Icom IC-7000 Instruction Manual - Page 146

14 MAINTENANCE ■ Fuse replacement If a fuse blows or the transceiver stops functioning, try to find the source of the problem, repair it, and replace the damaged fuse with a new, adequately rated fuse. C AUTION: Disconnect the DC power cable from the transceiver when changing a fuse. The IC-7000 has three fuses (DC power cable fuses × 2, circuitry fuse × 1) installed for transceiver protection. • DC power cable fuses ATC20 30 A • Circuitry fuse ATC20 5 A CIRCUITRY FUSE REPLACEMENT The 13.8 V DC from the DC power cable is applied to all units in the IC-7000, except for the power amplifier, through the circuitry fuse. This fuse is installed in the FRONT unit. R WARNING! NEVER attempt to remove fuse cover using your finger nails, this may result in injury. Screw driver DC power cable fuse replacement Fuse cover ■ Memory backup All of the CPU's memory is backed up by an EEPROM (Electronically-Erasable Programmable Read-Only Memory). All data you set, such as VFO, memory, set mode contents, etc. are stored in this EEPROM. There is no internal lithium battery. ■ Cleaning If the transceiver becomes dusty or dirty, wipe it clean with a dry, soft cloth. Fuse AVOID the use of strong chemical solvents such as thinner, benzine or alcohol to clean the transceiver. These may damage the transceiver's surfaces. 137