fuse (FGB 20 A; for DC cable).. 1 r Fuse (FGB 4 A; internal use). 1

q w e r

PANEL DESCRIPTION

s Front panel

Speaker Function Display @1 @0 !9 !8 !7

!6 !5 !4 !3 !2

q POWER SWITCH [PWR] Push momentarily to turn power ON.
Turn the optional DC power supply ON in advance.
Push for 1 sec. to turn power OFF. While pushing and holding [SET], push [PWR] to enter the initial set mode. (p. 28) w MICROPHONE CONNECTOR [MIC] Accepts supplied or optional microphone. See p. 45 for appropriate microphones. See p. 7 for microphone connector information. e HEADPHONE JACK [PHONES] (p. 11) Accepts headphones. When headphones are connected, the internal speaker or connected external speaker does not function. r AF CONTROL [AF] (inner control) Varies the audio output level from the speaker. t RF GAIN/SQUELCH CONTROL [RF/SQL] (outer control; pgs. 15, 31) Adjusts the squelch threshold level. The squelch removes noise output from the speaker (closed condition) when no signal is received. The squelch is available for all modes. The control can be set as the squelch plus RF gain controls or squelch control only (RF gain is xed at maximum) in initial set mode. y RIT CONTROL [RIT] (inner control; p. 19) Shifts the receive frequency 1.2 kHz for clear reception of an off frequency signal. Rotate the control clockwise to increase the frequency, or rotate the control counterclockwise to decrease the frequency. appears on the display.
u IF SHIFT CONTROLS [SHIFT] (outer control; p. 20) Shifts the center frequency of the receivers IF passband. Rotate the control clockwise to shift the center frequency higher, or rotate the control counterclockwise to shift the center frequency lower. i LOCK SWITCH [LOCK] (p. 14) Push momentarily to turn the dial lock function ON and OFF. The dial lock function electronically locks the channel selector. o CHANNEL SELECTOR Selects an operating channel, sets conditions in the quick/initial set mode items, etc. !0 PREAMP SWITCH [P.AMP] (p. 19) Push to turn the preamp ON or OFF. !1 FC SWITCH [CH] Push to change the indication, channel comment or stored frequency. (p. 14) This key action only for some versions. Push for 1 sec. to entering into VFO mode. (p. 35) !2 MEMORY CHANNEL UP/DOWN SWITCHES [ DN]/[UP ] Push to select the operating channel. (p. 13) Push for 1 sec. to start scanning. (p. 14) Push to select the quick/initial set mode items while quick/initial set mode is selected. (p. 28) Push to select the digit of channel comment while editing. (p. 27)

!3 ATTENUATOR SWITCH [ATT] (p. 19) Push to turn the 20 dB attenuator function ON and OFF. !4 TUNER SWITCH [TUNER] (p. 18) Push to turn the antenna tuner function ON and OFF. Push for 1 sec. to manually tune the tuner. An optional antenna tuner must be connected. When the tuner cannot tune the antenna, the tuning circuit is bypassed automatically after 20 sec. !5 SET SWITCH [SET] Push for 1 sec. to enter the quick set mode. (p. 28) Push and hold [SET], then push [PWR] to enter the initial set mode. (p. 28) Push to change the meter function; (p. 16) PO: indicates the relative RF output power. ALC: Indicates ALC level. SWR: Indicates the SWR over the transmission line. !6 MIC COMPRESSOR SWITCH [COMP] (p. 17) Turn the Mic. compressor function ON and OFF. !7 KEYPAD The keypad can be used for several functions as described below: [0] to [9] For entering operating channel number. (p. 13) Selects a character during channel comment programming. (p. 27) [ENT] Direct channel number input. (p. 13) [TXF] Transmit frequency indication. (p.14) Selects a space and changes the editing digit during channel comment programming. (p. 27) !8 NOISE BLANKER SWITCH [NB] (p. 19) Turns the noise blanker ON and OFF. The noise blanker reduces pulse-type noise such as that generated by automobile ignition systems. This function is not effective against non pulse-type noise. Push [NB] for 1 sec. to enter the noise blanker level setting condition. !9 TONE SWITCH [TONE] This key action may differ according to version. Selects the call channel and emits a distress alarm tone from the speaker. (p. 36) Transmits a distress alarm or alarm testing signal when pushed for 1 sec. (p. 36) Cancel the distress alarm tone emission, or distress alarm transmission. Selects the tuning step item in the quick set mode directly. No function is assigned.
@0 CALL SWITCH [CALL] Push to select call channel. Push again to return to previous condition. @1 MODE SWITCH [MODE] (p. 15) Push to change an operating mode. Push [MODE] for 1 sec. during SSB mode to switch between LSB or USB. Push [MODE] for 1 sec. during CW or RTTY mode, to switch between CW and CW reverse or RTTY and RTTY reverse. appears on the display.

