7.1 MF/HF Radio telephone
7-1
7.1 MF/HF Radiotelephone
7.1.1 FS-2550/1562
1) Main unit
To update the program, change U6 on the CPU board, 05P0456.
Fig. CPU board(05P0456)
Verification of Program Number
1. Turn on the power while holding down [ENT]. All segments light.
2. Release the hand from the key.
3. Press any key and the key name pressed and program number are displayed.
Fig. 7.1.2 Display of Verification of Program Number
2) Antenna coupler
To update the program, change U1 on the COUP board, 05P0528. To gain access to the
parts on the board, remove the shield cover.
Chapter 7 Program update
FS-1562-15/25
U6: Ver No. 05-501-57-1xx
FS-2550
U6: Ver No. 05-501-58-1xx
111- - - -1
01581xx
Key indication
ROM Version No.
Fig. 7.1.3 CPU board(05P0528)
U1: Ver No. 05-501-61-1xx