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Model: IC- R
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Model: IC-R7000
Division: Amateur
Note: This service bulletin is meant for technical per-
sonnel with experience working on solid state com-
munications equipment. Damage caused by im-
properly installing this modification may cause
ICOM to charge for subsequent repairs to the
product. ICOM does not warrant this modification.
Bulletin #: 3Nov86-001
Date: November 3, 1986
Subject: Reduce intermodulation from FM stations (70-108
MHz) and TV stations (165-245 MHz)
Procedure
Write to ICOM's customer service department for a copy of
this service bulletin.
Bulletin #: 3Nov86-004
Date: November 3, 1986
Subject: The frequency displayed and actually received are
not the same
Procedure
1. Check the location of C24 and W80 on the logic board
(compare against the schematic) to insure that they are in-
stalled in the correct position.
Bulletin #: 24287-001
Subject: The S-meter may not drop to 0 when using the
receiver between 500 MHz and 800 MHz with no sig-
nal.
Procedure
1. Install a 10mf 16V electrolytic capacitor between the emit-
ter of Q5 and ground on the Dc to DC Converter board.
Bulletin #: 24587-002
Subject: Increase the number of memory channels to 200
Procedure
1. Cut foil trace to IC-8 pin 19 on the logic board to remove
it from ground.
2. Add a 47K resistor and between pin 19 and pin 24 of IC-8.
3. Add a SPST switch from pin IC-8 pin 19 to ground.
Operation
1. With the new switch closed access to memory channel 0 to 99
is possible.
2. With the new switch open access to memory channels 100 to
199 is possible.
Note: It is not possible to scan between the two banks of
memory.
Bulletin #: 35187-001
Subject: Audio becomes distorted (clipped) when the radio
is warm. The period of time required for this
problem to become evident varies depending on the
ambient temperature. This problem may not be evi-
dent at low audio levels.
Procedure
Write to ICOM's customer service department for a copy of
this service bulletin.
Bulletin #: 35887-003
Subject: The remote relay sometimes stays energized after a
signal is no longer present. The radio must be
turned off and back on to clear this situation
before the modification.
Procedure
1. Remove the covers from the radio and remove the main circuit
board on the side of the radio.
2. Cut the trace between the base of Q5 and R106 on the foil
side of the main board.
3. Install a RD6A diode (this part is critical and must be ob-
tained from ICOM) with its cathode toward R106 across the
cut in the trace.
4. Reinstall the board and insure mechanical clearance of the
new diode.
5. Verify proper operation of the recorder function.
Bulletin #: 11688-001
Date: April 25, 1988
Subject: To improve audio quality in SSB operation
Procedure
1. Remove the top and bottom cover from the radio.
2. Remove the PLL board from the radio.
3. Change IC-1 from a MA78M08A to a MA78M08 (ICOM P/N 900-
00191) on the PLL board.
4. De-Solder and remove the VCO from the PLL board.
5. Change C6 (33 mf 10V electrolytic) to a 220 mf 10V
electrolytic (ICOM P/N 918-01477). Install shrink tubing on
the capacitor leads.
6. Change C17 (33 mf 10V electrolytic) to a 220 mf 10V
electrolytic (ICOM P/N 918-01477). Install shrink tubing on
the capacitor leads.
7. Reinstall the VCO unit on the PLL board.
8. Install the PLL board in the radio.
9. Replace the top and bottom cover.
Bulletin #: 13889-015
Date: April 1, 1988
Subject: If display fails to operate at power on
Procedure
1. Remove the top and bottom cover from the radio.
2. Remove the front panel sub-assembly from the main chassis of
the radio.
3. Remove the DC to DC converter from the radio.
4. Replace the following parts on the indicated boards.
Current New ICOM
Designator Part Board Part P/N
Q1 and Q2 2CS1214 DC to DC Converter 2SC2655 906-00385
R1 and R2 3.3 K DC to DC Converter 5.16K 915-01173
C2 and C4 DC to DC Converter .001mf 50V 918-01500
Q11 & Q12 Display Board 2SC2655 906-00385
R31 & R32 3.3 K Display 5.16 K 915-01173
C13 & C16 Display .001mf 50V 918-01500
5. Reassemble the boards and front panel on the radio.
6. Reinstall the top and bottom cover on the radio.
7. Test
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