s Function display

!6 q w e r t y !5 !4

!3 !2 !1 !0

q LOCK INDICATOR (p. 14) Appears when the dial lock function is in use. w RECEIVE INDICATOR Appears while receiving a signal or when the squelch is open. e TUNE INDICATOR Appears or disappears when the connected automatic tuner is tuned completely, depending on connected antenna tuner type. Flashes while tuning. r TRANSMIT INDICATOR Appears while transmitting. Flashes while transmit frequency is indicated. t ALARM INDICATOR This indicator appears only some versions. Appears while 2-tone alarm is emitting or transmitting y FUNCTION INDICATORS P.AMP appears when preamp is activated. ATT appears when the RF attenuator is activated. NB appears when the Noise Blanker is activated. BK appears when the semi break-in function is selected in quick set mode. F-BK appears when the full break-in function activates in CW mode. (p. 23) VOX appears when the VOX function is selected in quick set mode. COM appears when the speech compressor activates in SSB mode. SCAN appears during scanning. Flashes when scan is paused. u SIGNAL/SQL/RF-GAIN METER Functions as an S-meter while receiving. Functions as a Power, ALC or SWR meter while transmitting. (p. 16)

i VFO/MEMORY INDICATOR MEMO appears during regular operation. This indicator appears only some versions. VFO appears during VFO operation. o CHANNEL NUMBER READOUT (p. 13) Shows the selected channel number. !0 BLANK INDICATOR Appears when no frequency programmed channel is selected. !1 SPLIT INDICATORS (p. 13) Appears when the duplex channel, in which different frequencies between transmit and receive are programmed, is selected. !2 RIT INDICATOR (p. 19) Appears when the RIT function is in use. !3 CHANNEL READOUT Shows the memory names, or stored frequency of the selected channel. !4 REVERSE INDICATOR (p. 15) Appears when the CW reverse or RTTY reverse mode is selected. !5 WIDE/NARROW FILTER INDICATORS (pgs. 21, 22) appears when the wide IF lter is selected. appears when the narrow IF filter is selected. !6 MODE INDICATORS (p. 15) Indicates the temporarily selected operating mode.

s Rear panel

q ANTENNA TERMINAL [ANT] (p. 9) Connects a 50 antenna with a PL-259 connector and a 50 coaxial cable. w DC POWER SOCKET [DC 13.8V] (p. 10) Accepts 13.8 V DC through the supplied DC power cable.
u ELECTRONIC KEYER JACK [KEY] Accepts a paddle to activate the internal electronic keyer. Selection between the internal electronic keyer and straight key operation can be made in initial set mode.
When connecting a straight key

Rear panel view

e TUNER CONTROL SOCKET [TUNER] (p. 11) Accepts the control cable from an optional antenna tuner. r REMOTE JACK [REMOTE] (p. 11) For use with a personal computer for remote operation of transceiver functions, and data cloning between transceivers. t EXTERNAL SPEAKER JACK [EXT SP] Connects an 8 external speaker, if desired. When an external speaker is connected, the internal speaker does not function. y ACCESSORY SOCKET [ACC] (p. 6) Enables connection to external equipment such as a TNC for data communications or a linear amplier, etc.

When connecting a paddle

(dot) (com) (dash)
i ALC INPUT JACK [ALC] Connects to the ALC output jack of a non-Icom linear amplier. o SEND CONTROL JACK [SEND] Goes to ground while transmitting to control external equipment such as a linear amplier. Max. control level: 16 V DC/2 A !0 GROUND TERMINAL [GND] (p. 9) Connects the terminal to ground.

D ACC SOCKET INFORMATION

ACC socket
ACC PIN # NAME DESCRIPTION SPECIFICATIONS

8V GND

Regulated 8 V output. Connects to ground.

Red Black : positive + terminal : negative _ terminal
CONNECTING PS-85 DC POWER SUPPLY
PS-85 Connect to an AC outlet using the supplied AC cable. DC power socket DC power cable
CONNECTING NON-ICOM DC POWER SUPPLY
DC power supply AC outlet DC power socket

13.8 V 20 A _ +

AC cable

_ black

Supplied DC power cable

20 A fuses

CONNECTING A VEHICLE BATTERY

NEVER connect to

a 24 V battery.

