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- ic228
-
- I have the mod info from ICOM. It is best to have the diagram in
- front of you when performing the mod, but for the bold ones, here goes:
- There are three PC boards in the rig. The TX and RX boards are on the
- top and bottom of the rig. The logic board is behind the front panel, and
- the LCD display and front panel switches are mounted on it. It is the
- logic board which will be the object of your surgery.
- 1. Remove D-19
- 2. Install D-7 - (Type 1SS193)
- D 7 should have three terminals, but only one is used.
- It looks something like this:
- | C
- -----------
- | / | There is no connection to the terminal on the
- | / | lower right. The Cathode of a 1N914 diode
- ----------- Can be connected to the upper terminal, and
- A| | the Anode to the lower left. (as indicated by
- the C and A.
-
- In locating the positions of D-19 and D-7, reference the lithium battery.
- D-19 is at the 1 O'clock position near the edge of the board, and
- D-7 is at 2 O'Clock and adjacent to the battery.