User's Manual

11-2 Safety Circuits

In addition to the protection circuits above, there are other safety circuits

(inter-locked circuits) built in the amplifier.

They directly shut down AC power line for the primary of the power transformer,

and if shut down, AC power lamp (green), LCD display and cooling fan will all go

off.

In case this shut down has suddenly occurred during the transmission, stop

transmitting first and wait for several minutes. Pull off AC power plug and check

whether or not AC main fuses are blown.

 Thermal Switches Threshold

Heat Sink: 100 ℃

Power Transformer: 130 ℃

These shut-downs will automatically be relieved, when the internal heat cools

off. Be sure to turn off AC power switch, before you leave the operation desk.

Otherwise AC power will be turned on for itself right after the cooling.

130

℃

Main Fuse

Cover Switch

12V Sub

Power

Supply

Relay

AC200V

Heat Sink X-former

Power

X-former

100

℃

AC Power Relay