Grommet

NOTE: Use terminals for the cable connections. Crimp
12 V battery Supplied DC power cable

Solder

s Advanced connections
MIC The AFSK modulation signal can be input from [MIC]. (p. 25)

HEADPHONES

[REMOTE] (pgs. 41, 42) Used for computer control and transceive operation, and cloning operation between transceivers. with
AT-120, AT-130, or AH-4 (p. 44)

AH-2b or long wire

ANTENNA Connects a linear amplifier, etc.
ACC SOCKETS (p. 6) EXTERNAL SPEAKER (p. 44)
[SEND], [ALC] Used for connecting a non-Icom linear amplifier.

SP-21, etc.

s External antenna tuners
CONNECTING AN ANTENNA TUNER (p. 44)
Long wire or optional AH-2b
Coaxial cable (from the tuner)

Control cable

IC-78 Ground Ground

AT-120/AT-130/AH-4

OPERATION

s Selecting a channel

The transceiver has 99 memory channels. However, the number of channels can be restricted in initial set mode (p. 32) depending on your needs. A total of 3 ways of channel selections are available to suit your operating style. D Using the channel selector Rotate the channel selector clockwise (channel number increases) or counterclockwise (channel number decreases) to select desired channel. This is the most useful way of channel selection.

Channel 1

Rotate the channel selector
D Using up/down switches Push [ DN]/[UP ] on the front panel or the microphone to select the desired channel. This way is convenient when changing a small number of channels. When a duplex channel (different frequencies between transmit and receive) is selected, appears.

Channel 2

or Push [ DN]/[UP ] switch

to select a channel

Channel 99
D Using the keypad Enter the number of the desired channel number using the keypad (0 to 9), then push [ENT]. This way is convenient for remembering the usage and stored channel number, or when changing large a number of channels. When a duplex channel (different frequencies between transmit and receive) is selected, appears. When a blank channel (no frequency is programmed) is selected, appears.
Example 1 selecting channel 8 Push Push
Blinks Example 2 selecting channel 25 Push Push Push

Blinks

s Frequency indication
By pushing the [FC], channel comment indication or frequency indication can be selected. D Transmit frequency indication By pushing the [TXF], transmit frequency is indicated, regardless channel comment or frequency indication. While transmit frequency is indicated, ashes.
Channel indication Push Frequency indication Push
Flashes Transmit frequency indication

s Lock function

The lock function electronically locks the main dial to prevent accidental channel changing. Push [LOCK] to turn the lock function ON and OFF. Before channel selection, turn this function OFF.
Appears while lock function is activated.

s Scan function

Scan function repeatedly scans programmed channels. This function is convenient to wait for calls on multiple channels.

ch 2 ch 1

w Push [ DN] or [UP ] for 1 sec. to start channel scan.

ch 5 ch 7 ch 6

[ DN]/[UP ] switches
q Set [RF/SQL] control at the center (12 oclock) position (opening squelch), then rotate [RF/SQL] control clockwise to the position where the noise disappears.
Shallow Recommended position

Appears while scanning.

The SCAN indicator appears.
e When a signal is received, channel scan pauses on that channel. r Push [ DN] or [UP ] to cancel channel scan. NOTE: The scan resume condition (the action after signal receiving) can be selected as scan resume or scan cancel in the initial set mode (p. 31).

A segment appears in the S-meter to indicate the S-meter squelch level.

s Functions for transmit

Output power and microphone gain
Setting output power q Push [SET] for 1 sec. to select quick set mode. w Push [ UP]/[ DN] to select RF POWER. e Rotate the main dial to select the desired output.
Output power is displayed in 101 steps (L, 199 and H) but is continuously selectable.
Available power SSB/CW/RTTY: AM:

*Carrier power

2 (or less) to 100 W 2 (or less) to 40 W* Maximum output power is selected.
Setting microphone gain Microphone gain must be adjusted properly so that your signal does not distort when transmitted. q Select SSB or AM mode. w Push [SET] for 1 sec. to enter the quick set mode. e Push [ UP]/[ DN] to select MIC GAIN. r Adjust the mic gain while speaking into the microphone, so that the ALC meter does not exceed the ALC zone. t Push [SET] to exit quick set mode. Microphone gain is set to 50.

ALC zone

Meter function
The bar meter in the function display acts as an Smeter (for relative signal strength) during receive and can be selected for one of three functions during transmit. Push [SET] to select the PO, ALC and SWR meter mode.
Display Indication PO Measurement Indicates the relative RF output power. Indicates the ALC level. When the meter movement shows the input signal level exceeds the allowable level, the ALC limits the RF power. In such cases, reduce the microphone gain (see above). Indicates the SWR over the transmission line.

