Troubleshooting; Specifications - Crown CTs 4200 Operation Manual

6 Troubleshooting

CONDITION: No sound, even though
the amp has power. Power LED is on
without flashing and the amp is receiving an
input signal. Signal indicator is flashing.
• Speakers not connected.
• Open circuit due to speaker failure.
• There is a short on the amplifier
output. First disconnect your speakers
from the affected channel(s) one by one
to determine if one of the loads is
shorted.
• DC or excessive low-frequency signal at
the amplifier's output has enabled
speaker protection.
"Off/Flashing/On" above means that
the LED can be off, or flashing, or on.
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CTs Power Amplifiers CTs Power Amplifiers

7 Specifications

CONDITION: Thermal indicator is
flashing.
POSSIBLE REASON:
• The amplifier has become too hot for
safe operation. Check for loads less than
2 ohms, and for excessive input levels.
Figure 7.1 CTs 4200
Check for proper ventilation and proper
mode-switch setting. Driving low-
impedance loads while in high-voltage
mode can cause overheating.
CONDITION: All channel thermal
indicators are flashing.
POSSIBLE REASON:
• Power supply thermal overload.
CONDITION: No input signal.
(Signal indicator is not flashing even though
audio is applied and channel is ready).
POSSIBLE REASON:
• Input signal level is very low.
• Input cables have become disconnected.
CONDITION: Bridge LED is flashing.
Figure 7.2 CTs 8200
POSSIBLE REASON:
Power Chart
• The mode switch was switched while the
power was on.
Operation Manual Operation Manual
CTs 4200: MINIMUM GUARANTEED POWER
Dual Mode
Channels Driven 4
1 kHz 20 Hz - 20 kHz
4 Ohm 260 215
8 Ohm 180 190
70V (25 Ohm) at 0.1% THD 220 220*
Power Chart
Bridge-Mono Mode
Channel Pairs Driven
1 kHz
8 Ohm
520
16 Ohm 400
100V (50 Ohm) at 0.1% THD 220
* Constant Voltage full bandwidth power ratings support 100 Hz - 20 kHz due to automatic high-pass filters.
CTs 8200: MINIMUM GUARANTEED POWER
Dual Mode
Channels Driven 8
1 kHz 20 Hz - 20 kHz
4 Ohm 200 175
8 Ohm 160 155
70V (25 Ohm) at 0.1% THD 200 185*
Bridge-Mono Mode
Channel Pairs Driven 4
1 kHz
8 Ohm 400
16 Ohm 320
100V (50 Ohm) at 0.1% THD 200
* Constant Voltage full bandwidth power ratings support 100 Hz - 20 kHz due to automatic high-pass filters.
(in watts, 0.1% THD) 120VAC, 60 Hz units
2 1
1 kHz 1 kHz 20 Hz - 20 kHz
270 270 225
210 220 210
240 250 245*
2 1
20 Hz - 20 kHz 1 kHz 20 Hz - 20 kHz
430 560 450
380 440 420
220* 250 245*
(In watts, 0.1% THD) 120VAC, 60 Hz units
4 1
2
1 kHz 1 kHz 1 kHz 20 Hz - 20 kHz
250 260 270 230
190 200 220 220
220 240 250 230*
2 1
20 Hz - 20 kHz 1 kHz 1 kHz 20 Hz - 20 kHz
350 500 540 460
310 380 440 440
185* 220 250 230*
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