Fuse Replacement - Icom IC-M804 Instruction Manual

■ Fuse replacement

The transceiver has 2 fuses to protect internal circuitry.
If the transceiver stops functioning, and only after
confirming a fuse is probably blown, check the fuses
below.
• DC-DC converter unit: APS 58 V 5 A
• PA unit:
CAUTION: Disconnect the DC power cable from the
transceiver before replacing a fuse.
1. Unscrew the 4 cap bolts from the top case with a
6 mm Allen wrench.
2. Open the Main unit, and then disconnect 1 flat
and 2 coaxial cables, as shown below.
Flat cable
APS 58 V 5 A
Coaxial cables
CONNECTIONS AND INSTALLATION
3. Unscrew the 26 screws from the shield covers,
and then open the covers.
CAUTION: Disconnect the DC power cable from the
transceiver before replacing a fuse.
4. Replace the circuitry fuses, as shown below.
Fuse in DC-DC
converter unit
Fuse in PA unit
CAUTION: When removing a fuse, use longnose
pliers to protect your fingers and the fuse holders.
5. Replace the shield covers, flat cable, coaxial
cables, and top case to their original locations.
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