ALC SWR

Measuring SWR q Conrm that the output power is over 30 W. w Push [SET] to select the SWR meter. e Push [MODE] to select CW or RTTY operation. Key down or push [PTT] to transmit; then read the actual SWR from the meter:
1.5; well matched antenna 1.5; check antenna or cable connection, etc. The best match is in this range.

Microphone compressor

IC-78 has a built-in, low distortion Mic compressor circuit. This circuit increases your average talk power in SSB mode and is especially useful when the receiving station is having difculty copying your signal. q Select USB or LSB mode. w Push [COMP] switch to turn mic compressor ON. e Conrm the ALC level.
Push [SET] to select the ALC meter. Speak into the microphone at a normal voice level. If the ALC meter peak past the ALC zone, re-adjust the mic. gain. (p.16) Be sure the mic gain is in the range of 20 to 50. ALC zone [COMP] switch Adjust [MIC GAIN] so that the ALC meter reads within the ALC zone.

Optional lter variations Name FL-52A FL-53A FL-96 FL-222 FL-257 Band width 500 Hz/6dB 250 Hz/6dB 2.8 KHz/6dB 1.8 KHz/6dB 3.3 KHz/6dB Mode CW/RTTY-N CW/RTTY-N SSB-W SSB-N SSB-W
When an optional lter is installed, set the optional lter in initial set mode. An optional lter is not selected by default.
t Push [SET] to exit quick set mode. Filter construction (Rx)
2nd IF signal CFWS450HT (6 kHz)*3 Through FL-65 (2.4 kHz)*1 FL-257 (3.3 kHz)*2 FL-96 (2.8 kHz)*2 FL-222 (1.8 kHz)*2 FL-52A (500 Hz)*2 FL-53A (250 Hz)*2 2nd IF signal/DET
*1 AM; Narrow, SSB/CW/RTTY; Normal *2 OPTION *3 AM; Normal, SSB/CW/RTTY; Wide
Filter selection table no WIDE SSB NORMAL NARROW WIDE CW NORMAL NARROW WIDE RTTY NORMAL NARROW WIDE NORMAL NARROW 6 kHz* 2.4 kHz 6 kHz* 2.4 kHz 6 kHz* 2.4 kHz 6 kHz 2.4 kHz FL-52A 6 kHz* 2.4 kHz 500 Hz* 6 kHz* 2.4 kHz 500 Hz 6 kHz* 2.4 kHz 500 Hz 6 kHz 2.4 kHz 500 Hz* FL-53A 6 kHz* 2.4 kHz 250 Hz* 6 kHz* 2.4 kHz 250 Hz 6 kHz* 2.4 kHz 250 Hz 6 kHz 2.4 kHz 250 Hz* FL-kHz* 2.8 kHz 2.4 kHz 6 kHz* 2.8 kHz 2.4 kHz 6 kHz* 2.8 kHz 2.4 kHz 6 kHz 2.4 kHz 2.8 kHz* FL-kHz* 2.4 kHz 1.8 kHz* 6 kHz* 2.4 kHz 1.8 kHz 6 kHz* 2.4 kHz 1.8 kHz 6 kHz 2.4 kHz 1.8 kHz* FL-kHz* 3.3 kHz 2.4 kHz 6 kHz* 3.3 kHz 2.4 kHz 6 kHz* 3.3 kHz 2.4 kHz 6 kHz 2.4 kHz 3.3 kHz*
*Can be used when the expanded lter selection is turned on in the initial set mode. (see next page)

s Filter setting

When an optional lter is installed, set the optional lters in initial set mode. Optional filters are not selected by default. (p. 33)

D Optional lter setting

q While pushing and holding [SET], push [PWR] to enter initial set mode. w Push [UP Y] or [Z DN] several times until FIL appears on the display. e Rotate the channel selector to select the installed lter.
no, 52A, 53A, 96, 222 and 257 indicate no optional filter, FL-52A, FL-53A, FL-96, FL-222 and FL-257, respectively for 455 kHz IF lter selection.
r Push [PWR] for 1 sec. to exit initial set mode.
D Expanded lter selection
The selectable lter combinations can be expanded by setting the expanded lter selection to ON. Then extra wide or narrow lter can be selected on desired mode. q While pushing and holding [SET], push [PWR] to enter initial set mode. w Push [UP Y] or [Z DN] several times until EXP FIL appears. e Rotate the channel selector to turn the expanded lter selection on.
If on is selected, the expanded lter selection can be used.

