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12. TABLE FOR PROTECTION CIRCUIT ACTIONS
Symptom
Excessive current flow
due to overload
Short circuit (under 0.5 )
Heat sink temperature rise
Unusual DC voltage output
Action
Current limiter operates
when load resistance is
under 2.5 (STEREO/
PARALLEL) or 5
(BTL).
Current limiter operates.
Speaker loads cut by
output relay.
Speaker loads cut by
output relay.
Speaker loads cut by
output relay.
Indicator
Peak indicator lights.
Protection circuit
indicator lights.
Protection circuit
indicator lights.
Protection circuit
indicator lights.
Remedy
Remove overload.
Check short circuit of
speakers and lines.
Check ventilation and
overload.
Contact your TOA
dealer.
Reset
Automatically reset if 4
(STEREO/PARALLEL) or
8
(BTL) load is
connected.
Switch power off, connect
correct load, and switch
power on.
Automatically reset if
temperature drops.
Switch power off, then
remove cause.
13. APPEARANCE AND DIMENSIONS
Unit: mm
11