Icom IC-M804 Instruction Manual - Page 75

Fuse replacement, CAUTION

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8 CONNECTIONS AND INSTALLATION ■■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: APS 58 V 5 A 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. 3. Unscrew the 26 screws from the shield covers, and then open the covers. 8 2. Open the Main unit, and then disconnect 1 flat and 2 coaxial cables, as shown below. Flat cable Coaxial cables 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. 70

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70
CONNECTIONS AND INSTALLATION
8
8
■
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:
APS 58 V 5 A
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.
Coaxial cables
Flat cable
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 PA unit
Fuse in DC-DC
converter 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.