FL: full break-in SE: semi break-in oF: no break-in r Set the CW delay time when semi break-in operation is selected. (see p. 30)
Push [SET] for 1 sec. to enter quick set mode; push [UP Y] or [Z DN] several times until BK-DELAY appears, then rotate the channel selector to select the desired delay time.
Delay time of 6 dots is selected in quick set mode for semi break-in operation.

CW pitch control

The received CW audio pitch and monitored CW audio pitch can be adjusted to suit your preferences (300 to 900 Hz) without changing the operating frequency. q Push [SET] for 1 sec. to enter quick set mode. w Push [ UP]/[ DN] one or more times until CW PITCH appears, then rotate the main dial to set the desired pitch. (p. 29)
This shows the default setting for the CW pitch control (600 Hz).

CW reverse mode

The CW-R (CW Reverse) mode receives CW signals with a reverse side CW carrier point like that of LSB and USB modes. Use this mode when interference signals are near the desired signal and you want to change the interference tone. q Push [MODE] one or more times to select CW mode. w Push [MODE] for 1 sec. to switch between CW and CW-R modes.
1/3 octave BFO 1/2 octave BFO
Desired signal Interference (600 Hz) (800 Hz) CW mode (USB side)
Desired signal Interference (600 Hz) (400 Hz) CW REV mode (LSB side)

Electronic CW keyer

The IC-78 has an electronic keyer. Both keying speed and weight (the ratio of dot : space : dash) can be set in quick set mode. Setting the electronic keyer q Push [MODE] one or more times to select CW mode. w While pushing and holding [SET], push [PWR] to enter initial set mode. e Push [ UP]/[ DN] one or more times until CW PADDL appears, then rotate the main dial to select the paddle type.
When ud is selected, the up/down switches on the microphone can be use as a paddle. When using up/down switches as a paddle, squeeze keying function is not available.
KEYING WEIGHT EXAMPLE: morse code K
DOT DASH (Fixed*) DASH Weight setting: 1:1:3 (default) Weight setting: Adjusted
Adjustable range SPACE (Fixed*)

s Channel comment programming
The IC-78 has a capability to assign up to 8-character channel comments for each operating channel. This provides easy recognition of channel usage, or station names, etc. q Select the desired channel by pushing [ DN]/[UP ], rotating the channel selector, or using the keypad. (p. 13) w Push [FC] to select channel comment indication, if desired. e Push [ENT] for 1 sec. to enter channel comment programmable mode. 1st digit blinks r Push corresponding keys to enter desired characters. (see the following chart) Push [ DN]/[UP ], or rotate the channel selector to move the cursor to select the next character, or to change the digit. t Push [ENT] for 1 sec. to store the channel comment.
Channel comment programming example
Push or rotate channel selector, then; 2 (M) 2 (2 spaces) 1 (2)

for 1 sec.

Corresponding characters KEY Assignable characters (1), ( ( ), (), (>), (4), (7), (space), ( ) ), (/), (@) (G), (P), (H), (R), (I) (S) (), (<), (), (+), (=), (5), (8), (J), (T), (K), (U), (L) (V) (6), (9), (0), (M), (W), (Q), (N), (X), (Z) (O) (Y) (2), (A), (B), (C) (3), (D), (E), (F) KEY Assignable characters KEY Assignable characters

(space w/change digit)

SET MODE

s General

Set mode is used for programming infrequently changed values or conditions of functions. The IC-78 has 2 separate set modes: quick set mode and initial set mode.
D Quick set mode operation
q While power is ON, push [SET] for 1 sec.
Quick set mode is selected and one of its items appears. [DIAL]
w Push [UP Y] or [Z DN] to select the desired item. e Rotate the main dial to set the values or conditions for the selected item. r Repeat w and e to set other items. t To exit quick set mode, push [SET] momentarily.
[DISPLAY EXAMPLE: QUICK SET MODE]

Value of Condition

D Initial set mode operation
q Push [PWR] for 1 sec. to turn power OFF. w While pushing and holding [SET], push [PWR] to turn power ON.
Initial set mode is selected and one of its items appears. [DIAL]
e Push [UP Y] or [Z DN] to select the desired item. r Rotate the main dial to set the values or conditions for the selected item. t Repeat e and r to set other items. y To exit initial set mode, push [PWR] for 1 sec. to turn power OFF. u Push [PWR] to turn power ON again.

RTTY shift

This item adjusts RTTY shift. There are 4 selectable values: 170, 200, 425 and 850. The default is 170 Hz.

Dimmer

This item selects LCD back light brightness. There are 3 selectable values: Off, Low and High. The default is HI (High).

Tuning step

This item selects tuning step for the channel selectors tuning. The default is 1 k (1 kHz).

s Initial set mode items

RF/SQL control action
Select [RF/SQL] control action from RF/squelch, automatic (acts as squelch in AM modes; as RF in SSB/CW/RTTY modes), or the squelch. (See p. 15) The default is Sq (squelch).
A beep sounds each time a switch is pushed to conrm it. This function can be turned OFF for silent operation. The default is on.

Beep level

Adjusts the conrmation beep level from 1 to 99. The default is 50.

Side-tone level

Adjusts the CW side-tone level from 1 to 99. The default is 30.
Selects meter peak hold function on or off. The default is on.

Scan speed

Selects scanning speed from High and Low. The default is HI (High).

Scan resume

Selects the scan resume function ON or OFF. ON: Resumes 10 sec. after stopping on a signal (or 2 sec. after a signal disappears); OFF: Does not resume after stopping on a signal. The default is on.

AM Noise blanker

When this item is set to ON, the noise blanker function is available in AM mode. This is useful when communicating in AM mode (the noise blanker function should not be used when listening to regular AM broadcasts as it may degrade the receive audio). The default is on.
s Initial set mode items (continued)

Key type

Selects the CW paddle type. Four selections are available. n : normal (for electronic keyer use) r : reverse (for electronic keyer use) oF : Turns OFF the electronic keyer (for straight key use) ud : For using the microphones [UP]/[DN] keys instead of the paddle. The default is n (normal).

Tuner type

Selects the connected antenna tuner type. Four selections are available. no : No optional tuner is connected. 4 : When AH-4 is connected. 12 : When AT-120 is connected. 13 : When AT-130 is connected. The default is no.
Number of maximum memory channels
Sets number of programmable memory channels from 1 to 99. The default is 99.

CI-V baud rate

Sets the data transfer rate. When Auto is selected, the baud rate is automatically set according to the connected controller or remote controller. The default is At (Auto).

CI-V address

To distinguish equipment, each CI-V transceiver has its own Icom standard address in hexadecimal code. The IC-78s address is 62. When 2 or more IC-78s are connected to an optional CT-17 CI-V LEVEL CONVERTER, rotate the main dial to select a different address for each IC-78 in the range 01H to 7FH. The default is 62.

Note: Blank channels cannot be selected with
[ DN]/[UP ], and channel selector; can only be selected with the keypad.
e Push [0], then [ENT]. r Push [ENT] for 1 sec. (3 beeps are emitted), to clear the selected channel.

Appears when cleared.

s 2-Tone alarm operation
The 2-tone alarm is used for instant emergency operation. When the 2-tone alarm function is activated, the call channel (2182 kHz, distress channel, is pre-programmed) is selected automatically, and emits a distress alarm.

D Operation

Push [TONE] to emit a distress alarm signal for a specied time period from the speaker only.
appears. Push [TONE] again to cancel the distress alarm signal emission. Push [CALL] to return to previous condition. [TONE]
Push [TONE] for 1 sec. to transmit a distress alarm or alarm testing signal for a specied time period.
appears with the transmit indicator. Push [TONE] again to cancel the distress alarm signal transmission. Push [CALL] to return to previous condition.
s Opening the transceivers case
Follow the case and cover opening procedures shown here when you want to install an optional unit or adjust an internal unit, etc.
CAUTION: DISCONNECT the DC power cable
from the IC-78 before performing any work on the transceiver. Otherwise, there is danger of electric shock and/or equipment damage. q Remove the 5 screws from the top of the transceiver and 4 screws from the sides, then lift up the top cover. w Remove the 5 screws from the bottom of the transceiver, then remove the bottom cover.
s Optional bracket and carrying handle

D Mounting bracket

An optional IC-MB5 MOBILE MOUNTING BRACKET is available to install the radio under a table, on a wall, in a vehicle, etc. Select an area to mount the transceiver keeping in mind that the weight of the transceiver is approx. 3.80kg.

D Carrying handle

An optional handle allows you to easily carry and transport the transceiver. Attach the MB-23 CARRYING HANDLE with the supplied rubber feet as shown.
s CR-338 HIGH STABILITY CRYSTAL UNIT
By installing the CR-338, the total frequency stability of the transceiver will be improved. q Remove the bottom cover as shown in the previous diagram. w Disconnect W2 from J4401 (MAIN unit) and W3 from J4201 (MAIN unit). e Remove 9 screws from the PLL unit, disconnect P4 from J201 (MAIN unit) and P2 from J401 (MAIN unit), then remove the PLL unit. r Remove the supplied internal crystal and replace with the CR-338.

Sensitivity is too low, The antenna is not connected properly. and only strong signals Antenna is not properly matched to the operating frequency. are audible. Wrong tuner condition is selected in set mode. The attenuator is activated.

RECEIVE TRANSMIT DISPLAY

Received audio is un- Wrong type of mode (emission) is se- Push [MODE] to select the proper operat- p. 15 clear or distorted. lected. ing mode (emission). Noise blanker is turned ON when receiv- Push [NB] to turn the noise blanker OFF. p. 19 ing a strong signal. The [RIT] control is rotated too far clock- Adjust the [RIT] control to receive proper p. 19 wise, or counterclockwise. audio output. Your signal does not Antenna tuner is improperly matched to Push [TUNE] to tune the connected an- p. 18 reach as far away as the operating frequency when manual tenna tuner. usual. tuning is selected. CW or RTTY mode is selected for voice Push [MODE] to select USB, LSB, or AM p. 15 transmission. mode. Transmit signal is un- Wrong type of mode (emission) is se- Push [MODE] to select the proper operat- p. 15 clear or distorted. lected. ing mode (emission). Microphone is too close to your mouth. Speak into the microphone naturally and p. 15 do not hold the microphone too close to your mouth. The displayed channel The dial lock function is activated. does not change properly. A quick set mode is selected. Push [LOCK] to turn the lock function p. 14 OFF. Push [SET] to exit the quick set mode. p. 28

s Fuse replacement

If a fuse blows or the transceiver stops functioning, try to nd the source of the problem, and replace the damaged fuse with a new, rated fuse.
DC POWER CABLE FUSE REPLACEMENT
from the transceiver when changing a fuse. The IC-78 has 2 types of fuses installed for transceiver protection. DC power cable fuses.. FGB 20 A Circuitry fuse.. FGB 4 A

20 A fuse

CIRCUITRY FUSE REPLACEMENT The 13.8 V DC from the DC power cable is applied to all units in the IC-78 through the circuitry fuse. This fuse is installed in the MAIN unit. q Remove the top cover as shown on p. 48 w Replace the circuitry fuse as shown in the diagram at right. e Replace the top cover.

FGB 4 A PA unit

s Resetting the CPU
When rst applying power or when the function seems to be displaying erroneous information, reset the CPU as follows: q Make sure transceiver power is OFF. w While pushing [UP Y] and [Z DN], push [PWR] to turn power ON.
The internal CPU is reset.
Returns programmed values in both quick and initial set mode to their defaults.

REMOTE JACK INFORMATION

s CI-V remote control

CI-V connection example

4 audio filters; headphone jack; can connect to 2 transceivers. Input impedance: 8 Max. input power: 5 W
Designed for base station operation. Input impedance: 8 Max. input power: 5 W

SM-6 DESKTOP MICROPHONE

SM-8 DESKTOP MICROPHONE

SM-20 DESKTOP MICROPHONE

Electret condenser-type desktop microphone.
Including 2 connection cables for simultaneous connection of 2 transceivers. Has [UP]/[DOWN] switches.
Unidirectional, electret microphone for base station operation. Includes [UP]/[DOWN] switches and a low cut function.

HM-36 HAND MICROPHONE

MB-23 CARRYING HANDLE
IC-MB5 MOBILE MOUNTING BRACKET
Hand microphone equipped with [UP]/[DOWN] switches. Same as supplied.
Carrying handle, convenient for portable operation.
Transceiver mounting bracket for mobile operation.
CT-17 CI-V LEVEL CONVERTER
For remote transceiver control using a personal computer. You can change frequencies, operating mode, memory channels, etc.
OPC-420 4-CONDUCTOR SHIELD CABLE
For the connection between transceiver and antenna tuner. Compatible with the control cable, that is supplied with the AT-120, AT-130 and AH-4. Cable length: 10 m (32.8 ft)

OPC-599 ADAPTER CABLE

13-pin, ACC connector to 7-pin + 8-pin ACC connector.
A-5658H-1EX-w Printed in Japan 2000 Icom Inc.
1-1-32 Kamiminami, Hirano-ku, Osaka 547-0003 Japan

Icom CI-V Interface Guide
First of all, thank you for purchasing my Icom CI-V interface cable. Hopefully, this guide will allow you to get your PC connected to your Icom Radio with the minimum of effort. Your Interface comes with a 30 Day No Questions Satisfaction Guarantee and full 12 Month warrantee against material failure.
Please note: Although I have never had any interface damage a Radio or associated Computer, you use this item entirely at your own risk. I will not be responsible for any damage caused to your equipment through use of this product. You should always follow the manufacturers instructions when connecting items to your equipment. To use this cable you will need a PC with a standard RS-232 9-pin serial port and suitable control software. If your PC does not have an RS-232 port, the interface will work well in conjunction with USB to RS-232 converters. I do not sell these but they are readily available from Computer outlets or Ebay. The interface connects directly between the 9-Pin RS-232 port of your PC and the 3.5mm CI-V and PTT/CW jacks of your radio. (See note below) Identification of CI-V and PTT/CW cables The cable that plugs into the CI-V port of your Radio is terminated in a 3.5mm mono jack plug. The PTT/CW cable is terminated in an 8 pin Din connector. (Or 13 pin Din if you purchased one of these from me) This unit is compatible with the CI-V Interface on the following radios IC-275 IC-703 IC-706 (all) IC-707 IC-718 ++ == ++ == IC-729 IC-735 IC-736 IC-737 IC-738 ++ ++ ++ ++ ++ IC-746Pro IC-756 IC-756Pro IC-756Pro IC-756Pro ++ II III IC-775 DSP IC-78 IC-7800 IC-781 IC-820 ++ == ++ ++
IC-725 ++ IC-7000 IC-761 ++ IC-821
IC-726 ++ IC-7400 IC-765 ++ IC-910 ++
IC-728 ++ IC-746 IC-775 ++ IC-970 ++
IC-R10 IC-R20 * IC-R7000 IC-R7100 IC-R72 IC-R75 IC-R8500 IC-R9000 IC-375 IC-575 ++ ++ *The interface will work with the IC-R20 if you change the 3.5mm mono jack to a 3.5mm stereo jack with the data wire to the ring rather than the tip. ++ These Radios do not allow for PTT/CW control via the CI-V command set. The additional PTT simply plugs into the accessory 1 (ACC1) socket on the rear of your radio. == The Icom IC-718, IC-78 and IC-706 radios have a 13 Pin Din accessory connector. You will need to source a replacement connector. Remove the 8 pin Din connector and replace with your new 13 pin din connector. The screen is wired to Pin 2 and the inner conductor (send signal) is wired to pin 3. Software There is plenty of suitable software available on The Net, some being free and others paid for. The most popular software seems to be: Ham Radio Deluxe TRX-Manager MixW N1MM Download from Download from Download from Download from http://hrd.ham-radio.ch/ http://www.trx-manager.com/ http://www.mixw.net/ http://pages.cthome.net/n1mm/
Here is a simple guide to ensure you get your interface up and running 1st time. Although the interface is designed to minimize any damage to your radio and PC and I have never had a reported problem, I suggest that you turn your PC and radio off when first connecting the PC to the CI-V port on your radio. If your PC has an RS-232 port, ensure it has been turned on in the BIOS You may run into connection problems if you have another application running that also needs to access your serial port. Ensure these applications are closed when using this interface.
Ensure the CI-V address of your radio is set to the default to begin with otherwise your chosen software will not communicate with your radio. Refer to your radios manual on how to do this. The interface is designed to work at all baud rates supported by your radio. For best performance, I suggest you use the highest speed available. When configuring your software of choice, ensure that the option to provide interface power via the DTR signal is selected. Ensure your software of choice is set for the correct Com Port, Radio Manufacturer/Type and that the Baud Rate matches that pre-configured on your radio. (If you are having problems, some software allows you to Auto Detect the Com Port and Baud Rate settings and so it will do the searching for you)

PTT/CW Set Up

With the 8 Pin Din Connector plugged into the Accessory 1 socket on the rear of your radio, all you need to do is configure your preferred Rig Control Software to activate the PTT line when you push the On Screen PTT button or the software keys the Radio for you. Here are a couple of examples of set-up on Ham Radio Deluxe and MixW. For Ham Radio Deluxe, Hit F8 which will bring up the program options screen. From here you can select the COM Port TX tab. Select the RTS button in the COM Port Pin section and hit apply and OK out. For MixW, under the Configuration Menu, select the TRCVR CAT/PTT Submenu. In here is a PTT& CAT Interface box with a Details button. When you hit the Details button, you can set RTS to control PTT in a drop down box.
For any other software, just find the section in the configuration where it allows you to control PTT of your radio via the RTS line of the RS232 port. And finally, the legal bit. I will not be held responsible for any damage you do to your PC/Radio by mis-use of my products or by any addition you make. All connections are made at your own risk so bear this in mind before you proceed.
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